Abstract: A drum unit usable in a process cartridge includes a photosensitive drum having an axis L1 and a coupling member having an axis L2. The coupling member includes a first end portion connected to the photosensitive drum and a second end portion, with the second end portion including at least one projection that is open to the axis L2 and an outer surface that faces away from the first end portion. For least part of the outer surface, a maximum distance from the axis L2 to the outer surface along a line perpendicular to the axis L2 decreases as the distance along the axis L2 from the first end portion increases.

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: A process cartridge includes a drum unit configured to rotatably hold a photosensitive drum, a developing unit that is assembled in such a manner as to be rotatable relative to the drum unit and includes a developing roller, gap maintaining members provided to the photosensitive drum or the developing roller on both end portions of the photosensitive drum in an axial direction, and urging members configured to bias the developing unit toward the drum unit. The urging members are respectively disposed on outer sides of the gap maintaining members disposed at both end portions in the axial direction. The drum unit or the developing unit includes an electric contact portion configured to come into contact with an electric contact of an image forming apparatus when the process cartridge is attached to the image forming apparatus, the electric contact portion being disposed between the gap maintaining members in the axial direction.

Abstract: The present disclosure provides a process cartridge detachably mountable to an electrophotographic image forming device. The process cartridge includes a housing, a coupling component provided at one end of the housing for receiving rotational driving force from a driving head inside the electrophotographic image forming device, and a limiting protrusion provided at the other end of the housing. The limiting protrusion abuts a lateral wall in the electrophotographic image forming device when the process cartridge is installed into the electrophotographic image forming device, and a guiding surface is provided at the limiting protrusion. Further, the guiding surface abuts the lateral wall in the electrophotographic image forming device, and a rotational axis of the coupling component inclines with respect to a rotational axis of the driving head when the process cartridge is detached from the electrophotographic image forming device.

Abstract: A drum unit usable in the process cartridge includes a photosensitive drum having an axis L1, a drum flange provided at an end of the photosensitive drum, with a part of the drum flange being positioned within the photosensitive drum, and a coupling member having an axis L2. The coupling member includes (i) a first end portion at least a part of which is positioned within the drum flange, and (ii) a second end portion including (ii-i) a surface recessed in the second end portion and facing away from the first end portion and (ii-ii) at least one projection projecting from a surface adjacent to the recessed surface, and (iii) a connecting portion connecting the first end portion and the second end portion.

Abstract: A photosensitive drum is rotatably supported in a main body. A developing cartridge is detachably mountable on the main body in a state where the photosensitive drum is supported in the main body. The developing cartridge includes a developing device and a frame. The developing device includes a developing roller disposed in confrontation with the photosensitive drum to supply developer to the photosensitive drum when the developing cartridge is mounted in the main body, and a developer-accommodating portion configured to accommodate developer. The frame includes a waste-developer-accommodating portion configured to accommodate waste developer and supports the developing device that is movable relative to the frame. The frame is disposed on an opposite side of the developing roller from the photosensitive drum. An urging member is disposed between the frame and the developing device to urge the developing roller toward the photosensitive drum.

Abstract: An image forming apparatus includes an object disposed in an apparatus body so as to be capable of being taken out through an opening; an opening-closing portion that is rotatable and that covers the opening and rotates upward to open the opening; and an operating portion that is rotatable and disposed in front of the opening-closing portion. The operating portion is disposed at a position on a rotation trajectory along which the opening-closing portion rotates upward and on a path along which the object is taken out of the apparatus body. The operating portion rotates forward so as to be retracted from the rotation trajectory and the path along which the object is taken out and so that the path along which the object is taken out is formed between the operating portion and the opening-closing portion in the open state.

