Patent Publication Number: US-6655860-B2

Title: Photosensitive material processing apparatus

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a brush roller for brushing a surface of a photosensitive material at a time of processing of the photosensitive material by a processing solution. More particularly, the present invention relates to a brush roller in which a web-like member provided with wire members is wound around a peripheral surface of a roller main body in a helical manner. 
     The present invention further relates to a photosensitive material processing apparatus for brushing a surface of a photosensitive material by a brush roller, in which a web-like member provided with wire members is wound around a roller main body in a helical manner, at a time of processing the photosensitive material by a processing solution. 
     The present invention also relates to a mounting structure of a pair of rollers provided in a photosensitive material processing apparatus for processing a photosensitive material such as a photosensitive surface printing plate or the like by a processing solution and transferring the photosensitive material while holding therebetween. 
     The present invention still further relates to a spray pipe, a pair of which is provided in a photosensitive material processing apparatus for processing a photosensitive material such as a surface printing plate or the like by a processing solution so as to be arranged in upper and lower portions with respect to a transferring path for the photosensitive material, and discharging the processing solution toward the photosensitive material. 
     The present invention yet further relates to a filter case provided in a photosensitive material processing apparatus for processing a photosensitive material or the like by a processing solution, to which a filter for removing a solid material in the processing solution is installed. 
     2. Description of the Related Art 
     &lt;&lt;Prior Art 1.&gt;&gt; 
     A photosensitive material includes a photosensitive surface printing plate (hereinafter, referred to as “PS printing plate”) in which a photosensitive layer is formed on a surface of a supporting body employing aluminum or the like. Further, the PS printing plate includes a so-called photo polymer printing plate on which a photo polymerization layer is formed as the photosensitive layer. 
     In a development processing apparatus for processing a development of an image exposed PS printing plate (hereinafter, referred to as “PS printing plate processor”), an image is formed by dipping the PS printing plate into a developing solution so as to swell the photosensitive layer (photo polymerization layer) and removing the photosensitive layer from a portion on the supporting body. Further, in the PS printing plate processor, the structure is made such that a removal of the unnecessary photosensitive layer from the portion on the supporting body can be promoted by brushing the surface of the PS printing plate dipped into the developing solution by a brush roller. 
     In this case, the brush roller used in the PS printing plate processor includes a cloth to which wire members are previously attached, that is, a structure in which a woven wire cloth corresponding to a web-like member is wound around a roller main body in a helical manner. In conventional, in the brush roller using the woven wire cloth, a back surface side of the woven wire cloth (a surface to which the woven wires are not attached) is bonded to a peripheral surface of the roller main body by an adhesive agent or the like, however, in the case of using the adhesive agent, there is a risk that the adhesive agent runs over the woven wire cloth so as to bind the wire members, and a bonding performance is reduced by the processing solution such as the developing solution or the like, whereby the woven wire cloth is peeled. 
     Accordingly, there has been proposed a brush roller structured such that a woven wire cloth wound around a roller main body in a helical manner is mechanically fixed to both end portions of an axial portion of the roller main body in a portion out of an area opposing to the PS printing plate by using a band or the like. 
     However, when the woven wire cloth is dipped into the processing solution such as the developing solution or the like, an elongation is generated in the woven wire cloth to no small extent (for example, about 0.3% after several months in the developing solution processing the PS printing plate). Further, a torsional force is applied to the woven wire cloth wound around the roller main body in a helical manner due to a contact pressure given by the wire members being contact with the PS printing plate. 
     Accordingly, an elongation is generated in the woven wire cloth and the winding with respect to the roller main body is loosened, in the structure made such that the woven wire cloth is simply fixed to both end portions along the axial direction of the roller main body. Further, the winding tightness is generated in one end side of the roller main body due to the torsional force applied to the woven wire cloth, and when the woven wire cloth is tensioned due to the winding tightness, there is a case that another end side is extended and a gap is generated between the woven wire cloths. The looseness and the gap in the woven wire cloth mentioned above appears on the surface of the PS printing plate as a surface irregularity so as to reduce a finish quality of the PS printing plate. 
     &lt;&lt;Prior Art 2.&gt;&gt; 
     As mentioned above, the brush roller used for processing the PS printing plate includes the cloth to which the wire members are previously attached, that is, the structure in which the woven wire cloth corresponding to the web-like member is wound around the roller main body in a helical manner. 
     In this case, in the case that the woven wire cloth is wound around the roller main body in a helical manner, a boundary portion between the woven wire cloths disposed adjacent to each other along the axial direction of the roller main body is generated around the roller main body in a helical shape. A density of the wire materials is reduced in the boundary portion of the woven wire cloth. 
     On the other hand, in a photo polymer printing plate employed in a computer to plate (CTP) or the like, it is necessary to increase a contact pressure applied to the PS printing plate by the wire members at a time of brushing. 
     However, in the case of increasing the contact pressure at a time of brushing, a surface irregularity of density of the wire members in the boundary portion of the woven wire cloth wound around the roller main body appears as a streak-like surface irregularity on the surface of the PS printing plate so as to reduce a finish quality of the image formed in the PS printing plate. 
     There is a case that the streak-like surface irregularity mentioned above clearly appears if the respective contact portions of the boundary portions of the woven wire cloths of two brush rollers with the surface of the PS printing plate are close to each other or overlapped with each other when brushing the surface of the PS printing plate, for example, with using two brush rollers. 
     &lt;&lt;Prior Art 3.&gt;&gt; 
     In the photosensitive material processing apparatus, a process such as a development or the like is performed by a plurality of processing solutions by dipping the photosensitive material into the processing solution while transferring the image exposed photosensitive material, and spraying the processing solution onto the surface of the photosensitive material. 
     For example, in the PS printing plate processor corresponding to the photosensitive material processing apparatus for processing the photosensitive surface printing plate (PS printing plate) as the photosensitive material, there are provided a plurality of processing steps using the processing solution such as a developing step of dipping the PS printing plate into the developing solution so as to process, a water washing step of spraying a water washing water to the PS printing plate so as to perform a water washing process, a desensitization step of applying a desensitization processing solution such as a gum solution or the like to the surface of the PS printing plate in which the water washing step is finished, so as to perform a desensitization process, and the like, thereby applying the developing, water washing desensitization processes and the like to the image exposed PS printing plate. 
     In the PS printing plate processor mentioned above, the structure is made such that at a time of transferring the PS printing plate from a processing tank in an upstream side to a processing tank in a downstream side, the PS printing plate is held between a pair of rollers so as to squeeze down the processing solution attached to the surface of the PS printing plate, thereby preventing the processing solution in the upstream side from being mixed into the processing solution in the downstream side. 
     In this case, in order to hold the PS printing plate by a pair of rollers so as to squeeze down the processing solution, it is necessary to apply a strong gripping force to a portion between a pair of rollers. As a structure applying a nipping force to a pair of rollers mentioned above, for example, both ends of an extension coil spring are connected to each other in a ring shape and the ring-like coil spring is wound around bearings pivoting the respective rollers. Further, there is employed a way of mounting the bearing of the lower roller to a side plate and urging the bearing of the upper roller toward the bearing of the lower roller by urging means using variously structured springs. 
     In order to squeeze down the processing solution from the PS printing plate, it is necessary to apply a great nipping force to a portion between a pair of rollers, so that it is necessary to employ a spring having a great urging force. 
     However, in the case of applying the great urging force to the portion between a pair of rollers by using the urging means such as the coil spring or the like which applies the urging force to the portion between the coil spring connected in a ring manner or the side plate and the bearing, it is not easy to attach and detach a pair of rollers with respect to the side plate. For example, it is necessary to urge one roller to another roller by engaging one end of the coil spring with the side plate and engaging another end of the coil spring with the bearing of one roller against the great urging force in a state that the bearings of the opposing rollers can move to directions being contact with each other and being apart from each other. Further, it is necessary to move another end of the coil spring apart from the bearing of one roller against the urging force when taking out a pair of rollers from the side plate, whereby ease of maintenance is reduced. 
     &lt;&lt;Prior Art 4.&gt;&gt; 
     In the PS printing plate processor, for example, in the water washing step, the structure is made such that a pair of spray pipes are arranged in upper and lower portions of the transferring path of the PS printing plate, the washing water is discharged toward the PS printing plate from the spray pipe and the developing solution is rinsed from the surface (both of the upper and lower surfaces) of the PS printing plate. 
     In this case, when jamming in a state that the PS printing plate is held between a pair of spray pipes, it is necessary to cut the PS printing plate by using a metal scissors or the like, in order to take out the PS printing plate. 
     In the PS printing plate processor, in order to prevent the state that the PS printing plate should be cut from being generated, the structure is made such that a pair of spray pipes arranged in the upper and lower portions of the transferring path of the PS printing plate are respectively mounted independently between a pair of side plates. Further, the structure is made such that the same flow amount of processing solution is supplied to a pair of spray pipes by independently mounting the upper and lower spray pipes so as to independently supply the processing solution. 
     However, in the case that a pair of spray pipes are independently mounted to the portion between a pair of side plates, it becomes complex to perform an operation of taking out the spray pipe. In particular, since the spray pipe is frequently provided in a narrow space between a pair of rollers for squeezing the washing water from the PS printing plate, at a time of taking out the lower spray pipe, it is necessary to insert hands to a narrow space between a pair of rollers so as to perform the operation after taking out the upper spray pipe, so that a maintenance is not easily performed. 
     &lt;&lt;Prior Art 5.&gt;&gt; 
     In the PS printing plate processor, for example, the structure is made such that the brush roller is provided within the developing tank and the surface of the PS printing plate is brushed by the brush roller, whereby removing the unnecessary photosensitive layer is promoted. Further, in the PS printing plate processor, the developing solution within the developing tank is recirculated, whereby the developing solution is stirred so that a concentration and a temperature of the developing solution become uniform. Accordingly, the finish quality of the PS printing plate is intended to be improved. 
     In this case, there is a case that dusts or grimes such as paper powders of PS-plated inserting paper to be processed or silicates contained in the photosensitive layer are mixed as a lump within the developing solution. When a solid material such as the dusts, the grimes, the lump of silicates or the like is mixed into the developing solution and attached to the surface of the PS printing plate, there is a case that the solid material prevents the developing process from being promoted and stays attached to the surface of the PS printing plate, thereby reducing the finish quality of the PS printing plate. 
     Accordingly, in the PS printing plate processor, the structure is made such that a filter is provided in the middle of the recirculating path so as to remove the solid material in the developing solution, at a time of recirculating the developing solution within the developing tank. 
     In this case, since the solid material in the developing solution is attached to the filter and a clogging is generated, it is necessary to frequently perform a maintenance such as cleaning or the like. 
     The filter mentioned above includes a filter formed in a cylindrical shape, and this filter is received in a cylindrical outer case. In order to take out the filter from the filter case corresponding to the outer case, it is necessary to take out a cap provided in an opening of the filter case and manually draw out the cylindrical filter (filter element) from an inner portion of the filter case. At this time, since the filter is pressed into the filter case, there is a case that it is not easy to take out the filter, so that it is desired to improve an operability at a time of taking out the filter. 
     SUMMARY OF THE INVENTION 
     The prevent invention has been made taking the facts mentioned above into consideration, and one object of the present invention is to provide a brush roller which prevents slack due to elongation of a web-like member, such as a woven wire cloth wound around a roller main body in a helical manner or the like, and prevents a gap between the web-like members due to torsional force, caused by contact pressure applied to the web-like members, from occurring. 
     Another object of the present invention is to provide a photosensitive material processing apparatus which prevents a contact portion of a boundary portion of the web-like member with the photosensitive material from appearing as a surface irregularity at a time of brushing the photosensitive material, such as a PS printing plate or the like, with the brush roller, which is formed by winding the web-like member such as the woven wire cloth or the like around the roller main body in a helical manner. 
     The other object of the present invention is to provide a mounting structure of a pair of rollers which can apply a desired nip force to a portion between the pair of rollers and enables easy attachment and detachment of the pair of rollers to and from a side plate or the like. 
     Further, another object of the present invention is to provide a spray pipe which can be easily maintained when a pair of spray pipes are provided at both sides of a transferring path of the photosensitive material such as the PS printing plate or the like. 
     Further, yet another object of the present invention is to provide a filter case which enables easy attachment and detachment of a filter. 
     In order to achieve the object mentioned above, in accordance with the present invention, there is provided a brush roller which has a rotational axis and is rotatable around the rotational axis for brushing a surface of a photosensitive material, the brush roller including: a cylindrical roller main body; a web-like member for brushing which is wound around an outer peripheral surface of the roller main body in a helical manner; a holding member provided at one end portion in an axial direction of the roller main body, which holding member holds one end portion of the web-like member and is rotatable with respect to the roller main body while holding the one end portion of the web-like member; and an urging element which urges the holding member to rotate to a side of a winding direction of the web-like member for reducing slack of the web-like member. 
     In accordance with the present invention, there is also provided a photosensitive material processing apparatus having a transferring path of a photosensitive material and a plurality of brush rollers each including a roller main body and a web-like member for brushing the photosensitive material, the web-like member being wound around an outer peripheral surface of the roller main body in a helical manner and the brush roller potentially forming a track pattern on the photosensitive material at a portion of the photosensitive material that is contacted by a portion of the brush roller corresponding to a boundary portion of the web-like member, wherein at least two of the brush rollers are disposed along the transferring path at one side of the transferring path, and the at least two brush rollers are provided such that a track pattern of one brush roller of the at least two brush rollers is different from a track pattern of another brush roller of the at least two brush rollers. 
     In accordance with the present invention, there is further provided a photosensitive material processing apparatus which performs a brushing treatment of a surface of a photosensitive material with a brush roller formed by helically winding and fixing a web-like member around an outer peripheral surface of a roller main body, said brush roller potentially forming a track pattern on said photosensitive material at a portion of said photosensitive material that is contacted by a portion of said brush roller corresponding to a boundary portion of said web-like member, wherein at least two of said brush roller are disposed along a transferring path of said photosensitive material, at one surface side of said transferring path, such that an angle of inclination of said track pattern of one of said at least two brush rollers with respect to a transferring direction of said photosensitive material is substantially the same as an angle of inclination of said track pattern of another of said at least two brush rollers with respect to said photosensitive material transferring direction, and overlapping of said track patterns is preventable by alteration of at least one of a rotational speed of said one brush roller relative to said other brush roller, a photosensitive material transferring speed, a distance between said one brush roller and said other brush roller along said transferring path, and a position with respect to said photosensitive material of an axial direction end portion of said boundary portion of said web-like member of said one brush roller relative to a position with respect to said photosensitive material of an axial direction end portion of said boundary portion of said web-like member of said other brush roller. 
     In accordance with the present invention, there is still further provided a roller pair mounting structure which provides gripping force for gripping a photosensitive material at a portion thereof disposed between a pair of rollers and holds the pair of rollers at a predetermined position of a side plate, the structure including: a first bearing which supports one of the rollers; a second bearing which supports another of the rollers; a base portion detachably mounted at a predetermined position of the side plate; a first bearing receiving portion provided at the base portion, which first bearing receiving portion receives the first bearing and holds the first bearing at a predetermined position; a second bearing receiving portion provided at the base portion, which second bearing receiving portion receives the second bearing such that the second bearing is movable toward and apart from the first bearing; a restricting member disposed at a side of the second bearing opposite to a side thereof at which the first bearing is disposed, which restricting member restricts movement of the second bearing apart from the first bearing and prevents removal of the second bearing from the second bearing receiving portion; and an urging and holding element provided at the restricting member, which urging and holding element provides a predetermined gripping force between the pair of rollers by urging the second bearing toward the first bearing. 
     In accordance with the present invention, there is yet further provided a spray pipe provided in a photosensitive material processing apparatus which processes a photosensitive material, which is transferred within the processing apparatus, with a processing liquid, the spray pipe discharging the processing liquid toward a surface of the photosensitive material, and the spray pipe including: a pair of pipes, each pipe of the pair of pipes being closed at one end side in a longitudinal direction thereof and having at least one through hole formed at an outer peripheral portion thereof, the through hole being capable of discharging the processing liquid; a holding member which mechanically connects respective the one end sides of the pair of pipes and holds the one end sides with a predetermined separation therebetween; a connecting holder which has a hollow inner portion which is fluid-communicated with the pair of pipes, and mechanically connects respective other end sides in the longitudinal directions of the pair of pipes and holds the other end sides with a predetermined separation therebetween; and a connecting element which has a connecting port communicated with the hollow inner portion of the connecting holder, the connecting port being detachably connected to a processing liquid supply pipe for supplying the processing liquid to the pair of pipes. 
