Abstract: A drum unit is removably mountable to a supporting unit of an image forming apparatus. The drum unit includes a pair of side plates; and a plurality of photosensitive drums. The pair of side plates face each other and are apart from each other in a first direction. The plurality of photosensitive drums are supported by the pair of side plates such that an axial direction of each photosensitive drum is parallel to the first direction and such that each photosensitive drum is movable relative to the pair of side plates. Each side plate has a plurality of urging members and a plurality of stoppers such that one of the urging members corresponds to one of the photosensitive drums and to one of the stoppers. Each urging member is configured to urge a corresponding photosensitive drum toward a corresponding stopper.

Abstract: An image forming apparatus includes a main casing, a plurality of photosensitive drums, a retaining unit, and an endless belt. The retaining unit retains the plurality of photosensitive drums, and is movable between an internal position within the main casing and an external position outside of the main casing. The endless belt is configured to contact the plurality of the photosensitive drums, when the retaining unit is in the internal position and retains the plurality of the photosensitive drums therein. The retaining unit includes a plurality of pressing portions configured to exert pressure on the plurality of photosensitive drums toward the endless belt, when the retaining unit is in the internal position and retains the plurality of the photosensitive drums therein.

Abstract: A powder supply device to supply powder to a supply destination includes a body, a single holder including multiple mounts on which multiple powder containers are removably mounted respectively, and a reservoir disposed in the body and below the single holder to store powder discharged from the multiple powder containers; and the single holder is removably attachable to the body of the powder supply device including the reservoir.

Abstract: An image forming apparatus includes an opening/closing member, an opening/closing detecting device and an operating member. The opening/closing member turns integrally with a supporting shaft around the supporting shaft. The opening/closing detecting device detects an opening/closing state of the opening/closing member. The operating member turns integrally with the supporting shaft so as to interlock with turning of the opening/closing member. The operating member includes a pressing part having an external circumference face around the supporting shaft and a relief part having an external circumference face inside a rotation locus of the pressing part.

Abstract: An image forming apparatus includes a driving source, a supply roller which supplies a recording sheet, a fixing device, a fixing driving gear mechanism which transmits a driving force of the driving source to the fixing device, a supply driving gear mechanism which transmits the driving force to the supply roller, and a control device. The control device controls the driving source to rotate in one direction when a temperature of the fixing device exceeds a predetermined temperature, and to rotate in a reverse direction when the temperature is the predetermined temperature or lower. The fixing driving gear mechanism includes a mechanism which interrupts a transmission of the driving force when rotating in the reverse direction. The supply driving gear mechanism includes a mechanism which causes a rotating direction of the supply roller to be the same when the driving source rotates in both directions.

Abstract: A replaceable unit for an electrophotographic image forming device includes a housing having a photoconductive drum rotatably mounted thereon. The photoconductive drum has a rotational axis. A guide channel on an exterior of the housing extends parallel to the rotational axis of the photoconductive drum and is positioned to guide insertion of the housing into the image forming device. A positioning stop on the housing is movable between a latching position and an unlatching position. In the latching position the positioning stop obstructs at least a portion of the guide channel to limit the travel of the replaceable unit in the image forming device parallel to the rotational axis of the photoconductive drum. A release handle on the housing is operatively connected to the positioning stop to move the positioning stop from the latching position of the positioning stop to the unlatching position of the positioning stop.

Abstract: An image forming apparatus includes plural image holding bodies, plural image writing devices, a movement member, and a retractor. The image holding bodies are arranged in a predetermined direction. The image writing devices face and write images onto the respective image holding bodies. The movement member holds the image holding bodies, is able to be drawn through an opening in a cover of a housing of the image forming apparatus, and is moved in an image holding body arrangement direction. The retractor retracts the image writing devices when the movement member is drawn through the opening. The retractor includes first and second retracting mechanisms. The first retracting mechanism retracts the image writing devices to respective first retracted positions. The second retracting mechanism retracts the image writing devices to respective second retracted positions after the first retracting mechanism has retracted the image writing devices.