Abstract: An image forming apparatus, including a body with an aperture, a processing unit movable between an inside position and an outside position, and a transfer unit, is provided. The processing unit includes first and second drum cleaners to remove waste toner from first and second photosensitive drums respectively; and a waste toner conveyer including a conveyer tube longitudinally extending in a movable direction of the processing unit, a port, a conveyer screw located inside the conveyer tube, and a shutter movable between an opening position and a closed position to open and close the port. The transfer unit includes a belt unit with a belt arranged to contact the first photosensitive drum and the second photosensitive drum, and a belt cleaner including a container with an opening which communicates with the port of the conveyer tube when the processing unit is in the inside position.

Abstract: An electrophotographic photoreceptor includes an intermediate layer, a photosensitive layer, and a surface protective layer, deposited in this order on an electroconductive support. The surface protective layer includes a resin and a p-type semiconductor microparticle contained in the resin. The intermediate layer includes a resin and at least one metal oxide microparticle contained in the resin. The at least one metal oxide microparticle is selected from the group consisting of untreated tin oxide particles, tin oxide particles surface-treated with organic compounds, untreated anatase titanium oxide particles, anatase titanium oxide particles surface-treated with organic compounds, untreated rutile titanium oxide particles, and rutile titanium oxide particles surface-treated with organic compounds.

Abstract: An image forming apparatus includes a mounting portion for mounting a process cartridge, the process cartridge including a first unit having an image bearing drum, and a second unit having a developing roller, the second unit being movable between a contact position in which the roller contacts the drum and a spaced position in which they are mutually spaced; an engageable member engageable with a force receiving portion provided on the second unit; wherein the engageable member is movable between a first position for maintaining the second unit in the spaced position by engaging with the force receiving portion, a second position for permitting movement of the second unit from the spaced position to the contact position; and a third position for permitting the process cartridge to be mounted, by being pressed by the process cartridge to retract, when the process cartridge is mounted to the mounting portion.

Abstract: An image forming apparatus is provided with an image processing unit and a heating controller. The image processing unit includes a charging unit that charges a photoconductor, an electrostatic latent image forming unit that forms an electrostatic latent image by light scanning on the charged photoconductor based on image information, a developing unit that develops the electrostatic latent image, a transfer unit that transfers the developed image to a recording medium, and a fixing unit that fixes the transferred image at least by heating the transferred image. Upon receiving an instruction of execution of recovery processing for recovering sensitivity of the photoconductor that is light-fatigued, the heating controller executes a control so that a temperature of the fixing unit rises at a different time from a time at which the image processing unit performs an image processing operation.

Abstract: A replaceable unit for an electrophotographic image forming device includes an electrical contact positioned within a pocket on a first side of a housing of the replaceable unit. The pocket has an opening facing a front of the housing to permit an electrical connector of the image forming device to enter the pocket and mate with the electrical contact. A first guide wall and a second guide wall are each positioned outside the pocket on the first side, in front of the opening. The first and second guide walls each include an inclined surface that inclines outward from the first side of the housing in a direction from the front to a rear of the housing to move the electrical connector of the image forming device toward the circuit board during insertion of the replaceable unit into the image forming device.

Abstract: An image forming apparatus includes a driven unit, a coupling mechanism, a driving lever and a locking mechanism. The driven unit is configured to be supported slidably between a storage position and a pull-out position. The driving unit is driven by a driving force from a driving source. The coupling mechanism is configured to be switchable between a transmission state and a transmission release state. The driving lever is slidable between a transmission position and a transmission release position. The locking mechanism is configured to prevent the sliding of the driving lever from the transmission release position toward the transmission position. The sliding of the driving lever from the transmission release position into the transmission state can be permitted by the sliding of the driven unit from the pull-out position into the storage position.

Abstract: An electrostatic charge image developer includes an electrostatic charge image developing toner that includes toner particles, and an external additive which is added to the toner particles and which includes silica particles whose compression aggregation degree is from 60% to 95% and particle compression ratio is from 0.20 to 0.40, and a carrier for developing an electrostatic charge image that includes a core particle and a resin coated layer which covers a surface of the core particle and that has a surface roughness Ra (based on JIS-B0601) of 0.5 ?m or less and a circularity of 0.975 or more.