     In accordance with the present invention, there is still further provided a filter case including: a substantially cylindrical outer case provided with an introduction pipe and a delivery pipe, and having an opening; a cap sealingly attached to the opening of the outer case; an inner tube provided at the cap and received in the outer case when the cap is attached thereto, through which inner tube a processing solution fed from the introduction pipe passes toward the delivery pipe; a filter element having a frame body which is formed in a substantially cylindrical shape and is capable of being received within the outer case, which frame body receives the inner tube when the inner tube is received in the outer case, and having a filter provided at a surface of the frame body, through which filter the processing solution flowing toward the delivery pipe passes when the inner tube is inserted into the frame body; a pawl portion provided at one of the frame body and the inner tube and protruding in a radial direction; and a hole portion provided at another of the frame body and the inner tube, which hole portion is entered by the pawl portion when the inner tube is inserted into the frame body, the filter element being held by an engagement operation of the hole portion and the pawl portion. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a schematic view of a whole of a PS printing plate processor in accordance with a first embodiment of the present invention; 
     FIG. 2 is a schematic perspective view showing a brush roller in accordance with the present embodiment; 
     FIGS. 3A to  3 D are flow views showing one embodiment of a manufacturing step of a web body; 
     FIG. 4 is an exploded perspective view showing one end side in an axial direction of the brush roller; 
     FIG. 5 is a schematic view showing a main portion of a roller main body; 
     FIG. 6A is a cross sectional view of a main portion of the roller main body showing a portion near a projection formed in the roller main body shown in FIG. 5; 
     FIG. 6B is a schematic cross sectional view obtained by cutting the roller main body along an axial direction; 
     FIG. 7 is a schematic perspective view of one end side in an axial direction of a brush roller employing a ratchet mechanism corresponding to one embodiment of restricting means; 
     FIG. 8 is a schematic view of a whole of a PS printing plate processor in accordance with a second embodiment of the present invention; 
     FIG. 9 is a schematic perspective view showing a brush roller in accordance with the present embodiment; 
     FIGS. 10A to  10 D are flow views showing one embodiment of a manufacturing step of a web body; 
     FIG. 11 is a schematic view of a surface of the PS printing plate showing one embodiment of a track on the PS printing plate of a boundary portion of the brush rollers; 
     FIG. 12 is a schematic view showing an arrangement of the brush roller in accordance with an embodiment example 1; 
     FIG. 13 is a schematic view showing one embodiment of the track by the boundary portion in accordance with the embodiment example 1; 
     FIG. 14 is a schematic view showing an arrangement of the brush roller in accordance with an embodiment example 2; 
     FIG. 15 is a schematic view showing one embodiment of the track by the boundary portion in accordance with the embodiment example 2; 
     FIG. 16 is a schematic view showing an arrangement of the brush roller in accordance with an embodiment example 3; 
     FIG. 17 is a schematic view showing an arrangement of the brush roller in accordance with an embodiment example 4; 
     FIG. 18 is a schematic view showing an arrangement of the brush roller in accordance with an embodiment example 5; 
     FIG. 19 is a schematic view showing an arrangement of the brush roller in accordance with a modified embodiment; 
     FIG. 20 is a schematic view showing one embodiment of the track by the boundary portion in accordance with the modified embodiment; 
     FIG. 21 is a schematic view of a whole of a PS printing plate processor in accordance with a third embodiment of the present invention; 
     FIG. 22 is a schematic exploded perspective view of one end side of a pair of transferring rollers showing an assembly of a rubber roller to a mounting base; 
     FIG. 23 is a schematic perspective view of one end side of a pair of transferring rollers showing a state of mounting the rubber roller to the mounting base; 
     FIG. 24 is a schematic perspective view of another end side of a pair of transferring rollers showing a summary of mounting a pair of rollers to a side plate; 
     FIG. 25 is a schematic view of a whole of a PS printing plate processor in accordance with a fourth embodiment of the present invention; 
     FIG. 26 is a perspective view showing a schematic structure of a spray unit; 
     FIG. 27 is a perspective view of a main portion showing a schematic structure of the spray unit in a side of a holding member; 
     FIG. 28 is a perspective view of a main portion showing a schematic structure of the spray unit in a side of a connecting holder as seen from the side of the holding member; 
     FIG. 29 is a perspective view of a main portion showing a schematic structure of the spray unit in a side of the connecting holder as seen from a different direction from FIG. 28; 
     FIG. 30 is a schematic cross sectional view showing an inner portion of the connecting holder; 
     FIG. 31 is a schematic view of a whole of a PS printing plate processor in accordance with a fifth embodiment of the present invention; 
     FIG. 32 is a schematic perspective view showing an outer appearance of a filter case; 
     FIG. 33 is a schematic perspective view of the filter case in a state that a cap is taken out, as seen from a different direction from FIG. 32; 
     FIG. 34 is a schematic perspective view showing a filter element and the cap; 
     FIG. 35 is a schematic view showing a state that the filter element is attached to the cap; and 
     FIG. 36 is a schematic perspective view as seen from a different direction from FIG. 35, showing the state that the filter element is attached to the cap. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     &lt;&lt;First Embodiment&gt;&gt; 
     A description will be given of a first embodiment in accordance with the present invention with reference to the accompanying drawings. FIG. 1 shows a schematic structure of a photosensitive surface printing plate processing apparatus (hereinafter, referred to as “PS printing plate processor  10 ”) applied as one embodiment of a photosensitive material processing apparatus. The PS printing plate processor  10  performs a developing process of a photosensitive surface printing plate (hereinafter, referred to as “PS printing plate  12 ”) such as a photo polymer plate corresponding to one of a photosensitive material image exposed by an exposing apparatus (not shown) or the like. In this case, the PS printing plate  12  is structured such that a photosensitive layer is formed in a supporting body constituted by a thin rectangular flat plate such as an aluminum plate or the like, and the photo polymer plate is structured such that a photo junction layer, a photo polymerization layer and an overcoat layer are overlapped with each other, whereby a photosensitive layer is formed, and an image is exposed by a laser beam, whereby a polymerizing reaction of an image portion of the photo polymerization layer is promoted. 
     In the PS printing plate processor  10 , there are arranged a developing portion  14  for processing the PS printing plate  12  by a developing solution, a water washing portion supplying a washing water of the PS printing plate  12  processed by the developing solution so as to wash, a desensitization processing portion  18  applying a gum solution to the PS printing plate  12  after being washed so as to perform a desensitization process, and a drying portion  20  drying the PS printing plate  12 . 
     A processing tank  22  is provided within the PS printing plate processor  10 . A developing tank  24  is formed at a position forming the developing portion  14  in the processing tank  22 , and a water washing tank  26  and a desensitization processing tank  28  are formed as a processing tank at a position forming the water washing portion  16  and the desensitization processing portion  18 . 
     A slit-like inserting port  32  is formed in an outer plate panel  30  covering the processing tank  22 , and a discharge port  34  is formed in a side of the drying portion  20  in the processing tank  22 . Further, an inserting port (a sub inserting port)  38  for reentry for inserting the PS printing plate to a portion between the developing portion  14  and the water washing portion  16  is provided in a cover  36  covering the processing tank  22 . The reentry inserting port  38  forms an inserting port of the PS printing plate  12  for performing the processes in the PS printing plate processor  10  except the process in the developing portion  14 . 
     An inserting table  40  is provided in an outer portion of the inserting port  32 , and a pair of transferring rollers  42  made of rubber are arranged in an inserting side of the PS printing plate  12  in the developing portion  14 . The PS printing plate  12  on which an image is exposed is mounted on the inserting table  40 , inserted from the inserting port  32  along a direction of an arrow A and fed to a portion between a pair of transferring rollers  42 . 
     A pair of transferring rollers  42  is rotated by a drive force given by drive means (not shown), takes in the inserted PS printing plate  12  and feeds to the developing portion  14  at an angle between about 15 degrees and 31 degrees with respect to a horizontal direction. 
     The developing tank  24  formed in the processing tank  22  is formed in a substantially angular shape in which a center of a bottom portion is protruded downward, and stores a developing solution for performing a developing process of the PS printing plate  12 . A guide plate  44  is arranged in a lower side along the transferring direction of the PS printing plate  12  in the developing tank  24  in such a manner as to be along the bottom portion. 
     The guide plate  44  is provided in an upstream portion (in a side of the inserting port  32 ) of the developing tank  24 , and a plurality of freely rotating rollers (small rollers)  46  are mounted thereto. The PS printing plate  12  fed within the developing portion  14  by a pair of transferring rollers  42  is transferred on the guide plate  44  while being guided by the rollers  46 . 
     A pair of rollers  48  each having a rubber outer periphery are arranged in a side of the water washing portion  16  in the developing tank  24 , and the PS printing plate  12  guided and transferred within the developing tank  24  so as to form a substantially U shape is gripped by a pair of transferring rollers  48  and taken out from the developing tank  24 . The PS printing plate  12  is dipped into the developing solution at a time of being transferred within the developing tank  24  in the manner mentioned above, and the unnecessary portion of the photosensitive layer exposed by the image exposure is swelled by the developing solution and peeled from the supporting body, whereby the unnecessary photosensitive layer is removed in correspondence to the exposed image. 
     In this case, a spray pipe  50  is provided within the developing tank  24 , whereby the developing solution within the developing tank  24  sucked by a pump (not shown) is sprayed onto the photosensitive layer surface of the PS printing plate  12 , the developing solution is supplied onto the surface of the PS printing plate  12 , and the developing solution within the developing tank  24  is circulated. 
     Further, a brush roller  80  is provided between the guide plate  44  and a pair of transferring rollers  48 , within the developing tank  24 . The brush roller  80  (details thereof will be mentioned below) rotates wire members while contacting them with the surface of the PS printing plate  12  transferred with being dipped into the developing solution, thereby brushing the surface of the PS printing plate  12  so as to promote removing of the unnecessary photosensitive layer from the surface of the PS printing plate  12 . 
     A liquid surface lid  52  is arranged in the developing portion  14  so that a lower surface thereof is below a liquid surface of the developing solution stored in the developing tank  24 . Further, in the wall surface of the developing tank  24  and the liquid surface lid  52 , shielding members  54 A and  54 B are provided in a side of the inserting port  32 , and shielding members  54 C and  54 D are mounted in a side of the water washing portion  24 . In the processing tank  22 , shielding members  54 E and  54 F are mounted in the periphery of the discharging port  34 , and a shielding member  54 G is mounted to the reentry inserting port  38  of the cover  36 . 
     The shielding members  54 A to  54 G are formed by a silicon rubber or the like, and an inner portion of the developing tank  24  is structured such that the liquid surface lid  52  having a great capacity and contacting with the liquid surface is provided in a space within a sealed portion formed by the shielding members  54 A to  54 G, a pair of transferring rollers  42  and  48  and the like so as to reduce an amount of air sealed within the space and prevent a fresh air from entering into a portion near the liquid surface of the developing solution by the liquid surface lid  52 , the shielding members  54 A to  54 G and the like, so that it is possible to prevent the developing solution from being deteriorated and a water content from being evaporated due to carbon dioxide gas in the air. In this case, in the liquid surface lid  52 , tandem rollers  52 A and  52 B are provided on lower surfaces of end portions in an upstream side and a downstream side in the transferring direction of the PS printing plate  12 , thereby preventing the surface (mainly the photosensitive surface) from being damaged by the PS printing plate  12  transferred within the developing portion  14  being contact with the lower surface of the liquid surface lid  52 . 
     The PS printing plate  12  drawn out from the developing tank  24  by a pair of transferring rollers  48  is fed to the water washing portion  16  by a pair of transferring rollers  48  while the developing solution attached to the surface thereof is squeezed down. 
     The transferring path for transferring the PS printing plate  12  in a substantially horizontal state by a pair of transferring rollers  58  and  60  arranged above the water washing tank  26  is formed in the water washing portion  16 , and the PS printing plate  12  is horizontally transferred above the water washing tank  26  while being gripped by a pair of transferring rollers  58  and  60 . 
     A pair of spray pipes  62 A and  62 B are provided in upper and lower portions of the transferring path of the PS printing plate  12  between a pair of transferring rollers  58  and  60  in the water washing portion  16 . The spray pipes  62 A and  62 B are arranged so that an axial direction thereof is along a width direction (a direction perpendicular to the transferring direction) of the PS printing plate  12 , and a plurality of discharging holes are formed so as to oppose to the transferring path of the PS printing plate  12 . 
     The water washing tank  26  stores a washing water corresponding to the processing solution. In the spray pipes  62 A and  62 B, the washing water supplied due to an operation of a solution supplying pump in synchronous with the transferring of the PS printing plate  12  is injected out toward the PS printing plate  12  from the discharging hole. In the PS printing plate  12 , the developing solution attached to the surface is washed away by the washing water. 
     The developing solution washed away by the washing water drops down to the water washing tank  26  together with the washing water. In this case, a fresh solution of the washing water is supplied to the water washing tank  26  by means (not shown) in correspondence to an amount of the PS printing plate  12  to be processed. 
     The PS printing plate  12  is fed out while being gripped by a pair of transferring rollers  60 , whereby the washing water supplied to the PS printing plate  12  is squeezed down from the front and back surfaces of the PS printing plate  12  together with the developing solution attached to the front and back surfaces of the PS printing plate  12  and recovered within the water washing tank  26 . In this case, an injecting direction of the washing water from the spray pipes  62 A and  62 B is set such that one of the spray pipe  62 A is an upstream side in the transferring direction of the PS printing plate  12  and one of the spray pipe  62 B is a downstream side in the transferring direction of the PS printing plate  12 , however, is not limited to this and the other directions may be employed. 
     In the desensitization processing portion  18 , a pair of transferring rollers  56  are provided above the desensitization processing tank  28 , and the PS printing plate  12  is transferred within the desensitization processing tank  18  by a pair of transferring rollers  56  and thereafter fed out from the discharging port  34 . 
     In the desensitization processing portion  18 , a spray pipe  64  is provided in an above side of the transferring path of the PS printing plate  12 . The spray pipe  64  is arranged so that an axial direction thereof is along the width direction of the PS printing plate  12 , and a plurality of discharging holes are formed so as to oppose to the transferring path of the PS printing plate  12 . Further, in the desensitization processing portion  18 , a discharging unit  66  in which slits are continuously formed along the width direction of the PS printing plate  12  is arranged below the transferring path of the PS printing plate  12 . 
     In the desensitization processing tank  28 , a gum solution used for protecting a plate surface of the PS printing plate  12  is stored, and the gum solution is supplied to the spray pipe  64  and the discharging unit  66  by a pump (not shown) operated in synchronous with the transferring operation of the PS printing plate  12 . The spray pipe  64  drops the gum solution toward the PS printing plate  12  so as to expand and apply onto the surface of the PS printing plate  12 . Further, the discharging unit  66  applies the gum solution discharged from the slits onto a whole surface in the back surface side of the PS printing plate  12  at a time when the back surface side of the PS printing plate  12  passes through while being contact with the slit portions. 
     In the PS printing plate  12 , a protecting film is formed by the gum solution applied to the front and back surface thereof. In this case, the discharging direction of the gum solution from the spray pipe  64  is not limited to the downward side in the transferring direction of the PS printing plate  12 , and may be set to the other directions. Further, the structure is made such that the discharging unit  66  is provided in a lower side of the transferring path of the PS printing plate  12  so as to apply the gum solution, however, the structure is not limited to this, and the structure may be made such that the spray pipe is provided so as to apply the gum solution. 
     The PS printing plate  12  to which the gum solution is applied in the desensitization processing portion  18  is gripped by a pair of transferring rollers  56 , is discharged from the discharging port  34  in a state that the gum solution slightly leaves on the front and back surfaces, and is fed to the drying portion  20 . 
     In the drying portion  20 , a supporting roller  68  for supporting the PS printing plate  12  is arranged near the discharging port  34 , and a pair of transferring rollers  72  and a pair of transferring rollers  74  are arranged in the center portion of the transferring path of the PS printing plate  12  within the drying portion  20  and near the discharging port  70 , whereby the PS printing plate  12  is transferred within the drying portion  20  by the supporting roller  68  and a pair of transferring rollers  72  and  74 . 
     Ducts  76 A and  76 B are arranged between the supporting roller  68  and a pair of transferring rollers  72  and between a transferring rollers  72  and a pair of transferring rollers  74  so as to form pairs with holding the transferring path of the PS printing plate  12  therebetween. The ducts  76 A and  76 B are arranged so that a longitudinal direction thereof is along the width direction of the PS printing plate  12 , and slit holes  78  are provided on a surface opposing to the transferring path of the PS printing plate  12 . 
     The ducts  76 A and  76 B are structured such that when a drying wind generated by drying wind generating means (not shown) is supplied from one end side in a longitudinal direction, the dusts  76 A and  76 B inject the drying wind toward the transferring path of the PS printing plate  12  from the slit holes  78  so as to blow to the PS printing plate  12 . Accordingly, in the PS printing plate  12 , the gum solution applied onto the front and back surfaces thereof is dried and the protecting film is formed. In this case, a shutter (not shown) separating the processor portion until the desensitization processing portion  18  processing the PS printing plate  12  by the processing solution from the drying portion  20  is provided in the discharging port  34 , thereby preventing the discharging port  34  from being unnecessarily opened so as to supply the heated air within the drying portion  20  to the desensitization processing portion  18 . 