Abstract: An image forming apparatus includes a main casing, an opening-closing member configured to open and close an opening on a side of the main casing and to move between an open position and a closed position, a belt unit configured to move between a first position and a second position, a drum unit configured to move between a third position and a fourth position, a developing device unit configured to move in an arrangement direction of developing rollers, and an interlock mechanism configured such that in response to a movement of the opening-closing member from the closed position to the open position, the belt unit moves from the first position to the second position and the drum unit moves from the third position to the fourth position.

Abstract: Provided is a sheet transport device including a device main body on which one of a first transport roller pair that transports sheets is provided, an opening and closing door that is movably and rotatably supported between a closing position where a part of a sheet transport path formed on a side surface of the device main body is covered and an opening position where a part of the sheet transport path is open, and on which one of a second transport roller pair provided on the sheet transport path is provided, and a transport unit that includes another one of the first transport roller pair and another one of the second transport roller pair, and is swingably supported by the opening and closing door.

Abstract: The developer container includes a rotator that is rotated in the container body, a sequence of gears disposed outside the developer container that transmits a torque to the rotator, and a container guiding portion that fits with a main body side guiding portion and guides the developer container in a direction in which the developer container is attached to a mounting portion of an image forming device main body. A first gear included in the sequence of the gears is movable between an operating position where the first gear engages with a second gear and a retracted position where the first gear is retracted. On a surface on which the container guiding portion is disposed, a part of the container guiding portion is disposed within a projected area of the first gear being disposed at the operating position.

Abstract: In one embodiment, an image forming apparatus has an image carrier, a transfer unit, and a spacer. The spacer is detachably attached between the image carrier and the transfer unit. When having been attached to the transfer unit, the spacer makes the image carrier and the transfer unit to be separated.

Abstract: A cartridge detachably mountable to a main assembly of an image forming apparatus, includes: a member to be supplied with electric energy; a frame molded with a resin material; and an electrode member formed on the frame by injection molding of an electroconductive resin material. The electrode member includes a supporting portion for supporting the member to be supplied with electric energy and a contact portion to be contacted to a main assembly electric contact, provided in the main assembly, when the cartridge is mounted to the main assembly.

Abstract: An image forming apparatus include a door through which a tray carrying a cartridge passes. In a door closing operation, (i) movement of the tray from a movable position to an image forming position, (ii) movement of a drive transmission member, for transmitting a driving force to the cartridge from a main assembly, from a first spacing position to a drive-connecting position, (iii) movement of an urging member for urging the cartridge to the main assembly from a second spacing position to a contact position, and (iv) movement of an electric energy supply member, for supplying electric power to the cartridge from the main assembly, from a third spacing position to an electric energy supplying position, are carried out in the order named.

Abstract: An image forming apparatus (1) includes, as working sections, a paper output tray (16), a paper feeding cassette (13), and attachment sections to which toner cartridges (71) through (74), a waste toner container (69), and a unit assembly (11) are attached. Out of the working sections, a high-frequency working section with a high working frequency is provided on a front surface of the image forming apparatus, and a low-frequency working section with a low working frequency is provided on a side surface of the image forming apparatus.

Abstract: An image forming apparatus has a housing. Inside the housing, there are provided an image carrying member, a developing unit, a driving force transmission unit, a contact/separation mechanism, a transmission enable/disable mechanism, a cover movably supported by the housing, and a single link member configured to move in association with an opening/closing movement of the cover. When the link member moves in association with the opening movement of the cover, the contact/separation mechanism moves the developing unit to a detachable position, and the transmission enable/disable mechanism moves the driving force transmission unit to the transmission cutoff position.

Abstract: An image forming apparatus includes: a cover that is openable and closable. The cover is provided with a lock member, a first biasing portion, a lever member, and a second biasing portion. The lock member is movable between a locking position and an unlocking position. The first biasing portion biases the lock member toward the unlocking position. The lever member is provided to be in contact with the lock member, the lever member being movable between a retaining position for retaining the lock member at the locking position and a retention releasing position for releasing retention of the lock member in a direction intersecting with a moving direction of the lock member. The second biasing portion biases the lever member toward the retaining position.