Abstract: An image forming apparatus, comprising: a body casing; a drum unit; a belt unit; and a waste toner storage unit, the drum unit comprising: a photosensitive drum; a cleaning unit; and a conveying unit configured to convey toner removed by the cleaning unit, the belt unit comprising: a belt and a unit electric contact, the conveying unit comprises: a conveying member to convey the toner removed by the cleaning unit in a moving direction of the drum unit; and a conveying tube having a discharging outlet configured to let toner carried by the conveying member be discharged to the waste toner storage unit, wherein the discharging outlet is disposed on a downstream side with respect to a body electric contact in a direction pointing from an inside position to an outside position of the drum unit in a state where the drum unit is disposed at the inside position.

Abstract: A replaceable unit for an image forming device according to one example embodiment includes a housing having a reservoir for storing toner. The replaceable unit includes a rotatable drive coupler and a rotatable shaft that has a cross pin on an axial end of the shaft, generally orthogonal to the shaft. At least a portion of the drive coupler is exposed on an exterior of the housing and unobstructed to receive rotational force when the replaceable unit is installed in the image forming device. A pocket is formed in a first axial side of the drive coupler. The axial end of the shaft and the cross pin are removably positioned in the pocket such that upon rotating the drive coupler in an operative direction rotational force is transferred from surfaces of the drive coupler forming the pocket to the cross pin causing the shaft to rotate with the drive coupler.

Abstract: An image forming method in which a surface layer of an electrophotographic photosensitive member contains a compound having a specific structure in an amount of 0.1% to 10% by mass based on the total mass of the surface layer, and in a charged region of the surface of the electrophotographic photosensitive member charged in a charging step, a non-image forming region in which an electrostatic latent image is not formed is not irradiated with destaticizing light or is irradiated with reduced destaticizing light.

Abstract: A cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, the cartridge includes (i) a rotatable developing roller for developing a latent image formed on a photosensitive member; (ii) a first drive transmission member capable of receiving a rotational force originated by the main assembly; (iii) a second drive transmission member capable of coupling with the first drive transmission member and capable of transmitting the rotational force received by the first drive transmission member to the developing roller; and (iv) a coupling disconnection member including a force receiving portion capable of receiving the force originated by the main assembly, and an urging portion capable of urging at least one of the first drive transmission member and the second drive transmission member by the force received by the force receiving portion to separate one of the first drive transmission member and the second drive transmission member from the other, thereby disconnecting t

Abstract: A toner of the present invention includes at least a colorant and a resin, has crystallinity CX or 20 or greater, and has a dynamic viscoelasticity characteristic in which a logarithmic value Log G?(50) of storage elastic modulus (Pa) at 50° C. is from 6.5 to 8.0 and a logarithmic value Log G?(65) of storage elastic modulus (Pa) at 65° C. is from 4.5 to 6.0, when the dynamic viscoelasticity characteristic is measured by temperature sweep from 40° C., at a frequency of 1 Hz, at a strain amount control of 0.1%, and at a temperature elevating rate of 2° C./min.

Abstract: An image forming apparatus includes an apparatus main body, a cartridge including a supported portion, a moving member configured to move to the apparatus main body and thereby move the cartridge, the moving member moving to the apparatus main body so as to be in an external position and an internal position, a main body side positioning portion provided on the apparatus main body and configured to, when the moving member is in the internal position, support the supported portion, and an upward inclination portion provided on the apparatus main body and inclined upwardly from a movement direction in which the moving member moves from the external position to the internal position. The upward inclination portion causes the cartridge to move upward with respect to the moving member in a process in which the moving member moves from the external position to the internal position.

Abstract: Provided is an end member which allows appropriate transmission of rotary power, and smooth attachment and detachment with respect to an apparatus body. The end member includes a tubular bearing member and a shaft member that is held by the bearing member.

