Patent Publication Number: US-6210049-B1

Title: Image forming apparatus and fluid injecting apparatus

Description:
This is a Continuation-in-Part of Application Ser. No. 08/997,694 filed Dec. 23, 1997, now U.S. Pat No. 5,960,224 which is hereby incorporated by reference. 
    
    
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to an image forming apparatus and a fluid injecting apparatus which can suitably inject a solvent for forming an image to an image recording material such as a photosensitive material, an image receiving material and the like. 
     2. Description of the Related Art 
     An image forming apparatus for performing an image recording operation by using two kinds of image recording materials, for example, a photosensitive material and an image receiving material is known. 
     A solvent application portion for forming an image having a tank storing a solvent for forming an image which is used for application to the photosensitive material is disposed within this kind of image forming apparatus, and further a heat developing and transferring portion comprising a heating drum and an endless pressing belt pressed into contact with the outside of the heating drum and rotating with the heating drum is disposed within the image forming apparatus. 
     A photosensitive material on which the image is exposed while being held and conveyed within the image forming apparatus is soaked in the tank in which water acting as the image forming solvent is stored at the image forming solvent application portion, and is fed to the heat developing and transferring portion after the water is applied thereon. On the other hand, the image receiving material is fed to the heat developing and transferring portion in the same manner as the photosensitive material. 
     In the heat developing and transferring portion, the photosensitive material after the water is applied thereon is put over the image receiving material and in this state wound around the outer periphery of the heating drum while in close contact thereto. Further, both materials are transferred between the heating drum and the endless pressing belt while being held therebetween, and the image is transferred to the image receiving material at the same time as the photosensitive material is heat developed, so that a predetermined image is formed (stored) on the image receiving material. 
     However, in the case where the photosensitive material is soaked in the tank in which the water acting as the image forming solvent is stored, once the water cames into contact with the photosensitive material, it becomes constantly stored in the tank. As a result of this, bacteria using traces of organic material released from the photosensitive material as a nutrition source grow in the tank so that the water is made dirty. There is thus a risk that the image forming apparatus itself deteriorates and the image quality drops. 
     Accordingly, a method in which the water supply side, such as the tank, is not in contact with the photosensitive material, and a nozzle plate having nozzles is vibrated so that small water drops are injected from an injector to the photosensitive material and is applied thereto has been thought of. 
     However, when only the photosensitive material is transferred by a transfer roller, and water drops are simply injected, it is not possible to maintain an even clearance between the injector and the photosensitive material when injecting water drops. Accordingly, the photosensitive material gets too close or too far from the injector, and portions in which the water is not sufficiently supplied arise on the photosensitive material. It is hard to apply the water to the photosensitive material uniformly. 
     Further, after the water is applied to the photosensitive material and before it permeates into the photosensitive material, there is a risk that the image quality of the photosensitive material is lost when the transfer roller or the like comes into contact with the application surface of the photosensitive material. Accordingly, there is a necessity for transfer with no contact occurring with the photosensitive material after water application or a necessity to heat the photosensitive material so as to accelerate water permeation. 
     Further, a transfer roller is generally disposed downstream of the photosensitive material in the transfer direction with respect to the injector and the photosensitive material is further transferred by the transfer roller. However, when the photosensitive material enters into the transfer roller, the photosensitive material is given a shock due to a difference in transfer speed and the like, so that this also makes it hard to uniformly apply the water on the photosensitive material. 
     On the other hand, when the injector is filled with the water, bubbles tend to adhere to the inner wall of the injector, and bubbles entering from the nozzles along with injected water drops adhere to the inner wall of the injector and remain there. Accordingly, there is a risk of pressure loss through bubbles and deterioration of atomization is generated during the atomizing operation of the injector, causing blocking of the nozzles. 
     Because of this, as mentioned above, portions free of water appear on the photosensitive material, so that uniform coating of the photosensitive material is difficult. 
     Further, in the case where the structure that the nozzle plate having the nozzle hole is disposed between a pair of lever mechanisms in such a manner as to stride thereover and a water drop is injected by displacing the nozzle plate by means of an actuator, a space for freely swinging the lever mechanism is required in the injector. As a result of this, bumps and pits exist on the inner wall surface of the injector and the bubbles adhere well to the inner wall surface, so that the deterioration in atomization is more easily generated during the atomizing operation of the injector. 
     SUMMARY OF THE INVENTION 
     Taking the above described facts into consideration, the first object of the present invention is to obtain an image forming apparatus for uniformly applying an image forming solvent to an image recording material and improving image quality of an image on the image recording material. Further, a second object of the present invention is to obtain a fluid injecting apparatus for uniformly applying an image forming solvent to an image recording material. 
     In accordance with the first aspect of the present invention, there is provided an image forming apparatus comprising an injector disposed in opposition to the transfer path of an image recording material and injecting an image forming solvent onto the image recording material, and a guide member having a suction hole for suction, disposed in opposition to the injector with respect to the transfer path for the image recording material and guiding the image recording material by sucking through sucking holes. 
     In accordance with the above image forming apparatus, the following function can be achieved. 
     The injector disposed in opposition to the transfer path of the image recording material injects the image forming solvent toward the image recording material. Further, the image recording material is sucked by the suction holes of the guide member which is disposed in the side opposite to the injector with respect to the transfer path of the image recording material, and the image recording material is transferred while being guided by the guide member. 
     Accordingly, since the guide member guides the image recording material by sucking through the suction holes, the clearance between the injector and the image recording material is kept constant when the image forming solvent is injected. In the case where a predetermined clearance can not be maintained due to the curl of the image recording material or the like, there is a risk that the image forming solvent does not adhere uniformly because the image recording material gets too close or too far from the injector. 
     However, in the present invention, since the clearance is kept constant, portions where the image forming solvent does not adhere are not generated on the image recording material. The image forming solvent can be applied to the image recording material uniformly. 
     Further, the guide member for guiding the image recording material while sliding the image recording material by sucking with suction holes, is disposed on the side opposite the injector with respect to the transfer path of the image recording material corresponding to the side opposite the non-application surface on which the image forming solvent is not applied. Because of this, since it is not necessary to make the transfer roller or the like touch the application surface after the image forming solvent is applied to the image recording material and before the image forming solvent is permeated into the image recording material, the image quality of the image on the image recording material does not deteriorate. 
     In accordance with a second aspect of the present invention, there is provided an image forming apparatus comprising an injector disposed in opposition to the transfer path of image recording material and injecting an image forming solvent onto the image recording material, and a heating member having suction holes for suction, disposed in opposition to the injector with respect to the transfer path for the image recording material and heating the image recording material by suction by means of the sucking holes so as to bring the image recording material into close contact with the heating member. 
     In accordance with the above image forming apparatus, the following function can be achieved. 
     The injector disposed opposite the transfer path of the image recording material injects the image forming solvent toward the image recording material. Further, the image recording material is sucked by the suction holes of the heating member which is disposed in the side opposite the injector with respect to the transfer path of the image recording material, and the image recording material is heated on the transfer path by the heating member. 
     Accordingly, since the heating member sucks the image recording material through the suction holes and the image recording material is brought into close contact with the heating member, a clearance between the injector and the image recording material is kept constant when the image forming solvent is injected. Accordingly, the image forming solvent can be uniformly applied onto the image recording material in the same manner as that in the first aspect. 
     Further, the heating member for heating the image recording material is disposed in the side opposite the injector with respect to the transfer path of the image recording material corresponding to the side opposite the non-application surface on which the image forming solvent is not applied. Accordingly, since it is not necessary to make the transfer roller or the like touch the application surface after the image forming solvent is applied to the image recording material and before the image forming solvent is permeated into the image recording material, and the image recording material is heated by the heating member so as to permeate the image forming solvent into the image recording material in a short time, the quality of the image on the image recording material deteriorates even less. 
     In accordance with a third aspect of the present invention, there is provided an image forming apparatus comprising an injector disposed opposite the transfer path of an image recording material and injecting an image forming solvent onto the image recording material, a transfer roller disposed downstream of the image recording material in the transfer direction with respect to the injector and transferring the image recording material to which the image forming solvent is injected, a guide member having suction holes for suction, disposed opposite the injector with respect to the transfer path for the image recording material and between the injector and the transfer roller and guiding the image recording material together with suction by means of the sucking holes. 
     In accordance with the above image forming apparatus, the following function can be achieved. 
     The injector disposed in opposition to the transfer path of the image recording material injects the image forming solvent toward the image recording material. The image recording material to which the image forming solvent is injected is transferred by the transfer roller disposed in the downstream side of the image recording material in the transfer direction with respect to the injector. 
     Further, the guide member is disposed in the side opposite the injector with respect to the transfer path of the image recording material and between the injector and the transfer roller, and the image recording material is sucked by the suction holes of the guide member, so that the image recording material is transferred while being guided by the guide member. 
     Accordingly, the image forming solvent can be uniformly applied to the image recording material in the manner of the first aspect and the image quality of the image on the image recording material is not reduced. 
     Further, the guide member for guiding the image recording material by sucking the image recording material by means of the suction holes is disposed between the injector and the transfer roller. Accordingly, since the image recording material is sucked by the suction holes, even when any shock is added to the image recording material at a time when the image recording material enters into the transfer roller, the shock is not transmitted to the portion of the image recording material positioned in opposition to the injector. As a result of this, it is possible to apply the image forming solvent to the image recording material more uniformly. 