Abstract: An image forming apparatus is provided that includes a first casing disposed on a first side in a first direction, and a second casing disposed on a second side in the first direction, the second casing containing an image reading unit, a driver driving the image reading unit, and a driver compartment configured to accommodate the driver and disposed at an end portion of the second casing on a third side in a second direction perpendicular to the first direction, the first casing containing an image forming unit, a control board electrically connected with the driver and the image reading unit and configured to control the image reading unit, and a board compartment configured to accommodate at least a part of the control board and disposed at an end portion of the first casing on a fourth side opposite to the third side in the second direction.

Abstract: A fixing device includes a fixing belt, a pressuring member, a pressing member, a guiding member, a cap member, an elastic member and a detecting mechanism. The pressing member includes a pressing face pressing the fixing belt to a side of the pressuring member. The fixing belt includes a bulging part arranged at the downstream side from a fixing nip in a conveying direction. The cap member includes a facing part facing to the bulging part. Before the pressuring member comes into pressure contact with the fixing belt, a gap is arranged between the bulging part and facing part. When the pressuring member comes into pressure contact with the fixing belt, the bulging part bulges toward an external diameter side of the fixing belt to fill up the gap and the cap member is held by an end part of the fixing belt via the elastic member.

Abstract: An image forming apparatus, including an image forming unit, a first frame, and a first beam, is provided. The image forming unit includes a photosensitive drum. The first frame is made of resin and is arranged on one end, along an axial direction of a rotation axis of the photosensitive drum, of the image forming unit. The first beam is formed in an elongated shape. The first beam is arranged along a planar face of the first frame. The first beam is fixed to the first frame by a fixing member at a first portion, which is in a position closer to a first longitudinal end of the first beam, and is loose from the first frame to be movable at least along the axial direction at a loose part, which is in a position closer to a second longitudinal end of the first beam than the first portion.

Abstract: A frame structure for use in an image forming apparatus includes a main frame, a front plate to position a first end of a latent image carrier within the image forming apparatus, a rear plate fixed to the main frame to position a second end of the latent image carrier opposite the first end within the image forming apparatus, and a writing device frame fixed to the rear plate to position a latent image writing unit that writes a latent image onto the latent image carrier within the image forming apparatus. The front plate is fixed to the writing device frame. The rear plate is fixed to the main frame at least at three separate positions, at least one position being offset from a hypothetical line connecting the other two positions.

Abstract: An image forming unit includes a cartridge and a unit frame. The cartridge has a cartridge-grip. The unit frame is configured to accommodate the cartridge. The unit frame includes a first plate, a second plate, a first beam, and a second beam. The first plate has a through hole. The first beam extends between the first plate and the second plate. The first beam includes a frame-grip disposed between an upper end of the first beam and a lower end of the first beam. The second beam extends between the first plate and the second plate. When the cartridge is accommodated in the unit frame, a distance between the lower end of the first beam and an upper end of the frame-grip is smaller than a distance between the lower end of the first beam and an upper end of the cartridge-grip.

Abstract: A buffer structure is configured to an office machine including a base and a cover pivotally connected to the base provided. The buffer structure includes a first engaging portion fixed to the cover, a rotation member and an elastic member. The rotation member includes a rotation shaft pivotally connected to the base, a second engaging portion located on a rotation path of the first engaging portion, and a fixing portion. The elastic member includes a first end and a second end opposite to each other. The first end and the second end are fixed to the base and the fixing portion. When the cover rotates toward the base, the first engaging portion is engaged to the second engaging portion to drive the rotation member to rotate along a first clock direction, and the elastic member is deformed to exert a moment to the rotation member along a second clock direction.

Abstract: An image forming apparatus includes an apparatus body composing the image forming apparatus, a unit drawably stored in the apparatus body, a lock mechanism provided in the unit and configured to lock the unit in a state in which the unit is stored in the apparatus body, a display portion provided on an upper surface part of the apparatus body, and an unlock mechanism configured to unlock the lock mechanism. The unlock mechanism includes an operating portion provided in a region facing the display portion of the upper surface part of the unit and operated in unlocking the lock mechanism.

