Abstract: A process cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus. The cartridge includes a drum, first and second guidable portions guidable by first and second guides when the cartridge enters or advances in the main assembly, first and second regulatable portions provided at leading and trailing sides of the cartridge with respect to the advancing direction and regulated by a first main assembly regulator when the process is advancing in the main assembly, and first and second positionable portions to be positioned at first and main assembly second positioners, respectively, by the urging force of a main assembly urging member after the first and second regulatable portions pass the first and second regulators, respectively. The cartridge is mounted to the main assembly with the first and second positionable portions at the first and second positioners, respectively, by the urging force of the urging member.

Abstract: A process cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus. The cartridge includes a drum, first and second guidable portions guidable by first and second guides when the cartridge enters or advances in the main assembly, first and second regulatable portions provided at leading and trailing sides of the cartridge with respect to the advancing direction and regulated by a first main assembly regulator when the process is advancing in the main assembly, and first and second positionable portions to be positioned at first and main assembly second positioners, respectively, by the urging force of a main assembly urging member after the first and second regulatable portions pass the first and second regulators, respectively. The cartridge is mounted to the main assembly with the first and second positionable portions at the first and second positioners, respectively, by the urging force of the urging member.

Abstract: A process cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus. The cartridge includes a drum, first and second guidable portions guidable by first and second guides when the cartridge enters or advances in the main assembly, first and second regulatable portions provided at leading and trailing sides of the cartridge with respect to the advancing direction and regulated by a first main assembly regulator when the process is advancing in the main assembly, and first and second positionable portions to be positioned at first and main assembly second positioners, respectively, by the urging force of a main assembly urging member after the first and second regulatable portions pass the first and second regulators, respectively. The cartridge is mounted to the main assembly with the first and second positionable portions at the first and second positioners, respectively, by the urging force of the urging member.

Abstract: A process cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus. The cartridge includes a drum, first and second guidable portions guidable by first and second guides when the cartridge enters or advances in the main assembly, first and second regulatable portions provided at leading and trailing sides of the cartridge with respect to the advancing direction and regulated by a first main assembly regulator when the process is advancing in the main assembly, and first and second positionable portions to be positioned at first and main assembly second positioners, respectively, by the urging force of a main assembly urging member after the first and second regulatable portions pass the first and second regulators, respectively. The cartridge is mounted to the main assembly with the first and second positionable portions at the first and second positioners, respectively, by the urging force of the urging member.

Abstract: A process cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus. The process cartridge comprises an electrophotographic photosensitive drum, process means actable on said electrophotographic photosensitive drum, a first cartridge side portion-to-be-guided, a second cartridge side portion-to-be-guided, a first cartridge side portion-to-be-regulated, a second cartridge side portion-to-be-regulated, a first cartridge side portion to be positioned, and a second cartridge side portion to be positioned. The process cartridge is mounted to a main assembly with a first cartridge side portion to be positioned at a first main assembly side positioning portion by the urging force of an urging member and with the second cartridge side portion to be positioned at a second main assembly side positioning portion by the urging force of the urging member.

Abstract: A process cartridge is provided that is detachably mountable to a main assembly of an electrophotographic image forming apparatus. The process cartridge includes an electrophotographic photosensitive drum and a developing unit. The process cartridge further includes a portion to be positioned, first and second displacing portions, and a portion to be urged. The process cartridge also includes a pull-up force receiving portion, disposed at a trailing side of the cartridge, for being urged by a pull-up force of a pull-up member.

Abstract: A process cartridge is provided that is detachably mountable to a main assembly of an electrophotographic image forming apparatus. The process cartridge includes an electrophotographic photosensitive drum and a developing unit. The process cartridge further includes a portion to be positioned, a displacing portion, and a portion to be urged. The portion to be positioned is positioned to a main assembly side positioning portion by the portion to be urged when the process cartridge is set in the main assembly.