     In accordance with a fourth aspect of the present invention, there is provided a fluid injecting apparatus comprising an injecting tank disposed opposite a transfer path of an image recording material and storing an image forming solvent, a filling material filled within the injecting tank and forming an inner wall surface of the injecting tank with a smoothly curved surface, and a nozzle plate disposed in the injecting tank as a part of the wall surface of the injecting tank opposing the transfer path of the image recording material, having a plurality of nozzle holes for injecting an image forming solvent and oscillating to inject the image forming solvent from the plurality of nozzle holes. 
     In accordance with the above image forming apparatus, the following function can be achieved. 
     The image forming solvent is stored within the injecting tank having the inner wall surface formed by the smoothly curved surface of the filling material, and the injecting tank is disposed opposite the transfer path of the image recording material. The nozzle plate having the plurality of nozzle holes for injecting the image forming solvent is disposed in the injecting tank as a part of the wall surface of the injecting tank which opposes the transfer path of the image recording material, and the nozzle plate oscillates so that the image forming solvent is injected from the plurality of nozzle holes. 
     On the other hand, when the injecting tank is filled with the image forming solvent, the bubbles are attached to the wall surface of the injecting tank, the nozzle holes are provided in a part of the wall surface of the injecting tank, so that the bubbles presumably enter the injecting tank from the nozzle holes when the image forming solvent is injected. However, since the inner wall surface of the injecting tank is formed of a smoothly curved surface of the filling material, the bubbles rise within the injecting tank and leave the injecting tank without adhering to and accumulating on the inner wall surface of the injecting tank. 
     Accordingly, since the pressure loss together with compression of the bubbles during the atomizing operation does not occur, the deterioration in atomization due to image forming solvent not leaving the nozzle holes does not occur. This means that the portion where the image forming solvent does not adhere to the image recording material does not appear. 
     As a result of this, the image forming solvent can be applied to the image recording material uniformly. 
     In accordance with a fifth aspect of the present invention, there is provided a fluid injecting apparatus comprising an injecting tank disposed opposite a transfer path of an image recording material and storing an image forming solvent, a filling material filled within the injecting tank and forming an inner wall surface of the injecting tank with a smoothly curved surface, a nozzle plate disposed in the injecting tank as a part of the wall surface of the injecting tank opposing the transfer path of the image recording material and having a plurality of nozzle holes for injecting an image forming solvent, and an actuator for oscillating the nozzle plate along a direction toward the image recording material on the transfer path. 
     In accordance with the above image forming apparatus, the following function can be achieved. 
     The present aspect achieves the same function as that of the fourth aspect. However, in this aspect, since the actuator oscillates the nozzle plate along the direction toward the image recording material on the transfer path, the image forming solvent filled in the injecting tank is injected from the plurality of nozzle holes in correspondence to the motion of the actuator. 
     Accordingly, it is considered that the bubbles enter the injecting tank from the nozzle holes. However, in the manner of the fourth aspect, the bubbles rise within the injecting tank and leave the injecting tank without adhering to and accumulating on the inner wall surface of the injecting tank. As a result of this, in the same manner as that of the fourth embodiment, the image forming solvent can be applied to the image recording material uniformly. 
     In accordance with a sixth aspect of the present invention, there is provided a fluid injecting apparatus comprising an injecting tank disposed opposite a transfer path of an image recording material and storing an image forming solvent, a nozzle plate disposed in the injecting tank as a part of the wall surface of the injecting tank opposing the transfer path of the image recording material and having a plurality of nozzle holes for injecting an image forming solvent, a displacement transmitting member connected to an end portion of the nozzle plate, a supporting portion disposed between the wall surface of the injecting tank and the displacement transmitting member and supporting the displacement transmitting member in such a manner as to swing freely, an actuator disposed at a position of the displacement transmitting member in correspondence to the plurality of nozzle holes with respect to the supporting portion in a contact manner and swinging the displacement transmitting member around the supporting portion so as to press the image forming solvent within the injecting tank by means of the nozzle plate connected to the displacement transmitting member, and an elastic member filled in a portion between the wall surface of the injecting tank and the displacement transmitting member, elastically deformed so as to swing the displacement transmitting member around the supporting portion and filling a space between the wall surface of the injecting tank and the displacement transmitting member so as to make the inner wall surface of the injecting tank a smoothly curved wall surface. 
     In accordance with the above image forming apparatus, the following function can be achieved. 
     The injecting tank storing the image forming solvent is disposed opposite the transfer path of the image recording material. The nozzle plate having the plurality of nozzle holes for injecting the image forming solvent is disposed in the injecting tank as a part of the wall surface of the injecting tank opposing the transfer path of the image recording material. 
     Further, the displacement transmitting member connected to the end portion of the nozzle plate is supported by the supporting portion in such a manner as to swing freely and the actuator swings the displacement transmitting member around the supporting portion, so that the nozzle plate connected to the displacement transmitting member presses the image forming solvent within the injecting tank. 
     The elastic material filled in the portion between the wall surface of the injecting tank and the displacement transmitting member elastically deforms at a time of oscillation of the displacement transmitting member around the supporting portion so as not to prevent the swing. Then, the elastic member fills the space between the wall surface of the injecting tank and the displacement transmitting member so as to make the inner wall surface of the injecting tank the smoothly curved wall surface. 
     Accordingly, since the displacement transmitting member is swung around the supporting portion together with the operation of the actuator, the portion on the nozzle plate in correspondence to the plurality of nozzle holes is displaced so that the image forming solvent filled in the injecting tank is injected from the plurality of nozzle holes. 
     Together with this, it is considered that the bubbles enter the injecting tank from the nozzle holes. However, since the inner wall surface of the injecting tank is made of the smoothly curved wall surface by the elastic member, the bubbles rise within the injecting tank and leave the injecting tank without adhering to and accumulating on the inner wall surface of the injecting tank. 
     Accordingly, since pressure loss along with compression of the bubbles during the atomizing operation does not occur, the deterioration in the atomization due to image forming solvent not leaving the nozzle holes does not occur. This means that the portion where the image forming solvent does not adhere to the image recording material does not appear. 
     As a result of this, it is possible to apply the image forming solvent to the image recording material uniformly. 
     In accordance with the seventh aspect of the present invention, there is provided an image forming apparatus comprising an injector which is disposed so as to oppose the conveying path of an image recording material and injects an image forming solvent onto the image recording material; and a guide member applied an adhesive material thereto, disposed on the opposite side of the conveying path with respect to the injector, and guiding the image recording material. 
     In accordance with the eighth aspect of the present invention, there is provided an image forming apparatus comprising an injector which is disposed so as to oppose the conveying path of an image recording material and injects an image forming solvent onto the image recording material; and a guide member, disposed on the opposite side of the conveying path with respect to the injector, and guiding the image recording material, wherein the guide member is a plurality of suction members for suction the image recording material. 
     In accordance with the ninth aspect of the present invention, there is provided an image forming apparatus comprising an injector which is disposed so as to oppose the conveying path of an image recording material and injects an image forming solvent onto the image recording material; and a guide member, disposed on the opposite side of the conveying path with respect to the injector, and guiding the image recording material. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a schematic view of a total structure of an image recording apparatus in accordance with a first embodiment of the present invention. 
     FIG. 2 is a schematic view of a total structure of an application apparatus in accordance with the first embodiment of the present invention. 
     FIG. 3 is an enlarged perspective view of an injecting tank in accordance with the first embodiment of the present invention. 
     FIG. 4 is a bottom elevational view showing a state in which a photosensitive material is transferred under the injecting tank in accordance with the first embodiment of the present invention. 
     FIG. 5 is an enlarged schematic view of a main portion in FIG.  4 . 
     FIG. 6 is a cross sectional view which shows the injecting tank in accordance with the first embodiment of the present invention. 
     FIG. 7 is a cross sectional view showing a state in which water is injected from the injecting tank in accordance with the first embodiment of the present invention. 
     FIG. 8 is a perspective view which shows the application apparatus in accordance with the first embodiment of the present invention. 
     FIG. 9 is a perspective view showing the application apparatus in accordance with the first embodiment of the present invention, in which a state that a photosensitive material is heated is shown. 
     FIG. 10 is an enlarged schematic view which shows a heat developing and transferring portion in accordance with the first embodiment of the present invention. 
     FIG. 11 is a schematic view which schematically shows a total structure of an image recording apparatus in accordance with a second embodiment of the present invention. 
     FIG. 12 is a schematic view of a total structure of an application apparatus in accordance with the second embodiment of the present invention. 
     FIG. 13 is a cross sectional view of an injecting tank in accordance with the second embodiment of the present invention. 
     FIG. 14 is a cross sectional view showing a state in which water is injected from the injecting tank in accordance with the second embodiment of the present invention. 
     FIG. 15 is an enlarged cross sectional view which shows a main portion of the injecting tank in accordance with the second embodiment of the present invention. 
     FIGS. 16A,  16 B and  16 C are schematic views which explain an assembly of the injecting tank in accordance with the second embodiment of the present invention, in which FIG. 16A is a schematic view which shows a state before a pair of frames are combined therewith, FIG. 16B is a schematic view which shows a filling of an elastic material, and FIG. 16C is a schematic view which shows a mounting of a nozzle plate. 