Abstract: An image forming apparatus including a plurality of image forming units arranged in parallel with each other at intervals in a predetermined direction toward a first side from a second side of the image forming apparatus, each image forming unit including a photoconductive drum, and a charger configured to charge the photoconductive drum, a frame body configured to support the plurality of image forming units, and a regulating member disposed between a first-side image forming unit of the plurality of image forming units that is closest to the first side in the predetermined direction and a first-side end portion of the frame body in the predetermined direction, the regulating member configured to regulate an air current and urge the first-side image forming unit.

Abstract: An image forming apparatus includes a main body, endless belt, photosensitive drums, setting unit, contacting/separating mechanism, transmitting mechanism, and coupling members. The photosensitive drums are disposed in confrontation with the endless belt and are arranged in a first direction. Each photosensitive drum has an axis extending in a second direction perpendicular to the first direction. The setting unit sets the image forming apparatus to a monochrome mode or color mode. The contacting/separating mechanism controls at least one photosensitive drum to contact or separate from the endless in accordance with the set mode. The transmitting mechanism selectively transmits drive power to photosensitive drums. Each coupling member is selectively coupled to the corresponding photosensitive drum and has a coupling axis extending in the second direction.

Abstract: An image forming apparatus, including: a plurality of image forming units arranged to align along a direction orthogonal to rotation axes of photosensitive drums; a first frame made of resin and arranged on one side of the photosensitive drums along the direction of rotation axes to support the plurality of image forming units; a first beam made of metal, formed in an elongated shape longitudinally along a direction to intersect with the aligning direction, and arranged along and fixed to a planar face of the first frame; and a second beam formed in an elongated shape extending along the aligning direction, arranged along the planar face of the first frame to intersect with the first beam, and fixed to the planar face of the first frame, is provided. Rigidity of the first beam is higher than rigidity of the second beam.

Abstract: An image forming apparatus, including an image forming unit with a photosensitive drum and a developer device; a first frame made of a resin, formed in a shape of a plate, arranged on one end, along an axial direction of the rotation axis of the photosensitive drum, of the image forming unit; and a first beam formed in an elongated shape, arranged along and fixed to a planar face of the first frame, is provided. The first beam is made of a material different from the first frame and includes a first attachment portion, at which the first beam is immovably fixed to the first frame, and a second attachment portion, at which the first beam is attached to the first frame movably with respect to the first frame along a longitudinal direction of the first beam.

Abstract: An image forming apparatus includes: an image carrier unit that includes an image carrier and is configured to be capable of being housed in and removed from an image-forming-apparatus main body; an exposure device that is arranged close to the image carrier to form an electrostatic latent image; a retracting mechanism that holds the exposure device close to the image carrier when the image carrier unit is housed in the image-forming-apparatus main body, and holds the exposure device away from the image carrier when the image carrier unit is being removed from the image-forming-apparatus main body; a covering member that covers the retracting mechanism in a state where backlash of the exposure device at least in a main-scanning direction is allowed; and a guide mechanism that positions the exposure device in the main-scanning direction when the exposure device comes closer to the image carrier through the retracting mechanism.

Abstract: Image forming apparatuses include: a casing; an image forming unit removable from the casing in a first direction; and plural developer cartridges. The cartridges may be attached and detached with respect to the image forming unit in a second direction that is inclined toward the first direction. Other image forming apparatuses include: a casing; an exposure device; a plurality of cartridges configured to be attached and detached with respect to the casing in a first direction; and a recording medium transport system for transporting recording media adjacent the photosensitive members in a second direction. The first direction may be inclined with respect to the second direction, and at least a portion of optical paths of the light emitted from the exposure device may extend parallel with the first direction. Aspects also relate to image forming units, e.g., for use in image forming apparatuses as described above.

