Abstract: An image forming apparatus includes a holder, photosensitive drums, developing units, and toner cartridges. Each toner cartridge includes a case, shutter, and operation member. The case contains the toner therein and has an opening at a position confronting the corresponding developing unit in a state that the toner cartridge is attached to the holder. The shutter is movable between a block position and an open position. The shutter is located at the open position when the operation member is located at a first position. The shutter is located at the block position when the operation member is located at a second position. The operation member has: a base end fixed to the shutter; and a distal end configured to move from a lower position to a position higher than the lower position when the operation member is moved from the first position to the second position.

Abstract: An image forming device includes: a main casing; a retaining member; a plurality of developing units; a plurality of toner cartridges; and an operation unit. The retaining member is configured to be movable in a first direction between an accommodated position and a pulled-out position. The retaining member includes a first side plate and a second side plate extending in the first direction and disposed in confrontation with and spaced apart from each other in a second direction orthogonal to the first direction. The developing units are retained in the retaining member. The toner cartridges have one-on-one correspondence to the developing units and are configured to be mountable in or detachable from the retaining member when the retaining member is located at the pulled-out position.

Abstract: A multi-function printer includes an image forming unit and a scanner unit. The image forming unit includes a body casing, a developing unit having a developing roller extending in a lateral direction, a developer cartridge provided on one side of the axis of the developing roller and detachably attached to the body casing, a discharge tray, a side cover, a support unit for supporting the developer cartridge such that the developer cartridge is detachably attached to a front side of the body casing, a sheet feeding tray detachably attachable to the front side of the body casing, and a discharge unit provided on the front side of the body casing and discharging sheet on which an image is formed to the rear side of the body casing. The scanner unit is provided above the image forming unit having a predetermined space opened on the one side therebetween.

Abstract: A cartridge includes: a housing that has a first wall part and a second wall part arranged at an interval from the first wall part and is configured to accommodate developer; a developer carrier that is rotatably supported to the housing and carries the developer; a layer thickness regulation member that is supported to the housing so that it is arranged at an opposite side to the second wall part with respect to the first wall part and that is configured to regulate a layer thickness of the developer carried on a surface of the developer carrier, and a covering member that is arranged at an opposite side to the second wall part with respect to the layer thickness regulation member and covers the layer thickness regulation member, wherein the covering member has a grip to grip the housing.

Abstract: An image-forming device includes: a main casing; a retaining member; developing units retained by the retaining member; toner cartridges; and an operating member provided at the retaining member. The retaining member is movably disposed between a position inside an accommodation space in the main casing, and a pull-out position. The toner cartridges are detachably attachable to the retaining member, when the retaining member is at the pull-out position. Each toner cartridge includes: a casing in which a through-hole is formed for supplying toner to a corresponding developing unit; and a shutter that moves between open and closed positions exposing and closing the through-hole, respectively. The operating member moves the shutter between the open and closed positions by shifting between first and second positions in which the operating member extends above the retaining member, and in which the operating member has a lower profile than in the first position, respectively.

Abstract: An image forming apparatus includes a holder, photosensitive drums, developing units, and toner cartridges. Each toner cartridge includes a case, shutter, and operation member. The case contains the toner therein and has an opening at a position confronting the corresponding developing unit in a state that the toner cartridge is attached to the holder. The shutter is movable between a block position and an open position. The shutter is located at the open position when the operation member is located at a first position. The shutter is located at the block position when the operation member is located at a second position. The operation member has: a base end fixed to the shutter; and a distal end configured to move from a lower position to a position higher than the lower position when the operation member is moved from the first position to the second position.

Abstract: A holder unit is movable between an accommodated position and a pulled out position. A plurality of toner cartridges is detachably attached to the holder unit. A shutter provided on each toner cartridge is movable between a block position where the shutter blocks an opening of a case and an open position where the shutter opens the opening. An operation member of each toner cartridge operates the shutter such that the shutter moves between a first position and a second position. The shutter is located at the open position when the operation member is located at the first position. The shutter is located at the block position when the operation member is located at the second position. An interference member is configured such that the operation members abut the interference member to be displaced from the second position to the first position when the holder unit is moved from the pulled out position to the accommodated position.