     FIG. 17 is an enlarged schematic view which shows a main portion of a disposition of nozzle holes in an injecting tank in accordance with a third embodiment of the present invention. 
     FIG. 18 is a schematic view of a total structure of an image recording apparatus relating to a fourth embodiment of the present invention. 
     FIG. 19 is a schematic view of a total structure of an application apparatus relating to a fifth embodiment of the present invention. 
     FIG. 20 is an explanatory view which explains a droplet sensor relating to the fifth embodiment of the present invention. 
     FIG. 21 is an enlarged cross-sectional view of a main portion of an injecting tank relating to the fifth embodiment of the present invention. 
     FIG. 22 is a diagram which shows a conveying system of an application apparatus relating to a sixth embodiment of the present invention. 
     FIG. 23 is a diagram which shows a conveying system of an application apparatus relating to a seventh embodiment of the present invention. 
     FIG. 24 is a diagram which shows a conveying system of an application apparatus relating to an eighth embodiment of the present invention. 
     FIG. 25 is a diagram which shows a conveying system of an application apparatus relating to a ninth embodiment of the present invention. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     FIG. 1 is a schematic view of the total structure of an image recording apparatus  10  which corresponds to an image forming apparatus in accordance with a first embodiment of the present invention. 
     A sensitive magazine  14  for receiving a photosensitive material  16  is disposed within a machine casing  12  of the image recording apparatus  10  shown in the drawing, and the photosensitive material  16  is taken up to the sensitive magazine  14  in a roll manner so that a photosensitive (an exposure) surface of the photosensitive material  16  taking out from the sensitive magazine  14  is directed leftward. 
     A nip roller  18  and a cutter  20  are disposed near a take-out port of the sensitive magazine  14 , thereby cutting the photosensitive material  16  after a predetermined length of photosensitive material  16  is taken out from the sensitive magazine  14 . The cutter  20  is, for example, a circular type cutter comprising a fixed blade and a moving blade, in which the photosensitive material  16  can be cut by vertically moving the moving blade by means of a rotary cam and the like and engaging with the fixed blade. 
     A plurality of transfer rollers  24 ,  26 ,  28 ,  30 ,  32  and  34  are successively disposed downstream of the photosensitive material  16  in a transfer direction with respect to the cutter  20 , and a guide plate (not shown in FIG. 1) is disposed between the respective transfer rollers. The photosensitive material  16  cut at a predetermined length is transferred to an exposing portion  22  provided between the transfer rollers  24  and  26 . 
     An exposing apparatus  38  is provided in the left hand side of the exposing portion  22 . Three kinds of LD, lens unit, polygon mirror and mirror unit (these are omitted from the drawing) are disposed in the exposing apparatus  38 , and a ray C is fed to the exposing portion  22  from the exposing apparatus  38 , and so that the photosensitive material  16  is exposed. 
     Further, a U-turn portion  40  for curving the photosensitive material  16  in a U-shaped manner and for transferring it, and a water application portion  50  for applying an image forming solvent are provided above the exposing portion  22 . In this case, water is used for the image forming solvent in the present embodiment. 
     Each of the photosensitive materials  16  ascending from the sensitive magazine  14  and exposed in the exposing portion  22  is held between the transfer rollers  28  and  30  and transferred thereby so as to pass through the transfer path near the above portion of the U-turn portion  40  and so as to be sent to the water application portion  50 . 
     On the other hand, as shown in FIG. 2, an injecting tank  312  corresponding to an injector constituting a part of an application apparatus  310  corresponding to a fluid injecting apparatus is disposed at a position opposing a transfer path D of the photosensitive material  16  in the water application portion  50 . 
     Further, as shown in FIG. 2, a water bottle  332  storing water for supplying the injecting tank  312  is disposed in the left lower portion of the injecting tank  312 , and a filter  334  for filtering the water is disposed in the upper portion of the water bottle  332 . Further, a water feeding pipe  342  having a pump  336  disposed in the middle connects the water bottle  332  with the filter  334 . 
     Further, a sub tank  338  storing the water fed from the water bottle  332  is disposed in the right portion of the injecting tank  312  and a water feeding pipe  344  is extended from the filter  334  to the sub tank  338 . 
     Accordingly, when the pump  336  is operated, the water is fed from the water bottle  332  to the filter  334  and the filtered water passing through the filter  334  is fed to the sub tank  338  so that the water is temporarily stored in the sub tank  338 . 
     Still further, a water feeding pipe  346  connecting between the sub tank  338  and the side portion of one end of the injecting tank  312  is disposed therebetween, so that the water fed through the filter  334 , the sub tank  338 , the water feeding pipe  346  and the like from the water bottle  332  by the pump  336  is filled within the injecting tank  312 . 
     A tray  340  formed like a groove and connected to the water bottle  332  by a circulating pipe  348  is disposed in the lower portion of the injecting tank  312  in FIG.  2 . That is, in the side opposing the injecting tank  312  with respect to the transfer path D of the photo sensitive material  16 . Accordingly, water spilt from the injecting tank  312  is collected by the tray  340  and is returned to the water bottle  332  through the circulating pipe  348 . Further, the circulating pipe  348  is connected to the sub tank  338  in a state of projecting and extending to within the sub tank  338 , thereby returning more water than is necessary from where it is stored within the sub tank  338  to the water bottle  332 . 
     Further, as shown in FIGS. 2 and 8, a guide plate  352  supporting and guiding the photosensitive material  16  is disposed in the portion between the pair of transfer rollers  32  and the injecting tank  31  and opposite the injecting tank  312  with respect to the transfer path D of the photosensitive material  16 . 
     On the other hand, a box-like chamber  354  having a hollow space therewithin is disposed at a position opposite the injecting tank  312  with respect to the transfer path D of the photosensitive material  16  and downstream of the photosensitive material  16  in the transfer direction with respect to the injecting tank  312 . A heating plate  356  having a heater (not shown) and the like built in and having smooth plane plate shape covers over the chamber  354 , and a multiplicity of suction holes  358  extending through a portion between the inner portion and the outer portion of the chamber  354  are formed at regular intervals in the heating plate  356 . Accordingly, the heating plate  356  constitutes the guide member and the heating member. 
     Further, as shown in FIG. 8, a pair of fans  360  for sucking air into the chamber  354  are disposed at one end of the chamber  354 , and a duct  362  connects the chamber  354  with the fan  360 . 
     Accordingly, by operating the fan  360 , the air within the chamber  354  is sucked through the duct  362 , and together with this, the suction holes  358  in the heating plate  356  suck the non-application surface (the lower surface in FIG. 2) of the photosensitive material  16 , so that the heating plate  356  heats the photosensitive material  16  on the transfer path D and guides the photosensitive material  16 . 
     Further, the transfer roller  34  comprising a plurality of rollers for transferring the photosensitive material  16  after the water is injected is disposed downstream of the transfer path D for the photosensitive material  16  with respect to the injecting tank  312  and the heating plate  356 . 
     On the other hand, as shown in FIGS. 4 and 6, a bottom wall surface corresponding to a part of the wall surface of the injecting tank  312  becomes a portion opposing the transfer path D for the photosensitive material  16 , and a nozzle plate  322  formed by a plate member (for example, a thickness thereof is equal to or less than 60 μm) having a thin plate shape which has a rectangular shape and is capable of being elastically deformed is provided in the bottom wall surface of the injecting tank  312 . 
     Then, as shown in FIGS. 3 to  5 , a plurality of nozzle holes  324  (having a diameter, for example of from 10 μm to 200 μm) linearly disposed along a direction crossing the transfer direction A for the photosensitive material  16  at a constant interval are disposed in the nozzle plate  322  all around the width direction of the photosensitive material  16 . Accordingly, the water respectively filled within the injecting tank  312  by the nozzle holes  324  can be injected to the photosensitive material  16 . 
     Still further, a groove portion  322 A extending along a direction in which a plurality of nozzle holes  324  are linearly disposed is formed in a curved manner  50  as to increase rigidity of the nozzle plate  322  along the longitudinal direction corresponding to the direction that the plurality of nozzle holes  324  are disposed in the nozzle plate  322 . 
     On the other hand, as shown in FIGS. 2 and 3, an exhaust tube  330  extends from the upper portion of the injecting tank  312  corresponding to the side opposing to the portion to which the water feeding pipe  346  is connected, and the exhaust tube  330  can communicate the inner portion of the injecting tank  312  with the outer portion thereof. Further, a valve (not shown) for opening and closing the exhaust tube  330  is disposed at the middle of the exhaust tube  330 , and the portion within the injecting tank  312  can be communicated with the outer air and closed to the outer air by opening and closing the valve. 
     Both end portions of the nozzle plate  322  corresponding to end portions of the nozzle plate  322  positioned in a direction perpendicular to the longitudinal direction of the nozzle row formed by the linearly disposed plurality of nozzle holes  324  are respectively bonded to a pair of lever plates  320  corresponding to a displacement transfer member by an adhesive or the like, as shown in FIG.  6 . Then, the nozzle plate  322  and the pair of lever plates  320  are connected to each other by means of the adhesive. The pair of lever plates  320  are respectively fixed to a pair of side walls  312 A through a supporting portion  312 B extending along the direction in which the plurality of nozzle holes  324  respectively formed in the lower portion of the pair of side walls  312 A of the injecting tank  312  and having narrow width are linearly disposed. 