Abstract: A recording apparatus including: recording modules each having a first conveyance path; a first common tray having a support surface; and a second conveyance path connecting each first conveyance path and the first common tray, wherein the recording modules are disposed such that the first conveyance paths are parallel to and are spaced apart from each other in a direction orthogonal to the first conveyance paths, and wherein an angle formed by any continuous two path portions in the second conveyance path, an angle formed by the second conveyance path and the support surface of the first common tray, and an angle formed by the second conveyance path and each first conveyance path are made larger than 90° and are not larger than 180°, such that a maximum bending angle of a recording medium that is conveyed between the first common tray and each recording module is less than 90°.

Abstract: An image forming device includes: a main casing; a retaining unit; a feed tray; and a pickup roller. The retaining unit retains a plurality of photosensitive drums juxtaposedly arrayed and spaced away from each other in an array direction. The retaining unit is movable in the array direction between a mounted position in which the retaining unit is mounted in the main casing and a pulled-out position in which the retaining unit is pulled out of the main casing. The feed tray is configured to accommodate a first transferred medium. The pickup roller is configured to pick up the first transferred medium accommodated in the feed tray. The pickup roller is arranged to overlap with the retaining unit in the array direction.

Abstract: A recording apparatus includes: first and second recording modules; a storage accommodating a recording medium; a first path extending from the storage to the first recording module; a second path extending from the storage to the second recording module and including a first shared portion shared with the first path; a first roller pair disposed downstream of a first branch position on the first path; and a movement causing member for moving two rollers of the first roller pair to a contact position or a separated position. A controller is configured to: determine whether a leading edge of the recording medium has reached an individual conveyor of the first recording module; when the leading edge has reached the individual conveyor, move the two rollers to the separated position; and supply a recording medium from the storage to the second recording module.

Abstract: An image forming apparatus including an apparatus main body including an inner wall that defines an accommodation portion, photoconductive drums arranged in parallel at intervals in a predetermined direction toward a first side from a second side, in the accommodation portion, chargers disposed corresponding to the photoconductive drums, respectively, each charger charging a corresponding one of the photoconductive drums, a frame body configured to support the photoconductive drums and the chargers and be accommodated in the accommodation portion, a regulating member disposed between the inner wall and a first-side end portion of the frame body in the predetermined direction, the regulating member configured to apply an urging force to the frame body and regulate an air current, and a pressing member configured to press the frame body against the urging force of the regulating member and regulate a movement of the frame body relative to the apparatus main body.

Abstract: A recording apparatus including recording modules each having a recording medium conveyance path, the modules being identical in external shape and disposed such that conveyor surfaces thereof are parallel to each other and such that same-shaped portions thereof align with each other in a first direction intersecting the conveyor surface, wherein, in a certain cross section orthogonal to the conveyor surface and parallel to the first direction, where a dimension of each module in a second direction orthogonal to a conveyor surface is L1 and a dimension thereof in a third direction orthogonal to the second direction is L2, a dimension L3, in the second direction, of adjacent two of the modules in the first direction is smaller than twice the dimension L1 and a dimension L4, in the third direction, of the adjacent two modules is smaller than twice the dimension L2 and is larger than the dimension L2.

Abstract: An image forming apparatus includes, an upper cabinet disposed openably and closably on a main cabinet, reader cover disposed openably and closably on the upper cabinet and covering the image reader when the reader cover is closed and restriction mechanism preventing the reader cover from opening relative to the upper cabinet when the upper cabinet is open relative to the main cabinet. The restriction mechanism includes a first engagement member disposed at the upper cabinet and a second engagement member disposed at the reader cover and engageable with the first engagement member. The reader cover is prevented from opening relative to the upper cabinet when the first engagement member engages with the second engagement member. The second engagement member is urged to project from the reader cover towards the upper cabinet and movable from the upper cabinet to the reader cover.

Abstract: A drivable projection for a toner cartridge drum gear includes an axially extending support portion having a plurality of axially extending edges and an end face. A plurality of substantially spherical engagement portions are supported by the support portion, and each engagement portion defines a center that may be substantially aligned with the end face and/or substantially aligned with a respective one of the plurality of axially extending edges. The engagement portions are configured to receive driving rotatable force from the drive mechanism of a printer.

