Abstract: A drum unit detachably mountable to a main assembly of an electrophotographic image forming apparatus includes a photosensitive drum and a coupling member provided on the photosensitive drum. The coupling member includes a driving force receiving portion and a supporting portion movably supporting the driving force receiving portion. The supporting portion includes a first extended portion and a second extended portion which extend at least in an axial direction of the photosensitive drum.

Abstract: A process cartridge mountable in and dismountable from an image forming apparatus includes a frame, a storing portion provided on a mounting surface of the frame and configured to store information on the process cartridge, a projection projecting outwardly of the mounting surface in a direction normal to the mounting surface, and an electrical contact portion mounted on the projection and electrically connected to the storing portion.

Abstract: A drum unit detachably mountable to a main assembly of an electrophotographic image forming apparatus includes a photosensitive drum and a coupling member provided on the photosensitive drum. The coupling member includes a driving force receiving portion and a supporting portion movably supporting the driving force receiving portion. The supporting portion includes a first extended portion and a second extended portion which extend at least in an axial direction of the photosensitive drum.

Abstract: A drum unit detachably mountable to a main assembly of an electrophotographic image forming apparatus includes a photosensitive drum and a coupling member provided on the photosensitive drum. The coupling member includes a driving force receiving portion and a supporting portion movably supporting the driving force receiving portion. The supporting portion includes a first extended portion and a second extended portion which extend at least in an axial direction of the photosensitive drum.

Abstract: A process cartridge mountable in and dismountable from an image forming apparatus includes a frame, a storing portion provided on a mounting surface of the frame and configured to store information on the process cartridge, a projection projecting outwardly of the mounting surface in a direction normal to the mounting surface, and an electrical contact portion mounted on the projection and electrically connected to the storing portion.

Abstract: A process cartridge mountable in and dismountable from an image forming apparatus includes a frame, a storing portion provided on a mounting surface of the frame and configured to store information on the process cartridge, a projection projecting outwardly of the mounting surface in a direction normal to the mounting surface, and an electrical contact portion mounted on the projection and electrically connected to the storing portion.

Abstract: A drum unit detachably mountable to a main assembly of an electrophotographic image forming apparatus includes a photosensitive drum and a coupling member provided on the photosensitive drum. The coupling member includes a driving force receiving portion and a supporting portion movably supporting the driving force receiving portion. The supporting portion includes a first extended portion and a second extended portion which extend at least in an axial direction of the photosensitive drum.

Abstract: A process cartridge mountable in and dismountable from an image forming apparatus includes a frame, a storing portion provided on a mounting surface of the frame and configured to store information on the process cartridge, a projection projecting outwardly of the mounting surface in a direction normal to the mounting surface, and an electrical contact portion mounted on the projection and electrically connected to the storing portion.

Abstract: A drum unit detachably mountable to a main assembly of an electrophotographic image forming apparatus includes a photosensitive drum and a coupling member provided on the photosensitive drum. The coupling member includes a driving force receiving portion and a supporting portion movably supporting the driving force receiving portion. The supporting portion includes a first extended portion and a second extended portion which extend at least in an axial direction of the photosensitive drum.

Abstract: A drum unit detachably mountable to a main assembly of an electrophotographic image forming apparatus includes a photosensitive drum and a coupling member provided on the photosensitive drum. The coupling member includes a driving force receiving portion and a supporting portion movably supporting the driving force receiving portion. The supporting portion includes a first extended portion and a second extended portion which extend at least in an axial direction of the photosensitive drum.

Abstract: A developing apparatus usable with an electrophotographic image forming apparatus for forming an image on a recording material, includes a developer carrying member for developing a latent image formed on an electrophotographic photosensitive member with a developer; a first frame for accommodating the developer, the first frame including a first opening for supplying the developer and a first connecting portion provided around first opening; a second frame containing the developer carrying member, a second opening for receiving supply of the developer from the first opening and a second connecting portion provided around the second opening; an elastomer for connecting the first connecting portion and the second connecting portion with each other with the first opening and the second opening being opposed to each other so as to permit movement of the first frame and the second frame and so as to prevent the developer from leaking between the first connecting portion and the second connecting portion.

Abstract: A developing apparatus usable with an electrophotographic image forming apparatus for forming an image on a recording material, includes a developer carrying member for developing a latent image formed on an electrophotographic photosensitive member with a developer; a first frame for accommodating the developer, the first frame including a first opening for supplying the developer and a first connecting portion provided around first opening; a second frame containing the developer carrying member, a second opening for receiving supply of the developer from the first opening and a second connecting portion provided around the second opening; an elastomer for connecting the first connecting portion and the second connecting portion with each other with the first opening and the second opening being opposed to each other so as to permit movement of the first frame and the second frame and so as to prevent the developer from leaking between the first connecting portion and the second connecting portion.