     On the other hand, parts of the pair of top walls  312 C brought into contact with each other and forming the top surface of the injecting tank  312  project to the outer side of the injecting tank  312  and a plurality of piezoelectric elements  326  (in the present embodiment, three in each side) corresponding to an actuator are bonded and disposed to the lower side of the projecting top wall  312 C. The outer end portion of the lever plate  320  corresponding to the portion of the lever plate  320  positioned opposite the plurality of nozzle holes  324  with respect to the supporting portion  312 B is bonded to the lower surface of the piezoelectric element  326 , so that the piezoelectric element  326  and the lever plate  320  are connected to each other. 
     Accordingly, the lever mechanism is constituted by the piezoelectric element  326 , the lever plate  320  and the supporting portion  312 B, and when the outer end portion of the lever plate  320  is moved by the piezoelectric element  326 , the lever plate  320  is swung around the supporting portion  312 B and the inner end portion of the lever plate  320  is moved to the direction opposite to the motion. In this case, the piezoelectric element  326  is formed by, for example, layered piezoelectric ceramics, so that an axial displacement of the piezoelectric element  326  is enlarged, and the piezoelectric element  326  is connected to a power source (not shown) in which timing of voltage application is controlled by a controller. Further, the valve for opening and closing the exhaust tube  330  mentioned above is also connected to the controller so that the controller controls the opening and closing operation of the valve. 
     On the other hand, each of the lever plates  320 , the side wall  312 A, the supporting portion  312 B and the top wall  312 C forms a part of a frame  314  integrally formed. As shown in FIG. 6, a pair of frames  314  are overlapped and screwed by a bolt (not shown) , so that a pair of lever plates  320 , a pair of side walls  312 A, a pair of top walls  312 C and a pair of supporting portions  312 B form an outer frame of the injecting tank  312  in a state that they are respectively disposed in an opposing manner to each other. 
     In this case, the frame  314  is made of a metal material such as aluminum, brass, magnesium and the like. 
     As mentioned above, a uniform and large amplitude of the nozzle plate  322  can be obtained along the direction in which a plurality of nozzle holes  324  are linearly disposed by small number of the piezoelectric elements  326 . Accordingly, the amplitude can be made such that amplitude distribution along the width direction of the photosensitive material  16  is uniform and the water pressure of the peripheral portion of each of the nozzle holes  324  reach the pressure capable of atomizing. As a result of this, the water can be injected and atomized to all around the width direction of the photosensitive material  16  from the plurality of nozzle holes  324  in a substantially equal manner. 
     Further, as shown in FIGS. 3 and 4, a thin seal plate  328  is disposed in a portion defined by the right and left ends of the nozzle plate  322  corresponding to the end portion of the nozzle plate  322  positioned in the longitudinal direction of the nozzle row formed by the nozzle holes  324  and the end portions of the pair of frames  314  in a state of being bonded to the pair of frames  314 . 
     Further, the inner portion of the seal plate  328  is filled with an elastic adhesive, for example, comprising a silicon rubber adhesive for the purpose of filling the gap between the right and left ends of the nozzle plate  322  and the end portions of the pair of frame  314 , and the seal plate  328  so as to prevent the water from leaking between these elements. Accordingly, the gap of the injecting tank  312  can be sealed by the elastic adhesive without preventing the right and left ends of the nozzle plate  322  from moving. In this case, the right and left ends of the injecting tank  312  may be sealed by only the elastic adhesive without using the thin seal plate  328 . 
     As mentioned above, when the piezoelectric element  326  is in contact with the power source, as shown in FIG. 7, the piezoelectric component  326  extends so as to rotate the lever plate  320  around the supporting portion  312 B. In accordance with this, the piezoelectric element  326  deforms and displaces the nozzle plate  322  in such a manner as to ascend the center portion of the nozzle plate  322  along an arrow B direction through the lever plate  320 . Then, together with this deformation of the nozzle plate  322 , the water pressure within the injecting tank  312  is increased so that a water drop L corresponding to a small amount of water is respectively injected from the nozzle holes  324  in a unit in a linear manner. 
     Further, the piezoelectric element  326  repeatedly makes contact so as to repeatedly extend the piezoelectric element  326 , so that the water drop L can be continuously injected from the nozzle holes  324 . 
     On the other hand, as shown in FIG. 1, an image receiving material magazine  106  for receiving an image receiving material  108  is disposed in the left upper end portion within the machine casing  12 . A coloring matter fixing material including a mordant is applied to the image forming surface of the image receiving material  108 , and the image receiving material  108  is taken up to the image receiving material magazine  106  in a roll manner so that the image forming surface of the image receiving material  108  taken out from the image receiving material magazine  106  is directly lowered. 
     A nip roller  110  is disposed near an image receiving material taking out port of the image receiving material magazine  106 , so that the nip roller  110  nips the image receiving material  108  so as to take out the image receiving material  108  from the image receiving material magazine  106  and to remove the nip operation. 
     A cutter  112  is disposed in the side of the nip roller  110 . The cutter  112  is a rotary type cutter comprising, for example, a fixed blade and a moving blade formed in the same manner as the cutter  20  for the photosensitive material mentioned above. Accordingly, the moving blade of the cutter  20  is vertically moved by means of the rotary cam and the like so as to be meshed with the fixed blade so that the image receiving material  108  taken out from the image receiving material magazine  106  can be cut to a length shorter than the photosensitive material  16 . 
     Transfer rollers  132 ,  134 ,  136  and  138  and a guide plate (not shown) are disposed in the side of the cutter  112 , so that the image receiving material  108  cut to a predetermined length can be transferred to a heat developing and transferring portion  120 . 
     As shown in FIGS. 1 and 10, the heat developing and transferring portion  120  are respectively wound around a plurality of winding rollers  140 , and each of them has a pair of endless belts  122  and  124  having a vertical direction for a longitudinal direction and formed as a loop. Accordingly, when any of the winding rollers  140  is driven and rotated, the pair of endless belts  122  and  124  wound around the winding rollers  140  are respectively rotated. 
     A heating plate  126  having a vertical direction for a longitudinal direction and formed as a plane plate shape is disposed within the loop of the right endless belt  122  in the drawing among the pair of endless belts  122  and  124  so as to oppose the inner peripheral portion in the left side of the endless belt  122 . A linear heater (not shown) is disposed within the heating plate  126 , and the temperature on the surface of the heating plate  126  is increased by this heater so as to heat to a predetermined temperature. 
     Accordingly, the photosensitive material  16  is fed to the portion between the pair of endless belts  122  and  124  of the heat developing and transferring portion  120  by means of the last transfer roller  34  in the transfer path. Further, the image receiving material  108  is transferred in a synchronous manner with the transfer of the photosensitive material  16 , and when the photosensitive material  16  goes a predetermined length forward, the photosensitive material  16  is fed to the portion between the pair of endless belts  122  and  124  of the heat developing and transferring portion  120  by means of the last transfer roller  138  in the transfer path, thereby being overlapped on the photosensitive material  16 . 
     In this case, since the image receiving material  108  is smaller in both width direction size and the longitudinal direction size than the photosensitive material  16 , they are overlapped in a state that all four lines of the peripheral portion of the photosensitive material  16  project from the peripheral portion of the image receiving material  108 . 
     As mentioned above, the photosensitive material  16  and the image receiving material  108  overlapped by the pair of endless belts  122  and  124  are held between the pair of endless belts  122  and  124  and transferred by the pair of endless belts  122  and  124  in a state of being overlapped. Further, at a time when the overlapped photosensitive material  16  and the image receiving material  108  are completely received in the portion between the pair of endless belts  122  and  124 , the pair of endless belts  122  and  124  temporarily stop rotating and the held photosensitive material  16  and the image receiving material  108  are heated by the heating plate  126 . The photosensitive material  16  is heated through the endless belt  122  and the heating plate  126  at a time of being held and transferred and of being stopped, and discharges a movable coloring matter together with the heating, and at the same time, the coloring matter is transferred to the coloring matter fixing layer of the image receiving material  108  so that the image can be obtained on the image receiving material  108 . 
     Further, a break away hook  128  is disposed in the downstream side in the material supply direction with respect to the pair of endless belts  122  and  124 . Accordingly, the break away hook  128  is engaged with only a front end portion of the photosensitive material  16  among the photosensitive material  16  and the image receiving material  108  held and transferred between the pair of endless belts  122  and  124 , thereby breaking the front end portion of the photosensitive material  16  projecting from the portion between the pair of endless belts  122  and  124  away from the image receiving material  108 . 
     A photosensitive material discharging roller  148  is disposed in the left portion of the break away hook  128  and is structured in such a manner as to transfer the photosensitive material  16  moved leftward while being guided by the break away hook  128  further to a waste photosensitive material receiving portion  150  end. 
     The waste photosensitive material receiving portion  150  has a drum  152  around which the photosensitive material  16  is wound and a belt  154  which is partially wound around the drum  152 . The belt  154  is wound around a plurality of rollers  156 , and the belt  154  is rotated by the rotation of these rollers  156  so that the drum  152  is accordingly rotated. 
     Accordingly, in a state that the belt  154  is rotated by the rotation of the rollers  156 , when the photosensitive material  16  is fed, it is structured such that the photosensitive material  16  can be collected around the drum  152 . 