Abstract: An image forming apparatus includes an image carrying member unit having an image carrying member, a developing unit insertable into and drawable out of the image forming apparatus, and a transfer member. The image carrying member unit is movable between a first position where the image carrying member makes contact with the transfer member and a second position where they are apart. The image carrying member unit or the image forming apparatus has a biasing member that biases the image carrying member unit toward the second position. With the developing unit fitted to the image forming apparatus, the image carrying member unit is at the first position against a biasing force of the biasing member. With the developing unit drawn out of the image forming apparatus, the image carrying member unit is at the second position due to the biasing force of the biasing member.

Abstract: A toner cartridge according to one embodiment includes an outlet port positioned on the front of a housing for exiting toner from the toner cartridge. The toner cartridge includes an engagement member having a first engagement surface and a second engagement surface. The first engagement surface is positioned proximate the rear of the housing to receive an actuation force in a frontward direction of the housing at the rear of the housing. The second engagement surface is positioned proximate the front of the housing below the outlet port. The engagement member is movable from a first position to a second position upon receiving the actuation force. As the engagement member moves from the first position to the second position, the second engagement surface moves in the frontward direction and protrudes from the front of the housing with at least a portion of the front of the second engagement surface unobstructed.

Abstract: A drive transmitting unit includes a plurality of gears and a gear case. The plurality of gears composes a part of a gear train transmitting a rotational force from a main driving part to a rotational element within an apparatus body. The gear case is provided attachably to/detachably from an attachment part defined from a lower surface or aback surface of the apparatus body to inside of the apparatus body while rotatably supporting the plurality of gears. The gear case includes a hook part, a fitting part and a fixing part. The hook part is hooked with a hooked part provided within the attachment part. The fitting part is fitted with a fitted part provided within the attachment part. The fixing part is fixed to the apparatus body through a fastening member.

Abstract: An image forming apparatus includes an apparatus body, an image carrier, a developing device, and a developer container. The developing device includes a developer supply port and a mounting section. The developing device is mounted onto a developing position facing the image carrier through a specific insertion path in the apparatus body. The developer container includes a developer discharge port. The developer container is mounted onto the mounting section of the developing device through the insertion path. The developing device is dismounted from the apparatus body through the insertion path after being rotated from the developing position to a standby position in a first direction around a first axis extending in parallel with a rotary axis of the image carrier. The developer container is dismounted from the apparatus body after being rotated in a second direction opposite to the first direction around a second axis in the mounting section.

Abstract: A cartridge for a main assembly of an electrophotographic image forming apparatus. The cartridge includes a rotatable driven coupling member including a driving force receiving portion for receiving a driving force and a driven side abutment to be abutted by a driving side abutment. The coupling member is slidable in a predetermined direction that is substantially parallel to a rotational axis of the coupling member.

Abstract: A nondrive-side side member forms a part of a cartridge and includes a frame portion, and a regulation frame portion provided in the frame portion, to regulate movement of the cartridge. The frame portion has a hole provided to expose an electric contact. Further, a drive-side side member forms a part of a cartridge and includes a frame portion having a first hole and a second hole with a diameter larger than a diameter of the first hole, and a slit portion into which a memory for storing information is to be inserted.

Abstract: An image forming apparatus includes a body, a photoreceptor unit, and a developing unit. The developing unit includes a first attaching/detaching lever that moves a developing sleeve from a first position to a second position by lifting the first attaching/detaching lever. The photoreceptor unit includes a second attaching/detaching lever that moves the developing sleeve from the first position to the second position by lifting the second attaching/detaching lever. The photoreceptor unit and the developing unit move the developing sleeve to the second position by lifting the first or second attaching/detaching lever so that the photoreceptor unit and the developing unit are individually detached from the body.

