Patent Publication Number: US-9897951-B2

Title: Image forming apparatus and control method for the same

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is related to, and claims the priority benefit of, Korean Patent Application No. 10-2015-0079798, filed on Jun. 5, 2015, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference. 
     BACKGROUND 
     1. Field 
     Embodiments of the present disclosure relate to an image forming apparatus having a transporting guide that guides a printing medium between a transferring apparatus and a fusing unit, and a control method thereof. 
     2. Description of the Related Art 
     In general, an image forming apparatus is an apparatus configured that forms images on a printing medium, and includes a printer, a photocopying apparatus, a facsimile, and a multi-function apparatus combined and implemented the functions of the printer, the photocopying apparatus, and the facsimile. 
     The image forming apparatus as such includes a plurality of developing apparatuses to develop an electrostatic latent image into a visible image by use of a developer, a light scanning apparatus that forms an electrostatic latent image on a surface of a photoreceptor by radiating light at the photoreceptor of the developing apparatus, a transferring apparatus to transfer the visible image developed at the photoreceptor to printing medium, and a fusing unit that fuses the photoreceptor on the printing medium. 
     A transporting guide configured to guide the printing medium having the photoreceptor transferred thereto by use of the transferring apparatus to the fusing unit is disposed between the transferring apparatus and the fusing unit. 
     The transporting guide that performs a role to guide a front end of the printing medium transferred from the transferring apparatus to the fusing unit may be entered between a heating roller and a pressing roller of the fusing unit. 
     However, after the front end of the printing medium is entered between the heating roller and the pressing roller of the fusing unit, one side surface of the printing medium facing the transporting guide makes contact with the transporting guide, generating static electricity. 
     SUMMARY 
     Therefore, it is an aspect of at least one exemplary embodiment to provide an image forming apparatus capable of reducing static electricity generated from friction between a printing medium transported toward a transferring roller and a transporting guide guiding the printing medium. 
     It is an aspect of at least one exemplary embodiment to provide an image forming apparatus capable of reducing the contact between a printing medium transported toward a fusing roller and a static removing member. 
     Additional aspects of the disclosure will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the disclosure. 
     In accordance with an aspect of at least one exemplary embodiment, an image forming apparatus includes fusing rollers that fuse a developer at a printing medium, and a transporting guide that guides the printing medium being transported toward the fusing rollers. The transporting guide may be movably installed to move in between a first position provided that guides the printing medium and a second position spaced apart by a certain distance from the first position. 
     A driving device to move the transporting guide may be included. 
     The driving device includes a driving motor, a cam rotated by the driving motor and configured to move the transporting guide in a first direction, and an elastic member to elastically support the transporting guide in a second direction opposite the first direction. 
     The driving device includes a driving axis rotated by use of the driving motor, the cam is provided as a pair of cams, each of the pair of cams installed at a respective side of the driving axis, and the transporting guide may include a pair of supporting portions, each of the pair of supporting portions provided at a respective side of the transporting guide as to correspond to the each of the pair of cams. 
     The driving device includes a driving motor, a pinion rotated by use of the driving motor, and a rack teeth-coupled to the pinion while disposed at the transporting guide. 
     The driving device includes a driving axis rotated by use of the driving motor, the pinion is provided as a pair of pinions, each of the pair of pinions respectively installed at a side of the driving axis, and the rack is provided as a pair of racks, each of the racks of the pair of racks respectively disposed at a side of the transporting guide as to correspond to the respective each of the pair of pinions. 
     The transporting guide is positioned at the first position before the front end of the printing medium has entered in between the pair of fusing rollers, and is moved from the first position to the second position when the front end of the printing medium has entered in between the pair of the fusing rollers. 
     The apparatus includes a static removing member that removes static electricity of the printing medium being transported toward the fusing rollers is. The static removing member moves along with the transporting guide. 
     The static removing member is positioned at the first position before the front end of the printing medium has entered in between the pair of fusing rollers, and is moved from the first position to the second position when the front end of the printing medium has entered in between the pair of the fusing rollers. 
     In accordance with an aspect of at least one exemplary embodiment, an image forming apparatus includes a body, a developing unit that develops an electrostatic latent image to a visible image, a transferring apparatus that transfers the visible image of the developing unit to a printing medium, a fusing unit that fuses the visible image transferred to the printing medium, and a static removing member that removes the static electricity of the printing medium being transported from the transferring apparatus to the fusing unit, and the static removing member while movably installed at an inside the body moves in between a first position and a second position spaced apart from the first position. 