     On the other hand, in FIG. 1, image receiving material discharging rollers  162 ,  164 ,  166 ,  168  and  170  are successively disposed in such a manner as to transfer the image receiving material  108  leftward from the lower portion of the pair of endless belts  122  and  124 . Accordingly, the image receiving material  108  discharged from the pair of endless belts  122  and  124  is transferred by these image receiving material discharging rollers  162 ,  164 ,  166 ,  168  and  170  so as to be discharged to a tray  172 . 
     Next, an operation of the present embodiment will be described below. 
     In the image recording apparatus  10  having the above structure, the nip roller  18  is operated after the photosensitive material magazine  14  is set, so that the photosensitive material  16  is taken out by the nip roller  18 . When the photosensitive material  16  is taken out at a predetermined length, the cutter  20  is operated, so that the photosensitive material  16  is cut at a predetermined length and is transferred to the developing portion  22  in a state of directing the photosensitive surface (the developing surface) leftward. Then, at the same time when the photosensitive material  16  passes through the developing portion  22 , the developing apparatus  38  is operated, so that the image is scanned and developed to the photosensitive material  16  positioned at the developing portion  22 . 
     After completion of the development, the developed photosensitive material  16  is fed to the water application portion  50 . In the water application portion  50 , the transferred photosensitive material  16  is fed to the injecting tank  312  by the operation of the transfer roller  32 , as shown in FIG.  4 . 
     Then, the water is attached to the photosensitive material  16  transferred along the transfer path D by the injection of the injecting tank  312 . Motion and operation at this time will be described below. 
     Then injecting tank  312  disposed opposite the transfer path D of the photosensitive material  16  and storing the water injects the water to the photosensitive material  16 . Further, the transfer roller  34  disposed downstream of the transfer path D of the photosensitive material  16  with respect to the injecting tank  312  further transfers the photosensitive material  16  after the water is injected. 
     Further, the heating plate  356  is disposed in the side opposite the injecting tank  312  with respect to the transfer path D of the photosensitive material  16  and between the injecting tank  312  and the transfer roller  34 . The photosensitive material  16  is sucked by the suction holes  358  of the heating plate  356  and heated by the heating plate  356  on the transfer path D, and the photosensitive material  16  is also guided and transferred by the heating plate  356 . 
     Concretely speaking, the photosensitive material  16  is fed while being slid on the heating plate  356  after being transferred by the transfer roller  32  shown in FIGS. 2 and 8 on the transfer path D and having water attached to the front end portion of the photosensitive material  16  by injection of the injecting tank  312 . As shown in FIG. 9, when the front end portion of the photosensitive material  16  is held between the transfer rollers  34 , the transfer of the photosensitive material  16  is stopped, for example, only for some seconds, and the photosensitive material  16  is heated by the heating plate  356 . 
     Thereafter, the transfer is restarted by the transfer roller  34 , so that the photosensitive material  16  is fed out from the heating plate  356 . 
     Accordingly, since the heating plate  356  sucks the photosensitive material  16  by the suction holes  358  and the photosensitive material  16  is brought into close contact with the heating plate  356  and the photosensitive material  16  is guided with sliding, a clearance K (shown in FIG. 6) between the injecting tank  312  and the photosensitive material  16  can be kept constant when the injecting tank  312  injects the water. Accordingly, portions where water is not attached are not generated on the photosensitive material  16 . The water can be applied to the photosensitive material  16  uniformly. 
     Accordingly, in the case where a predetermined clearance K can not be maintained due to the curl of the photosensitive material  16  and the like, the photosensitive material  16  goes too close to the injecting tank  312  or goes too far from the injecting tank  312 , so that there is a risk of water being applied unevenly. However, in the present embodiment, since the clearance K can be kept constant, the water can be applied to the photosensitive material  16  uniformly. 
     Further, the heating plate  356  is disposed in the side opposite the injecting tank  312  with respect to the transfer path D of the photosensitive material  16  corresponding to the side opposite the non-application surface to which water is not applied. Accordingly, it is not necessary to transfer the photosensitive material in a state of bringing the transfer roller and the like into contact with the application surface corresponding to the photosensitive surface after the water is applied to the photosensitive material  16  and before the water is permeated into the photosensitive material  16 , and the water can be permeated into the photosensitive material  16  for a short time by heating the photosensitive material  16  by means of the heating plate  356 , so that the image quality of the image on the photosensitive material  16  is not deteriorated. 
     Further, the heating plate  356  for sucking and guiding the photosensitive material  16  by the suction holes  358  is disposed between the injecting tank  312  and the transfer roller  34 . Accordingly, since the photosensitive material  16  is sucked into the suction holes  358 , even when the shock is applied to the photosensitive material  16  at a time when the photosensitive material  16  enters into the transfer roller  34  so as to be held therebetween, the impact is not transmitted to the portion of the photosensitive material  16  positioned opposite the injecting tank  312 . As a result of this, the water can be more uniformly applied to the photosensitive material  16 . 
     In this case, before the water is injected by the injecting tank  312 , at first, the valve of the exhaust tube  330  is closed by the controller. At the time of atomizing and injecting the water in this state, voltage is applied to the piezoelectric element  326  by making contact by means of the power source controlled by the controller, so that all the piezoelectric elements  326  are distorted so as to stretch at the same time. 
     Then, the plurality of piezoelectric elements  326  are extended and compressed at the same time, the portion of the nozzle plate  322  disposed in around the nozzle holes  324  positioned in a state of being held between the pair of lever plates  320  is oscillated toward the photosensitive material  16  on the transfer path D (in this case, moving in the direction shown by the arrow B in FIG. 7) together with the respective swing motion of the pair of lever plates  320  around the supporting portion  312 B, so that the nozzle plates  322  pressurizes the water within the injecting tank  312 . 
     As mentioned above, in accordance with the motion of the piezoelectric element  326 , the water filled in the injecting tank  312  is injected from the plurality of nozzle holes  324 . As a result of this, the water filled in the injecting tank  312  is injected and atomized from the nozzle holes  324  as shown in FIG. 7 so as to be attached on the photosensitive material  16  while being transferred. 
     At this time, in accordance with the operation of the piezoelectric element  326 , since the lever plate  320  is swung around the supporting portion  312 B extending along the direction to which the plurality of nozzle holes  324  are linearly disposed, all of the portion in which the plurality of nozzle holes  324  of the nozzle plate  322  are provided is uniformly displaced. 
     Accordingly, the nozzle holes  324  can be stably displaced along the longitudinal direction of the nozzle row formed by the linearly disposed plurality of nozzle holes  324  as a unit at the same displacing amount, so that the water filled in the injecting tank  312  is uniformly injected from the plurality of nozzle holes  324 . Accordingly, portions where water is not attached are even less likely to arise on the photosensitive material  16 . 
     On the other hand, since the injecting tank  312  has the nozzle holes  324  and the water is injected from the nozzle holes  324 , in comparison with the application apparatus which is structured such as to soak the photosensitive material and the like into the tank storing the water and to apply the water, it is possible to apply the water with a little amount of water and it is also possible to dry the photosensitive material  16  in a short time. 
     Further, since the injecting tank  312  has the plurality of nozzle holes  324  disposed all around the width direction of the photosensitive material  16  and the water is injected from the nozzle holes  324  at the same time through a single deformation by means of the piezoelectric element  326 , the water can be widely applied all around the width direction of the photosensitive material  16  in a single injection. Accordingly, it is not necessary to scan the nozzle plate  322  on the two-dimensional plane, and the large area application can be performed in a short time, so that the application time can be reduced. 
     Still further, as well as the transfer speed of the photosensitive material  16 , the water can be applied to all of the surface of the photosensitive material  16  by injecting the water from the nozzle holes  324  at decided on times a number of times. When the water is injected from the nozzle holes  324  of the nozzle plate  322 , the water within the injecting tank  312  is reduced gradually. However, since the sub tank  338  has a function of supplying water and keeping the water level within the injecting tank  312  constant, water is supplied from the sub tank  338  so that the water pressure within the injecting tank  312  during the atomization can be kept constant, thereby securing continuous water injection. 
     Thereafter, the photosensitive material  16  to which the water is applied in the water application portion  50  for the image forming solvent is fed to the portion between the pair of endless belts  122  and  124  of the heat developing and transferring portion  120  by the transfer roller  34 . 
     On the other hand, scanned and developed when the photosensitive material  16 , the image receiving material  108  is also taken out from the image receiving material magazine  106  by the nip roller  110  and transferred. When the image receiving material  108  is taken out at a predetermined length, the cutter  112  is operated so that the image receiving material  108  is cut into a predetermined lengths. 
     After the cutter  112  is employed, the cut image receiving material  108  is transferred by the transfer rollers  132 ,  134 ,  136  and  138  while being guided by the guide plate. Once the front end portion of the image receiving material  108  is held between the transfer rollers  138 , the image receiving material  108  is on standby immediately before the heat developing and transferring portion  120 . 
     Then, because the photosensitive material  16  is fed into the portion between the pair of endless belts  122  and  124  by the transfer roller  34  as mentioned above, the transfer of the image receiving material  108  is restarted, so that the image receiving material  108  is fed to the portion between the pair of endless belts  122  and  124  as a unit with the photosensitive material  16 . 
     As a result of this, since the photosensitive material  16  and the image receiving material  108  overlap and the photosensitive material  16  and the image receiving material  108  are held and transferred while being heated by the heating plate  126 , the image is thermally developed and transferred so as to be formed on the image receiving material  108 . 