Abstract: An electrophotographic image forming apparatus on which a process cartridge is detachably mountable forms an image on a recording medium, and has a main body electrical contact electrically connected to a cartridge electrical contact when the cartridge is mounted on an apparatus main body, an electrically grounded electrically conductive discharge preventing member for effecting discharge between it and a charged foreign substance to thereby prevent discharge from occurring between the foreign substance and the main body electrical contact when the foreign substance has entered the apparatus main body on which the process cartridge is not mounted. The discharge preventing member is movable between a first position located in the entry route of the cartridge and a second position retracted from the first position and located outside the entry route. The apparatus also has an actuating member for moving the discharge preventing member from the first to the second position.

Abstract: A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus includes an electrophotographic photosensitive drum, a process device actable on the drum, and a movable operation member. After the cartridge is mounted to the main assembly of the apparatus, the movable operation member is displaced by a driving force transmitted from the main assembly of the apparatus to the cartridge, so that the movable operation member is engaged with a displaceable member provided in the main assembly to move the displaceable member, in interrelation with which an output contact of the apparatus is moved from a retracted to an electrical connection position against an elastic force of an elastic function member. In addition, the cartridge includes an input electrical contact for receiving a voltage for enabling the process device means by engagement with the output contact moved to the electrical connection position.

Abstract: An electrophotographic image forming apparatus to which a cartridge is detachably mountable for forming an image on a recording medium. The apparatus includes a main body electrical contact member having a main body electrical contact electrically connected to a cartridge electrical contact to supply electric power to an electric power supplied member of the cartridge when the cartridge is mounted on the apparatus main body. The main body electrical contact is movable relative to the apparatus main body. The apparatus also includes an electrical contact cover member having an exposed portion for exposing the main body electrical contact, and covering the main body electrical contact member, and attached to the main body electrical contact member so that the exposed portion is movable relative to the main body electrical contact member. The electrical contact cover member is moved so that the two contacts are electrically connected together in the exposed portion.

Abstract: An electrophotographic image forming apparatus to which a cartridge is detachably mountable for forming an image on a recording medium, having a main body electrical contact member having a main body electrical contact electrically connected to a cartridge electrical contact of the cartridge in order to supply electric power to an electric power supplied member of the cartridge when the cartridge is mounted on the apparatus main body, the main body electrical contact being movable relative to the apparatus main body, and an electrical contact cover member having an exposed portion for exposing the main body electrical contact, and covering the main body electrical contact member, and attached to the main body electrical contact member so that the exposed portion is movable relative to the main body electrical contact member, wherein in operative association with the operation of mounting the cartridge on the apparatus main body, the electrical contact cover member is moved relative to the main body electrical

Abstract: A process cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus. The main assembly includes an output contact movable between electrical connecting and retracting positions, a displaceable member for moving the output contact, and an elastic member for elastically urging the displaceable member to urge the output contact toward the retracted position. The process cartridge includes a drum, a process device actable on the drum, an operating member, a movable operation member operable by the operating member, after mounting the cartridge to the main assembly, to move the displaceable member, in interrelation with which the output contact is moved from the retracted to the electrical connection position against an elastic force of the elastic member, and an input electrical contact for receiving a voltage enabling the process device by engagement with the output contact moved to the electrical connecting position.

Abstract: An electrophotographic image forming apparatus on which a process cartridge is detachably mountable forms an image on a recording medium, and has a main body electrical contact electrically connected to a cartridge electrical contact when the cartridge is mounted on an apparatus main body, an electrically grounded electrically conductive discharge preventing member for effecting discharge between it and a charged foreign substance to thereby prevent discharge from occurring between the foreign substance and the main body electrical contact when the foreign substance has entered the apparatus main body on which the process cartridge is not mounted. The discharge preventing member is movable between a first position located in the entry route of the cartridge and a second position retracted from the first position and located outside the entry route. The apparatus also has an actuating member for moving the discharge preventing member from the first to the second position.

Abstract: An electrophotographic image forming apparatus to which a cartridge is detachably mountable for forming an image on a recording medium, having a main body electrical contact member having a main body electrical contact electrically connected to a cartridge electrical contact of the cartridge in order to supply electric power to an electric power supplied member of the cartridge when the cartridge is mounted on the apparatus main body, the main body electrical contact being movable relative to the apparatus main body, and an electrical contact cover member having an exposed portion for exposing the main body electrical contact, and covering the main body electrical contact member, and attached to the main body electrical contact member so that the exposed portion is movable relative to the main body electrical contact member, wherein in operative association with the operation of mounting the cartridge on the apparatus main body, the electrical contact cover member is moved relative to the main body electrical

Abstract: A process cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus. The main assembly includes an output contact movable between electrical connecting and retracting positions, a displaceable member for moving the output contact, and an elastic member for elastically urging the displaceable member to urge the output contact toward the retracted position. The process cartridge includes a drum, a process device actable on the drum, an operating member, a movable operation member operable by the operating member, after mounting the cartridge to the main assembly, to move the displaceable member, in interrelation with which the output contact is moved from the retracted to the electrical connection position against an elastic force of the elastic member, and an input electrical contact for receiving a voltage enabling the process device by engagement with the output contact moved to the electrical connecting position.