     In accordance with an aspect of at least one exemplary embodiment, an image forming apparatus includes a body, a developing unit that develops an electrostatic latent image to a visible image, a transferring apparatus that transfers the visible image of the developing unit to a printing medium, a fusing unit that fuses the visible image transferred to the printing medium, a transporting guide movably installed at an inside the body that guides the printing medium from the transferring apparatus to the fusing unit, and a driving device that moves the transporting guide. 
     In accordance with an aspect of at least one exemplary embodiment, a control method of an image forming apparatus includes confirming of a position of a printing medium being transported toward a position in between rollers, maintaining of a state of a transporting guide positioned at a first position, upon confirming that the front end of the printing medium has not entered in between the pair of fusing rollers, and moving of the transporting guide from the first position to a second position spaced apart from the first position toward one side of the first direction, upon confirming that the position of the front end of the printing medium is entered in between the fusing rollers. 
     In accordance with at least one exemplary embodiment, upon confirming that the position of a rear end of the printing medium has not passed through the transferring roller, the transporting guide maintains a state of being positioned at the second position, and upon confirming that the position of the rear end of the printing medium has passed through the transferring roller, the transporting guide is moved from the second position to the first position. 
     An image forming apparatus in accordance with at least one exemplary embodiment, including a transporting guide positioned at a first position when guiding a front end of a printing medium, and moved to a second position spaced apart from the first position after the front end of the printing medium has entered in between fusing rollers, reduces friction and reduces subsequent static electricity between the printing medium and the transporting guide. 
     An image forming apparatus in accordance with an embodiment of at least one exemplary embodiment includes a static removing member that removes static electricity formed at a printing medium movably installed thereto, and contact between the static removing member and the printing medium can be reduced 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       These and/or other aspects of the disclosure will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings. 
         FIG. 1  is a schematic view of an image forming apparatus according to at least one exemplary embodiment. 
         FIG. 2  is a perspective view of a transporting guide according to at least one exemplary embodiment. 
         FIG. 3  is an exploded perspective view of the transporting guide and a driving device according at least one exemplary embodiment. 
         FIG. 4  and  FIG. 5  are side views illustrating motions of the transporting guide and the driving device according to the first embodiment of at least one exemplary embodiment. 
         FIG. 6  is an exploded perspective view of a transporting guide and a driving device according to at least one exemplary embodiment. 
         FIG. 7  and  FIG. 8  are side views illustrating motions of the transporting guide and the driving device according to at least one exemplary embodiment. 
     
    
    
     DETAILED DESCRIPTION 
     Reference will now be made in detail to the embodiments of at least one exemplary embodiment, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout. 
     As illustrated on  FIG. 1 , an image forming apparatus in accordance with at least one exemplary embodiment includes a body  10  forming an exterior appearance of the image forming apparatus, a printing medium supplying unit  20  provided, for example, at a lower portion of the body  10  and at which printing mediums P to be used at the image forming apparatus in accordance may be stored, a plurality of developing units  30 C,  30 M,  30 Y, and  30 K to develop an electrostatic latent image to a visible image by use of different colors through a developer, a light scanning unit  40  that forms an electrostatic latent image at photoreceptors  31 C,  31 M,  31 Y, and  30 K of the charged developing units  30 C,  30 M,  30 Y, and  30 K by radiating light, developing units  30 C,  30 M,  30 Y, and  30 K that radiates the visible image formed at the photoreceptors  31 C,  31 M,  31 Y, and  31 K at the printing medium P (see, for example,  FIG. 4 ) delivered from the printing medium supplying unit  20 , and a fusing unit  60  that fuses the developer transferred to printing medium P to the printing medium P. 
     The body  10  may be provided with a loading unit  10   a  at an upper portion thereof. A side of the loading unit  10   a  may be provided with a paper discharging unit  10   b  through which a printing medium P, for example having completed with a formation of an image, may be discharged. An opening  10   c  may be provided at a side, e.g., one side of the body  10  so, for example, repairing or changing components or replacing consumable items at an inside of the body  10  may be performed. A cover  11  may be installed at the a side, e.g., one side of the body  10  to open/close the opening  10   c . A lower end of the cover  11  may be rotatively installed at the body  10  to open/close the opening  10   c  while rotating with respect to the lower end as a center. 
