Abstract: A process cartridge which is capable of being carried on a movable guide provided in the main assembly of an electrophotographic image forming apparatus and which is movable from a receiving position toward a mount position in interrelation with movement of the movable guide, includes an electrophotographic photosensitive drum; process means actable on the drum; a cartridge frame supporting the drum and the process means; a first portion to be carried, provided at one longitudinal end of the drum, for being supported by the movable guide; a second portion to be carried, provided at the other longitudinal end of the drum, for being supported by the movable guide; a first positioning portion to be positioned relative to a main assembly, the first positioning portion extending outwardly from the cartridge frame adjacent the other longitudinal end of the drum; a second positioning portion to be positioned relative to the main assembly, the second positioning portion extending outwardly from the cartridge frame ad

Abstract: A process cartridge and an image forming apparatus which can stably keep a developing separated state for a long period by a compact construction, and in which when a separating member has been mounted on the process cartridge, the separating member is supported in a center impeller fashion by one frame, and the other frame is supported by a portion therebetween to thereby keep the developing separated state.

Abstract: A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, the main assembly including an opening, a door movable between a close position for closing the opening and an open position for opening the opening, a first force application member movable with movement of the door from the open position to the closing position and a second force application member movable by a driving force from a driving source, the process cartridge includes an electrophotographic photosensitive drum; a developing roller for developing an electrostatic latent image formed on the electrophotographic photosensitive drum; a drum unit containing the electrophotographic photosensitive drum; a developing unit which contains the developing roller and which is movable relative to the drum unit such that developing roller is movable between a contact position in which the developing roller is contacted to the electrophotographic photosensitive drum and a spaced position in which the deve

Abstract: Disclosed are a developing device, a developing cartridge, a process cartridge, and an image forming apparatus in which image deficiency is prevented by absorbing the tolerance of each component and making the position of the developing roller in the thrust direction constant and which are easy to assemble. A frame member is equipped with an urging unit that axially urges the developing roller, the urging unit urging the developing roller in the direction of movement of the developing roller by the thrust force of a helical gear when a driving force is transmitted to the developing roller, to thereby make the position of the developing roller in the thrust direction constant.

Abstract: A process cartridge remanufacturing method including the steps of: separating photosensitive drum and developing units; dismounting a first side cover member; a dismounting a first gear group from a first bearing member; dismounting a supporting member from the first bearing member; dismounting a second gear group from the first bearing member; dismounting the first bearing member; dismounting a developing roller; dismounting a developing blade; filling a developer into a developer accommodating portion; mounting the developing blade; mounting the developing roller; mounting the second gear group, mounting the supporting member; mounting the first gear group; mounting the first side cover member; and rotatably connecting the photosensitive drum and developing units.

Abstract: A process cartridge and an image forming apparatus which can stably keep a developing separated state for a long period by a compact construction, and in which when a separating member has been mounted on the process cartridge, the separating member is supported in a center impeller fashion by one frame, and the other frame is supported by a portion therebetween to thereby keep the developing separated state.

Abstract: A process cartridge transportable when mounted in a main assembly of an electrophotographic image forming apparatus. The cartridge includes an electrophotographic photosensitive drum, a developing roller for developing an electrostatic latent image on the drum when in contact with the drum, a drum unit supporting the drum, a developing unit supporting the roller and connected with the drum unit for rotation between a contact position in contact with the drum and a separated position, a force receiving portion for receiving, from the main assembly, a force for moving the developing unit from the contact to the separated position, with the cartridge mounted in the main assembly, a separation member for maintaining the developing unit at a position where the developing roller and the drum are separated from each other, and a detection portion to detect the mounting of the separation member when the cartridge mounted in the main assembly.

