Abstract: A developer feeding member for use with an electrophotographic image forming apparatus to feed a developer accommodated in a developer accommodating portion, includes a shaft for receiving a driving force to rotate when the shaft is mounted in the developer accommodating portion; a flexible sheet for feeding the developer accommodated in the developer accommodating portion when the flexible sheet is mounted in the developer accommodating portion; a mounting member for mounting the flexible sheet on the shaft such that the flexible sheet is movable relative to the shaft in a longitudinal direction, in a widthwise direction and in a thickness direction.

Abstract: A developer feeding member for use with an electrophotographic image forming apparatus to feed a developer accommodated in a developer accommodating portion, includes a shaft for receiving a driving force to rotate when the shaft is mounted in the developer accommodating portion; a flexible sheet for feeding the developer accommodated in the developer accommodating portion when the flexible sheet is mounted in the developer accommodating portion; a mounting member for mounting the flexible sheet on the shaft such that the flexible sheet is movable relative to the shaft in a longitudinal direction, in a widthwise direction and in a thickness direction.

Abstract: A developer feeding member for use with an electrophotographic image forming apparatus to feed a developer accommodated in a developer accommodating portion, includes a shaft for receiving a driving force to rotate when the shaft is mounted in the developer accommodating portion; a flexible sheet for feeding the developer accommodated in the developer accommodating portion when the flexible sheet is mounted in the developer accommodating portion; a mounting member for mounting the flexible sheet on the shaft such that flexible sheet is movable relative to the shaft in a longitudinal direction, in a widthwise direction and in a thickness direction.

Abstract: A developer feeding member for use with an electrophotographic image forming apparatus to feed a developer accommodated in a developer accommodating portion, includes a shaft for receiving a driving force to rotate when the shaft is mounted in the developer accommodating portion; a flexible sheet for feeding the developer accommodated in the developer accommodating portion when the flexible sheet is mounted in the developer accommodating portion; a mounting member for mounting the flexible sheet on the shaft such that the flexible sheet is movable relative to the shaft in a longitudinal direction, in a widthwise direction and in a thickness direction.

Abstract: A developer feeding member for use with an electrophotographic image forming apparatus to feed a developer accommodated in a developer accommodating portion, includes a shaft for receiving a driving force to rotate when the shaft is mounted in the developer accommodating portion; a flexible sheet for feeding the developer accommodated in the developer accommodating portion when the flexible sheet is mounted in the developer accommodating portion; a mounting member for mounting the flexible sheet on the shaft such that the flexible sheet is movable relative to the shaft in a longitudinal direction, in a widthwise direction and in a thickness direction.

Abstract: A developer feeding member for use with an electrophotographic image forming apparatus to feed a developer accommodated in a developer accommodating portion, includes a shaft for receiving a driving force to rotate when the shaft is mounted in the developer accommodating portion; a flexible sheet for feeding the developer accommodated in the developer accommodating portion when the flexible sheet is mounted in the developer accommodating portion; a mounting member for mounting the flexible sheet on the shaft such that flexible sheet is movable relative to the shaft in a longitudinal direction, in a widthwise direction and in a thickness direction.

Abstract: A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, includes an electrophotographc photosensitive drum; a developlng member for developing an electrostatic latent image formed on the electrophotographic photosensitive drum with a developer; charging member for electrically charging the drum; a drum frame supporting the charging member and the drum; a developer accomodation frame having a developer accomodating portion for accomodating the developer; a supporting frame supporting the drum frame and the developer accomodation frame adjacent one logitudinal end of the drum; a developing bias contact, provided on the supporting frame, for receiving a developing bias voltage applied to the developing member from the main assembly of the apparatus when the process cartridge is mounted to the main assembly of the apparatus; and a charging bias contact, provided on the supporting frame, for receiving a charging bias applied to the charging member from the mai

Abstract: A remanufacturing method for a process cartridge includes (a) removing the second end cover at the other longitudinal ends of the drum frame, the developing frame and the developer frame; (b) removing a drum shaft rotatably supporting the drum; (c) separating the drum and the developing roller from each other; (d) moving the drum outwardly from the process cartridge, so that the drum is inclined, and then removing the drum from the drum frame; (e) inserting one end of a new drum such that a driving force receiving portion is exposed outside the drum frame, and inserting the drum shaft from outside of the drum frame; (f) opening a filling port provided in the developer accommodating portion, refilling the developer and then closing the filling port; and (g) fixedly mounting a second end cover to the other longitudinal ends of the drum frame, the developing frame and the developer frame.

Abstract: A remanufacturing method for a process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, includes an end cover removing step of cutting a fixing portion between a first end cover and a drum holding frame and cutting a fixing portion between the first end cover and a developer accommodating frame, and removing the first end cover at a longitudinal end of the drum holding frame, a developing means frame and the developer accommodating frame; and an end cover removing step of cutting a fixing portion between a second end cover and the drum holding frame and cutting a fixing portion between the second end cover and the developer accommodating frame, and removing the second end cover at a longitudinal end of the drum holding frame, the developing means frame and the developer accommodating frame.