     The printing medium supplying unit  20  includes a printing medium cartridge  21  that may be formed in the shape of a drawer and may be movably installed at the body  10 . A knock-up plate  22  may be disposed at an inside of the printing medium cartridge  21  and at which the printing medium P may be loaded. The printing medium supplying unit  20  at least one exemplary embodiment is vertically provided in two units. 
     The developing units  30 C,  30 M,  30 Y, and  30 K may each include the photoreceptors  31 C,  31 M,  31 Y, and  31 K at which an electrostatic latent image is formed by use of the light scanning unit  40 . Although not illustrated, the developing units  30 C,  30 M,  30 Y, and  30 K may each include a developing roller to supply a developer, and a charging roller to charge the photoreceptors  31 C,  31 M,  31 Y, and  31 K. 
     The developing units  30 C,  30 M,  30 Y, and  30 K according to at least one exemplary embodiment include four units of developing units  30 C,  30 M,  30 Y, and  30 K each provided with the certain one developer having one of the colors such as Cyan C, Magenta M, Yellow Y, and Black K stored at an inside thereof, and the developing units  30 C,  30 M,  30 Y, and  30 K each may develop the one of the colors of Cyan C, Magenta M, Yellow Y, and Black K. The four units of developing units  30 C,  30 M,  30 Y, and  30 K may be evenly disposed at lower sides of the developing units  30 C,  30 M,  30 Y, and  30 K. 
     The light scanning unit  40  may form an electrostatic latent image on the surface of the each of the photoreceptors  31 C,  31 M,  31 Y, and  31 K by radiating the light provided with image information at the photoreceptors  31 C,  31 M,  31 Y, and  31 K provided at the developing units  30 C,  30 M,  30 Y, and  30 K, respectively. 
     As illustrated on  FIGS. 1-2 , the developing units  30 C,  30 M,  30 Y, and  30 K may include a middle transferring belt  51  at which the each developer is developed while overlapped as visible images at the photoreceptors  31 C,  31 M,  31 Y, and  31 K, and a driving roller  52  and a passive roller  53  disposed at inside of the middle transferring belt  51  as to rotate the middle transferring belt  51 . 
     A transferring apparatus  50  includes transferring rollers  54  and  55  to transfer the developer. The transferring rollers  54  and  55  includes first transferring rollers  54  each disposed to respectively face each of the photoreceptors  31 C,  31 M,  31 Y, and  31 K of the developing units  30 C,  30 M,  30 Y, and  30 K in a state that the middle transferring belt  51  is interpositioned therein between as to transfer the visible images of the photoreceptors  31 C,  31 M,  31 Y, and  31 K are transferred to the middle transferring belt  51 . A second transferring roller  55  may be disposed to face the passive roller  53  in a state that the middle transferring belt  51  is interpositioned, for example, in between the second transferring roller  55  and the passive roller  53  as to have the visible images of the middle transferring belt  51  transferred to the printing medium P. 
     The second transferring roller  55  according to an exemplary embodiment may be installed at an inner side of the cover  11 . The cover  11  includes a supporting frame  15  (see, for example,  FIG. 3 ) provided at an inner side of the cover  11  that supports the second transferring roller  55  and a transporting guide  70 . 
     The fusing unit  60  includes a plurality of fusing rollers, e.g., a pair of fusing rollers  61  and  62  to apply heat and pressure at the printing medium P having transferred with the developer. The fusing rollers  61  and  62  include a heating roller  61  to generate heat, and a pressing roller  62  provided with an outer circumferential surface thereof formed with elastically deformable material and to press the printing medium P at the outer circumferential surface of the heating roller  61 , for example. 
     A lower portion of the body  10  includes a pick-up roller  12  disposed at an upper portion of one side of the printing medium supplying unit  20  to pick up the printing mediums P loaded at an inside of the printing medium supplying unit  20 , for example, one-by-one, and a transporting roller  13  that guides the printing medium P picked up by the pick-up roller  12  to the transferring apparatus  50 . 