     In the PS printing plate processor  10  structured in the manner mentioned above, when the PS printing plate  12  on which the image is recorded by the exposure apparatus (not shown) is mounted on the inserting table  40  and inserted to the inserting port  32 , the PS printing plate  12  is drawn by a pair of transferring rollers  42  so as to be fed to the developing portion  14 . In this case, in the PS printing plate processor  10 , the PS printing plate  12  passing through the inserting port  32  is detected by a sensor (not shown), a timer is started. This timer is used for operating the driving means for transferring the PS printing plate  12 , and for measuring a timing for discharging the washing water from the spray pipes  62 A and  62 B of the water washing portion  16  and a discharge timing of the gum solution in the desensitization processing portion  18 . 
     In the developing portion  14 , the PS printing plate  12  is fed by a pair of transferring rollers  42  at an inserting angle in a range between 15 degrees and 31 degrees with respect to the horizontal direction so as to be transferred while being dipped into the developing solution. Further, the PS printing plate  12  is fed out from the developing solution at a discharging angle in a range between 17 degrees and 31 degrees. The PS printing plate  12  is dipped into the developing solution in the developing portion  14 , whereby the unnecessary portion in the photosensitive layer is swelled in correspondence to the exposed image, and the swelled photosensitive layer is removed from the supporting body. At this time, the removing of the unnecessary photosensitive layer from the surface of the PS printing plate  12  is promoted by brushing the surface of the PS printing plate  12  by the brush roller  80  arranged within the developing tank  24 . 
     The PS printing plate  12  fed out from the developing solution after being applied to the process performed by the developing solution as mentioned above is drawn out by a pair of transferring rollers  48  so as to be transferred to the water washing portion  16 . At this time, a pair of transferring rollers  48  squeeze down the developing solution attached to the front and back surfaces of the PS printing plate  12  from the PS printing plate  12 . 
     In the water washing portion  16 , the washing water is injected out from the spray pipes  62 A and  62 B while the PS printing plate  12  is gripped by a pair of transferring rollers  58  and  60  so as to be transferred in a substantially horizontal state. Further, a pair of transferring rollers  60  arranged in the downstream side in the transferring direction of the PS printing plate  12  feed out the PS printing plate  12  to the desensitization processing portion  18  while squeezing down the washing water supplied to the front and back surfaces of the PS printing plate  12  together with the developing solution left without being squeezed by a pair of transferring rollers  48 . 
     Accordingly, in the PS printing plate  12 , the developing solution left on the front and back surfaces thereof is washed down at a time of passing through the water washing portion  16 . 
     The PS printing plate  12  fed to the desensitization processing portion  18  passes through a portion between the spray pipe  64  and the discharging unit  66  so as to be gripped by a pair of transferring rollers  56 , thereby being fed out from the desensitization processing portion  18  by a pair of transferring rollers  56 . 
     At this time, in the desensitization processing portion  18 , the gum solution is supplied to the spray pipe  64  and the discharging unit  66 , and the gum solution is applied onto the front and back surfaces of the PS printing plate  12 . A pair of transferring rollers  56  feed out the PS printing plate  12  while gripping it therebetween, thereby forming a thin film of the gum solution on the front and back surfaces of the PS printing plate  12 , and squeeze out the surplus gum solution from the front and back surfaces of the PS printing plate  12 . 
     The PS printing plate  12  to which the gum solution is applied is fed to the drying portion  20  from the discharging port  34  by a pair of transferring rollers  56 . In this case, the shutter (not shown) provided in the discharging port  34  operates at a timing of starting the process of the PS printing plate  12  or a timing that the PS printing plate  12  is fed out from the desensitization processing portion  18  so as to open the discharging port  34 , thereby preventing the drying wind in the drying portion  20  from unnecessarily entering into the desensitization processing portion  18  so that the gum solution is adhered to a pair of transferring rollers  56 . Further, the shutter prevents the developing solution from being deteriorated by the carbon dioxide gas in the air which enters from the discharging port  34  and reaches the developing portion  14 , and further prevents the water content in the developing solution, the washing water and the water content in the gum solution from being evaporated and going out from the discharging port  34 . 
     In the drying portion  20 , the drying wind is blown from the ducts  76 A and  76 B while the PS printing plate  20  is transferred by the supporting roller  68  and a pair of transferring rollers  72  and  74 . Accordingly, the protecting film is formed on the PS printing plate  12  by the applied gum solution and the PS printing plate  12  is discharged from the discharging port  70 . 
     As shown in FIG. 2, each of the brush rollers  80  is provided with a (hollow or solid) cylindrical roller main body  100 . The brush roller  80  is mounted so that the roller main body  100  is along the width direction (corresponding to the direction perpendicular to the transferring direction) of the PS printing plate  12  and opposes to the transferred PS printing plate  12  (refer to FIG.  1 ). 
     Axial end members  102  and  104  are provided in end portions in an axial direction of the roller main body  100 . The axial end members  102  and  104  are mounted in accordance with a way that small diameter portions  102 A and  104 A are press inserted to the roller main body  100  so as to be adhered thereto, or the like. 
     Rotary shafts  106  and  108  are protruded from the axial end members  102  and  104 , the brush roller  80  is structured such that the rotary shafts  106  and  108  are pivoted and mounted to a bearing (not shown), and the brush roller  80  is rotated by a driving force transmitted via the rotary shafts  106  or  108 . 
     The brush roller  80  is structured such that a web body for brushing  166  (hereinafter, simply referred to as web body  166 ) corresponding to the web-like member is wound around an outer peripheral portion of the roller main body  100  in a helical manner. 
     The web body  166 , for example, as shown in FIG. 3A, holds a pair of woven cloths  168  corresponding to a sheet-like base material in such a manner as to oppose to each other and weaves wire members  170  so as to extend over the woven cloths  168 . 
     For the wire members  170 , for example, a pile of natural fiber or artificial fiber is applied, however, a metal may be employed as far as having a suitable thinness. That is, as a material for the wire members  170  of the brush roller  80 , it is possible to employ a natural fiber such as a vegetable fiber, an animal fiber and the like, an artificial fiber such as a polyamide system including a nylon 6, a nylon 66, a nylon 6.10, a nylon 11 and the like, a polyester system including a polyethylene terephthalate, a polybutylene terephthalate and the like, a polyacrylic system including, a polyacrylonitrile, polyacrylic alkyl and the like, a polypropylene, a polystyrene and the like, and a metal fiber such as a stainless steel, a brass and the like. 
     As shown in FIG. 3B, the web body  166  is formed by weaving the wire materials  170  in the woven cloth  168  in a tensional state and thereafter cutting the wire members  170  at a middle portion thereof. The brush roller  80  is obtained by winding the web body  166  around a peripheral surface of the roller main body  100  in a helical manner (refer to FIGS. 2 and 3C) and shirring so as to uniformly make up a length of the wire members  170  (refer to FIG.  3 D). 
     As shown in FIG. 2, a fixing member  110  is provided in one axial end member  102 . The fixing member  110  has substantially the same diameter as that of the roller main body  100 , and the rotary shaft  106  is protruded from the fixing member  110 . 
     A flat surface portion  112  is formed in the fixing member  110  in a shape that a part of an outer peripheral portion thereof is cut. A restricting plate  114  opposes to the flat surface portion  112  and the restricting plate  114  is fixed by a screw  116 . 
     The web body  166  wound around the roller main body  100  is structured such that one end side is mounted on the flat surface portion  112  of the fixing member  110 , and the web body  166  is fixed to the fixing member  110  with being gripped between the flat surface portion  112  and the restricting plate  114  by fixing the restricting plate  114  mounted on one end side of the web body  166  to the fixing member  110  by the screw  116 . 
     The web body  166  is wound in a helical manner while being drawn in a direction of an arrow B along the peripheral surface of the roller main body  100  in a state that one end is fixed to the fixing member  110 . 
     On the other hand, an urging mechanism  122  constituted by a holding member  118  and a fastening member  120  is provided in another axial end member  104 . 
     As shown in FIG. 4, the holding member  118  is formed in a cylindrical block having the same diameter as that of the roller main body  110 . The rotary shaft  108  is inserted to an axial hole  124  formed in an axial core portion, whereby the holding member  118  is mounted to the roller main body  100  in such a manner as to freely rotate relatively. 
     A flat surface portion  126  is formed in the holding member  118  in a shape that a part of an outer peripheral portion is cut in a recessed manner. A restricting plate  128  is opposed to the flat surface portion  126 , and the restricting plate  128  is engaged with a screw hole  132  having a screw hole  130  formed in the flat surface portion  126 , thereby being fixed to the holding member  118 . 
     An end portion of the web body  166  wound around the roller main body  100  in a helical manner is mounted to the flat surface portion  126  of the holding member  118 , and is gripped between the flat surface portion  126  and the restricting plate  128  so as to be fixed to the holding member  118  by fixing the restricting plate  128  mounted on the end portion of the web body  166  to the holding member  118 . 
     In this case, at a time of fixing the web body  166  to the fixing member  110  and the holding member  118  by the restricting plates  114  and  128 , the wire members  170  may be woven in the woven cloth  168 , or the web body  166  may be formed by cutting the wire members  170  at both end of the web body  166  corresponding to an area opposing to the fixing member  110  and the holding member  118 , an area opposing at least to the restricting plates  114  and  128  in accordance with a shirring or the like, or previously weaving the wire members  170  except the area of the woven cloth  168 . 
     Further, at a time of winding the web body  166  around the roller main body  100 , the web body  166  may be temporarily fastened to the flat surface portions  112  and  126  by applying a slight amount of adhesive agent onto the back surface side of the web body  166  opposing to the flat surface portion  112  of the fixing member  110  and the flat surface portion  126  of the holding member  118  and having no wire members  170 , or the like. 
     The fastening member  120  is formed in a block shape, and an axial hole  134  to which the rotary shaft  108  is inserted is formed in a center portion thereof. Further, a plurality of screw holes  136  extending to the axial hole  134  from the outer peripheral portion are formed in the fastening member  120 . A lock screw  138  such as a square screw or the like is engaged with each of the screw holes  136 . 
     The fastening member  120  is fixed to the axial end member  104  by screwing the rotary shaft  108  by a plurality of lock screws  138  engaged with the screw holes  136  in a state that the rotary shaft  108  is inserted to the axial hole  134 . 
     The urging mechanism  122  is mounted to the rotary shaft  108  of the axial end member  104  so that the holding member  118  becomes in a side of the roller main body  100 . At this time, the fastening member  120  is fixed to the rotary shaft  108 , whereby the holding member  118  can relatively rotate between the flange portion  104 B of the axial end member  104  and the fastening member  120 . 
     In the fastening member  120 , a recess portion  140  is formed on a surface in a side of the holding member  118 . A torsional coil spring  142  used as the urging means is received within the recess portion  140 . Further, in the fastening member  120 , an engaging hole  144  is formed on a bottom surface within the recess portion  140  as seen from a side of the holding member  118 . 
     One end portion  142 A of the torsional coil spring  142  received within the recess portion  140  of the fastening member  120  is inserted to the engaging hole  144 . Accordingly, the torsional coil spring  142  is engaged with the fastening member  120 . 
     In the holding member  118 , an engaging hole  146  is formed on an end surface in a side of the fastening member  120 , and another end portion  142 B of the torsional coil spring  142  is inserted to the engaging hole  146 . Accordingly, the holding member  118  is engaged with the fastening member  120  via the torsional coil spring  142  received within the recess portion  140  of the fastening member  120 , and is urged toward a winding direction side of the web body  166  due to an urging force of the torsional coil spring  142 . 
     Further, a restricting pin  148  is protruded in the fasting member  120  from an end surface in the side of the holding member  118 , for serving as restricting means. The restricting pin  148  is protruded to a space formed above the flat surface portion  126  and is structured such as to be brought into contact with the flat surface portion  126  of the holding member  118  by relatively rotating the holding member  118  and the fastening member  120 . 
     Accordingly, the holding member  118  can relatively rotate with respect to the fastening member  120  within a range that the restricting pin  148  is apart from the fiat surface portion  126 . That is, the restricting pin  148  restricts a relative rotation range of the holding member  118  with respect to the fastening member  120  and the roller main body  100 . In this case, the restricting plate  128  fixed to the flat surface portion  126  has a position and a size at which the restricting plate  128  is not in contact with the restricting pin  148 . 
     The brush roller  80  is structured such that the web body  166  is wound around the roller main body  100  in a helical manner and the front end of the web body  166  is fixed to the holding member  118 . In this state, the restricting pin  148  is brought into contact with the flat surface portion  126  of the holding member  118  by rotating the fastening member  120  in a winding direction of the web body  166 , whereby the holding member  118  is rotated in the winding direction of the web body  166 . 
     Accordingly, the web body  166  fixed to the holding member  118  is drawn in the winding direction to the roller main body  100 , and the web body  166  is wound around the roller main body  100  in a tensioned state. At this time, the torsional coil spring  142  applies a predetermined tensile force to the web body  166  wound around the roller main body  100  by urging the holding member  118  in the winding direction of the web body  166 , whereby the web body  166  wound around the roller main body  100  keeps the tensional state due to the tensile force. 
     In this case, when an elongation is generated in the web body  166  by using the brush roller  80  for a long time period or the like, the holding member  118  is rotated in the winding direction of the web body  166  due to the urging force of the torsional coil spring  142 . Further, when the web body  166  tends to compress against the urging force of the torsional coil spring  142  and accordingly the holding member  118  relatively rotates in a direction opposite to the winding direction at a certain degree, the restricting pin  148  is brought into contact with the flat surface portion  126  of the holding member  118  so as to prevent the holding member  118  from relatively rotating in the direction opposite to the winding direction of the web body  166 . 
     On the other hand, as shown in FIG. 5, a plurality of projections  150  are formed on a peripheral surface of the roller main body  100 . The projections  150  are formed, for example, by striking the peripheral surface of the roller main body  100  by a punch having a predetermined shape or the like so as to make a front end of the punch or the like bite into the peripheral surface of the roller main body  100  toward a direction (a direction of an arrow C) inverse to the winding direction of the web body  166 , thereby projecting upward. At this time, as shown in FIG. 6A, fine recesses having a crater shape are formed in the side of the winding direction of the projection  150 . Accordingly, the projection  150  is formed so that the upper end is directed to the winding direction of the web body  166  and a surface opposite to the fine recess having the crater shape becomes comparatively smooth. 
     When tightly winding the web body  166  around the roller main body  100  having the projections  150  formed so as to be closely attached to the peripheral surface thereof, it is possible to easily move the woven cloth  168  (the web body  166 ) in the winding direction, and the structure is made such that when the woven cloth  168  (the web body  166 ) tends to be shifted in the direction opposite to the winding direction with respect to the roller main body  100 , the projection  150  eats into the woven cloth  168  of the web body  166 , whereby a contact resistance becomes great. 
     Accordingly, the web body  166  can move in the winding direction, however, when the movement is going to be generated in a slacking direction corresponding to a direction opposite to the winding direction, the projection  150  engaged so as to eat into the woven cloth  168  prevents the web body  166  from being shifted. 
     As shown in FIG. 5, the projection  150  is formed on the peripheral surface of the roller main body  100  at a helical position along the winding direction of the web body  166 . At this time, as shown in FIG. 6B, the projection  150  is formed on the peripheral surface of the roller main body  100  so that an angle formed between the projection  150  and the adjacent projection  150  along the winding direction becomes a predetermined angle θ (for example, 90 degrees). 
     Accordingly, as shown in FIG. 5, the structure is made such that an interval between the adjacent projections  150  along the axial direction of the roller main body  100  becomes a predetermined interval d, whereby a plurality of projections  150  are not formed on the same circumference crossing the axial direction of the roller main body  100 . In this case, the angle θ (refer to FIG. 6B) can be optionally set, for example, in a range between 5 degrees and 180 degrees, and preferably in a range between 15 degrees and 90 degrees. 
     A description will be given below of an operation of the present embodiment. 
     The brush roller  80  is constituted by winding the web body  166  formed by weaving the wire members  170  in the woven cloth  168  around the peripheral surface of the roller main body  100  in a helical manner. At this time, one end side of the web body  166  is fixed by the fixing member  110  and another end side is fixed to the holding member  118 . The holding member  118  forms the urging mechanism  122  together with the fastening member  120 , and is urged to the side of the winding direction (the direction of the arrow B) of the web body  166  by the torsional coil spring  142  provided between the holding member  118  and the fastening member  120 . 
     In general, the web body  166  (the woven cloth  168 ) slightly generates an elongation when being dipped into the developing solution or the like. In the brush roller  80 , since the web body  166  is not bonded to the roller main body  100  by the adhesive agent, a slack is easily generated in the web body  166  due to the elongation. 
     At this time, in the brush roller  80 , the web body  166  is always drawn in the winding direction due to the urging force of the torsional coil spring  142 . Accordingly, even when the elongation is generated in the web body due to some reasons, the elongation does not appear as a slack of the web body  166  wound around the roller main body  100 . 