Abstract: A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, includes a cartridge frame; an electrophotographic photosensitive drum; a charger for charging the drum; a developing member for developing an latent image on the drum; a developer accommodating portion; an engaging member for being supported by a receiving portion of a movable member provided in the main assembly when the engaging member is in the main assembly; a first guide provided on an upper portion of the frame; a second guide provided on a lower portion of the frame; a third guiding portion provided on a lower portion the frame; a driving force receiving member provided at a downstream end portion and receiving a driving force from a driving force transmitting member provided in the main assembly; and a positioning portion projected from the frame toward an upstream side in the inserting direction, and disposed coaxially with the drum, and wherein when the engaging member supported by the rec

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 developing roller for developing an electrostatic latent image formed on the photosensitive drum; a magnet disposed inn the developing roller; a drum frame supporting the photosensitive drum; a developing device frame supporting the developing roller and the magnet; an engaging member mounted to one longitudinal end of the developing device frame in engagement with one end of the developing roller and with one end of the magnet, the engaging member is provided with a projected portion at an opposite end from the end where it is in engagement with one end of the developing roller and one end of the magnet; an elastic member urging the projected portion by its elastic force so as to urge the developing roller to the photosensitive drum.

Abstract: A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, includes an electrophotographic photosensitive drum: a developing member for developing an electrostatic latent image formed on the electrophotographic photosensitive drum with a developer: charging member for electrically charging the drum: a drum frame supporting the charging member and the drum: a developer accommodation frame having a developer accommodating portion for accommodating the developer: a supporttng frame supporting the drum frame and the developer accommodation frame adjacent one longitudinal end of the drum; a developing bias contact, provided on the supporting frame, for receiving a developing bias voltage applied to the developing member from the main assembly of the apparatus when the process cartridge is mounted to the main assembly of the apparatus: and a charging bias contact, provided on the supporting frame, for receiving a charging bias applied to the charging member from t

Abstract: A remanufacturing method for a process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, includes (a) an end cover removing step of cutting a fixing portion between the second end cover and the drum frame and cutting a fixing portion between the second end cover and the developer frame, and removing the second end cover at the other longitudinal ends of the drum frame, the developing frame and the developer frame; (b) a drum shaft removing step of removing, at the other ends, a drum shaft rotatably supporting the electrophotographic photosensitive drum at the other ends; (c) a roller separating step of applying forced to the drum frame, the developing frame and the developer frame in directions crossing with a longitudinal direction of electrophotographic photosensitive drum so as to separate the electrophotographic photosensitive drum and the developing roller from each other; (d) a drum removing step of moving the electrophotographic photosensitive drum out

Abstract: A remanufacturing method for a process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, includes an end cover removing step of cutting a fixing portion between the first end cover and the drum frame and cutting a fixing portion between the first end cover and the developer frame, and removing the first end cover at the other longitudinal ends of the drum frame, the developing frame and the developer frame; an end cover removing step of cutting a fixing portion between the second end cover and the drum frame and cutting a fixing portion between the second end cover and the developer frame, and removing the second end cover at the other longitudinal ends of the drum frame, the developing frame and the developer frame; a drum frame separating step of pulling, after the developer frame is removed, a pin provided in the one longitudinal end of the drum frame out of the drum frame, and removing a spring mounted between one longitudinal end of the drum frame and on

Abstract: A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, the process cartridge includes a cartridge frame; an electrophotographic photosensitve drum; a charger for charging the drum; a developing member for developing an latent image on the drum; a developer accommodating portion to be used the developing member; an engaging member for being supported by a receiving portion of a movable member provided in the main assembly when the engaging member is in the main assembly, wherein the engaging member is provided on-a portion of the cartrige frame which takes an upper position when the cartridge is inserted into the main assembly in a longitudinal direction thereof, at a downstream end positionin a direction of insertion of the cartridge into the main assembly; a first guide provided on an upper portion of the frame, at such a position as takes a downstream position, wherein the first guide is guided by a fixed guide provided in the main assembly; a second g

Abstract: A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus includes an electrophotographic photosensitive member; a developing member for developing an electrostatic latent image formed on the electrophotographic photosensitive member; a developer accommodating portion for accommodating a developer to be used by the developing member to develop the electrostatic latent image; a cartridge guide for being guided by a main assembly side guide provided in the main assembly of the apparatus; a first cartridge positioning portion; provided at one end portion in an axial direction of the electrophotographic photosensitive member, for engagement with a first main assembly side positioning portion, provided in the main assembly of the apparatus, in response to falling of a side of the process cartridge opposite from a side having the developer accommodating portion in the direction crossing with the axial direction of the electrophotographic photosensitive member by o

Abstract: A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus includes an electrophotographic photosensitive member; a developing member for developing an electrostatic latent image formed on the electrophotographic photosensitive member; a developer accommodating portion for accommodating a developer to be usage by the developing number to develop the electrostatic latent image; a cartridge guide for being guided by a main assembly side guide provided in the main assembly of the apparatus; a first cartridge positioning portion; provided at one end portion in an axial direction of the electrophotographic photosensitive member, for engagement with a first main assembly side positioning portion, provided in the main assembly of the apparatus, in response to falling of a side of the process cartridge opposite from a side having the developer accommodating portion in the direction crossing with the axial direction of the electrophotographic photosensitive member by

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 developing roller for developing an electrostatic latent image formed on the photosensitive drum; a magnet disposed inn the developing roller; a drum frame supporting the photosensitive drum; a developing device frame supporting the developing roller and the magnet; an engaging member mounted to one longitudinal end of the developing device frame in engagement with one end of the developing roller and with one end of the magnet, the engaging member is provided with a projected portion at an opposite end from the end where it is in engagement with one end of the developing roller and one end of the magnet; an elastic member urging the projected portion by its elastic force so as to urge the developing roller to the photosensitive drum.

Abstract: An electrophotographic photosensitive drum for use in a main body of an electrophotographic image forming apparatus, includes a cylinder having a photosensitive member on the periphery, a first helical gear provided at one end of the cylinder, and a second helical gear provided at the other end of the cylinder and having the same hand helix as the first helical gear and a number of teeth less than that of the first helical gear.