     An upper portion of the body  10  may include a pair of rollers  14 , to discharge the printing medium P passed through the fusing unit  60  through the paper discharging unit  10   b , disposed at an inner side of the paper discharging unit  10   b.    
     An inside of the body  10  may include the transporting guide  70  disposed in between the second transferring roller  55  and the fusing rollers  61  and  62 . The transporting guide  70  may guide the printing medium P, e.g., the front end of the printing medium toward a position between the fusing rollers  61  and  62  while the printing medium P is provided with the developer transferred thereto while passing through the second transferring roller  55 . 
     As illustrated in  FIG. 2  and  FIG. 3 , the transporting guide  70  may be movably installed at an inside of the body  10 . The inside of the body  10  may be provided with a sensor (not illustrated) that detects a position of the printing medium, e.g., a front end and a rear end of the printing medium P. A driving device  80  may generate a driving force that moves the transporting guide  70 , such that the transporting guide  70  may be moved by driving the driving device  80  according to the position of the printing medium P detected through the sensor. 
     The transporting guide  70  may move between a first position (see, for example,  FIG. 4 ) that guides the front end of the printing medium P and a second position (see, for example,  FIG. 5 ) spaced apart by a certain distance from the first position to reduce contact with respect to the printing medium P. That is, the transporting guide  70  may guide the front end of the printing medium P at the first position. According to an embodiment, in a case when there is no need to guide the front end of the printing medium P, e.g., as the front end of the printing medium P is entered in between the fusing rollers  61  and  62 , the transporting guide  70  may move to the second position, e.g., to reduce the friction between the transporting guide  70  and the printing medium P. 
     According to at least embodiment, the transporting guide  70  includes a guide member  71  that guides the printing medium P while making contact with the printing medium P being transported toward the fusing unit  60 , and a moving member  72  movably installed at an inside of the body  10 . The guide member  71  may be coupled to an upper side of the moving member  72 , and move along the moving member  72 . 
     The guide member  71  may be extended in a vertical direction, and include a plurality of guide ribs  71   a  distantly and parallelly disposed with respect to each other in a horizontal direction, and may guide the printing medium P toward an upper side. 
     According to at least one exemplary embodiment, the moving member  72  includes a coupling portion  72   a  provided with the guide unit  71  coupled to an upper side thereof, a pair of guide units  72   b  provided at sides of the coupling portion  72   a  and movably installed at an inside of the body  10  to guide the moving member  72 , and a pair of supporting portions  72   c  supported at a cam surface of a cam  82  of the driving device  80 . 
     According to at least one exemplary embodiment, the two guide units  72   b  are each provided with a guide hole  72   d  horizontally extended in a moving direction of the transporting guide  70 . The supporting frame  15  includes a fusing unit  15   a  at which the transporting guide is movably fused, and a guide protrusion  15   b  protruded toward an upper side from the fusing unit  15   a  and penetrating through the guide hole  72   d . The two guide protrusion  15   b  may each be provided with a guide bush  73  installed thereto by use of a coupling member S such as a screw, and the moving member  72  may maintain a state of being movably installed through the guide bush  73  at the supporting frame  15 . 
     The supporting portion  72   c  may be formed from one side of the guide unit  72   b  toward the surface extended in a perpendicular direction, and reciprocally interact with respect to the cam  82 . 
     The driving device  80  includes a driving motor  81  that generates a rotational force, the pair of cams  82  their rotate by receiving the rotational force from the driving motor  81 , a driving axis  83  provided with the two cams  82  installed at sides thereof, and a plurality of gears  84  that may be disposed between the driving motor  81  and the driving axis  83 , e.g., to decelerate the speed. The driving device  80  includes a plurality of, e.g., a pair of elastic members  74  configured such that the transporting guide  70  moved by use of the cam  82  may be returned to an original position while supporting the transporting guide  70 . 
     The two cams  82  may each include a cam surface gradually changed while the radius of the outer circumferential surface thereof proceeds toward a radial direction. The cam surfaces of the two cams  82  may each be supported at one surface of the each of the supporting portions  72   c , and the two elastic members  74  may be installed at the supporting frame  15  as to support the opposite surfaces of the supporting portions  72   c.    