Abstract: An image forming apparatus includes a main body, a feeding tray, a pickup roller, a developing cartridge, a photosensitive member cartridge, and an exposing unit. The photosensitive member cartridge is configured to be mounted and demounted to and from a photosensitive member cartridge mounting position in the main body through a space under the exposing unit and through an opening of the front wall of the main body in a direction orthogonal to the axis of the pickup roller. The developing cartridge is configured to be mounted and demounted to and from a developing cartridge mounting position in the main body through a space under the exposing unit and through the opening in a direction orthogonal to the axis of the pickup roller, in a state the photosensitive member cartridge remains at the photosensitive member cartridge mounting position in the main body.

Abstract: A photoconductor includes an electroconductive substrate; an intermediate layer overlying the electroconductive substrate; and a photosensitive layer overlying the intermediate layer. The intermediate layer includes a metal oxide particle and a binder resin, and satisfies the following relations (1) and (2): Smr=Scut/Sk??(1) 0.4?Smr?0.6??(2) where Smr represents an areal ratio of concave parts; Sk represents a reference area; and a Scut represents a cross-sectional area obtained by cutting a three-dimensional curved surface obtained from the reference area with an average height surface, the average height surface being a surface constituted of averaged height of all measured height data.

Abstract: An image forming apparatus includes a cartridge supporting member configured to move with respect to a main body of the apparatus in a state in which a cartridge is mounted to take a mounting and demounting position where the cartridge supporting member is located at an exterior of the main body and allowing the cartridge to be mounted and demounted, and an image forming position where the cartridge supporting member is located within an interior of the main body to locate the cartridge at a position which allows formation of an image. A first unit of the cartridge includes a position-restricted portion, and the cartridge is located below a second unit in which the cartridge is mounted on the cartridge supporting member. The cartridge supporting member includes a position restricting portion configured to restrict movement of the cartridge with respect to the cartridge supporting member by engaging the position-restricted portion.

Abstract: An image-forming apparatus includes a first opened/closed signal generation unit for generating a first opened/closed signal indicating an opened/closed state of the open/close member by using polling detection; a second opened/closed signal generation unit for generating a second opened/closed signal in which a state indicating the opened state of the open/close member is latched when a second signal via the switch is cut off; and a power-supply failure detection unit for detecting a power-supply failure based on the first and/or second opened/closed signals. The second opened/closed signal indicates in an initial state the closed state of the open/close member, and is returned to the initial state by an initialization command, and the power-supply failure detection unit detects the power-supply failure based on the second opened/closed signal during an image forming period, and based on the first and second opened/closed signals during a period other than the image forming period.

Abstract: In order to enable a main body of an image forming apparatus to selectively attach and detach a first cartridge group and a second cartridge group, a first guide for positioning the first cartridge group to the main body of the image forming apparatus and a second guide for positioning the second cartridge group to the main body of the image forming apparatus are detachably attachable to the main body of the image forming apparatus.

Abstract: A replaceable unit for an electrophotographic image forming device according to one embodiment includes a housing having a toner reservoir and a circuit board retainer removably mounted on an exterior surface of a first side of the housing. The retainer includes a circuit board mounted on a mounting platform. The circuit board is spaced from the exterior surface of the first side of the housing forming a pocket between the circuit board and the exterior surface of the first side of the housing. The retainer includes an opening facing toward the front of the housing into the pocket formed between the circuit board and the exterior surface of the first side of the housing for receiving an electrical connector of the image forming device that mates with the electrical contacts of the circuit board when the replaceable unit is installed in the image forming device.

Abstract: An image forming apparatus includes a photosensitive drum, a light exposure device, a developing device, a fixing unit disposed opposite to the light exposure device relative to the developing device, a sheet supply tray disposed below the developing device, an ejection tray disposed above the developing device and having a sheet receiving surface inclined downward, relative to a horizontal direction, toward the charger, and a sheet conveying path through which a sheet is conveyed from the sheet supply tray to the ejection tray. A lowest end portion of the sheet receiving surface is disposed below an upper end of the charger in the vertical direction. The charger is disposed opposite to the developing device relative to the lowest end portion of the sheet receiving surface.