Abstract: A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus for forming an image on a recording material, the process cartridge includes an electrophotographic photosensitive drum; a drum shaft for being rotated by a driving force supplied from the main assembly of the apparatus and for transmitting a rotating force to the electrophotographic photosensitive drum; and a notification member, movably provided on the drum shaft, for notifying, when the process cartridge is mounted to the main assembly of the apparatus, that process cartridge has reached at least a state that process cartridge has been used for image formation, wherein when the main assembly of the apparatus detects that process cartridge has reached the state, the drum shaft is rotated in a direction opposite to a rotational direction for the image formation to make the notification.

Abstract: A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, the process cartridge includes an electrophotographic photosensitive drum, a charging member for electrically charging the electrophotographic photosensitive drum, wherein the charging member is supplied with a charging bias voltage received from the main assembly of the electrophotographic image forming apparatus when the process cartridge is mounted to the main assembly of the electrophotographic image forming apparatus; and a charging member rubbing member having an insulative property and provided contacted to the charging member along a longitudinal direction of the charging member; wherein the charging member is contacted within a longitudinally extending range to electrically charge the electrophotographic photosensitive drum, and wherein the charging member rubbing member is disposed between the electroconductive member and the charging member beyond an end of the range to prevent leakage of

Abstract: A seal member for sealing the developer container at a boundary between the developer container and a developer carrying member is disposed at an opening of a developer container containing developer. The sealing member includes a warp pile fabric, and is formed by a V pile weave providing a V-shaped pile fabric texture. The seal member has a fiber density, representing a number of fibers per unit area, of not less than 260,000/inch2 and not more than 680,000/inch2 and has a number of denier per one pile of not less than 200 denier and not more than 350 denier.

Abstract: When a space holding member for holding a photosensitive drum and a developing roller in a spaced-apart state act on a process cartridge main body, the photosensitive drum and the developing roller are held in the spaced-apart state, and when the holding member is acting on a process cartridge, a storing medium provided in the process cartridge and the communication member of the storing medium are covered and hidden by the holding member. By the above-described construction, the spacing-apart of the developing roller and the protection of the storing medium can be effected by a member, and an improvement in usability and the curtailment of the number of parts can be achieved.

Abstract: A process cartridge, detachably mountable to a main assembly of an electrophotographic image forming apparatus includes an electrophotographic photosensitive drum; a developer accommodating portion; a developing roller for developing a latent image formed on the drum using the developer accommodated in the accommodating portion; a developer supply roller; a developing device frame supporting the developing roller and the developer supply roller and having the developer accommodating portion; a first gear having a driving force receiving gear portion which is engaged with a main assembly gear when the process cartridge is mounted to the main assembly; a second gear provided inside the driving force receiving gear portion in a longitudinal direction of the developing device frame and being effective to transmit the driving force received by the first gear to the developer supply roller; and a supporting member, disposed between the first gear and the second gear with respect to the longitudinal direction of the

Abstract: Disclosed are a developing device, a developing cartridge, a process cartridge, and an image forming apparatus in which image deficiency is prevented by absorbing the tolerance of each component and making the position of the developing roller in the thrust direction constant and which are easy to assemble. A frame member is equipped with an urging unit that axially urges the developing roller, the urging unit urging the developing roller in the direction of movement of the developing roller by the thrust force of a helical gear when a driving force is transmitted to the developing roller, to thereby make the position of the developing roller in the thrust direction constant.

Abstract: Disclosed are a developing device, a developing cartridge, a process cartridge, and an image forming apparatus in which image deficiency is prevented by absorbing the tolerance of each component and making the position of the developing roller in the thrust direction constant and which are easy to assemble. A frame member is equipped with an urging unit that axially urges the developing roller, the urging unit urging the developing roller in the direction of movement of the developing roller by the thrust force of a helical gear when a driving force is transmitted to the developing roller, to thereby make the position of the developing roller in the thrust direction constant.