Abstract: An image forming apparatus includes a frame, a photosensitive drum, an endless belt disposed above the photosensitive drum, and a pressing member. The photosensitive drum includes a drum body and a flange portion that is provided on one end portion of the drum body. The flange portion has a contacted portion and a pressed portion. The pressing member presses the pressed portion upward to permit the photosensitive drum to be in contact with the endless belt. The frame has a positioning portion disposed above the pressing member and above the photosensitive drum. The positioning portion is configured to be in contact with the contacted portion and to position the photosensitive drum when the pressing member presses the pressed portion. The pressed portion is disposed farther from the drum body in an axial direction of the photosensitive drum than the contacted portion.

Abstract: An image forming apparatus includes a device main body, a detachable unit that is detachable and attachable to the device main body, a sheet guide that guides a pathway of sheet, and a guide position part that regulates a position of the sheet guide. The guide position part is disposed in the device main body, the sheet guide is disposed movably with respect to the detachable unit, and when the detachable unit is mounted on the device main body, a position of the sheet guide is regulated by abutting the guide position part.

Abstract: An image forming apparatus includes a main body, a photosensitive drum detachably attached to the main body, a light exposure member configured to expose the photosensitive member to light, a developer container configured to store a developer to be supplied to the photosensitive drum, and a supporting member disposed in the main body and configured to support the light exposure member and to hold the developer container detachably. The supporting member is configured to, while holding the developer container, move between a light exposure position where the light exposure member is located proximate to the photosensitive drum and a separation position where the light exposure member is separated from the photosensitive drum while the supporting member holds the developer container.

Abstract: An electrophotographic image forming apparatus (100) including: a cartridge tray (5) movable between an inside position (IP) and an outside position (OP) of a main body of the apparatus with supporting a cartridge (8); a light emitting member (9) having a plurality of light emitting elements for emitting light to expose a photosensitive member in accordance with image information; a support (7) that supports the light emitting member so that the light emitting member assumes between an exposure position (LP) at which the photosensitive member is exposed with the light emitting element and a retracted position (RP) retracted from the exposure position; and an interlocking device (130, 170) that moves the support between the exposure position and the retracted position in association with movement of the tray toward the outside and inside positions.

Abstract: A process cartridge includes an image holding body assembly that includes an image holding body, a developing assembly that includes a developer holding body, an urging member, a contacting and separating mechanism, and a gap forming mechanism. The image holding body assembly is inserted into and pulled from an assembly receiving portion. The urging member urges the developing assembly so that the developer holding body is pressed against the image holding body. The contacting and separating mechanism is disposed on the front side and operated to separate the image holding body assembly and the developing assembly from each other against an urging force. The gap forming mechanism forms a gap between the image holding body and the developer holding body on the rear side against the urging force. The size of the gap is larger than that existing before the image holding body assembly is pulled.

Abstract: In an image forming apparatus, each of a plurality of image forming units includes a receiving member formed with a reception opening configured to receive developer. Each of a plurality of developer cartridges includes a supply member formed with a supply opening through which developer is configured to be supplied to a corresponding one of the plurality of image forming units. A cartridge supporting member is mounted in a main casing and configured to move between a first position and a second position. The supply opening and the reception opening are in communication with each other when the cartridge supporting member is in the first position and the cartridge supporting member is pulled outside the main casing when the cartridge supporting member is in the second position. One of the receiving member and the supply member protrudes toward remaining one, and the remaining one is configured to receive the one.

Abstract: An image forming apparatus includes an apparatus body, an apparatus-side terminal provided to a first inner side wall of the apparatus body, a developer container to contain developer and to be removably installable in the apparatus body, a container-side terminal electrically connectable to the apparatus-side terminal and disposed in a first end portion of the developer container in a longitudinal direction thereof, and an apparatus-side protrusion projecting inward from the first inner side wall of the apparatus body. In removal of the developer container from the apparatus body, a second end portion of the developer container in the longitudinal direction is disengaged from the apparatus body before the first end portion is disengaged from the apparatus body, and the apparatus-side protrusion contacts the first end portion of the developer container immediately after removal of the developer container from the apparatus body is started.