     Further, when these are discharged from the pair of endless belts  122  and  124 , the break away hook  128  is engaged with the front end portion of the photosensitive material  16  which is transferred at a predetermined length prior to the image receiving material  108 , so as to break away the front end portion of the photosensitive material  16  from the image receiving material  108 . The photosensitive material  16  is further transferred by the photosensitive material discharging roller  148  and is collected within the waste photosensitive material receiving portion  150 . At this time, since the photosensitive material  16  dries quickly, it is not necessary to further provide a kind of heater for drying the photosensitive material  16 . 
     On the other hand, the image receiving material  108  separated from the photosensitive material  16  is transferred by the image receiving material discharging rollers  162 ,  164 ,  166 ,  168  and  170  so as to be discharged to the tray  172 . 
     Then, in the case that a recording operation of a plurality of images is performed, the above processes are successively and continuously performed. 
     As mentioned above, the image receiving material  108  held between the pair of endless belts  122  and  124  and thermally developed and transferred so that a predetermined image is formed (recorded) is held between the plurality of image receiving material discharging rollers  162 ,  164 ,  166 ,  168  and  170  and transferred so as to be taken out of the apparatus after being discharged from the pair of endless belts  122  and  124 . 
     Next, an image forming apparatus and a liquid injecting apparatus in accordance with a second embodiment of the present invention will be shown in the drawings and be described below. In this case, the same reference numerals are attached to the same elements described in the first embodiment and the explanation thereof will be omitted. 
     As shown in FIG. 11 which shows total structure of an image recording apparatus schematically in accordance with the second embodiment and FIG. 12 showing schematically a total structure of an application apparatus in accordance with the second embodiment, the injecting tank  312  is substantially the same in structure as that of the first embodiment and is provided within the image recording apparatus  10 . 
     The tray  340  connected to the water bottle  332  by the circulating pipe  348  is disposed in the lower portion of the injecting tank  312 , so that it is structured such that the water overflowing from the injecting tank  312  is collected by the tray  340  and is returned to the water bottle  332  through the circulating pipe  348 . Further, the circulating pipe  348  is connected to the sub tank  338  in a state of projecting and extending within the sub tank  338  so as to return the extra water collected within the sub tank  338  to the water bottle  332 . 
     Further, as shown in FIGS. 4 and 13 explaining the first embodiment, the nozzle plate  322  made of the thin plate material (for example, the thickness thereof is equal to or less than 60 μm) having a rectangular shape and elastically deforming characteristic is disposed in the portion opposite the transfer path D of the photosensitive material  16  corresponding to the bottom wall surface which is a part of the wall surfaces of the injecting tank  312 . 
     Still further, as in the same manner as shown in FIGS. 3 to  5  corresponding to the first embodiment, the plurality of nozzle holes  324  linearly disposed along the direction crossing the transfer direction A of the photosensitive material  16  at a constant interval are disposed in the nozzle plate  322  all around the width direction of the photosensitive material  16 . Further, in the same manner as the first embodiment, the groove portion  322 A is formed in the injecting tank  312  and the exhaust tube  330  extends from the upper portion of the injecting tank  312 . 
     Both end portions of the nozzle plate  322  corresponding to the end portion of the nozzle plate  322  positioned in the direction perpendicular to the longitudinal direction of the nozzle row formed by the linearly disposed plurality of nozzle holes  324  are respectively bonded to the pair of lever plates  320  corresponding to the displacement transmitting member by the adhesive and the like as shown in FIG.  13 . Then, by bonding and connecting in the above manner, the nozzle plate  322  and the pair of lever plates  320  are connected to each other. The pair of lever plates  320  are respectively fixed to the pair of tank body constituting members  312 A through the supporting portions  312 B each formed in the wall portion disposed in the lower portion of the pair of tank body constituting members  312 A of the injecting tank  312 , having a narrow width and extending along the direction in which the plurality of nozzle holes  324  are linearly disposed. 
     On the other hand, each of the opposing surfaces of the pair of tank body constituting members  312 A is formed as a smooth surface without bumps or indentations, and these opposing surfaces are brought into contact with each other with no gap so as to form the upper side portion of the injecting tank  312 . Further, the step portion  312 C projecting into the outside of the injecting tank  312  at a step is provided in each of the pair of tank body constituting members  312 A, so that the injecting tank  312  has a shape in which the upper portion above the middle portion in the vertical direction projects. 
     The plurality of piezoelectric elements  326  (three in each side in this embodiment) corresponding to the actuator are bonded and disposed in the lower side surface of the step portion  312 C. The outer end portion of the lever plate  320  corresponding to the portion of the lever plate  320  positioned while holding the supporting portion  312 B with respect to the plurality of nozzle holes  324  is bonded to the lower surface of the piezoelectric element  326 , so that the piezoelectric element  326  and the lever plate  320  are connected to each other. 
     Accordingly, the lever mechanism is constituted by these piezoelectric elements  326 , the lever plate  320  and the supporting portion  312 B, so that a groove portion  312 D for swing motion capable of swinging the lever plate  320  is respectively provided between the pair of lever plates  320  and the pair of tank body constituting members  312 A. Then, the elastic member  352  (for example, a silicon adhesive) constituted by the silicon rubber is respectively filled within the swing groove portion  312 D. 
     As mentioned above, when the outer end portion of the lever plate  320  is moved by the piezoelectric element  326 , the lever plate  320  is swung around the supporting portion  312 B, so that the inner end portion of the lever plate  320  moves in a direction opposing the motion. At this time, the elastic member  352  is sometimes compressed and stretched together with the swing motion of the lever plate  320 . It is elastically distorted and does not prevent the swing motion of the lever plate  320 . 
     On the other hand, each of the lever plates  320 , the tank body constituting member  312 A and the supporting portion  312 B forms a part of the integrally formed frame  314 . As shown in FIG. 13, the pair of frames  314  are overlapped and screwed by a bolt (not shown), so as to form the outer frame of the injecting tank  312  in a state that the pair of lever plates  320 , the pair of tank body constituting members  312 A and the pair of supporting portions  312 B are respectively disposed in such a manner as to be opposed to each other. In this case, the frame  314  is formed by an extruded material through aluminum extrusion molding. 
     Further, as shown in FIG. 15 showing the main portion of the injecting tank  312  in an enlarged manner, the space defined by the bottom surfaces of the pair of tank bodies constituting materials  312 A, the front end surfaces of the pair of lever plates  320  and the upper surfaces of the nozzle plates  322  and having a substantially rectangular cross sectional shape is formed within the injecting tank  312  and between the front end portions of the pair of lever plates  320 , and a solvent storing space  316  for storing the water is disposed within the space. 
     Then, the space is filled with the elastic member  354  (for example, the silicon adhesive) constituted by the silicon rubber in such a manner as to draw a smooth free curve with no unevenness, and the sealing performance around the swing groove portion  312 D can be secured by the elastic member  354 . 
     Further, a pair of recess portions  318  respectively constituting a part of the solvent storing space  316  are formed between the front end surface of the pair of lever plates  320  and the portion projecting upward in FIG. 15 by the groove portion  322 A formed on the nozzle plate  322 . 
     The surface adhesive  356  (for example, a thermoplastic sheet adhesive) for bonding between the lever plate  320  and the nozzle plate  322  with no gap is filled within the recess portion  318  in such a manner as to slightly project from the recess portion  318 , and the surface adhesive  356  and the elastic member  354  form the inner wall surface of the solvent storing space  316  for storing the water by the smoothly curved surface. 
     Accordingly, the filling material is constituted by the elastically deforming elastic members  352  and  354  and the surface adhesive  356 , so that the elastic material and the plastic material are filled within the swing groove portion  312 D and the solvent storing space  316 . Then, since the cross sectional shape shown in FIG. 13 of the solvent storing space  316  for storing the water in the injecting tank  312  is close to a smoothly curved circular tube shape, the bubbles do not tend to adhere to the inner portion of the injecting tank  312 . 
     On the other hand, the uniform and large amplitude of the nozzle plate  322  can be obtained along the direction in which the plurality of nozzle holes  324  are linearly disposed by the small number of piezoelectric elements  326 , as mentioned above. Accordingly, the amplitude can be made such that the amplitude distribution along the width direction of the photosensitive material  16  is uniform and the water pressure of the peripheral portion of each of the nozzle holes  324  reaches the pressure in which the atomization can be performed. As a result of this, it is possible to inject and atomize the water all around the width direction of the photosensitive material  16  from the plurality of nozzle holes  324  in a substantially uniform manner. 
     Next, an assembling of the injecting tank  312  in accordance with the present embodiment will be described below. 
     At first, the pair of symmetrical frames  314  are respectively formed by the extrusion molding of the aluminum as shown in FIG.  16 A. 
     The elastic member  352  is filled in the swing groove portion  312 D between the lever plate  320  and the tank body constituting member  312 A in a state that these frames  314  are in a single unit. In this case, since the elastic member  353  has non-fluidity in an initial state, the elastic member  352  does not flow out from the swing groove portion  312 D in an unprepared manner and hardens in about five minutes. 
     Further, the pair of frames  314  are fastened by the bolt (not shown) and are connected as shown in FIG. 16B, and in a state that the pair of frames  314  are inverted, the elastic member  354  having an initial viscosity of 2.5 Pa s and a hardening time of about five minutes is filled within the space between the pair of lever plates  320 . 