     Thus, as illustrated in  FIG. 4 , when the cams  82  are rotated by a certain degree in a single direction so the transporting guide  70  are positioned at a first position, a force may be delivered to the supporting portions  72   c  through the cams  82 , and accordingly, the transporting guide  70  may be moved toward a first direction as the elastic members  74  are elastically deformed. As illustrated in  FIG. 5 , the transporting guide  70  may be moved to a second position. When the cams  82  are again rotated by a certain degree, the force being applied to the supporting portions  72   c  through the cams  82  may be released, and accordingly, the transporting guide  70  may be moved toward a second direction, which is an opposite direction to the first direction, as the elastic members  74  are elastically restored, and as illustrated on  FIG. 5 , the transporting guide  70  is moved again to the first position. 
     The first position of the transporting guide  70  is referred to as a position to transport the front end of the printing medium P toward a position in between the two fusing rollers  61  and  62 , and the second position of the transporting guide  70  may be referred to as a position to reduce the friction in between the transporting guide  70  and the printing medium P. 
     A lower side of the transporting guide  70  may be provided with a static removing member  90  configured to remove static electricity The static removing member  90  may move toward the first position and the second position along with the transporting guide  70 . The static removing member  90  may be formed in the shape of a rectangular plate. A static removing portion  91  having the shape of a saw tooth may be provided at one side end of the static removing member  90  while the static removing portion  91  may be provided to face one side surface of the printing medium P being delivered from the transferring apparatus  50  to the fusing unit  60 . 
     Exemplary motions of the image forming apparatus are described by referring to the drawings. 
     Referring to  FIG. 1 , the charged photoreceptors  31 C,  31 M,  31 Y, and  31 K may be provided with an electrostatic latent image formed thereto by the light radiated from the light scanning unit  40 . The charged photoreceptors  31 C,  31 M,  31 Y, and  31 K having formed with the electrostatic latent image is supplied with the developers by use of the developing roller. Therefore, the electrostatic latent images are developed into a visible image by use of the developers. 
     The visible images developed at the photoreceptors  31 C,  31 M,  31 Y, and  31 K by use of the developers may be overlappingly transferred to the transferring belt  51 , and the visible image formed by being overlappingly transferred is transferred to the printing medium P by use of the second transferring roller  55 . 
     The printing medium P at which the developers are transferred while passing in between the second transferring roller  55  and the transferring belt  51  may be delivered by use of the transporting guide  70  to the position in between of the heating roller  61  and the pressing roller  62  of the fusing unit  60 . The developers transferred to the printing medium P may be fused at the printing medium P by use of the heat and pressure applied by use of the heating roller  61  and the pressing roller  62  of the fusing unit  60 . 
     After passing through the second transferring roller  55 , at least a part of the printing medium, e.g., the front end of the printing medium P is guided to the position in between of the heating roller  61  and the pressing roller  62  by use of the transporting guide  70  positioned at the first position. 
     A confirmation may be made if the front end of the printing medium P is entered into the position in between of the two fusing rollers  61  and  62  of the fusing unit  60 . Prior to the front end of the printing medium P entering into the position in between of the two fusing rollers  61  and  62 , the transporting guide  70 , as illustrated on  FIG. 4 , may be maintained in a state of being positioned at the first position. 
     Upon confirming that the front end of the printing medium P is entered in between of the two fusing rollers  61  and  62  of the fusing unit  60 , power may be authorized at the driving motor  81  and a rotational force may be generated at the driving motor  81 , and the rotational force generated at the driving motor  81  may be delivered to the cams  82  through the driving axis  83  so that the cams  82  may be rotated, for example, by about 180° in a single direction. The portion having a relatively larger radius on the outer circumferential surface of the cam  82  following the rotation of the cam  82  may be supported at one surface of the supporting portion  72   c , and accordingly, the moving member  72  and the guide member  71  installed at the moving member  72  may be moved from the first position to the second position, as illustrated on  FIG. 5 , while the elastic member  74  is deformed. 
     After the transporting guide  70  is moved to the second position, upon confirming that the rear end of the printing medium P is passed through the second transferring roller  55  of the transferring apparatus  50 , the transporting guide  70  may maintain a state of being positioned at the second position, for example, until the rear end of the printing medium P is passed through the second transferring roller  55  of the transferring apparatus  50 . 
     Upon confirming that the rear end of the printing medium P is passed through the second transferring roller  55  of the transferring apparatus  50 , power may be again authorized at the driving motor  81  and a rotational force is generated. The rotational force generated at the driving motor  81  may be delivered to the cams  82  through the driving axis  83  so that the cams  82  are rotated again by about 180° in a single direction. 