Abstract: An image-forming device includes: a main body; a plurality of developer cartridges; a holder; and a plurality of urging members. The main body has a plurality of engaging parts. Each developer cartridge has a photosensitive drum. The holder is configured to move between a position inside the main body and a position outside the main body and to hold the developer cartridges such that the developer cartridges are arranged in a row along a first direction. Each urging member is configured to urge a corresponding developer cartridge toward a corresponding engaging part when the holder holding the developer cartridges is at the position inside the main body.

Abstract: An image forming apparatus for forming an image on a recording material includes a detachably mountable cartridge and a pressing member movable between a pressing position for applying a pressing force to the cartridge to fix the cartridge to an image forming position and a non-pressing position. In addition, a limiting member moves between a limiting position and a non-limiting position. In the limiting position, the limiting member is close to the cartridge placed in the image forming position, with a gap therebetween to limit movement of the cartridge if the cartridge moves against the pressing force of the pressing member. The limiting member permits the cartridge to move from the image forming position to a retracted position, by moving from the limiting position to the non-limiting position.

Abstract: A liquid ejection device includes a first rolled medium accommodation unit, a second rolled medium accommodation unit and a liquid ejection head. The first rolled medium accommodation unit is configured to accommodate a rolled medium. The second rolled medium accommodation unit is configured to accommodate the rolled medium, the second rolled medium accommodation unit being movable. The liquid ejection head is configured to eject an ink as a liquid onto a medium supplied by unwound from the rolled medium accommodated in one of the first rolled medium accommodation unit and the second rolled medium accommodation unit.

Abstract: An image forming apparatus includes a main frame and a holder. The holder holds a plurality of photosensitive drums arrayed in a predetermined direction. The holder includes a pair of side plates each positioned at each axial end portion of each photosensitive drum, and each having an upstream end portion in the accommodating direction, and a pair of protruding portions each protruding outward in the axial direction from the upstream end portion of each side plate. The main frame includes a pair of positioning portions and a pair of support portions. The pair of positioning portions is configured to be in contact with each protruding portion from below and on a downstream side of the protruding portion in the accommodating direction. The pair of support portions is positioned downstream of the pair of positioning portions in the accommodating direction and configured to support the pair of side plates.

Abstract: An image forming device includes a main casing, a plurality of photosensitive accommodated in the main casing, a plurality of developer cartridges detachably mountable in the main casing, an endless belt, a plurality of first cleaning units and first conveying units provided for the respective photosensitive drums, a second cleaning unit for cleaning the endless belt, a second conveying unit, and a third conveying unit. The photosensitive drums include a first photosensitive drum and the developer cartridges include a first developer cartridge corresponding to the first photosensitive drum. The third conveying unit conveys waste developer cleaned by the first cleaning unit and conveyed by the first conveying unit corresponding to the first photosensitive drum and waste developer cleaned by the second cleaning unit and conveyed by the second conveying unit toward a first waste developer accommodating chamber of the first developer cartridge.

Abstract: To facilitate replacing photosensitive drums and/or developing devices in an image forming apparatus, a photosensitive member unit including a plurality of photosensitive members is loaded in a main casing. A developing device unit including a plurality of developing devices is also loaded in the main casing. Both an intermediate transfer belt and the photosensitive member unit are configured to be movable toward and away from the developing device unit. Further, when the photosensitive member unit is separated from the developing device unit, the intermediate transfer belt and the plurality of photosensitive members are also separated from each other.

Abstract: A driving force transmission mechanism includes a connection for integrally rotating a driving shaft on the driving source side and a driven shaft of a rotary member. The connection includes a tubular boss portion; and a fitting shaft portion fitted into the tubular boss portion. An inner shaft portion is provided in a projecting manner from bottom center of the tubular boss portion toward inside the tubular boss portion. An inner recessed portion into which the inner shaft portion fits is provided in center of a leading edge plane for fitting of the fitting shaft portion. Micro gaps are provided between an inner surface of the tubular boss portion and an outer surface of the fitting shaft portion and between an inner surface of the inner recessed portion and an outer surface of the inner shaft portion.