     That is, the urging mechanism  122  provided in the brush roller  80  urges the holding member  118  to which the end portion of the web body  166  is fixed, in the winding direction of the web body  166  due to the urging force of the torsional coil spring  142 , and when the elongation is generated in the web body  166 , the holding member  118  rotates in the winding direction of the web body  166  due to the urging force of the torsional coil spring  142 , thereby preventing the slack from being generated in the web body  166  wound around the roller main body  100 . 
     Further, the restricting pin  148  is provided in the fastening member  120  constituting the urging mechanism  122  together with the holding member  118 , and the restricting pin  148  is brought into contact with the flat surface portion  112  of the holding member  118 , thereby restricting the relative rotation of the holding member  118  with respect to the fastening member  120 . 
     Accordingly, even when the web body  166  is going to draw the holding member  118  in the direction opposite to the winding direction against the urging force of the torsional coil spring  142 , the restricting pin  148  is brought into contact with the flat surface portion  112  of the holding member  118  so as to restrict the relative rotation of the holding member  118  in the direction opposite to the winding direction. Accordingly, the web body  166  draws the holding member  118  in the direction opposite to the winding direction, whereby no slack is generated in the web body  166 . 
     As mentioned above, in the brush roller  80 , both end portions of the web body  166  wound around the roller main body  100  in a helical manner are fixed by the fixing member  110  and the holding member  118  of the urging mechanism  122 , thereby preventing the slack from being generated in the web body  166  without bonding the web body  166  to the roller main body  100  by the adhesive agent. 
     On the other hand, the fine projections  150  are formed on the peripheral surface of the roller main body  100  around which the web body  166  is wound with an interval at a position forming a helical shape. The projection  150  is structured such that the front end is directed to the winding direction of the web body  166 , and when the woven cloth  168  of the web body  166  wound around the roller main body  100  in a helical manner is going to be shifted in the winding direction, the web body  166  can be shifted, however, when it is going to be shifted in the direction opposite to the winding direction, the projection  150  eats into the woven cloth  168  of the web body  166  so as to increase a frictional resistance, thereby preventing the web body  166  from being shifted. 
     Accordingly, when the urging mechanism  122  prevents the slack due to the elongation of the web body  166 , the web body  166  is shifted in the winding direction, and a uniform tensile force is applied to all the area of the web body  166  wound around the roller main body  100 . On the other hand, when the torsional force is applied to the web body  166  wound around the roller main body  100  at a time of brushing the PS printing plate  12 , the projections  150  eat into the web body  166 , thereby preventing the web body  166  from being shifted in the direction opposite to the winding direction. 
     Accordingly, in the brush roller  80 , it is securely prevent a partial slack from being generated in the web body  166  due to the winding tightness of the web body  166  wound around the roller main body  100 . 
     On the other hand, the projections  150  are formed so as to be shifted at a predetermined angle θ along the peripheral direction of the roller main body  100  between the adjacent projections  150  at a time of being formed at helical positions in the roller main body  100 , whereby a plurality of projections  150  do not appear on the same circumference of the roller main body  100 . That is, the structure is made such that a plurality of projections  150  do not exist on the same circumference of the roller main body  100  and the interval between the adjacent projections  150  along the axial direction becomes a predetermined interval d. Accordingly, the peripheral surface of the roller main body  100  is formed, for example, in a coarse-grained rubbing metal. 
     In the case that a plurality of projections  150  exist on the same circumference of the roller main body  100 , a plurality of projections  150  rub down the same position at a time of brushing the PS printing plate  12  by the brush roller  80 , so that a stripe-shaped rubbed surface irregularity is easily generated along the transferring direction of the PS printing plate  12 , however, in the brush roller  80 , since the less than one projection  150  is formed on the same circumference of the roller main body  100 , the rubbed surface irregularity due to the projections  150  does not appear on the surface of the PS printing plate  12 . 
     In order to prevent the web body  166  wound around the roller main body  100  from being shifted, a method of increasing a frictional resistance between the peripheral surface of the roller main body  100  and the web body  166  includes a method of applying a knurling work onto the peripheral surface of the roller main body  100 , however, in the case of partly applying the knurling work onto the peripheral surface of the roller main body  100 , a plurality of convex portions are arranged on the same circumference of the roller main body  100  and the rubbed surface irregularity is generated on the surface of the PS printing plate  12  even when a difference between concave and convex is about 0.3 mm. 
     Further, applying the knurling work onto a whole surface of the outer periphery of the roller main body  100  generates a vibration or the like in the brush roller  80  due to reduction of circulaity of the roller main body  100  or the like. 
     On the other hand, by forming the projections  150  at the helical positions on the peripheral surface of the roller main body  100 , it is possible to securely prevent the web body  166  wound around the roller main body  100  in a helical manner from being shifted, particularly, prevent the web body  166  from being shifted in the direction opposite to the winding direction, without generating vibration in the brush roller  80 . 
     Accordingly, in the PS printing plate processor  10 , by brushing the surface of the PS printing plate  12  by the brush roller  80 , it is possible to securely remove the unnecessary photosensitive layer or the like without generating a finish defect such as the rubbed surface irregularity or the like on the surface of the PS printing plate  12 . 
     Further, the present embodiment does not limit the structure of the present invention. In the present embodiment, the fixing member  110  is provided in one end in the axial direction of the roller main body  100  and the urging mechanism  122  is provided in another end thereof, however, the structure may be made such that the urging mechanisms  122  are provided in both ends in the axial direction of the roller main body  100  and the respective urging mechanisms  122  urge both end portions of the web body  166  in the direction of wining around the roller main body  100 . 
     Further, in the present embodiment, the restricting pin  148  provided in the fastening member  120  prevents the holding member  118  from relatively rotating in the direction opposite to the winding direction of the web body  166 , however, the structure of the restricting means is not limited to this. For example, the structure may be made such that a one-way clutch mechanism is provided between the holding member  118  and the fastening member  120  or the axial end member  104  so as to prevent the holding member  118  from relatively rotating in one direction, or a ratchet mechanism may be employed in place of the one-way clutch mechanism. 
     A ratchet mechanism  180  shown in FIG. 7 is constituted by a ratchet gear  182  formed in the flange portion  104 B of the axial end member  104  and a ratchet gear  184  formed on an end surface in a side of the axial end member  104  of the holding member  118  opposing to the ratchet gear  182 . 
     The holding member  118  is urged toward the axial end member  104  due to the urging force of the urging means (not shown), whereby the ratchet gears  182  and  184  are engaged with each other. 
     The ratchet mechanism  180  prevents the holding member  118  from relatively rotating in the direction opposite to the winding direction of the web body  166  with respect to the axial end member  104  by the ratchet gears  182  and  184  being relatively engaged with each other. 
     Further, the ratchet mechanism  180  is structured such that the holding member  118  can relatively rotate in the winding direction with respect to the axial end member  104 , and when the elongation is generated in the web body  166  and the holding member  118  relatively rotates due to the urging force of the torsional coil spring  142 , the engaging position of the ratchet gears  182  and  184  moves. 
     By using the ratchet mechanism  180  mentioned above, it is possible to securely prevent the slack from being generated due to the elongation of the web body  166  or the like while preventing the slack of the web body  166  due to the rotation of the holding member  118  in the direction opposite to the winding direction. 
     In this case, the ratchet gears  182  and  184  may be provided between the holding member  118  and the fastening member  120 . Further, one of the ratchet gears  182  and  184  may be replaced by a ratchet pawl. Further, the ratchet mechanism corresponding to the restricting means is not limited to this, and an optional structure can be employed as far as the structure enabling the holding member  118  to relatively rotate in the winding direction between the holding member  118  and any one of the axial end member  104 , the rotary shaft  108  and the fastening member  120  and preventing the relative rotation in the direction opposite to the winding direction. 
     Here, in the present embodiment, the description is given of the present invention with reference to the embodiment of the brush roller  80  provided in the PS printing plate processor  10 , however, the brush roller employing the present invention is not limited to the PS printing plate such as a photo polymer plate, a thermal plate, a surface printing plate with no water and the like, and when a brush roller is used for brushing a surface of a photosensitive material in a photosensitive material processing apparatus for processing the other photosensitive material such as an X-ray film, a general black-and-white film, a color film, a black-and-white printing paper, a color printing paper and the like, the present invention can be applied to the brush roller. 
     That is, the present invention can be applied to the brush roller in the optionally structured photosensitive material processing apparatus without being limited to the PS printing plate processor. 
     As mentioned above, the present invention can securely prevent the web-like member from being slacked even when the elongation or the like is generated in the web-like member wound around the roller main body in a helical manner. Further, in accordance with the present invention, the shift in the direction opposite to the winding direction is prevented from being generated in the web-like member by forming the projection at the helical position on the peripheral surface of the roller main body, whereby it is possible to securely prevent a partly winding tightness or slack from being generated due to the shifting of the web-like member. 
     Therefore, in accordance with the present invention, there can be obtained an excellent effect that it is possible to securely prevent the rubbed surface irregularity or the like from being generated on the photosensitive material due to the slack or wind tightness of the web-like member wound around the roller main body in a helical manner. 
     &lt;&lt;Second Embodiment&gt;&gt; 
     A description will be given below of a second embodiment. With respect to the same elements and parts as those of the embodiment mentioned above, an overlapping description will be optionally omitted and a description will be mainly given of characteristic portions. 
     With reference to FIG. 8, in the PS printing plate processor  10 , the brush roller  80  and  82  are provided within the developing tank  24 . The brush roller  80  and  82  are arranged along the transferring path of the PS printing plate  12 , and respectively opposed to the surface of the photosensitive layer side of the PS printing plate  12 . Accordingly, in the PS printing plate  12  transferred in the developing solution within the developing tank  24 , the surface in the photosensitive layer side is brushed by the brush rollers  80  and  82 , whereby the photosensitive layer swelled by the developing solution is promoted to be peeled. 
     In this case, a description will be given of the brush rollers  80  and  82  provided in the PS printing plate processor  10  with reference to FIG.  9  and FIGS. 10A to  10 D. In this case, the basic structures of the brush rollers  80  and  82  are the same. 
     As shown in FIG. 9, the brush roller  80  is constituted by the roller main body  100  corresponding to a core material, and a web body for brushing  166  (hereinafter, simply refer to the web body  166 ) corresponding to the web-like member wound around the outer peripheral portion of the roller main body  100 . 
     The web body  166 , as shown in FIG. 10A, holds a pair of woven cloths  168  corresponding to a sheet-like base material in such a manner as to oppose to each other and weaves wire members  170  so as to extend over the woven cloths  168 . 
     For the wire members  170 , for example, a natural fiber or an artificial fiber is applied. In this case, the wire members  170  are not limited to the natural fiber and the artificial fiber, and a metal may be employed as far as having a suitable thinness. That is, as a material for the wire members  170 , it is possible to employ a natural fiber such as a vegetable fiber, an animal fiber and the like, an artificial fiber such as a polyamide system including a nylon 6, a nylon 66, a nylon 6.10, a nylon 11 and the like, a polyester system including a polyethylene terephthalate, a polybutylene terephthalate and the like, a polyacrylic system including, a polyacrylonitrile, polyacrylic alkyl and the like, a polypropylene, a polystyrene and the like, and a metal fiber such as a stainless steel, a brass and the like. 
     In this case, the web body  166  (FIG. 10B) applied to the present embodiment is completed by weaving the wire materials  170  in the woven cloth  168  in a tensional state and thereafter cutting the wire members  170  at a middle portion thereof. The brush roller  80  is obtained by winding the web body  166  around a peripheral surface of the roller main body  164  in a helical manner (refer to FIG. 10C) and shirring so as to uniformly make up a length of the wire members  170  (refer to FIG.  10 D). 
     As shown in FIG. 9, the brush roller  80  fixes the woven cloth  168  corresponding to the base material of the web body  166  to both end portions of the roller main body  100 , for example, by winding a fastening band  172  from the above of the web body  166  wound in both end portions of the roller main body  100 . 
     In this case, when fixing the web body  166  to the roller main body  100  by the fastening band  172 , the web body  166  may be fixed by being fastened by the fastening band  172  in a state of weaving the wire members  170  in the woven cloth  168 . However, as shown in FIG. 9, the web body  166  may be formed by cutting the wire members  170  in a predetermined area at both end portions of the web body  166  opposing to the fastening band  172  in accordance with a shining or the like or previously forming the woven cloth  168  without weaving the wire members  170  in the area opposing to both end portions of the roller main body  100 . 
     Further, when fixing the web body  166  at the end portion of the roller main body  100  by using the fastening band  172 , it is preferable to perform the fixing operation in a state of temporarily fixing the woven cloth  168  to the roller main body  100  by applying a slight amount of adhesive agent to the back surface side of the woven cloth  168  opposing to the peripheral surface of the axial end portion of the roller main body  100 . 
     Further, as the brush rollers  80  and  82 , it is possible to employ a structure obtained by fixing the web body  166  to the roller main body  100  by using optional fixing means in addition to the fastening band  172 . Further, the brush roller  80  and  82  may be structured such as to be fixed by applying the adhesive agent or the like to the back surface side of the woven cloth  168  opposing to the peripheral surface of the roller main body  100  so as to bond to the roller main body  100 , that is, the brush rollers  80  and  82  may be structured as far as the web body  166  is tightly wound around the roller main body  100  in a helical shape. 
     On the other hand, as shown in FIG. 11, in the brush rollers  80  and  82  formed by winding the web body  166  around the roller main body  100  in a helical manner, a boundary portion (hereinafter, referred to as “boundary portion  90 ”) between the adjacent web bodies  166  along the axial direction of the roller main body  100  is formed in a helical shape along the peripheral surface of the roller main body  100 . 
     The boundary portion  90  of the web body  166  moves toward the downward side in the transferring direction of the PS printing plate  12  on the surface of the PS printing plate  12  while opposing to the surface of the PS printing plate  12  at a time of brushing the PS printing plate  12  by the brush rollers  80  and  82 . Accordingly, as shown by a two-dot chain line in FIG. 11, a track  92  formed by an opposition of the boundary portion  90  on the surface of the PS printing plate  12  becomes an inclined stripe. 
     An angle θ of the track with respect to the transferring direction (the direction of an arrow A) of the PS printing plate  12  becomes 0 degrees (θ=0°) at a time of transferring the PS printing plate  12  without rotating the brush roller  80  and  82 , and becomes substantially 90 degrees (θ=90°) at a time of stopping transferring the PS printing plate  12  and rotating the brush rollers  80  and  82 . 
     Further, an interval between the tracks  92  along the width direction of the PS printing plate  12  becomes a value corresponding to a width W of the web body  166  and a winding angle of the web body  166  around the roller main body  100  (X=f (W)). That is, the track  92  has the interval X corresponding to the width W of the web body  166  and the angle θ corresponding to a transferring speed V of the PS printing plate  12 , an outer diameter D of the brush roller  80  ( 82 ) and a rotational speed N thereof. 
     On the other hand, in this boundary portion  90 , since a density of the wire members  170  becomes smaller (lower) than that of the peripheral portion, the track  92  easily appears as the rubbed surface irregularity on the surface of the PS printing plate  12  at a time of brushing the surface of the PS printing plate  12  by the brush rollers  80  and  82 . In particular, in the case that it is necessary to brush at a higher contact pressure of the wire members  170  against the printed surface, such in the photo polymer plate, the track  92  appears as the rubbed surface irregularity on the PS printing plate  12 , thereby tending to reduce a finish quality of the PS printing plate  12  processed by the PS printing plate processor  10 . 
     Here, in the PS printing plate processor  10 , two brush rollers  80  and  82  are arranged in the side of the photosensitive layer of the PS printing plate  12  along the transferring path of the PS printing plate  12  and the surface of the photosensitive layer side of the PS printing plate  12  is brushed by the brush rollers  80  and  82 , thereby promoting a removal of the unnecessary photosensitive layer from the surface of the PS printing plate  12 , and canceling the respective tracks  92  between the brush rollers  80  and  82 , so that it is intended to prevent the rubbed surface irregularity generated by the boundary portion  90  from appearing on the surface of the PS printing plate  12 . 
     A description will be given of a structure in which a rubbed surface irregularity is prevented from appearing on the surface of the PS printing plate  12  by canceling the respective tracks  92  by two brush rollers  80  and  82  with reference to the following embodiment examples 1 to 5. 
     EMBODIMENT EXAMPLE 1 
     FIG. 12 shows an arrangement of the brush rollers  80  and  82  applied to an embodiment example 1. In the embodiment example 1, brush rollers  84  having the same shape and in which the web body  166  having a width W is wound around the roller main body  164  in a helical manner are employed as the brush rollers  80  and  82 . Accordingly, in the brush rollers  80  and  82 , a boundary portion  90  is formed in a helical manner at the interval W. 
     In the developing portion  14 , two brush rollers  84  ( 80  and  82 ) are rotated in the same direction (for example, in a direction of an arrow C) at a time of transferring the PS printing plate  12  at a speed V (mm/min). At this time, in the embodiment example 1, the rotational speed N is changed between two brush rollers  84 . 