     Due to the initial flow of the elastic member  354 , the inner wall surface of the solvent storing space  316  is formed in the upper portion of the pair of tank body constituting member  312 A in such a manner as to draw a smooth free curve with no unevenness, thereby securing the sealing performance around the swing groove portion  312 D. 
     Thereafter, as shown in FIG. 16C, the nozzle plate  322  is bonded and mounted to the lever plate  320  of the frame  314 , and at this time, in a state of disposing the thermoplastic surface adhesive  356  for adhering between the lever plate  320  and the nozzle plate  322  in such a manner as to intentionally project from the recess portion  318 , these are heated and adhered. 
     Then, finally, the seal plate  328 , the piezoelectric element  326  and the like are mounted so that the assembly of the injecting tank  312  is completed. 
     Next, an operation of the present invention will be described below. 
     As in the same manner as that in the first embodiment, when the development of the photosensitive material  16  taken out from the sensitive material magazine  14  by the nip roller  18  is completed, the developed photosensitive material  16  is fed to the water application portion  50 . In the water application portion  50 , the transferred photosensitive material  16  is fed to the injecting tank  312  by the operation of the transfer roller  32 . 
     Then, the water is applied to the photosensitive material  16  transferred along the transfer path D by the injection of the injecting tank  312 , and the motion and operation at this time will be described below. 
     The injecting tank  312  storing the water is disposed in the upper portion of the transfer path D in such a manner as to oppose the transfer path D of the photosensitive material  16 . Then, the nozzle plate  322  in which the plurality of nozzle holes  324  injecting the water are lineally disposed is provided in the injecting tank  312  for the bottom wall surface of the injecting tank  312  opposing the transfer path D of the photosensitive material  16 . 
     Further, the pair of narrow lever plates  320  are respectively connected to both the end portions of the nozzle plate  322  disposed in the direction perpendicular to the direction in which the plurality of nozzle holes  324  are linearly disposed, and these pair of lever plates  320  are supported to the pair of supporting portions  312 B extending along the direction in which the plurality of nozzle holes  324  are linearly disposed in such a manner as to be swung. 
     Before the water is injected by the injecting tank  312 , at first the valve of the exhaust tube  330  is made in a closed state by the controller. At a time of atomizing and injecting the water in this state, the voltage is applied to the piezoelectric element  326  by making contact from the power source controlled by the controller, so that all the piezoelectric elements  326  are extended and distorted at the same time. 
     When the plurality of piezoelectric elements  326  are stretched and compressed at the same time, because the pair of lever plates  320  are respectively swung around the supporting portion  312 B, the portion of the nozzle plate  322  in the periphery of the nozzle holes  324  positioned in a state of being held between the pair of lever plates  320  is oscillated along the direction toward the photosensitive material  16  on the transfer path D (in this case, is moved to the direction shown in the arrow B in FIG.  14 ), so that the nozzle plate  322  pressurizes the water within the solvent storing space  316  of the injecting tank  312 . 
     As mentioned above, in correspondence to the operation of the piezoelectric element  326 , the water filled within the solvent storing space  316  of the injecting tank  312  is injected from the plurality of nozzle holes  324 . As a result of this, the water filled in the injecting tank  312  is injected and atomized from the nozzle holes  324  as shown in FIG. 14, so as to be attached on the photosensitive material  16  while being transferred. 
     At this time, the elastic material  352  filled in the portion between the lower wall surface of the pair of tank body constituting members  312 A and the pair of lever plates  320  is elastically distorted at a time of swinging around the supporting portion  312 B of the pair of lever plates  320  so as not to disturb the swing motion. Then, the elastic member  354  fills the space between the wall surface of the tank body constituting member  312 A and the pair of lever plates  320 , and the elastic member  354  and the surface adhesive  356  makes the inner wall surface of the solvent storing space  316  the smoothly curved wall surface. 
     In the above case, in accordance with the injection of the water, the bubbles sometimes enter the injecting tank  312  from the nozzle holes  324 . However, since the inner wall surface of the solvent storing space  316  of the injecting tank  312  is made into a gently curved wall surface by the elastic member  354  and the surface adhesive  356 , the bubbles do not adhere to the inner wall surface of the solvent storing space  316  and accumulate, but ascend within the injecting tank  312  and are discharged from the injecting tank  312  via the exhaust tube  330 . 
     Accordingly, since the pressure loss together with the compression of the bubbles is not generated during the atomizing operation in the injecting tank  312 , deterioration in atomization due to water not leaving from nozzle holes  324  does not occur, so that portions where water does not adhere do not arise on the photosensitive material  16 . 
     In other words, as a result of this, the water can be uniformly applied onto the upper surface of the photosensitive material  16  by the injecting tank  312  which is not in contact with the photosensitive material  16 . 
     Next, an enlarged view of the nozzle plate  322  of the injecting tank  312  in accordance with a third embodiment of the present invention is shown in FIG.  17  and an explanation thereof will be given below. In this case, the same reference numerals are attached to the same element as those in the first and second embodiments, and the explanation thereof will be omitted. 
     As shown in FIG. 17, the plurality of nozzle holes  324  injecting the water are disposed in the nozzle plate  322  of the injecting tank  312  in accordance with the present embodiment so that two rows of nozzles linearly disposed along the direction crossing the transfer direction A of the photosensitive material  16  at a constant interval are disposed in a zigzag manner. 
     Since the nozzle holes  324  are disposed in the above manner, not only are the same functions and effects as those of the first and second embodiments obtained. The application for two rows can also be performed with a single injection, so that the number of times the piezoelectric elements  326  are stretched and compressed can be reduced and efficient application can be achieved. 
     In the above second and third embodiments, the frame  314  is made of aluminum. However, it may be made of other metal materials such as brass, magnesium and the like. Further, the elastic member  352  and the elastic member  354  are not limited to the material shown in the embodiment. Other materials having elasticity, for example, rubber materials and the like may be employed. Still further, with respect to the surface adhesive  356 , as far as the function is satisfied, other materials may be employed. For example, a silicon rubber material may be employed in the same manner as the elastic members  352  and  354 . 
     Next, a schematic view of the total structure of an image recording apparatus  10  which is an image forming apparatus relating to a fourth embodiment of the present invention is shown in FIG. 18, and an explanation thereof will be given below. Members which are the same as those explained in the first embodiment are denoted by the same reference numerals, and repetitive explanations thereof are omitted. 
     As shown in FIG. 18, each of four leg portions  402  (FIG. 18 shows only two of them), in which a male screw is formed at the outer circumferential side, is screwed to a lower portion of a machine casing  12  of the image recording apparatus  10 . Further, a nut  404  and a nut  406  are screwed to this leg portion  402 . The nut  404  is screwed to the lower surface of the machine casing  12  in an abutment state and the nut  406  for preventing a slack is screwed to the lower surface of the nut  404 . 
     Accordingly, when the image recording apparatus  10  is provided on a floor surface  408  for operation, amounts of the leg portions  402  to be screwed to the machine casing  12  are adjusted such that the conveying path D of a photosensitive material  16  which opposes an injecting tank  312  is horizontal. The nut  406  and the nut  406  are screwed to the machine casing  12  in this horizontal state and the conveying path D is kept horizontal. 
     Thus, water serving as an image forming solvent can be injected vertically from the injecting tank  312  of an application apparatus  310  to the photosensitive material  16  on the conveying path D in accordance with gravity and, after water droplets are applied to the photosensitive material  16 , the water is deposited evenly onto the entire surface thereof. (If the conveying path D is not horizontal, after water droplets are applied to the photosensitive material  16 , the water is deposited onto a part of the surface thereof.) As a result, it is possible that a swelling of water is uniform, a chemical reaction is uniform, a contamination of the image recording apparatus  10  caused by the dropping of solution from the photosensitive material  16  is prevented, a conveying failure of the photosensitive material  16  is prevented, and the like. 
     Next, an image forming apparatus relating to a fifth embodiment of the present invention is shown in FIGS. 19 through 21, and an explanation thereof will be given below. Members which are the same as those explained in the first embodiment are denoted by the same reference numerals, and repetitive explanations thereof are omitted. 
     FIG. 19 shows the application apparatus  310  of the image recording apparatus  10  which is the image forming apparatus relating to the fifth embodiment. 
     As shown in FIG. 19, in the fifth embodiment, there are three tanks formed by a processing solution tank  412 , a washing solution tank  414 , and a water tank  416 . The passages from these three tanks to the injecting tank  312  can be switched by a switching valve  418 . Further, this switching valve  418  is connected to a controller  490  (FIG. 20) which controls the operation of the application apparatus  310 . 
     In short, there are a plurality of supply sources to the liquid injecting tank  312 , the operation of the switching valve  418  is controlled by the controller  490 , and the passages from the three tanks to the injecting tank  312  can be switched. When an image forming solvent is a processing solution other than water, the processing solution tank  412  is filled with this processing solution, the washing solution tank  414  is filled with a washing solution, and the water tank  416  is filled with water. 
     Moreover, as shown in FIG. 20, in the fifth embodiment, a droplet sensor  424  comprises a pair of electrodes  426  and a judge portion  428 . The electrodes  426  are disposed so as to contact end portions of the photosensitive material  16  which correspond to end portions of a nozzle row, and the judge portion  428  judges atomization failure by measuring a value of electrical resistance between these pair of electrodes  426 . (when atomization failure occurs, the value of electrical resistance between these pair of electrodes  426  changes.) This droplet sensor  424  is connected to the controller  490 . In this way, the atomization failure of the injecting tank  312  is detected by the droplet sensor  424 . 