Abstract: Techniques are provided for assisting owners to recover missing devices. The missing device automatically performs certain actions proactively in response to detecting conditions that indicate that the device has been lost or stolen. Conditions that indicate the device has been lost or stolen (“triggering conditions”) may include that a password failure has occurred more than a predetermined number of times. Any number and type of recovery-assisting actions may be taken, in response to triggering conditions, to assist owners in recovering a missing device. For example, a device may generate a record that indicates the current location of the device, and synchronize the record with an online service or some other device. The generation and synchronization of such records may be repeated on a periodic basis until either (a) the device becomes disabled, or (b) a user enters an appropriate password.

Abstract: Printers are disclosed herein. An example printer includes a housing; a non-refillable toner container permanently affixed within the housing, the toner container having a capacity sufficient to store enough toner to print a first number of pages that corresponds to an expected useful life of the printer; and a processor responsive to an input to enable a second number of pages to be printed by the printer, the second number of pages being less than the first number of pages.

Abstract: An image forming assembly including a first assembly that includes an image holding member which rotates by receiving a rotational driving force and holds a toner image after an electrostatic latent image is formed thereon by exposure and the toner image is formed by development and a supporting member which supports the image holding member, a second assembly that includes a developing member which is disposed adjacent to the image holding member, rotates by receiving a rotational driving force, and transports a toner to a developing region facing the image holding member and a toner holding member which holds the toner and supplies the toner to the developing member, and a connection member that includes a pressing member in which a first through hole and a second through hole are formed and that is fixed to the supporting member.

Abstract: A rotating force transmitting mechanism has a rotating member supported on a base plate. The base plate is formed with a bearing part in a bottomed cylindrical shape protruded by extruding. The rotating member is formed with a cylindrical rotating shaft part capable of fitting to the bearing part. The rotating member is supported on the base plate such that the rotating shaft part rotates while sliding with the bearing part.

Abstract: A manufacturing method of a cartridge that is detachably mountable to an apparatus main assembly of an image forming apparatus. The manufacturing method includes a step of integrally molding a cartridge electrode with a frame in a manner such that a mold is contacted to the frame to form a space including a first portion for forming a first contact portion, a second portion for forming a second contact portion, and a connecting portion branching from an injection portion into the first portion and the second portion, and electroconductive resin is injected into the space.

Abstract: An image forming apparatus in which an apparatus main body has: an insertion port through which a process cartridge cannot pass when an image bearing member and a developer bearing member are separated from each other and through which the process cartridge can pass when the image bearing member and the developer bearing member are in contact with each other; and guides that guide one of a first frame and a second frame when the process cartridge is inserted into the insertion port. The image forming apparatus has a separation mechanism that separates the image bearing member and the developer bearing member from each other when the process cartridge is further inserted after the other of the first frame and second frame has passed through the insertion port.

Abstract: An image forming apparatus includes a movement member arranged to move a cartridge and is movable between a first position for disposing the cartridge at a position where image formation is possible and a second position where the cartridge is attachable to and detachable from the movement member. At least one coupling provided in the cartridge is, when the movement member is at the first position, moved to a drive position where the coupling is arranged to engage with a drive member to rotate at least one rotating member, and while the movement member is being moved from the second to first positions, the at least one coupling is at an inclined position.

Abstract: An image forming apparatus includes a main body, a process cartridge, and a supporting frame. The process cartridge has a photosensitive drum defining a rotation axis extending in an axial direction, and an urging portion. The supporting frame is configured to support the process cartridge and be movable in a sliding direction between an inner position and an outer position of the main body. The urging portion is configured to exert urging force on the process cartridge in the state where the supporting frame supporting the process cartridge is in the inner position, such that the process cartridge is moved to the second position from the first position.