     For example, while the structure is made such that the brush roller  84  used as the brush roller  80  is rotated at a rotational speed N1 (r/min), the brush roller  84  used as the brush roller  82  is rotated at a rotational speed N2 larger than the rotational speed N 1  (N 1 &lt;N 2 ). In this case, the rotational speed N can be changed by using an optional method, for example, changing a gear ratio for transmitting a drive force. 
     In the developing portion  14  using the brush rollers  80  and  82 , the photosensitive layer surface of the PS printing plate  12  is brushed by the brush roller  80  and next brushed by the brush roller  82 . 
     In this case, as shown in FIG. 13, on the assumption that the track  92  structured such that a boundary portion  90 A of the brush roller  80  opposes to the surface of the PS printing plate  12  is set to a track  92 A, and the track structured such that a boundary portion  90 B of the brush roller  82  opposes to the surface of the PS printing plate  12  is set to a track  92 B, since the width W of the web body  166  is the same between the brush rollers  80  and  82 , the track  92 A and the track  92 B respectively have the interval X. 
     On the other hand, in the brush rollers  80  and  82 , the rotational directions are the same but the rotational speeds N are different. Accordingly, an angle θ 1  of the track  92 A and an angle θ 2  of the track  92 B are different. Accordingly, the brush rollers  80  and  82  form different track patterns on the surface of the PS printing plate  12 . 
     At this time, since the rotational speed N 2  of the brush roller  82  is greater than the rotational speed N 1  of the brush roller  80  (N 1 &lt;N 2 ), the angle θ 1  of the track  92 A becomes smaller than the angle θ 2  of the track  92 B (θ 1 &lt;θ 2 ). Accordingly, the tracks  92 A and  92 B do not cross and overlap with each other on the PS printing plate  12 . 
     Accordingly, it is possible to prevent the rubbed surface irregularity from appearing on the PS printing plate  12  due to the overlap between the track  92 A formed by the brush roller  80  and the track  92 B formed by the brush roller  82  on the PS printing plate  12 , and it is possible to brush so as to cancel the mutual tracks  92 A and  92 B by the brush roller  80  and  82 . 
     In this case, the difference between the rotational speeds N 1  and N 2  of the brush rollers  80  and  82  can be optionally set, however, a larger one is preferable. By increasing the difference between the rotational speeds N 1  and N 2 , the difference between the angle θ 1  of the track  92 A and the angle θ 2  of the track  92 B is increased, so that it is possible to more securely prevent the rubbed surface irregularity from appearing (coming into prominence). 
     Further, in the embodiment example 1, the rotational speed N 2  of the brush roller  82  is made larger than the rotational speed N 1  of the brush roller  80  (N 1 &lt;N 2 ), however, the rotational speed N 1  of the brush roller  80  may be made larger than the rotational speed N 2  of the brush roller  82  (N 1 &gt;N 2 ). 
     EMBODIMENT EXAMPLE 2 
     FIG. 14 shows an arrangement of the brush rollers  80  and  82  applied to an embodiment example 2. In this embodiment example 2, the brush rollers  84  are employed for the brush rollers  80  and  82 , further while the rotational speed N is changed between the brush rollers  80  and  82  in the embodiment example 1, the rotational direction is changed between the brush rollers  80  and  82  in the embodiment example 2. 
     That is, in the embodiment example 2, when the brush rollers  84  used as the brush rollers  80  and  82  are rotated at the rotational speed N, the brush roller  84  used as the brush roller  82  is rotated in a direction of an arrow C and on the other hand, the brush roller  84  used as the brush roller  80  is rotated in a direction of an arrow E corresponding to an opposite direction to the direction of the arrow C. In this case, the rotational direction between two brush rollers  84  is changed by using an optional method of changing a gear number at a time of transmitting the drive force or the like. 
     Accordingly, as shown in FIG. 15, on the assumption that the track  92  in which the boundary portion  90  of the brush roller  80  opposes to the surface of the PS printing plate  12  is set to a track  92 D and the track in which the boundary portion  90  of the brush roller  82  opposes to the surface of the PS printing plate is set to a track  92 C, between the brush rollers  80  and  82 , since the width W of the web body  166  is constant, the respective intervals X are the same between the track  92 C and the track  92 D. 
     On the other hand, in the brush rollers  80  and  82 , the rotational directions are different. Accordingly, the directions of incline are different between the track  92 C and  92 D. That is, the track  92 C formed by the brush roller  82  is inclined rightward with respect to the transferring direction of the PS printing plate  12  at an angle θ 3 , on the other hand, the track  92 D formed by the brush roller  80  is inclined leftward with respect to the transferring direction of the PS printing plate  12  at an angle θ 4 . Accordingly, the brush rollers  80  and  82  form the different track patterns on the surface of the PS printing plate  12 . 
     At this time, the tracks  92 C and  92 D do not overlap with each other on the PS printing plate  12 . 
     Accordingly, it is possible to prevent the rubbed surface irregularity from appearing on the PS printing plate  12  due to the overlapping on the PS printing plate  12  between the track  92 D formed by the brush roller  80  and the track  92 C formed by the brush roller  82 , whereby it is possible to brush so as to cancel the respective tracks  92  ( 92 D and  92 C) by the brush rollers  80  and  82 . 
     In this case, it is sufficient that the rotational directions of the brush rollers  80  and  82  are different from each other, and are not limited to the present embodiment. 
     EMBODIMENT EXAMPLE 3 
     FIG. 16 shows an arrangement of the brush rollers  80  and  82  applied to the embodiment example 3. In the embodiment example 3, the brush roller  84  is used as the brush roller  82  and a brush roller  86  is used as the brush roller  80 . 
     The brush roller  86  is structured such that the winding direction of the web body  166  around the roller main body  164  is changed with respect to that of the brush roller  84 . That is, the brush roller  84  is structured such that the web body  166  is wound around the roller main body  100  in a counterclockwise direction as seen from a right side of the paper surface of FIG. 16, and on the other hand, the brush roller  86  is structured such that the web body  166  is wound in a clockwise direction as seen from a right side of the paper surface of FIG.  16 . 
     Accordingly, in the brush roller  86 , a boundary portion  90 C formed in a helical shape in an opposite direction to that of the boundary portion  90 A of the brush roller  84  is provided. 
     As mentioned above, in the embodiment example 3, the winding directions of the web body  166  are changed between two brush rollers  80  and  82 . 
     In the developing portion  14  using the brush rollers  80  ( 86 ) and  82  ( 84 ) structured in the manner mentioned above, the brush rollers  80  and  82  are rotated in the same direction (for example, in the direction of the arrow C) at the substantially same rotational speed N while the PS printing plate  12  is transferred at a transferring speed V, and the photosensitive layer surface of the PS printing plate  12  is at first brushed by the brush roller  80  and next, brushed by the brushing roller  82 . 
     Accordingly, the pattern of the track similar to the embodiment example 2 can be obtained on the surface of the PS printing plate  12  (refer to FIG.  15 ). That is, the track  92  of the boundary portion  90 A of the brush roller  82  becomes the track  92 C. On the other hand, the track  92  of the brush roller  86  used as the brush roller  80  with respect to the boundary portion  90 C is inclined in a left side with respect to the transferring direction of the PS printing plate  12  at the interval X and similar to the track  92 D. 
     Accordingly, even when it is intended to rotate the brush rollers  84  ( 82 ) and  86  ( 80 ) in the same direction by using the brush rollers  84  ( 82 ) and  86  ( 80 ) having the different winding directions of the web body  166 , the respective tracks  92  do not overlap with each other on the PS printing plate  12 . 
     Accordingly, it is possible to brush by two brush rollers  80  and  82  so as to cancel the track  92  with respect to the respective boundary portion  90  so as to prevent the rubbed surface irregularity from appearing on the PS printing plate  12 . In this case, it is a matter of course that the brush roller  84  may be used as the brush roller  80  and the brush roller  86  may be used as the brush roller  82 . 
     EMBODIMENT EXAMPLE 4 
     FIG. 17 shows an arrangement of the brush rollers  80  and  82  applied to an embodiment example 4. In the embodiment example 4, the brush roller  84  is used as the brush roller  80  and a brush roller  88  is used as the brush roller  82 . 
     The brush roller  88  employs a roller main body  100 B having a larger outer diameter than that of the roller main body  100 A of the brush roller  84 , as the roller main body  100 . That is, the brush roller  88  employs the roller main body  100 B having an outer diameter d 2  larger than an outer diameter d 1  of the roller main body  100 A (d 1 &lt;d 2 ), and is structured such that the web body  166  is wound around the roller main body  100 B in a helical manner. Accordingly, an outer diameter D 2  of the brush roller  88  is made larger than an outer diameter D 1  of the brush roller  84  (D 1 &lt;D 2 ). 
     In the developing portion  14 , the brush rollers  84  and  88  are rotated in the same direction (for example, in a direction of an arrow C) at the same rotational speed N while the PS printing plate  12  is transferred at the transferring speed V, and the photosensitive layer surface of the PS printing plate  12  is at first brushed by the brush roller  84  used as the brush roller  80  and next brushed by the brush roller  88  used as the brush roller  82 . 
     In the case of brushing the PS printing plate  12  by the brush rollers  84  and  88  having the different outer diameters, since the width W of the web body  166  is the same, an interval X 1  of the track  92  formed by the boundary portion  90 A of the brush roller  84  becomes wider than an interval X 2  of the track  92  formed by the boundary portion  90 D of the brush roller  88  (X 1 &gt;X 2 ). Further, since the winding direction of the web body  166  and the rotational directions of the brush rollers  84  and  88  are the same, the direction of incline of the track  92  becomes constant. 
     On the other hand, since the winding angle of the web body  166  of the brush roller  88  becomes smaller than the winding angle of the web body  166  of the brush roller  84 , the angle θ of the track  92  formed by the boundary portion  90 C of the brush roller  88  becomes larger than the angle θ of the track  92  formed by the boundary portion  90 A of the brush roller  84 . 
     That is, when the brush rollers  84  and  88  having the different outer diameters are used as the brush rollers  80  and  82 , it is possible to obtain a pattern of the track  92  similar to that of the FIG. 13 in the embodiment example 1. 
     Accordingly, two patterns of tracks  92  in which the track  92  of the brush roller  80  ( 84 ) and the track  92  of the brush roller  82  ( 88 ) cross to each other are formed on the PS printing plate  12 , whereby it is possible to brush so as to cancel the respective tracks  92  formed by the mutual boundary portions  90 . Accordingly, in the embodiment example 4, it is possible to prevent the rubbed surface irregularity from appearing on the PS printing plate  12 . 
     FIG. 18 shows an arrangement of the brush roller  80  and  82  applied to an embodiment example 5. In this embodiment example 5, the brush roller  84  is used as the brush roller  82  and a brush roller  94  is used as the brush roller  80 . 
     The brush roller  84  is structured such that a web body  166 B having a width W 1  is wound in a helical manner, on the other hand, the brush roller  94  is structured such that a web body  166 A formed so as to have a larger width W 2  than the width W 1  (W 1 &lt;W 2 ) is wound around the roller main body  164  in a helical manner. That is, in the embodiment example 5, the width of the web body  166  is changed between the brush rollers  80  and  82 . 
     Accordingly, in the brush roller  84  used as the brush roller  82 , a boundary portion  90 A having an interval X 3  is formed in a helical manner, on the other hand, in the brush roller  94  used as the brush roller  80 , a boundary portion  90 E having an interval X 4  is formed in a helical manner. 
     In the developing portion  14  in which the brush rollers  94  and  84  are used as the brush rollers  80  and  82 , the photosensitive layer surface of the PS printing plate  12  is at first brushed by the brush roller  94  and next brushed by the brush roller  84 . At this time, in the developing portion  14 , the brush rollers  84  and  94  are rotated in the same rotational direction (for example, in a direction of an arrow C) at the same rotational speed N while the PS printing plate  12  is transferred at the transferring speed V, whereby the PS printing plate is brushed. 
     In this case, the rotational speed N, the rotational direction (the direction of the arrow C) and the transferring speed V of the PS printing plate  12  are the same between the brush rollers  84  and  94 . Accordingly, an angle θ of the track  92  formed by the boundary portion  90 E of the brush roller  94  becomes larger than an angle θ of the track  92  formed by the boundary portion  90 A of the brush roller  84  (not shown). 
     On the other hand, while the web body  166 B wound around the roller main body  164  of the brush roller  84  has the width W 1 , the web body  166 A wound around the roller main body  164  of the brush roller  94  has the width W 2 . Accordingly, while the track  92  formed by the boundary portion  90 A of the brush roller  84  has an interval X 3 , the track  90  formed by the boundary portion  90 E of the brush roller  94  has an interval X 4  larger than the interval X 3  (X 3 &lt;X 4 ). That is, the tracks  92  of patterns having the different intervals X are formed on the PS printing plate  12 . 
     Accordingly, it is possible to brush so as to prevent the mutual tracks  92  from overlapping with each other between the brush roller  80  using the brush roller  94  and the brush roller  82  using the brush roller  84 . 
     Accordingly, it is possible to prevent the stripe-shaped rubbed surface irregularity from appearing on the PS printing plate  12  and it is possible to prevent the finish quality of the PS printing plate  12  caused by the boundary portion  90  of the web body  166  from being deteriorated. 
     As mentioned above, in the PS printing plate processor  10 , it is possible to securely prevent the track  92  formed by the boundary portion  90  from appearing as the rubber surface irregularity on the surface of the PS printing plate  12  by changing any one of the rotational speed, the rotational direction, the outer diameter, the winding direction of the web body  166  and the width of the web body  166  between the brush rollers  80  and  82  at a time of brushing the PS printing plate  12  with using two brush rollers  80  and  82 , thereby making the patterns of the respective tracks  92  formed on the PS printing plate  12  due to the boundary portion  90  of the web body  166  caused by the brush rollers  80  and  82  different. 
     Accordingly, in the PS printing plate processor  10 , it is possible to securely prevent the finish quality of the PS printing plate  12  from being reduced, the deterioration being generated due to generation of the rubbed surface irregularity on the surface of the PS printing plate  12  by the boundary portion  90  of the web body  16  wound around the roller main body  100  in a helical manner. 
     In this case, in the present embodiments mentioned above, the structure is made such that two brush rollers  80  and  82  are provided, and any one of the rotational speed, the rotational direction, the outer diameter, the winding direction of the web body  166  and the width of the web body  166  is changed between the brush rollers  80  and  82 , however, the structure may be, for example, made such that these changing conditions are combined such as the width of the web body  166  and the rotational speed are changed, or the like. Accordingly, it is possible to more securely prevent the track  92  formed by the boundary portion  90  of the web body  166  from appearing as the rubbed surface irregularity on the surface of the PS printing plate  12  so as to reduce the finish quality of the PS printing plate  12 . 
     Further, in the present embodiment, the description is given of the embodiment having two brush rollers  80  and  82 , however, the present embodiment can be applied to a case of brushing the photosensitive layer surface of the PS printing plate  12  by three or more brush rollers. At this time, it is sufficient that the structure may be made such that the track  92  formed by the boundary portion  90  of the web body  166  has at least two patterns by changing at least one condition among the rotational speed, the rotational direction, the outer diameter, the winding direction of the web body  166  and the width of the web body  166  between at least two brush rollers, and it is preferably that the respective brush rollers form the different track patterns on the surface of the PS printing plate  12  by changing at least one condition among the rotational speed, the rotational direction, the outer diameter, the winding direction of the web body  166  and the width of the web body  166  between all the brush rollers. 
     Next, a description will be given of a modified embodiment. 
     FIG. 19 shows a schematic arrangement of the brush rollers  80  and  82  in accordance with the modified embodiment. The brush rollers  84  are employed as the brush rollers  80  and  82 . Accordingly, the tracks  92  on the PS printing plate  12  caused by the boundary portions  90  of the brush rollers  80  and  82  become the patterns having the same angle of incline with respect to the transferring direction of the PS printing plate  12 . 
     On the other hand, the brush rollers  80  and  82  are arranged along the transferring path of the PS printing plate  12  at a distance L (mm). Accordingly, it is possible to express the number M at which the brush roller  80  rotates after the front end of the PS printing plate  12  transferred along the transferring path is in contact with the brush roller  80  before being in contact with the brush roller  82 , by rotating the brush rollers  80  and  82  at the rotational speed N (r/min) with transferring the PS printing plate  12  at the transferring speed V (mm/min) by the following formula. 
     
       
         
           M=L·N/V  
         
       
     
     The brush roller  84  rotates in the direction of the arrow C, whereby the track  92  is formed on the PS printing plate  12  at the interval X. 
     In this case, for example, by rotating the brush roller  84  in a state of contacting the brush roller  84  with the PS printing plate  12 , the position at which the boundary portion  90  is in contact with the PS printing plate  12  moves in the width direction of the PS printing plate  12 . That is, the contact position of the boundary portion  90  of the brush roller  84  with the PS printing plate  12  is shifted in correspondence to the rotational position of the brush roller  84 . 