Abstract: A developing device is capable of preventing developing agent from leaking from a developing frame of a developer cartridge. The developer cartridge includes a developing agent carrying member, a layer thickness regulator, and a first seal positioned between the developing agent carrying member and the layer thickness regulator. The regulator includes a plate member provided with a projecting portion. The projecting portion has a laterally outer end portion positioned inward of laterally outer end portion of the first seal.

Abstract: A developing device is capable of preventing developing agent from leaking from a developing frame of a developer cartridge. The developer cartridge includes a developing agent carrying member including a rubber roller, a first seal including a first fluffing member, and a second seal including a second base member and a second fluffing member fixed thereto. The second base member and the second fluffing member have downstream end portions in a rotational direction of the developing agent carrying member. The downstream end portion of the second base member is positioned upstream of the downstream end portion of the second fluffing member. The downstream end portion of the second fluffing member is nipped between the first fluffing member and the rubber roller.

Abstract: A developer cartridge includes a casing, a developing roller, a blade, a first blade pressing member and a second blade pressing member. The casing is configured to store developer therein. The developing roller is rotatably supported by the casing. The blade has a first end portion and a second end portion opposite to the first end portion. The first end portion is supported by the casing. The blade is configured to regulate the developer carried on a peripheral surface of the developing roller to a predetermined thickness at the second end portion. The first blade pressing member is configured to press the first end portion of the blade. The second blade pressing member is configured to be attached to and removed from the casing. The second blade pressing member includes a pressing portion configured to press the second end portion of the blade toward the developing roller.

Abstract: A developing device includes: a first frame; a second frame; a developer-carrying member; and a thickness-regulating member. The first frame includes: a pair of first walls opposed with each other; and a second wall connecting the pair of first walls and having a first fixing part. The second frame includes a third wall opposed to the second wall and attached to the pair of first walls when assembled to the first frame. The developer-carrying member has an axis extending in a first direction, is configured to rotate about the axis, and is disposed between the pair of first walls. The thickness-regulating member is fixed to the first fixing part and is configured to regulate a thickness of developer carried on the developer-carrying member. The third wall is disposed between the second wall and the thickness-regulating member.

Abstract: A process cartridge including: a photosensitive member cartridge including a photosensitive member; and a developing cartridge including a developer carrier. The developing cartridge further includes: an inputting portion; a first cover; and a second cover. The first cover has a first engagement portion configured to move the developer carrier away from the photosensitive member. The first engagement portion is positioned between an axis of the developer carrier extending in an axial direction and an axis of the inputting portion extending in the axial direction, when projected in the axial direction. The second cover has a second engagement portion configured to move the developer carrier away from the photosensitive member. The second engagement portion is positioned between the axis of the developer carrier and the axis of the inputting portion, when projected in the axial direction.

Abstract: Each of the toner cartridges includes a case, a shutter, a first operation portion and a second operation portion. The shutter is located at an open position where the shutter opens an opening of a case when the first operation portion is located at a first position. The shutter is located at a block position the shutter blocks the opening when the first operation portion is located at a second position. The shutter is located at the open position when the second operation portion is located at a third position. The shutter is located at the block position when the second operation portion is located at a fourth position.

Abstract: A developing device includes: a casing; a developing roller mounted on the casing, and having a rotational axis extending in an axis direction and a peripheral surface on which a developer is carried, the developing roller being configured to rotate in a rotational direction about the rotational axis; and a seal provided between the casing and the developing roller to prevent the developer from leaking between peripheral surface and the casing. The seal includes: a film member opposed to the peripheral surface of the peripheral surface of the developing roller; and an elastic member provided between the film member and the casing to press the film member against the peripheral surface of developing member. The casing includes a restricting wall provided downstream of the seal member in the rotational direction to restrict the seal from moving in the rotational direction.