Abstract: The invention relates to a process cartridge, which comprises a process cartridge housing, a photosensitive member, a driving force receiving opening, a retractable mechanism and a control mechanism, wherein the photosensitive member is arranged inside the process cartridge housing; the driving force receiving opening is connected with the photosensitive member and provides a driving force for the photosensitive member; the retractable mechanism allows the driving force receiving opening to extend or retract in the axial direction of the photosensitive member; and the control mechanism controls the extension and retraction of the retractable mechanism.

Abstract: An image bearing member unit includes an image bearing member for bearing a toner image; a bearing portion which rotatably supports the image bearing member and is coaxial with a rotational axis of the image bearing member and which includes an arcuate portion for forming a circumferential part of a circle larger than the image bearing member; a holding portion, capable of permitting insertion of the bearing portion in a rotational axis direction of the image bearing member, for holding the bearing portion; and a passing portion, provided in the holding portion, for permitting passage of the arcuate portion therethrough in the rotational axis direction. The passing portion is provided so that a phase of the arcuate portion when the bearing portion is mounted at a normal position and a phase of the passing portion are different from each other.

Abstract: A CRUM unit which is mountable/dismountable on an image forming apparatus is disclosed. The CRUM unit includes a power extracting circuit configured to, when a clock signal is received from an image forming apparatus, extract power from a high value of the clock signal and store in a capacitive element and a controller configured to operate using the extracted power, wherein the clock signal has a first pulse width in a data section where a data signal is received and transmitted, and has a second pulse width which is different from the first pulse width in an pause section where a data signal is not received.

Abstract: A drum unit usable in the process cartridge includes a photosensitive drum having an axis L1, a drum flange provided at an end of the photosensitive drum, with a part of the drum flange being positioned within the photosensitive drum, and a coupling member having an axis L2. The coupling member includes (i) a first end portion at least a part of which is positioned within the drum flange, and (ii) a second end portion including (ii-i) a surface recessed in the second end portion and facing away from the first end portion and (ii-ii) at least one projection projecting from a surface adjacent to the recessed surface, and (iii) a connecting portion connecting the first end portion and the second end portion.

Abstract: A drum unit usable in the process cartridge includes a photosensitive drum having an axis L1 and a coupling member having an axis L2. The coupling member includes a first end portion connected with the photosensitive drum, a second end portion having an outermost surface, an axle portion connecting the first end portion and the second end portion to each other, and at least one projection extending from the second end portion. For at least part of the outermost surface of the second end portion, a maximum distance from the axis L2 to the outermost surface along a line perpendicular to the axis L2 increases as the distance along the axis L2 from the axle portion increases.

Abstract: A cartridge insertable into a main assembly of an image forming apparatus includes a first unit including a first bearing portion for supporting an image bearing member, a second unit including a second bearing portion for supporting a developer carrying member, and a storing medium including an electrical contact. The second bearing portion is provided inside the first bearing portion with respect to a rotational axis direction of the image bearing member. At least a part of the storing medium is supported by the second unit and is provided at a position outside the second bearing portion and inside an outermost configuration of the first unit with respect to the rotational axis direction. The electrical contact is faced toward a downstream with respect to an inserting direction of the cartridge into the main assembly.

Abstract: A process cartridge comprises: a developing cartridge; and a photosensitive member cartridge receiving the developing cartridge. The photosensitive member cartridge comprises a photosensitive member, and a pressing member configured to press the developing cartridge. The developing cartridge is configured to be located at a first position at which it is pressed by the pressing member and at a second position at which it is separable from the photosensitive member cartridge. The developing cartridge comprises: a driving mechanism including a detected member, and a covering member configured to cover the driving mechanism. The covering member comprises: a receiving part protruding configured to receive at least a part of the detected member; and an abutting part continuing to the receiving part, the abutting part being configured to abut on a member in the image forming apparatus main body and to move the developing cartridge to the first position.