     In this case, when the position at which the end portion of the boundary portion  90 A of the web body in the end portion in the axial direction of the brush roller  84  used as the brush roller  80  is in contact with the PS printing plate  12  coincides with the position at which the end portion of the boundary portion  90 B of the web body  166  in the end portion in the axial direction of the brush roller  84  used as the brush roller  82  is in contact with the PS printing plate  12 , the track  92 E of the boundary portion  90 A of the brush roller  80  and the track  92 F of the boundary portion  90 B of the brush roller  82  are overlapped with each other, so that the rubbed surface irregularity will appear on the PS printing plate  12 . 
     That is, as shown in FIG. 20, when a difference between the track  92 E formed by the boundary portion  90 A of the brush roller  80  and the track  92 F formed by the boundary portion  90 B of the brush roller  82  is set to a phase difference φ, if the phase difference φ becomes 0 degree (or 360 degrees), the track  92 E and the track  92 F are overlapped with each other and the rubbed surface irregularity easily appears on the PS printing plate  12 . In this case, the phase difference φ satisfies the relation 0 degree≦φ≦360 degrees. 
     It is possible to prevent the rubbed surface irregularity from appearing on the PS printing plate  12  by shifting the track  92 E formed by the boundary portion  90 A of the brush roller  80  from the track  92 F formed by the boundary portion  90 B of the brush roller  82 . 
     That is, the phase difference φ is set to a relation φ≠0 degree. Further, taking the widths of the tracks  92 E and  92 F into consideration, it is set to a relation 20 degrees≦φ≦340 degrees. 
     Accordingly, it is possible to prevent the rubbed surface irregularity from appearing on the surface of the PS printing plate  12 . In this case, when the phase difference φ satisfies the relation φ=180 degrees, the track  92 F becomes a middle position between two tracks  92 E. 
     In this case, when the number M is an integral number, in order to generate a predetermined phase difference φ between the track  92 E formed by the boundary portion  90 A of the brush roller  80  and the track  92 F formed by the boundary portion  90 B of the brush roller  82 , the brush rollers  80  and  82  are previously rotated relatively at a time of placing the apparatus and stopping the operation so as to shift the position of the end portion in the axial direction of the boundary portion  90 A of the web body  166  wound around the brush roller  80  with respect to the PS printing plate  12  and the position of the end portion in the axial direction of the boundary portion  90 B of the web body  166  wound around the brush roller  82  with respect to the PS printing plate  12  to the position at which the track  92 E and the track  92 F are not overlapped with each other. Of course, the whole of the boundary portion  90 A of the web body  166  wound around the brush roller  80  with respect to the print surface of the PS printing plate  12  and the whole of the boundary portion  90 B of the web body  166  wound around the brush roller  82  may be shifted so that the track  92 E and the track  92 F do not overlap with each other. 
     Further, when the directions of the brush rollers  80  and  82  are fixed so that the phase difference φ satisfies the relation φ=0 degree, it is sufficient to adjust the transferring speed V of the PS printing plate  12 , the rotational speed N or the distance L so that the number M is not an integral number. 
     At this time, taking the widths of the tracks  92 E and  92 F into consideration, for example, it is preferable to make the first decimal place of the result of calculation of the number M be not “0”, after rounding off the second decimal place. That is, if a result of rounding off the first decimal place of the number M is set to I 1 (M), and the result of rounding off the second place of the number M is set to I 2 (M), it is more preferable that the following relation is satisfied. 
     
       
           I   1 ( M )≠ I   2 ( M )  
       
     
     As mentioned above, by giving a predetermined phase difference φ between the track  92 E formed by the boundary portion  90 A of the brush roller  80  and the track  92 F formed by the boundary portion  90 A of the brush roller  82  when the brush rollers  80  and  82  are in contact with the print surface of the PS printing plate  12  so as to shift the tracks  92 E and  92 F, it is possible to prevent the rubbed surface irregularity caused by the boundary portions  90 A of two brush rollers  80  and  82  from appearing on the print surface of the PS printing plate  12  and it is possible to obtain the PS printing plate  12  having a high quality in which no rubbed surface irregularity appears. 
     When two or more brush rollers are provided, it is sufficient that the structure is made such that the tracks  92  are shifted between at least optional two brush rollers. 
     The brush roller may be a so-called multi-wound type in which two or more web bodies  166  are wound in a helical manner. Further, a brush roller in which the web body  166  is pitch wound with a slight interval may be employed. 
     The present invention can be applied, for example, to a brush roller used in a photosensitive material processing apparatus for processing the other photosensitive materials such as an X-ray film, a general black-and-white film, a color film, a black-and-white printing paper, a color printing paper and the like, in addition to the PS printing plate such as the photo polymer plate, the thermal plate, the surface printing plate and the like. 
     As mentioned above, in accordance with the present invention, since the structure is made such that the track of the photosensitive material surface caused by the boundary portion of the web-like member of the brush roller has two patterns or more at a time of brushing the same surface side of the photosensitive material by at least two brush rollers, it is possible to prevent the track of the boundary portion from appearing as the rubbed surface irregularity. 
     Accordingly, it is possible to prevent the finish quality of the photosensitive material brushed by the brush roller from being reduced, whereby it is possible to obtain the photosensitive material having a high finish quality. 
     &lt;&lt;Third Embodiment&gt;&gt; 
     A description will be given below of a third embodiment, however, an overlapping description about the same parts and portions as those of the embodiment mentioned above will be suitably omitted, and a description will be mainly given of characteristic portions. 
     With reference to FIG. 21, in the PS printing plate processor  10 , there are provided plural pairs of rollers gripping the PS printing plate  12  and applying the transferring force to the PS printing plate  12 , such as pairs of transferring rollers  42 ,  48 ,  58 ,  60 ,  56 ,  72 ,  74  and the like. A gripping force for nipping the PS printing plate  12  between the mutually opposing rollers is applied to the pairs of transferring rollers  42 ,  48 ,  58 ,  60 ,  56 ,  72  and  74 , and the pairs of transferring rollers  48 ,  58 ,  60  and  56  are mounted to a side plate corresponding to an inner wall of the processing tank side in a state that a great gripping force is applied to a portion between the opposing rollers, in order to squeeze down the processing solution attached to the surface of the PS printing plate  12  from the surface of the PS printing plate  12 . 
     Here, a description will be given of a mounting of a pair of transferring rollers  60  to the PS printing plate processor  10  on the basis of an example of a pair of transferring rollers  60 , with reference to FIGS. 22 to  24 . 
     A pair of transferring rollers  60  are structured, for example, such that rubber rollers  200  and  202  in which outer peripheral portions of roller main bodies (not shown) are coated by an elastic member such as a silicone rubber or the like are arranged vertically so as to form a pair. Further, gears  204  are provided at both end portions along an axial direction of each of the rubber rollers  200  and  202 , and the structure is made such that the gears  204  are engaged with each other by bringing the outer peripheral surfaces of the roller main bodies into contact with each other and rubber rollers  200  and  202  rotate. 
     In a pair of transferring rollers  60 , mounting bases  210  corresponding to base portions are arranged at both end portions along the axial direction of the rubber rollers  200  and  202 . In each of the rubber rollers  200  and  202 , rotary shafts  206  and  208  protruding out from the gears  204  at both end portions in the axial direction are respectively pivoted to the mounting bases  210 , and the mounting bases  210  are mounted to predetermined positions of a pair of side plates  212  (refer to FIGS. 21 and 24) arranged within the processing tank  22  (refer to FIG.  21 ). 
     In this case, the side plates  212  are provided at both ends in a width direction (a direction perpendicular to the transferring direction) of the PS printing plate  12  transferred within the processing tank  22 . In FIG. 21, only one side plate  212  is shown, and in FIG. 24, a part of the side plate  212  is illustrated. Further, the mounting bases  210  arranged in both end sides in the axial direction of a pair of transferring rollers  60  are formed in the same shape, and the following description will be given with showing any one mounting base  210 . 
     As shown in FIGS. 22 and 23, the mounting base  210  is formed in a substantially rectangular flat shape, and a bearing portion  214  is formed in one end side along a longitudinal direction (a vertical direction on the paper surface in FIGS. 22 and 23) corresponding to an opposing side to the rubber roller  202 , in the mounting base  210 . The bearing portion  214  is formed in a shape protruding to an opposite direction to the rubber roller  202  from the mounting base  210  so as to form a rectangular block shape. 
     In the bearing portion  214 , an axial hole  216  opposing to the rotary shaft  208  of the rubber roller  202  is formed in a center portion of the bearing portion  214 . The rubber roller  202  is rotatably supported to the mounting base  210  by inserting the rotary shafts  208  at both ends to the axial holes  216  of the bearing portion  214 . 
     On the other hand, as shown in FIG. 22, a notch  218  formed in a rectangular shape is formed in another end side in a longitudinal direction of the bearing portion  214  in the mounting base  210 . The notch  218  is formed toward the bearing portion  214  from another end side in the longitudinal direction of the mounting base  210 , whereby leg portions  220  and  222  are formed in the mounting base  210  so as to form a pair. 
     The structure is made such that bearings  224  provided so as to oppose to the rotary shaft  206  of the rubber roller  200  is arranged within the notch  218 . The bearing  224  is structured such that a base portion  226  formed in a substantially rectangular block shape and a flange portion  228  formed so as to expand a width of the base portion  226  are integrally formed, and an axial hole  230  is formed in the center portion so as to pass through the base portion  226  and the flange portion  228 . 
     The rubber roller  200  is structured such that the rotary shaft  206  is inserted to the axial hole  230  of the bearing  224  from the base portion  226  side. At this time, as shown in FIG. 23, a fall-out prevention is applied by attaching a C-ring  232  or the like to a front end of the rotary shaft  206  protruding out to the flange portion  228  side of the bearing  224 . Accordingly, the rubber roller  200  and the bearing  224  are connected so as to relatively rotate. 
     The rubber roller  200  is pivoted to the mounting base  210  by attaching the bearing  224  mounted to the rotary shaft  206  to the mounting base  210 . The base portion  226  of the bearing  224  has a size corresponding to an interval between the leg portions  220  and  222 , and the bearing  224  is attached to the mounting base  220  by inserting the base portion  226  of the bearing  224  into the notch  228  from the front end side of the leg portions  220  and  222 . 
     At this time, the structure is made such that the bearing  224  can move along a direction of moving close to and apart from the bearing portion  214  corresponding to a longitudinal direction of the mounting base  210 , within the notch  218 , whereby an outer peripheral surface of the rubber roller  200  mounted to the bearing  224  is brought into contact with an outer peripheral surface of the rubber roller  202  attached to the bearing  214 . 
     On the other hand, as shown in FIGS. 22 to  24 , a restricting member  234  is mounted so as to be extended between front ends of the leg portions  220  and  222 . Accordingly, an opening of the notch  218  is closed, thereby preventing the bearing  224  mounted to the rubber roller  200  from being taken out from the notch  218 . 
     That is, the notch  218  corresponding to a second bearing receiving portion is formed in the mounting base  210 , and the bearing portion  214  integrally having a first bearing receiving portion and a bearing received in the first bearing receiving portion is formed therein. 
     As shown in FIG. 22, the structure is made such that a fastening screw  238  inserted to a spacer  236  is engaged with a front end in one leg portion  220 . Further, a supporting pin  240  is stood from a front end of another leg portion  222 . A pin hole  242  is pierced along an axial direction of the rubber roller  200  and  202 , in the supporting pin  240 , and the structure is made such that the axial pin  244  is press inserted into the pin hole  242 . 
     On the other hand, in the restricting member  234 , a pair of leg portions  248  and  250  are formed so as to oppose to respective upper ends of the leg portions  220  and  222  from the base portion  246  formed in a rectangular block shape. In this case, in FIGS. 22 to  24 , an illustration of one of the leg portions  250  is omitted. 
     The restricting member  234  is arranged in a state that the leg portion  248  is opposed to the leg portion  220  of the mounting base  210  and the leg portion  250  is opposed to the leg portion  222 . At this time, the structure is made such that the supporting pin  240  is inserted to the portion between the leg portions  250 . 
     Further, in the leg portion  250  of the restricting member  234 , an oblong hole  252  is pierced at a position opposing to the pin hole  242  of the supporting pin  240 . Each of both end portions of the axial pin  244  inserted to the in hole  242  of the supporting pin  240  is structured such as to be inserted into the oblong hole  252  formed in the leg portion  250  of the restricting member  234 . Accordingly, the restricting member  234  is structured such as to be rotatable around the axial pin  244  within the oblong hole  252  between a position closing the opening of the notch  218  and a position (not shown) opening the notch  218 . 
     The bearing  224  attached to the rubber roller  200  can be taken out from the notch  218  by rotating the restricting member  234  around the axial pin  244  so as to be retracted to the position releasing the opening of the notch  218 . That is, it is possible to move the rubber roller  200  from the rubber roller  202  so as to take out by rotating the restricting member  234  to the retracted position. 
     The leg portion  248  of the restricting member  234  is arranged so as to grip the spacer  236  between the leg portion  248  and the front end of the leg portion  220  of the mounting base  210 . The leg portion  248  can be fixed to the leg portion  220  of the mounting base  210  by engaging the fastening screw  238  inserted to the portion between the leg portions  248  with a screw hole (not shown) in the front end of the leg portion  220  of the mounting base  210  in this state. That is, the restricting member  234  is assembled in the mounting base  210  by fixing the leg portion  248  to the fastening screw  238  in a state that the leg portion  250  is engaged with the supporting pin  240 . 
     On the other hand, a through hole  254  is formed in the base portion  246  of the restricting member  234 . The through hole  254  is formed so that an axial direction thereof opposes to the base portion  226  of the bearing  224  received in the notch  218  at a time of assembling the restricting member  234  in the mounting base  210 . 
     In this through hole  254 , a screw portion  256 A of a restricting screw  256  constituting urging and holding means is inserted to the through hole  254 . As shown in FIG. 22, in the restricting screw  256 , a head portion  258  having an outer diameter larger than an inner diameter of the through hole  254  is formed in one end side in an axial direction, and the screw portion  256 A is inserted to the through hole  254  so that the head portion  258  opposes to the base portion  226  of the bearing  224  (refer to FIGS. 23 and 24 (refer to FIGS.  23  and  24 ). 
     A compression coil spring  270  corresponding to urging means is inserted into the through hole  254  of the base portion  246 , and the screw portion  256 A of the restricting screw  256  inserted into the through hole  254  is also inserted to the compression coil spring  270 . 
     The through hole  254  is structured such that a diameter of an end portion in an upper side (an opposite side to the bearing  224 ) is reduced (not shown), whereby the compression coil spring  270  to which the screw portion  256 A is inserted prevents the compression coil spring  270  from being taken out from the upper side of the through hole  254  at a time of being inserted from the lower side of the through hole  254 , and can urge the head portion  258  of the restricting screw  256  toward the bearing  224 . In this case, in accordance with the present embodiment, the outer diameter of the head portion  258  of the restricting screw  256  is set to be larger than the inner diameter of the through hole  254 , however, the structure is made such that the outer diameter of the head portion  258  is made smaller than the inner diameter of the through hole  254  so that the compression coil spring  270  is not removed from the head portion  258 , whereby the head portion  258  enters within the through hole  254 . 
     A nut  272  is engaged with the front end portion protruding from the through hole  254  of the restricting member  234 , in the screw portion  256 A of the restricting screw  256 . Accordingly, it is possible to prevent the restricting screw  256  from being taken out from the through hole  254 , and the compression coil spring  270  received within the through hole  254  urges the head portion  258  of the restricting screw  256  toward the bearing  224 . 
     As shown in FIG. 22, a pressing head  260  is formed in the head portion  258  of the restricting screw  256  in such a manner as to protrude toward the bearing  224 . Further, a patch  274  is provided in the base portion  226  of the bearing  224  so as to oppose to the pressing head  260  of the restricting screw  256 . This patch  274  is formed, for example, a stainless steel small piece, and is fixed by applying a rod (for example, a smoothing iron tip) plural portions of which are heated so as to deform the resin base portion  226 , a so-called caulking, in a state of being arranged at a predetermined position of the resin base portion  226 . 
     The restricting screw  256  is inserted to the through hole  254  in a state of assembling the restricting member  234  in the mounting base  210  so as to be fixed by the nut  272  in accordance with a double-nut system, whereby the head portion  258  protrudes from the base portion  246  of the restricting member  234 . In this state, by fixing the restricting member  234  by the fastening screw  238 , the pressing head  260  is brought into contact with the patch  274  provided in the base portion  226  of the bearing  224 . 
     Accordingly, the restricting screw  256  presses the bearing  224  toward the bearing portion  214  due to the urging force of the compression coil spring  270 , whereby the outer peripheral surface of the rubber roller  202  is held in a state of being brought into contact with the outer peripheral surface of the rubber roller  200 . At this time, by adjusting a degree of engagement of the nut  272  with the screw portion  256 A, it is possible to adjust the urging force of the restricting screw  256  to the bearing  224 , so that it is possible to adjust a degree of contact of the rubber roller  202  with the rubber roller  200 . 
