Abstract: An image forming apparatus includes: a housing; a drum cartridge as a first cartridge including a photosensitive drum; a second cartridge accommodating toner; and a drawer movable between an inside position where the drawer in its entirety is positioned inside the housing and an outside position where at least a part of the drawer is positioned outside the housing. The drum cartridge is attachable to and detachable from the drawer. The drawer includes: a side plate configured to receive the photosensitive drum; and a locking member supported by the side plate. The locking member is movable relative to the side plate between a locking position where the locking member locks the photosensitive drum to the side plate and an unlocking position where the locking member unlocks the photosensitive drum from the side plate in an attached state of the drum cartridge to the drawer.

Abstract: A process cartridge includes: a drum cartridge; and a developing cartridge. The drum cartridge includes: a drum frame; a photosensitive drum rotatable about a first axis extending in a first direction; and a first memory having a first electrical contact surface. The developing cartridge is attachable to the drum frame and includes: a casing; a developing roller rotatable about a second axis extending in the first direction; a second memory having a second electrical contact surface; and a developing holder holding the second electrical contact surface such that the second electrical contact surface is movable relative to the casing. The drum cartridge further includes an elastic member that can expand and contract in a second direction crossing the first direction. The developing holder is connected to the elastic member and is movable in the second direction in a state where the developing cartridge is attached to the drum frame.

Abstract: A drum cartridge includes: a drum frame; a photosensitive drum; a first memory; and second memory. A developing cartridge including a developing roller is attachable to the drum frame. The photosensitive drum is rotatable about a first axis extending in a first direction. The photosensitive drum is configured to contact the developing roller in a state where the developing cartridge is attached to the drum frame. The first memory has a first electrical contact surface. The first memory stores therein information related to the drum cartridge. The second memory has a second electrical contact surface different from the first electrical contact surface. The second memory stores therein information related to the developing cartridge. The first electrical contact surface and the second electrical contact surface are positioned at an outer surface of the drum frame.

Abstract: A process cartridge includes: a drum cartridge; a developing cartridge; and a plate. The drum cartridge includes: a drum frame; a photosensitive drum; a first holder; and a first memory having a first electrical contact surface that is movably supported by the first holder. The developing cartridge is attachable to the drum frame. The developing cartridge includes: a casing; a developing roller; a second holder; and a second memory having a second electrical contact surface that is movably supported by the second holder. The plate connects the first holder and the second holder to each other in a state where the developing cartridge is attached to the drum frame. The second holder moves together with the plate in accordance with movement of the first holder in a state where the plate connects the first holder and the second holder to each other.

Abstract: An image forming apparatus includes a main housing, a movable drawer, and a process cartridge attachable to the drawer. The process cartridge includes a drum unit, and a developing unit. The drum unit includes a drum housing, and a photosensitive drum rotatable about a first axis extending in a first direction. The photosensitive drum is positioned at one end portion of the drum housing at one side in a second direction. The developing unit includes a developing casing, a developing roller, and a developing handle for detaching the process cartridge from the drawer toward another side in the second direction. The developing roller is positioned at one end portion of the developing casing at the one side in the second direction. The developing handle is positioned apart from the drum unit toward the another side in the second direction.

Abstract: A developing cartridge may include: a casing; a developing roller extending in a first direction; a developing-roller gear; a coupling including a coupling gear; a first idle gear; a second idle gear; an agitator; a first agitator gear; and a protrusion. The developing-roller gear, the coupling, the first idle gear, the second idle gear, the first agitator gear, and the protrusion may be positioned at an outer surface of the casing. The protrusion may be positioned between a first axis of the coupling and a third axis of the first agitator gear in a second direction connecting the first and third axes. The protrusion may be positioned outside an addendum circle of the developing-roller gear, an addendum circle of the coupling gear, an addendum circle of the first idle gear, and an addendum circle of the second idle gear. The first agitator gear may be spaced apart from the protrusion in the first direction.

Abstract: An image forming apparatus includes an apparatus main body, a drawer, a drum cartridge, an exposure device, a fixing device, and a toner cartridge. The drum cartridge includes a photosensitive drum, a cleaning member, a developing device, a waste toner conveying pipe, and a frame. The toner cartridge includes a toner container and a waste toner container. The cleaning member is located between the photosensitive drum and the fixing device in a vertical direction in the state where the drum cartridge is mounted to the drawer and the drawer is located at an inner position. The drum cartridge is capable of being mounted to the drawer. The toner cartridge is attachable to and detachable from the drum cartridge.