Abstract: A developer cartridge includes a cartridge cabinet including a developer accommodating chamber configured to accommodate developer, and a supply opening that is provided in one wall surface and is configured to supply the developer from an inside of the developer accommodating chamber to an outside of the developer accommodating chamber, a rotational shaft that is rotatably supported in the cartridge cabinet, extends parallel to the one wall surface and extends through the inside of the developer accommodating chamber, an agitating blade that is supported by the rotational shaft and rotates with the rotational shaft to supply the developer toward the supply opening while agitating the developer, and an obstruction member that is supported by the rotational shaft and rotates with the rotational shaft following the agitating blade to obstruct the supply opening during rotation of the rotational shaft.

Abstract: A multi-function printer includes an image forming unit and a scanner unit. The image forming unit includes a body casing, a developing unit having a developing roller extending in a lateral direction, a developer cartridge provided on one side of the axis of the developing roller and detachably attached to the body casing, a discharge tray, a side cover, a support unit for supporting the developer cartridge such that the developer cartridge is detachably attached to a front side of the body casing, a sheet feeding tray detachably attachable to the front side of the body casing, and a discharge unit provided on the front side of the body casing and discharging sheet on which an image is formed to the rear side of the body casing. The scanner unit is provided above the image forming unit having a predetermined space opened on the one side therebetween.

Abstract: The developing device includes a casing, a developing roller, a thickness regulating blade, and a seal member. The developing roller has an outer peripheral surface carrying developer. The thickness regulating blade is configured to regulate a thickness of the developer carried on the outer peripheral surface and has an opposed surface confronting the casing. The thickness regulating blade further has one end part supported on the casing and another end part provided with a press member in sliding contact with the outer peripheral surface. The press member is located on the opposed surface and protrudes toward the developing roller. The press member is formed with a receiving portion depressed inward at its widthwise ends in an axial direction of the developing roller. The seal member is disposed between the thickness regulating blade and the casing and contacting at least a part of the receiving portion.

Abstract: A multi-function printer includes an image forming unit and a scanner unit. The image forming unit includes a body casing, a developing unit having a developing roller extending in a lateral direction, a developer cartridge provided on one side of the axis of the developing roller and detachably attached to the body casing, a discharge tray, a side cover, a support unit for supporting the developer cartridge such that the developer cartridge is detachably attached to a front side of the body casing, a sheet feeding tray detachably attachable to the front side of the body casing, and a discharge unit provided on the front side of the body casing and discharging sheet on which an image is formed to the rear side of the body casing. The scanner unit is provided above the image forming unit having a predetermined space opened on the one side therebetween.

Abstract: A developer cartridge includes a housing for accommodating developer, a rotation shaft rotatably supported by the housing and passing across an inside of the housing, a supply opening formed in a wall of the housing opposite in a diameter direction of the rotation shaft, a return opening formed in the wall of the housing at a position displaced from the supply opening in an axial direction of the rotation shaft, a first agitation blade supported by the rotation shaft and passing through a position opposite the return opening along an inner surface of the housing, and a second agitation blade supported by the rotation shaft and passing through a position opposite the supply opening along an inner surface of the housing, wherein the first agitation blade is configured to allow the developer returned through the return opening to flow into the housing.

Abstract: A developer cartridge includes a housing attachable to and detachable from a developing device and accommodating developer and an agitator agitating the developer in the housing and supplying the developer to the developing device through a supply opening of the housing. The agitator includes a rotation shaft, a support plate, a delivery agitation blade supported by the support plate and passing through a position opposing the supply opening along an inner surface of the housing by rotation of the rotation shaft, an entire width of a first end portion of the delivery agitation blade being supported by a distal end portion of the support plate, and an oblique agitation blade erected from a surface of the support plate and oblique to the rotation shaft in order to move the developer in an axial direction of the rotation shaft toward the supply opening.