     As mentioned above, a pair of transferring rollers  60  in which the rubber rollers  200  and  202  are assembled are structured such that the base portion  226  of the bearing  224  presses the restricting screw  256  into the through hole  254  against the urging force of the compression coil spring  270 , at a time of gripping the PS printing plate  12  between the rubber rollers  200  and  202 . Further, the restricting screw  256  is pressed within the through hole  254 , whereby a great nipping force can be obtained at a time of gripping the PS printing plate  12  between the rubber rollers  200  and  202 . 
     In a pair of transferring rollers  60  in which the rubber roller  200  and the rubber roller  202  are assembled via the mounting base  210  in the manner mentioned above, as well as the rubber roller  202 , the rubber roller  200  can be assembled in the mounting base  210  in a significantly easy manner. Further, at a time of taking out the rubber roller  200  from the mounting base  210 , an operation can be easily performed only by loosening the fastening screw  238  so as to cancel the fixing of the leg portion  248  of the restricting member  234  to the mounting base  210  and thereafter rotating the restricting member  234  around the leg portion  250  side connected to the leg portion  222  of the mounting base  210 . 
     Further, since no operation against the urging force for applying the great nipping force to the PS printing plate  12  exists at a time of taking out the robber rollers  200  and  202  as well as at a time of assembling, a pair of transferring rollers  60  can be significantly easily maintained. 
     On the other hand, as shown in FIG. 24, a receiving portion  262  for a pair of transferring rollers  60  is formed in the side plate  212  at a time of molding. The receiving portion  262  is formed in a rectangular space in which a longitudinal direction is substantially a vertical direction. The longitudinal direction of the receiving portion  262  coincides with a direction connecting an axis of the rubber roller  200  and an axis of the rubber roller  202  when a pair of rollers  60  form the transferring path of the PS printing plate  12 . 
     Further, the receiving portion  262  is structured such that an interval between wall portions  264  in both sides coincides with the bearing portion  214  of the mounting base  210  and the flange portion  228  of the bearing  224  assembled in the mounting base  210 . Accordingly, a pair of transferring rollers  60  are attached to a portion between a pair of side plates  212  provided in both sides in the transferring direction of the PS printing plate  12  by fitting the bearing portion  214  of the mounting base  210  and the flange portion  228  of the bearing  224  mounted to the mounting base  210  to the receiving portion  262 . 
     Further, a bottom portion  266  of the receiving portion  262  is formed so that when the bearing portion  214  of the mounting base  210  is brought into contact therewith, the rubber roller  202  of a pair of transferring rollers  60  is arranged at a position for forming the transferring path of the PS printing plate  12  within the PS printing plate processor  10 , and a depth of the receiving portion  262  is set to a depth at which the front ends of the rotary shafts  206  and  208  protruding from the bearing portion  214  and the flange portion  228  of the bearing  224  are not brought into contact with a back wall  268 . 
     In this case, the receiving portion  262  reaches the upper end of the side plate  212  in an upper side corresponding to an opposite side of the bottom portion  266  (not shown), whereby it is possible to insert the bearing portion  214  and the flange portion  228  of the bearing  224  from the above. Further, the mounting base  210  is prevented from moving upward by optional mounting means in a state of receiving the bearing portion  214  and the flange portion  228  of the bearing  224  within the receiving portion  262 , whereby a pair of transferring rollers  60  can be assembled between a pair of side plates  212 . 
     Further, in the side plate  212 , a gear rotated by a drive force output from a drive source (not shown) is protruded at a predetermined position, and the structure is made such that the gear is engaged with the gear  204  provided in the rubber roller  202  by arranging a pair of transferring rollers  60  at a predetermined position of the side plate  212 . Accordingly, the drive force for transferring the PS printing plate  12  to a pair of transferring rollers  60  is transmitted. 
     As mentioned above, since a pair of transferring rollers  60  are structured such that the rubber roller  200  and the rubber roller  202  are fitted to the receiving portion  262  formed in the side plate  212  in a state of being assembled by the mounting base  210 , thereby being significantly easily attached to and detached from the portion between a pair of side plates  212 . Further, since a positioning can be performed only by bringing the bearing portion  214  of the mounting base  210  into contact with the bottom portion  266  of the receiving portion  262  at a time of attaching a pair of transferring rollers  60  to the portion between a pair of side plates  212 , it is significantly easily perform the positioning at a time of attaching. 
     In this case, the present embodiment mentioned above does not limit the structure of the present invention. For example, in the present embodiment, the bearing portion  214  corresponding to the first bearing is integrally formed with the mounting base  210 , however, the structure may be made such that the bearing  224  is used as the first bearing and a rectangular hole to which the base portion  226  of the bearing  224  is fitted is formed as the first bearing receiving portion in the mounting base  210 . 
     Further, in the present embodiment, the restricting screw  256  provided in the restricting member  234  and the compression coil spring  270  are used as the urging and holding means, however, the urging and holding means in accordance with the present invention is not limited to this, it is possible to employ an optional structure for urging the bearing  224  toward the bearing portion  214  at a time of fixing the restricting member  234  to the leg portion  220  by the fastening screw  238  (for example, a ball plunger or the like). 
     Further, in the present embodiment, the description is given of the PS printing plate processor  10  for processing the PS printing plate  12  corresponding to the photosensitive material, however, a pair of transferring rollers to which the present invention is applied can be used in an optional photosensitive material processing apparatus for processing the other photosensitive materials such as an optional printing paper, a camera film or the like without being limited to the photosensitive surface printing plate such as the PS printing plate  12  or the like. 
     As mentioned above, in accordance with the present invention, since the structure is made such that the bearing portion supporting a pair of rollers is arranged in the first and second bearing receiving portions provided in the base portion, and the urging and holding means is provided in the restricting member for preventing the bearing from being taken out from the second bearing receiving portion so as to press the bearing received in the second bearing receiving portion to the bearing received in the first bearing receiving portion by the urging and holding means, it is unnecessary to perform the work against the nipping force applied to the portion between the rollers at a time of taking out the rollers from the base portion as well as at a time of assembling. Accordingly, it is possible to significantly easily perform a maintenance of a pair of rollers. 
     &lt;&lt;Fourth Embodiment&gt;&gt; 
     A description will be given below of a fourth embodiment. In this case, with respect to the same parts and portions as those of the embodiments mentioned above, an overlapping description will be suitably omitted and a description will be mainly given of characteristic portions. 
     With reference to FIG. 25, the spray pipes  62 A and  62 B provided in the water washing portion  16  and the spray pipe  64  and the discharging unit  66  provided in the desensitization processing portion  18  are respectively arranged in upper and lower portions with respect to the transferring path of the PS printing plate  12  so as to form a pair, and the structure is made such as to discharge the washing water and the gum solution supplied at a predetermined timing toward the front and back surfaces of the PS printing plate  12  so as to apply to the front and back surfaces of the PS printing plate  12 . 
     Here, a description will be given of the spray pipe provided in the PS printing plate processor  10  on the basis of the embodiment of the spray pipes  62 A and  62 B provided in the water washing portion  16 . 
     As shown in FIGS. 26 to  30 , the spray pipes  62 A and  62 B are provided as a spray unit  300  in the PS printing plate processor  10 . The spray unit  300  is constituted by a pipe  302  forming the spray pipe  62 A and a pipe  304  forming the spray pipe  62 B. 
     As shown in FIG. 26, the pipes  302  and  304  have a length coinciding with a pair of side plates  212  ( 212 A and  212 B) arranged in both sides in a width direction perpendicular to the transferring direction of the PS printing plate  12  within the processing tank  22  (refer to FIG. 25) so as to form a pair and axially supporting a pair of transferring rollers  58  and  60  and the like. Further, the spray unit  300  connects one end sides in a longitudinal direction of the pipes  302  and  304  by using a holding member  306  and connects another end sides by using a connecting holder  308  so as to keep the pipes  302  and  304  at a predetermined interval, whereby the PS printing plate  12  (not shown) can pass through the portion between the pipes  302  and  304 . 
     As shown in FIG. 27, an end cap  310  corresponding to a fastening plug is mounted to an end portion in the side of the holding member  306 , whereby the pipes  302  and  304  are closed. Further, as shown in FIGS. 26 to  29 , a flat portion  314  having a predetermined width is formed in an outer peripheral portion of each of the pipes  302  and  304  along the axial direction, and through holes  316  corresponding to the discharging holes are formed in the flat portion  314  at a predetermined interval. 
     As shown in FIG. 27, the holding member  306  is formed in a rectangular block shape, and through holes  318  and  320  to which the pipes  302  and  304  are inserted are formed at a predetermined interval along a longitudinal direction. Inner surfaces are formed in a curved manner in the respective through holes  318  and  320  in such a manner as to have inner diameters corresponding to outer diameters of the respective pipes  302  and  304 , and flat surfaces  322 A and  322 B opposing to the flat surfaces  314  of the pipes  302  and  304  are formed at predetermined positions. 
     The pipes  302  and  304  are inserted to the through holes  318  and  320  in a state of opposing the flat surfaces  314  to the flat surfaces  322 A and  322 B. Accordingly, the pipes  302  and  304  are prevented from rotating, and the through holes  316  are directed toward a predetermined direction with respect to the holding member  306 . In this case, in the spray unit  300 , the structure is made such that the pipe  304  is inserted to the inserting hole  320  of the holding member  306 , however, the structure may be made such that the pipe  304  and the holding member  306  are integrally formed or previously adhered to each other. 
     As shown in FIGS. 26 and 27, a projecting portion  324  is provided in an end portion in a side of the through hole  318  (in a side of the pipe  302 ), in the holding member  306 . Further, as shown in FIG. 26, the holding member  306  is structured such as to be inserted into a recess portion  326  formed at a predetermined position of the side plate  212 A from the above. At this time, the holding member  306  can be inserted to the recess portion  326  and taken out from the recess portion  326  by pinching and holding the projecting portion  324 . 
     On the other hand, as shown in FIGS. 28 to  30 , the connecting holder  308  is constituted by a block-shaped holder main body  328  and an adapter  330 . As shown in FIGS. 28 to  30 , connecting portions  332  and  334  respectively opposing to the pipes  302  and  304  are protruded from the holder main body  328 . An inserting port  336  is formed in each of the connecting portions  332  and  334 . 
     Seal caps  338  are attached to another end sides of the pipes  302  and  304 , and the pipes  302  and  304  are tightly inserted to the inserting ports  336  together with the seal cap  338  so as to be connected to the holder main body  328 . In this case, as shown in FIGS. 26,  28  and  29 , a fastening metal fitting  340  is mounted to a lower end of the holder main body  328 , whereby the pipe  304  is prevented from being taken out from the holder main body  308 . 
     An interval of axes of the inserting ports  336  coincides with an interval between axes of the through holes  318  and  320  formed in the holding member  306 , whereby the pipes  302  and  304  are held between the holding member  304  and the connecting holder  306  in a parallel manner. 
     As shown in FIG. 30, an inner portion of the holder main body  328  is made hollow (a hollow portion  342 ), and this hollow portion  342  is open to a bottom portion of the inserting port  336 . Accordingly, the pipes  302  and  304  mounted to the holder main body  328  are communicated with the hollow portion  342 . 
     A pipe portion  344  is protruded from an upper end portion (an end portion in a side of the adapter  330 ) of the holder main body  328 . As shown in FIG. 30, an inner portion of the pipe portion  344  is communicated with the hollow portion  342  of the holder main body  328 . 
     Further, the adapter  330  is formed in a substantially cylindrical shape in which one end in an axial direction is closed, and the pipe portion  344  is fitted to an opening end thereof. Accordingly, the inner portion of the adapter  330  is communicated with the hollow portion  342  of the holder main body  328 . In this case, the holder main body  328  and the adapter  330  is kept in a connected state by a connecting metal fitting  346  so as to be fixed. 
     An entry port  348  is protruded from an outer peripheral portion in the adapter  330 . The entry port  348  is protruded outward in a radial direction from the outer peripheral portion of the adapter  330 , and an inner portion thereof is communicated with the inner portion of the adapter, as shown in FIG.  30 . 
     As shown in FIG. 29, the entry port  348  is inserted to a socket (an inserting port) of a coupling  352  provided in a front end of a flexible hose  350 , whereby the hose  350  is connected. For example, a constriction portion  348 A is formed in the entry port  348 , the constriction portion  348 A is engaged with a ring provided in an inner portion of the coupling  352  by inserting the entry port  348  to the inner portion of the coupling  352 , so that the entry port  348  and the coupling  352  are connected to each other. Further, the coupling  352  is structured such that the engagement with the entry port  348  is cancelled by sliding a sliding portion  354  to a side of the hose  350 , whereby the entry port  348  can be drawn out from the coupling  352 . That is, the entry port  348  and the coupling  352  can be easily connected and cancelled from the connected state in accordance with a one-touch operation. 
     The hose  350  is structured such that an end portion in an opposite side to the coupling  352  is communicated with a pipe  382  (refer to FIG. 25) in the bottom portion of the water washing tank  26  via a solution supplying pump (not shown), whereby when the solution supplying pump (not shown) is operated, a cleaning water is supplied to the hollow portion  342  of the holder main body  328  via the hose  350 , the adapter  330  and the like. 
     The washing water supplied to the hollow portion  342  flows into the inner portions of the pipes  302  and  304  from the inserting ports  336  of connecting portions  332  and  334 , thereby being discharged from the through holes  316  of the pipes  302  and  304 . 
     On the other hand, as shown in FIG. 30, a step portion  356  is formed between the inserting port  336  of the connecting portion  332  and the inserting port  336  of the connecting portion  334 . An opening cross sectional area of the hollow portion  342  is changed by the step portion  356 . Accordingly, the holder main body  328  functions as an orifice so as to adjust a flow amount of each of the washing water flowing into the pipe  302  and the washing water flowing into the pipe  304 . In this case, in the present embodiment, the step portion  356  is formed so that the flow amount of the washing water flowing into the pipe  302  is substantially equal to the flow amount of the washing water flowing into the pipe  304 . 
     On the other hand, as shown in FIGS. 26 and 29, a substantially L-shaped bracket  358  is mounted to a surface in an opposite side to the connecting portions  332  and  334 , in the holder main body  328 . The bracket  358  is structured such that a front end is mounted along a longitudinal direction of the holder main body  328 . 
     As shown in FIG. 26, a slit-like mounting groove  360  is integrally formed in the side plate  212 B opposing to the connecting holder  308 , at a predetermined position. The bracket  358  is inserted to the mounting groove  360  from the above (an upper side on the paper surface in FIG. 26) so as to reach a predetermined position, and held there. 
     Accordingly, the pipes  302  and  304  connected to the connecting holder  308  are arranged at a predetermined position within the water washing portion  16 . Further, at this position, the adapter  330  formed in the connecting holder  108  is arranged at a position at which the adapter  330  protrudes from the upper end of the side plate  212 B or a position at which the adapter  330  opposes to a notch (not shown) formed in the side plate  212 B, whereby in a state of attaching the connecting holder  308  to the side plate  212 B, the hose  350  can be attached to and detached the hose  350  from the entry port  348  (not shown in FIG.  26 ). 
     The spray unit  300  constituted in the manner mentioned above is inserted to the portion between a pair of side plates  212  ( 212 A and  212 B) in a state of connecting the pipes  302  and  302  corresponding to the spray pipes  62 A and  62 B by the holding member  306  and the connecting holder  308  so as to integrally form. At this time, the holding member  306  side is inserted into the recess portion  326  by holding the projecting portion  324  and in the connecting holder  308  side, the bracket  358  is inserted to the mounting groove  360  by holding the adapter  330  firmly connected by the connecting metal fitting  346 . Accordingly, the holding member  306  and the connecting holder  308  are attached to predetermined positions of the side plates  212 A and  212 B, whereby the pipes  302  and  304  are respectively arranged at predetermined positions with forming the transferring path of the PS printing plate  12  therebetween so as to oppose to each other. 
     At this time, since the directions of the through holes  316  of the pipes  302  and  304  with respect to the holding member  306  are defined by the flat portions  314  respectively provided in the pipes  302  and  304  and the flat surface portions  322 A and  322 B formed in the inserting holes  318  and  320  of the holding member  306 , not only the positions of the pipes  302  and  304  and the directions of the through holes  316  can be suitably set by attaching the holding member  306  to the predetermined position of the side plate  212 A. 
     In this case, in the spray unit  300 , the directions of the through holes  316  are defined by the relation between the pipes  302  and  304  and the holding member  306 , however, the structure can be made such that the directions of the through holes  316  are defined by the relation between the pipes  302  and  304  and the connecting holder  308  (the holder main body  328 ). 
     The spray unit  300  inserted between a pair of side plates  212  becomes in a state that the washing water corresponding to the processing solution can be supplied to the pipes  302  and  304 , by connecting the hose  350  to the entry port  348  of the adapter  330 . At this time, it is possible to easily connect the hose  350  to the entry port  348  by the coupling  352 . 