Abstract: An image forming apparatus includes: a main body housing; a developing cartridge attachable to and detachable from the main body housing; a drum cartridge attachable to and detachable from the main body housing; and a developing guide for guiding attachment and detachment of the developing cartridge to and from the main body housing. The developing cartridge includes a developing roller and a developing memory for storing information. The drum cartridge includes a photosensitive drum. The developing guide is movable together with the developing cartridge between a first position where the developing roller is in contact with the photosensitive drum and a second position where the developing roller is separated from the photosensitive drum. The developing guide includes a developing memory terminal configured to be in contact with the developing memory in a state where the developing cartridge is attached to the main body housing.

Abstract: An image forming apparatus, including a process cartridge and a main body with an opening and a cartridge supporter is provided. The process cartridge includes a drum cartridge; a toner cartridge attachable to the drum cartridge; and a switching member switchable states in the process cartridge between a first state, wherein detachment of the toner cartridge is restricted, and a second state, wherein the toner cartridge is released from the restriction. The cartridge supporter is movable between a first position, wherein the cartridge supporter supports the process cartridge to be placed entirely in an inner space in the main body on an inner side of the opening, and a second position, wherein the cartridge supporter supports the process cartridge to be at least partly placed outside the inner space. When the cartridge supporter is in the second position, the switching member is at least partly placed outside the inner space.

Abstract: An image forming apparatus includes: a main casing; a photosensitive drum rotatable about an axis extending in a first direction; a developing cartridge; a transfer unit; a solvent cartridge accommodating solvent for dissolving toner; an applicator applying the solvent to the toner on a sheet; and a cover movable between an open position and a closed position. The developing cartridge and the solvent cartridge are detachably attachable to the main casing independently of each other. The developing cartridge and the solvent cartridge are positioned between the applicator and the cover in a second direction crossing the first direction, and the solvent cartridge is positioned closer to the applicator than the developing cartridge is to the applicator in a state where the developing cartridge and the solvent cartridge are attached to the main casing and the cover is at the closed position.

Abstract: An image forming apparatus includes a main casing, a drum cartridge and a developing cartridge. The drum cartridge may include a first handle positioned at a first end of a frame of the drum cartridge. The developing cartridge may include a second handle positioned at a first end of a developing casing the developing cartridge. The main casing may include a first edge surface in the axial direction and a second edge surface opposite the first edge surface in the axial direction. The second handle may extend farther from the second edge surface than the first handle extends from the second edge surface in the axial direction in a state where the drum cartridge and the developing cartridge are attached to the main casing.

Abstract: In a developing cartridge, a first supporting member is attached to a housing and has a first developing supporting portion and a driving-force-receiving-member supporting portion, the first developing supporting portion being configured to rotatably support a first part of a rotational shaft, the driving-force-receiving-member supporting portion being configured to rotatably support a driving-force-receiving member. The second supporting member is attached to the housing and has a second developing supporting portion and a detection-rotational-body supporting portion, the second developing supporting portion being configured to rotatably support a second part of the rotational shaft, the detection-rotational-body supporting portion being configured to rotatably support a detection rotational body.

Abstract: A developing cartridge includes a casing, a developing roller rotatable about an axis extending in a first direction, a developing memory having an electrical contact surface, an agitator, an agitator gear rotatable about an agitator axis together with the agitator, a holder holding the electrical contact surface, and a plate movable between a first position and a second position in a second direction crossing the first direction relative to the casing. The holder is movable relative to the casing in a third direction crossing the first and second directions between a retracted position and an advancing position. The holder is movable from the retracted position to the advancing position in response to a movement of the plate from the first position to the second position. The plate is positioned farther away from the developing roller than the agitator gear and the holder are in the second direction.