     The portion having a relatively smaller radius on the outer circumferential surface of the cam  82  following the rotation of the cam  82  may be supported at one surface of the supporting portion  72   c , and accordingly, as the force applied to the supporting portion  72   c  is released, the moving member  72  and the guide member  71  installed at the moving member  72  may be moved from the second position to the first position, as illustrated on  FIG. 4 , by the use of the elastic restoring force of the elastic member  74 . 
     The static removing member  90  installed at the transporting guide  70  may also be moved along with the transporting guide  70 . That is, the static removing member  90  may be positioned at the first position until the front end of the printing medium P has entered in between the fusing rollers  61  and  62 , and when the front end of the printing medium P has entered in between the fusing rollers  61  and  62 , the static removing member  90  may be moved to the second position. After the rear end of the printing medium P is passed through the second transferring roller  55 , the static removing member  90  may be moved from the second position to the first position again. 
     As the static removing member  90  may move according to the position of the printing medium P, the static removing portion  91  of the static removing member  90  may be prevented from making contact with one side surface of the printing medium P, and accordingly, a decrease in the quality of image that may be generated in a case when the static removing portion  91  makes contact with the printing medium P may be reduced. 
     According to at least one exemplary embodiment, the driving device  80  configured to move the transporting guide  70  includes the cams  82  and the elastic member  74 , but is not limited hereto According to at least one embodiment, as illustrated in  FIG. 6 , a transporting guide  70 ′ may include a pair of pinions  85  having a driving axis  83  provided with the driving device  80  installed at an each side thereof, and a pair of racks  72   e  disposed at each of the both sides of the moving member  72  as to correspond with the pair of pinions  85  and configured to respectively teeth-coupled to the two pinions  85 . 
     As illustrated on  FIG. 7 , the image forming apparatus having the driving device  80  as such is provided such that the transporting guide  70 ′ may be moved, as illustrated in  FIG. 8 , from a first position to a second position, for example, by a rotational force through the racks  72   e  as the driving axis  83  and the pinions  85  coupled to the driving axis  83  are rotated, for example, in a single direction by use of the driving motor  81  in a state that the transporting guide  70 ′ is positioned at the first position, and the transporting guide  70  is returned, as illustrated on  FIG. 7 , from the second position to the first position by being delivered with rotational force through the racks  72   e  as the driving axis  83  and the pinions  85  are rotated in a reverse direction by use of the driving motor  81 . 
     The driving device  80  according to at least one exemplary embodiment of includes a transporting guide  70  that may be moved through the driving motor. The cams  82  and the elastic member  74 , and the driving device  80  according to at least one exemplary embodiment are provided such that the transporting guide  70  may be moved through the driving motor  81 , the pinions  85 , and the racks  72   e , but is not limited hereto, and the transporting guide may be moved through various driving devices such as a solenoid. 
     The static removing member  90  according to at least one exemplary embodiment may be moved along the transporting guide  70  while installed at the transporting guide  70 , but is not limited hereto, and the static removing member  90  may be moved independently as the static removing member  90  may be separately structured from the transporting guide  70 . 
     The guide member  71  and the moving member  72  in the above embodiments are separately manufactured and then coupled to each other, but are not limited hereto, and the guide member  71  and the moving member  72  may be provided to be manufactured as a single member. 
     According to at least one exemplary embodiment, the image forming apparatus includes a separate driving device configured to move the transporting guide  70 , but is not limited hereto, and the image forming apparatus may be delivered with driving force from another structure of the image forming apparatus, such as a driving device configured to drive a structure, for example, a developing unit, a transferring unit, or a fusing unit, so that the transporting guide may be moved. 
     The transferring apparatus in the present embodiment includes the middle transferring belt, the first transferring roller, and the second transferring roller, but is not limited hereto, and the movable transporting guide of at least one exemplary embodiment may be applied as it is to an image forming apparatus having a single transferring roller provided with the transferring apparatus installed while facing a photoreceptor without the structures corresponding to the middle transferring belt and the first transferring roller. 
     Although a few embodiments of at least one exemplary embodiment have been illustrated and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the disclosure, the scope of which is defined in the claims and their equivalents.