     Further, at a time of taking out the spray unit  300  from the portion between a pair of side plates  212 , the hose  350  is taken out from the entry port  348  of the adapter  330 . At this time, since the coupling  352  is used, it is possible to easily take out the hose  350  from the entry port  348 . 
     Thereafter, by integrally lifting up the holding member  306  and the connecting adapter  308  so as to take out from the recess portion  326  and the mounting groove  360 , it is possible to easily take out the spray unit  300 , that is, the spray pipes  62 A and  62 B. 
     On the other hand, the spray unit  300  is structured such that the pipe  302  (the spray pipe  62 A) opposing to the upper side of the transferring path of the PS printing plate  12  can slide along the axial direction. Accordingly, at first, the pipe  302  is slid to the side of the holding member  306 . Therefore, it is possible to take out the front end in the side of the connecting holder  308  of the pipe  302  from the inserting port  336  formed in the connecting portion  332  of the holder main body  328 . 
     Thereafter, the pipe  302  is slid and moved to the side of the connecting holder  308  (the side plate  212 B), whereby the end portion in the side of the holding member  306  of the pipe  302  is taken out from the inserting port  318  of the holding member  306 . Accordingly, since it is possible o take out only the pipe  302  from the spray unit  300  arranged between a pair of side plates  212 , it is possible to take out the PS printing plate  12  without cutting even when a transferring error such as a jamming or the like is generated in the PS printing plate  12 . 
     As mentioned above, the spray unit  300  can be significantly easily attached to and taken out from the portion between a pair of side plates  212  and the pipe  302  (the spray pipe  62 A) does not get in the way even when the transferring error is generated in the PS printing plate  12 , so that it is possible to improve an ease of maintenance of the PS printing plate processor  10 . 
     Here, in the present embodiment, the description is given of the embodiment of the spray pipes  62 A and  62 B provided in the water washing portion  16 , however, the structure of the spray unit  300  can be applied to the structure between the spray pipe  64  and the discharging unit  66  provided in the desensitization processing portion  18 . In this case, the structure may be made such that the holding member and the connecting holder are formed in correspondence to the cross sectional shapes of the spray pipe  64  and the discharging unit  66  and the opening cross sectional area of the hollow portion within the connecting holder is changed in correspondence to the discharging amount of the gum solution from the spray pipe  64  and the injecting amount of the gum solution from the discharging unit  66 . 
     Further, the present embodiment mentioned above does not limit the structure of the present invention. For example, in the present embodiment, the description is given of the embodiment of the PS printing plate processor  10  for processing the PS printing plate  12  corresponding to the photosensitive material, however, the spray pipe to which the present invention is applied is not limited to the photosensitive surface printing plate of the PS printing plate  12  or the like, and can be applied to a spray pipe having an optional structure opposing to a transferring path of a photosensitive material and injecting a processing solution toward the photosensitive material, in an optional photosensitive material processing apparatus for processing the other photosensitive materials such as an optional printing paper, a camera film and the like. 
     As mentioned above, in accordance with the present invention, it becomes significantly easy to attach and detach the pipes arranged so as to form a pair in both sides of the transferring path of the photosensitive material. Further, in accordance with the present invention, since it is possible to easily take out only one of the pipes arranged in both sides of the photosensitive material, it is possible to obtain an excellent effect that the maintenance can be easily performed even when the transferring error of the photosensitive material is generated. 
     &lt;&lt;Fifth Embodiment&gt;&gt; 
     A description will be given below of a fifth embodiment. In this case, with respect to the same parts and portions as those of the embodiments mentioned above, an overlapping description will be suitably omitted and a description will be mainly given of characteristic portions. 
     With reference to FIG. 31, a filter for removing solid materials in the processing solution such as the developing solution, the washing water, the gum solution and the like is provided in the PS printing plate processor  10 . The filter is received in a filter case provided in the middle of the pipe passage through which the processing solution passes. The filter case is, for example, provided in a pipe passage for supplying the developing solution within the developing tank  24  to the spray pipe  50 , in the developing portion  14 , and the structure is made such that the solid materials in the developing solution are removed (filtered) by the filter provided within the filter case when the developing solution within the developing tank  24  is supplied and circulated by a circulating pump (not shown). 
     Further, in the water washing portion  16  and the desensitization processing portion  18 , filter cases (not shown) are respectively provided in the middle of a pipe passage for supplying the washing water within the water washing tank  26  to the spray pipes  62 A and  62 B and in the middle of a pipe passage for supplying the gum solution within the desensitization processing tank  28  to the spray pipe  64  and the discharging unit  66 , and the structures are respectively made such as to filter the solid materials in the washing water and the gum solution. In this case, since the pipe passage provided with the filter case, the mounting position and the like can employ the conventionally known structure, the detailed description thereof will be omitted in the present embodiment. 
     Here, a description will be given of a filter case  400  applied to the PS printing plate processor  10  with reference to FIGS. 32 to  36 . 
     As shown in FIG. 32, the filter case  400  is provided with an outer case  402 . As shown in FIG. 33, the outer case  402  is formed in a substantially cylindrical shape and one surface along an axial direction thereof is opened. 
     Further, as shown in FIGS. 32 and 33, an introduction pipe  406  to which the processing solution is fed is connected to a bottom portion  408  in the outer case  402 , and a delivery pipe  404  from which the processing solution is fed out is connected to an outer peripheral portion therein. Accordingly, the processing solution fed within the outer case  402  from the introduction pipe  406  flows out from the delivery pipe  404 . In this case, a bracket  410  is mounted to the outer peripheral portion in the outer case  402 , and the filter case  400  is mounted to a predetermined position within the PS printing plate processor  10  by the bracket  410  so that an opening surface (a surface opposite to the bottom portion  408 ) is substantially upward. 
     As shown in FIG. 33, in the outer case  402 , an upper end is an opening  402 A, and a female screw portion  412  is provided in the periphery of a lower side (an upper end portion of the outer case  402 ) of the opening  402 A. Ribs  414  are provided in the female screw portion  412 . A pair of ribs  414  are provided at mutually opposing positions so as to be protruded out from the outer peripheral surface of the outer case  402  along a radial direction, in a predetermined range of angle (for example, 90 degrees) around a center (axis) of the outer case  402 . 
     A stopper  416  extended toward a lower portion (a side of the bottom portion  408 ) is provided in one end side along a peripheral direction of the outer case  402 , in each of the ribs  414 . Further, the rib  414  is inclined so that the side of the stopper  416  is a lower side. 
     As shown in FIG. 32, a cap  418  is attached to an upper end portion of the outer case  402 . The cap  418  is attached, whereby an upper portion of the outer case  402  is closed and sealed. 
     As shown in FIGS. 34 and 35, a pair of projection portions  420  are provided on an inner surface of the cap  418 . The projection portions  420  are protruded inward in a radial direction from the inner surface of the cap  418 . Further, a pacing  422  is mounted to a position opposing to the opening  402 A of the outer case  402 , in the cap  418 . 
     The cap  418  is get on the outer case  402  so that the projection portions  420  are positioned between a pair of ribs  414  provided in the outer case  402 . Accordingly, the projection portions  420  can oppose to the lower surfaces of the ribs  414 . In this state, by rotating the cap  418  so as to direct the projection portions  420  to the stoppers  416  (about 90 degrees in a direction of an arrow C), the projection portions  420  are slidably contact with the lower surfaces of the ribs  414  and brought into contact with the stoppers  416 . 
     At this time, since the ribs  414  are inclined downward, the opening  402 A of the outer case  402  is pressed to the packing  422  provided in the cap  418 , whereby the outer case  402  is sealed by the cap  418 . 
     On the other hand, as shown in FIG. 34, an inner tube  424  is protruded toward an inner side of the outer case  402 , in the cap  418 . The inner tube  424  is structured such that a front end is opened and the open front end is fitted to the opening of the delivery pipe  406  at a time of attaching the cap  418  to the outer case  402  (not shown). 
     Further, a plurality of opening portions  426  extended along an axial direction are formed in an outer peripheral portion of the inner tube  424 . 
     Accordingly, the processing solution fed to the outer case  402  from the introduction pipe  406  flows out of the inner tube  424  from the opening portion  426  and flows into the delivery pipe  404 . 
     A filter element  428  is attached to the inner tube  424 . As shown in FIGS. 34 to  36 , the filter element  428  is structured such that a filter  432  is provided in an outer peripheral portion of a frame body  430  framed in a substantially cylindrical shape in such a manner as to close the opening of the outer peripheral portion of the frame body  430 . Further, as shown in FIGS. 34 and 35, a flange portion  434  extended outward in a radial direction is formed in one end side in an axial direction, in the frame body  430 . 
     The frame body  430  has an inner diameter slightly larger than an outer diameter of the inner tube  424  provided in the cap  418 , and the inner tube  424  is inserted into the frame body  430  from the side of the flange portion  434 , whereby the filter element  428  is attached to the cap  418 . At this time, as shown in FIGS. 35 and 36, a length of the inner tube  424  along the axial direction is slightly longer than a length of the frame body  430  along the axial direction, whereby a front end of the inner tube  424  protrudes from the frame body  430 . 
     In the frame body  430  of the filter element  428 , a pair of substantially rectangular notches  436  forming a hole portion are formed in an end portion opposite to the flange portion  434 . Further, in a front end of the frame body  430 , rectangular projections  438  are formed in an opposite side to a direction of an arrow D of the notch  436 , and rectangular projections  440  are respectively formed between the notches  436 . 
     Further, in the front end of the frame body  430 , inclined portions  442  are formed between the notches  436  and the projections  440 . The inclined portions  442  is inclined so that the front end of the frame body  430  gradually moves from the flange portion  434  in a region from the side of the notches  436  toward the projections  440 . 
     On the other hand, pawl portions  444  are formed at positions opposing to the notches  436  of the frame body  430 , in the front end portion of the inner tube  424  inserted into the frame body  430  of the filter element  428 . The pawl portions  444  are protruded outward in the radial direction from the outer peripheral portion of the inner tube  424 . Further, as shown in FIG. 34, in the cap  418 , a packing  446  is provided in the periphery of the inner tube  424  in such a manner as to oppose to the flange portion  434  of the filter element  428 . 
     In this case, the structure may be made such that the notches  436 , the projections  440 , the inclined portions  442  and the like are provided in the lower end portion of the inner tube  424  and the pawl portions  444  are provided in the lower end portion of the frame body  430 . 
     The inner tube  424  is structured such that the pawl portions  444  enter into the notches  436  so as to oppose to the inclined portions  442  when the inner tube  424  is inserted to the frame body  430  of the filter element  428 . In this state, by rotating the filter element  428  in the direction of the arrow D, the pawl portions  444  of the inner tube  424  moves until being brought into contact with the projections  440  while being slidably contact with the inclined portions  442  of the frame body  430 . 
     At this time, the frame body  430  of the filter element  428  relatively moves toward the cap  418  by the pawl portions  444  being in contact with the inclined portions  442 , and the flange portion  434  is pressed to the packing  446 . 
     Accordingly, the frame body  430  is gripped between the pawl portions  444  and the packing  446  provided in the cap  418 , whereby the filter element  428  is held. That is, the filter element  428  is rotated at about 90 degrees in the direction of the arrow D in a state that the inner tube  424  is inserted to the frame body  430 , whereby the frame body  430  is tightly gripped between the pawl portions  444  and the packing  446  so as to be attached to the cap  418 . 
     The filter element  428  is inserted into the outer case  402  in a state of being attached to the cap  418 , thereby being attached within the filter case  400 . 
     In the filter case  400  to which the filter element  428  is attached in the manner mentioned above, the processing solution fed within the outer case  402  from the introduction pipe  406  flows out from the opening portion  426  of the inner tube  424  and passes through the filter  432  of the filter element  428  provided in the outer peripheral portion of the inner tube  424 . At this time, the solid materials are filtered by the filter  432 . Thereafter, the processing solution flows out within the delivery pipe  404  and is discharged out from the outer case  402 . 
     On the other hand, there is a case that the solid materials filtered from the processing solution are attached to the filter  432  provided in the filter element  428 , whereby the filter  432  is clogged. Accordingly, it is necessary to perform a maintenance such as a cleaning, a replacement or the like of the filter element  428  (the filter  432 ) periodically or in correspondence to the clogged state of the filter  432 . 
     That is, the solid materials in the processing solution are attached to the filter  432 , whereby a permeability of the processing solution is gradually reduced in the filter  432 . Accordingly, a circulating amount of the processing solution or the like is reduced, and there is a risk that a reduction of processing performance of the PS printing plate  12  due to the reduction of the circulating amount is generated. 
     Further, the clogging of the filter  432  gives a great load to the pump for circulating the processing solution and the motor for driving the pump. In this case, as shown in FIGS. 34 and 35, in the filter element  428  applied to the present embodiment, narrow opening portions  448  in which no filter  432  is provided are formed in the end portion in the side of the flange  434  of the frame body  430 . Since the opening portions  448  are provided within the cap  418  covering the outer case  402 , the processing solution does not normally flow therein. However, when the clogging is generated in the filter  432 , an amount of permeation of the processing solution is largely reduced, the processing solution is stored within the outer case  402  and the liquid surface is ascended to reach the opening portions  448 , the processing solution flows into the inner tube  424  from the opening portions  448 . Accordingly, it is possible to prevent the clogging of the filter  432  from applying a great load to the pump for circulating the processing solution or the like so as to give troubles to the operation. 
     In the filter case  400 , at a time of performing a maintenance of the filter element, at first, the cap  418  is turned at about 90 degrees in the direction opposite to the direction of an arrow C. Accordingly, when the projection portions  420  provided in the cap  418  are taken out of from the ribs  414  of the outer case  402 , it is possible to take out the cap  418 , and it is possible to take out the filter element  428  mounted to the cap  418  from the outer case  402  by moving the cap  418  apart from the outer case  402 . 
     Further, in the filter element  428 , the pawl portions  444  are opposed to the notches  436  by rotating the frame body  430  with respect to the inner tube  424  (the cap  418 ) at about 90 degrees in the direction opposite to the direction of an arrow D so as to bring the pawls  444  in the inner tube  424  into contact with the projections  438  and rotate and engage. Accordingly, the filter element  428  can be taken out from the inner tube  424 . 
     As mentioned above, in the filter case  400 , it is possible to easily take out the filter element  428  in accordance with an operation of turning the cap  418  and an operation of turning the filter element  428 . 
     On the other hand, at a time of attaching the filter element  428  to the outer case  402 , at first, the inner tube  424  provided in the cap  418  is inserted to the frame body  430  of the filter element  428  and the pawl portions  444  of the inner tube  424  are inserted to the notches  436  formed in the frame body  430 . In this state, by turning the frame body  430  at about 90 degrees in the direction of the arrow D, the filter element  428  can be attached to the cap  418 . 
     At this time, since the pawl portions  444  of the inner tube  424  move while being slidably contact with the inclined portions  442  of the frame body  430 , the filter element  428  is closely attached to the cap  418  or the inner tube  424  when the pawl portions  444  are brought into contact with the projections  440 . 
     Thereafter, the filter element  428  attached to the cap  418  is inserted to the outer case  402 , the cap  418  is covered over the outer case  402 , and the cap  418  is turned at about 90 degrees in the direction of the arrow C. At this time, the projection portions  420  provided in the cap  418  move while being slidably contact with the ribs  414 , whereby the openings  402 A of the outer case  402  are pressed to the packing  522 . Accordingly, the outer case  402  and the cap  418  are closely attached. 
     As mentioned above, in the filter case  400 , the cap  418  can be attached to the filter element  428  by inserting the inner tube  424  provided in the cap  418  to the frame body  430  of the filter element  428  and turning the frame body  430  in the direction of the arrow D, and the filter element  428  can be attached to the outer case  402  in accordance with a simple operation of turning the cap  418  at about 90 degrees in the direction of the arrow C in a state of inserting the filter element  428  to the outer case  402 . 
     Further, since a range of turning the cap  418  and the filter element  428  is limited by the stoppers  416  provided in the ribs  414  of the outer case  402  and the projections  438  and  440  provided in the frame body  430  of the filter element  428 , it is possible to securely attach and detach the filter element  428 . 
     In this case, the present embodiment mentioned above shows one embodiment in accordance with the present invention and does not limit the structure in accordance with the present invention. For example, the outer case  402 , the cap  418 , the filter element  428  and the like are not limited to a cylindrical shape, and an optional shape such as a rectangular tubular shape or the like can be applied thereto. 
     Further, in the present embodiment, the description is given of the embodiment of the PS printing plate processor  10  for processing the PS printing plate  12  corresponding to the photosensitive material, however, it is possible to be used in a photosensitive material processing apparatus having an optional structure which processes the other photosensitive materials such as the printing paper, the camera film and the like in addition to the printing plate such as the PS printing plate  12  or the like by the processing solution. 
     As mentioned above, in accordance with the present invention, it is easy to attach and detach the filter element, so that there is an excellent effect that it is possible to improve an operability at a time of performing the maintenance such as a cleaning of the filter or the like.