     On the other hand, as shown in FIG. 21, a space which is defined by a pair of side walls  312 A, the distal end surfaces of a pair of lever plates  320 , and the upper surfaces of nozzle plates  322  is formed in the injecting tank  312 . Further, this space is filled with an elastic member  432  (e.g., a silicon adhesive) formed of a silicon rubber so as to form a gentle free curve without bumps or indentations, and the inner wall surface of a solvent storing space  434  for storing water is formed in a gently curved circular tube configuration by this elastic member  432 . 
     Moreover, a bubble discharging member  430 , in which cylindrical and arc-shaped concave portions  430 A are provided on the outer peripheral surface at equal intervals, is disposed within the solvent storing space  434  of the injecting tank  312 . The cross-sectional surface area of the solvent storing space  434  having a substantially circular cross section within the injecting tank  312  is thereby made small. Accordingly, even if bubbles enter the injecting tank  312  due to entering of the processing solution from one end of the injecting tank  312 , the flow rate of the processing solution within the solvent storing space  434  is increased by the bubble discharging member  430  and it is difficult for the bubbles to remain within the injecting tank  312 . 
     As described above, since it is difficult for the bubbles to remain within the injecting tank  312  by the bubble discharging member  430 , the processing solution is reliably ejected from respective nozzle holes  324 . Further, even if one of the nozzle holes  324  is clogged with the processing solution or the like and the processing solution L is not ejected, as shown in FIG. 20, the processing solution L on the photosensitive material  16  is broken off and atomization failure is detected by the droplet sensor  424 . Due to the detection by this droplet sensor  424 , the controller  490  operates the switching valve  418  shown in FIG.  19  and the passages from the three tanks  412 ,  414 ,  416  to the injecting tank  312  are switched. Consequently, the washing solution and the water for solving the clogging of the nozzle hole  324  caused by the processing solution or the like can be supplied in that order. 
     Next, a conveying system of the application apparatus  310  of the image recording apparatus  10  which is an image forming apparatus relating to a sixth embodiment of the present invention is shown in FIG. 22, and an explanation thereof will be given below. Members which are the same as those explained in the first embodiment are denoted by the same reference numerals, and repetitive explanations thereof are omitted. 
     As shown in FIG. 22, a conveying belt  444 , which is a conveying member and is wound around a pair of drive rollers  442 , is disposed on the opposite side of the conveying path of the photosensitive material  16  provided beneath the injecting tank  312  of the application apparatus  310  with respect to the injecting tank  312 . One of the pair of drive rollers  442  is connected to a drive source such as a motor or the like. As a result, the conveying belt  444  rotates due to the rotation of the drive source. 
     Further, a gel-typed material having adhesiveness is applied to the outer peripheral surface of this conveying belt  444  so that the photosensitive material  16  can be adhered temporarily to but peeled from the conveying belt  444 . Moreover, a heating plate  446  for heating the photosensitive material  16  via the conveying belt  444  is disposed between the pair of drive rollers  442  and at a position on the conveying direction downstream side of the photosensitive material  16  with respect to the injecting tank  312 . 
     Accordingly, when the photosensitive material  16  is conveyed from a photosensitive material magazine  14 , the photosensitive material  16  is disposed on the conveying belt  444  in a state in which a reverse surface of the photosensitive material  16  which is opposite a photosensitive surface thereof contacts the conveying belt  444 , and water is applied from the injecting tank  312  onto the photosensitive surface of the photosensitive material  16  in a state in which the photosensitive material  16  is disposed on the conveying belt  444 . Thereafter, since the conveying belt  444  is moved due to the rotation of the drive rollers  442 , this photosensitive material  16  is conveyed while the application surface, to which the water has been applied and which is the photosensitive surface of the photosensitive material  16 , is kept in a non-contact state. 
     In short, the application surface is kept in the non-contact state for a predetermined period of time by this conveying belt  444 . As a result, the length in which the application surface of the photosensitive material  16  is conveyed in the non-contact state can be increased, and accordingly, an area in which the application surface, to which the water has been applied, is heated in the non-contact state can be increased. 
     Further, because the gel-typed material having adhesiveness is applied to the outer circumferential surface of this conveying belt  444 , it is difficult for the photosensitive material  16  to be deviated from the conveying belt  444  and reliability at the time of conveying the photosensitive material  16  is high. 
     In the sixth embodiment, a description is given of a case in which the sheet-typed photosensitive material  16  is used. However, a roll-typed photosensitive material can be processed as well as the sheet-typed photosensitive material  16 . Moreover, since the heating plate  446  is used, the photosensitive material  16  is heated appropriately and the temperature thereof can be controlled. However, instead of the heating plate  446 , the photosensitive material  16  may be heated by a heat roller or by atmosphere in which the temperature of the entire surrounding atmosphere is increased. 
     Next, an image forming apparatus relating to a seventh embodiment of the present invention is shown in FIG. 23, and an explanation thereof will be given below. Members which are the same as those explained in the first embodiment are denoted by the same reference numerals, and repetitive explanations thereof are omitted. 
     As shown in FIG. 23, a conveying belt  454 , which is a conveying member and is wound around a pair of drive rollers  452 , is disposed on the opposite side of the conveying path of the photosensitive material  16  which is provided below the injecting tank  312  of the application apparatus  310  with respect to the injecting tank  312 . One of the pair of drive rollers  452  is connected to a drive source such as a motor or the like. 
     This conveying belt  454  is formed so that suction pads  454 A, which can suck the photosensitive material  16  at respective negative pressures or the like, are arranged in a belt shape. In a state in which the photosensitive material  16  is disposed on the group of suction pads  454 A, the group of suction pads  454 A are moved by the pair of drive rollers  452  and the photosensitive material  16  is conveyed. 
     As described above, since each of the suction pads  454 A sucks the photosensitive material  16 , it is difficult for the photosensitive material  16  to be deviated from the conveying belt  454  and reliability at the time of conveying the photosensitive material  16  is high. 
     Next, an image forming apparatus relating to an eighth embodiment of the present invention is shown in FIG. 24, and an explanation thereof will be given below. Members which are the same as those explained in the first embodiment are denoted by the same reference numerals, and repetitive explanations thereof are omitted. 
     In the eighth embodiment, as shown in FIG. 24, a plurality of conveying rollers  462 , which are conveying members, are disposed on the opposite side of the conveying path of the photosensitive material  16  which is provided below the injecting tank  312  of the application apparatus  310  with respect to the injecting tank  312 . As a result, the photosensitive material  16  can be reliably conveyed and reliability at the time of conveying the photosensitive material  16  is higher. 
     Next, an image forming apparatus relating to a ninth embodiment of the present invention is shown in FIG. 25, and an explanation thereof will be given below. Members which are the same as those explained in the first embodiment are denoted by the same reference numerals, and repetitive explanations thereof are omitted. 
     As shown in FIG. 25, a conveying belt  474 , which is a conveying member and is wound around a pair of drive rollers  472 , is disposed on the opposite side of the conveying path of the photosensitive material  16  which is provided below the injecting tank  312  of the application apparatus  310  with respect to the injecting tank  312 . One of the pair of drive rollers  472  is connected to a drive source such as a motor or the like. 
     Moreover, a number of unillustrated through-holes are formed over the entire surface of this conveying belt  474 . A chamber  476  is disposed between these pair of drive rollers  472 , and a plurality of suction holes for sucking the photosensitive material  16  at negative pressure via the through-holes of the conveying belt  474  are provided on the upper surface of the chamber  476 . 
     As described above, since the chamber  476  sucks the photosensitive material  16  via the through-holes of the conveying belt  474 , it is difficult for the photosensitive material  16  to be deviated form the conveying belt  474  and reliability at the time of conveying the photosensitive material  16  is high. 
     In the above three embodiments, the nozzle row is set as a single row or two rows. However, the nozzle row is not limited to just a single row or a double row. Three or more rows may be employed. By increasing the number of nozzle rows, the driving number of the actuator can be further reduced. 
     Further, in the above three embodiments, the nozzle row is disposed at a right angle to the transfer direction. However, it is not limited to a right angle. The nozzle row may be disposed at an angle with respect to the transfer direction. 
     Still further, in the above embodiments, it is structured such that the photosensitive material  16  and the image receiving material  108  are used for the image recording material and water is applied to the developed photosensitive material  16  by the injecting tank  312  of the application apparatus  310 , so that the photosensitive material  16  and the image receiving material  108  are overlapped and thermally developed and transferred. However, the structure is not limited to this, and water may be injected and applied to the image receiving material  108 . 
     Furthermore, the material is not limited to these, and the other sheet or roll image recording materials may be suitably used. Materials other than water may be used as the image forming solvent. Moreover, the invention may be used in the application of developing fluid a printing paper in a developing machine, in the application of soaking water of a printer, and in coating machines and the like. 
     As mentioned above, the image forming apparatus of the present invention has an excellent effect of uniformly applying the image forming solvent to the image recording material and of improving the image quality of the image on the image recording material. 
     Further, as mentioned above, the fluid injecting apparatus in accordance with the present invention has an excellent effect of uniformly applying the image forming solvent to the image recording material.