Abstract: An image forming apparatus includes: a main body housing; a developing cartridge attachable to and detachable from the main body housing; a drum cartridge attachable to and detachable from the main body housing; and a developing guide for guiding attachment and detachment of the developing cartridge to and from the main body housing. The developing cartridge includes a developing roller and a developing memory for storing information. The drum cartridge includes a photosensitive drum. The developing guide is movable together with the developing cartridge between a first position where the developing roller is in contact with the photosensitive drum and a second position where the developing roller is separated from the photosensitive drum. The developing guide includes a developing memory terminal configured to be in contact with the developing memory in a state where the developing cartridge is attached to the main body housing.

Abstract: An image forming apparatus, including a process cartridge and a main body with an opening and a cartridge supporter is provided. The process cartridge includes a drum cartridge; a toner cartridge attachable to the drum cartridge; and a switching member switchable states in the process cartridge between a first state, wherein detachment of the toner cartridge is restricted, and a second state, wherein the toner cartridge is released from the restriction. The cartridge supporter is movable between a first position, wherein the cartridge supporter supports the process cartridge to be placed entirely in an inner space in the main body on an inner side of the opening, and a second position, wherein the cartridge supporter supports the process cartridge to be at least partly placed outside the inner space. When the cartridge supporter is in the second position, the switching member is at least partly placed outside the inner space.

Abstract: A developing cartridge includes: a casing; a developing roller rotatable about an axis extending in a first direction; a first agitator; an agitator gear; a first protrusion; a developing memory; a first electrical contact surface; and a first holder holding the first electrical contact surface. The agitator gear includes a large diameter gear and a small diameter gear positioned between the large diameter gear and the casing in the first direction. The first protrusion protrudes outward from one end of the casing in the first direction, and is positioned between the casing and the large diameter gear in the first direction. The first protrusion is positioned away from the small diameter gear. The first holder is positioned farther from the first protrusion than the large diameter gear is in the first direction. The first holder and the first electrical contact surface are movable relative to the casing.

Abstract: A developing cartridge includes a casing, a developing roller rotatable about an axis extending in a first direction, a developing memory having an electrical contact surface, an agitator, an agitator gear rotatable about an agitator axis together with the agitator, a holder holding the electrical contact surface, and a plate movable between a first position and a second position in a second direction crossing the first direction relative to the casing. The holder is movable relative to the casing in a third direction crossing the first and second directions between a retracted position and an advancing position. The holder is movable from the retracted position to the advancing position in response to a movement of the plate from the first position to the second position. The plate is positioned farther away from the developing roller than the agitator gear and the holder are in the second direction.

Abstract: An image forming apparatus includes: a main body housing; a developing cartridge attachable to and detachable from the main body housing; a drum cartridge attachable to and detachable from the main body housing; and a developing guide for guiding attachment and detachment of the developing cartridge to and from the main body housing. The developing cartridge includes a developing roller and a developing memory for storing information. The drum cartridge includes a photosensitive drum. The developing guide is movable together with the developing cartridge between a first position where the developing roller is in contact with the photosensitive drum and a second position where the developing roller is separated from the photosensitive drum. The developing guide includes a developing memory terminal configured to be in contact with the developing memory in a state where the developing cartridge is attached to the main body housing.

Abstract: In a developing cartridge, a first supporting member is attached to a housing and has a first developing supporting portion and a driving-force-receiving-member supporting portion, the first developing supporting portion being configured to rotatably support a first part of a rotational shaft, the driving-force-receiving-member supporting portion being configured to rotatably support a driving-force-receiving member. The second supporting member is attached to the housing and has a second developing supporting portion and a detection-rotational-body supporting portion, the second developing supporting portion being configured to rotatably support a second part of the rotational shaft, the detection-rotational-body supporting portion being configured to rotatably support a detection rotational body.

Abstract: A developing cartridge includes: a casing; a developing roller rotatable about an axis extending in a first direction; a first agitator; an agitator gear; a first protrusion; a developing memory; a first electrical contact surface; and a first holder holding the first electrical contact surface. The agitator gear includes a large diameter gear and a small diameter gear positioned between the large diameter gear and the casing in the first direction. The first protrusion protrudes outward from one end of the casing in the first direction, and is positioned between the casing and the large diameter gear in the first direction. The first protrusion is positioned away from the small diameter gear. The first holder is positioned farther from the first protrusion than the large diameter gear is in the first direction. The first holder and the first electrical contact surface are movable relative to the casing.