Abstract: A process cartridge which is capable of being carried on a movable guide provided in the main assembly of an electrophotographic image forming apparatus and which is movable from a receiving position toward a mount position in interrelation with movement of the movable guide, includes an electrophotographic photosensitive drum; process means actable on the drum; a cartridge frame supporting the drum and the process means; a first portion to be carried, provided at one longitudinal end of the drum, for being supported by the movable guide; a second portion to be carried, provided at the other longitudinal end of the drum, for being supported by the movable guide; a first positioning portion to be positioned relative to a main assembly, the first positioning portion extending outwardly from the cartridge frame adjacent the one longitudinal end of the drum; a second positioning portion to be positioned relative to the main assembly, the second positioning portion extending outwardly from the cartridge frame adja

Abstract: A process cartridge which is capable of being carried on a movable guide provided in the main assembly of an electrophotographic image forming apparatus and which is movable from a receiving position toward a mount position in interrelation with movement of the movable guide, includes an electrophotographic photosensitive drum; process means actable on the drum; a cartridge frame supporting the drum and the process means; a first portion to be carried, provided at one longitudinal end of the drum, for being supported by the movable guide; a second portion to be carried, provided at the other longitudinal end of the drum, for being supported by the movable guide; a first positioning portion to be positioned relative to a main assembly, the first positioning portion extending outwardly from the cartridge frame adjacent the other longitudinal end of the drum; a second positioning portion to be positioned relative to the main assembly, the second positioning portion extending outwardly from the cartridge frame ad

Abstract: A process cartridge remanufacturing method including the steps of: (a) separating photosensitive drum and developing units; (b) dismounting a first side cover member; (c) a dismounting a first gear group from a first bearing member; (d) dismounting a supporting member from the first bearing member; (e) dismounting a second gear group from the first bearing member; (f) dismounting the first bearing member; (g) dismounting a developing roller; (h) dismounting a developing blade; (i) filling a developer into a developer accommodating portion; (j) mounting the developing blade; (k) mounting the developing roller; (l) mounting the second gear group, (m) mounting the supporting member; (n) mounting the first gear group; (o) mounting the first side cover member; and (p) rotatably connecting the photosensitive drum and developing units.

Abstract: A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, the process cartridge includes an electrophotographic photosensitive drum; a developer accommodating portion for accommodating a developer; a developing roller for developing a latent image formed on the drum using the developer accommodated in the accommodating portion; a developer supply roller for supplying he developer to the developing roller; a developing device frame supporting the developing roller and the developer supply roller and having the developer accommodating portion; a first gear provided at one longitudinal end side of the developing device frame, the first gear has a driving force receiving gear portion which is engaged with a main assembly gear provided in the main assembly when the process cartridge is mounted to the main assembly; a second gear provided inside the driving force receiving gear portion in a longitudinal direction of the developing device frame, the second gear be

Abstract: A seal member for sealing the developer container at a boundary between the developer container and a developer carrying member is disposed at an opening of a developer container containing developer. The sealing member includes a warp pile fabric, and is formed by a V pile weave providing a V-shaped pile fabric texture. The seal member has a fiber density, representing a number of fibers per unit area, of not less than 260,000/inch2 and not more than 680,000/inch2 and has a number of denier per one pile of not less than 200 denier and not more than 350 denier.

Abstract: A process cartridge which is capable of being carried on a movable guide provided in the main assembly of an electrophotographic image forming apparatus and which is movable from a receiving position toward a mount position in interrelation with movement of the movable guide, includes an electrophotographic photosensitive drum; process means actable on the drum; a cartridge frame supporting the drum and the process means; a first portion to be carried, provided at one longitudinal end of the drum, for being supported by the movable guide; a second portion to be carried, provided at the other longitudinal end of the drum, for being supported by the movable guide; a first positioning portion to be positioned relative to a main assembly, the first positioning portion extending outwardly from the cartridge frame adjacent the one longitudinal end of the drum; a second positioning portion to be positioned relative to the main assembly, the second positioning portion extending outwardly from the cartridge frame adja