Abstract: A process cartridge is provided that is detachably mountable to a main assembly of an electrophotographic image forming apparatus. The process cartridge includes an electrophotographic photosensitive drum and a developing unit. The process cartridge further includes a portion to be positioned, first and second displacing portions, and a portion to be urged. The process cartridge also includes a pull-up force receiving portion, disposed at a trailing side of the cartridge, for being urged by a pull-up force of a pull-up member.

Abstract: A process cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus. The process cartridge comprises an electrophotographic photosensitive drum, process means actable on said electrophotographic photosensitive drum, a first cartridge side portion-to-be-guided, a second cartridge side portion-to-be-guided, a first cartridge side portion-to-be-regulated, a second cartridge side portion-to-be-regulated, a first cartridge side portion to be positioned, and a second cartridge side portion to be positioned. The process cartridge is mounted to a main assembly with a first cartridge side portion to be positioned at a first main assembly side positioning portion by the urging force of an urging member and with the second cartridge side portion to be positioned at a second main assembly side positioning portion by the urging force of the urging member.

Abstract: A process cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus including a positioning portion, a rotatable urging member taking an urging position for urging the cartridge to the positioning portion, and retracted and stand-by positions. The cartridge includes an electrophotographic photosensitive drum, a process device actable on the drum, a positionable portion, a displacing portion moving the urging member from the stand-by to the retracted position by contacting a portion-to-be-displaced disposed at a position remoter from the rotation axis of the urging portion than the urging portion when the cartridge advances along an axial direction of the drum in the main assembly, the displacing portion moving the urging member to the retracted position by contacting the urging member when the cartridge advances in the main assembly, and an urgable portion urgable by the urging portion when the cartridge is set in the main assembly.

Abstract: A process cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus.

Abstract: A process cartridge and an image forming apparatus in which a charging roller is separated from a photosensitive drum by a predetermined distance and in which the separation between the charging roller and the photosensitive drum is released at the time of use without involving an increase in the burden on the user and erroneous releasing of the separation by user is prevented prior to use. The process cartridge, which is detachably mountable to the apparatus main body having an acting portion, includes a process cartridge frame, a locking portion locked with the frame to separate the charging roller from the photosensitive drum, a separation holding member having an acted portion which penetrates the frame and on which the acting portion can act, and a protruding portion provided on the frame and protruding beyond the acted portion at the position where the separation holding member is locked with the frame.

Abstract: A process cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus. The cartridge includes a drum, first and second guidable portions guidable by first and second guides when the cartridge enters or advances in the main assembly, first and second regulatable portions provided at leading and trailing sides of the cartridge with respect to the advancing direction and regulated by a first main assembly regulator when the process is advancing in the main assembly, first and second positionable portions to be positioned at first and main assembly second positioners, respectively, by the urging force of a main assembly urging member after the first and second regulatable portions pass the first and second regulators, respectively. The cartridge is mounted to the main assembly with the first and second positionable portions at the first and second positioners, respectively, by the urging force of the urging member.

Abstract: A member for performing separation holding of a developing roller of a process cartridge is provided at a position opposite from a photosensitive drum with respect to a swing center. A detachably mountable protective cover is mounted to the process cartridge and a projection of the protective cover is inserted between the photosensitive drum and a developing device frame which supports the developing roller. The projection of the protective cover is inserted in a non-contact state with the photosensitive drum and the developing device frame.

Abstract: A process cartridge is provided that is detachably mountable to a main assembly of an electrophotographic image forming apparatus. The process cartridge includes an electrophotographic photosensitive drum and a developing unit. The process cartridge further includes a portion to be positioned, first and second displacing portions, and a portion to be urged. The process cartridge also includes a pull-up force receiving portion, disposed at a trailing side of the cartridge, for being urged by a pull-up force of a pull-up member.

Abstract: A process cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus.

Abstract: A process cartridge is provided that is detachably mountable to a main assembly of an electrophotographic image forming apparatus. The process cartridge includes an electrophotographic photosensitive drum and a developing unit. The process cartridge further includes a portion to be positioned, a displacing portion, and a portion to be urged. The portion to be positioned is positioned to a main assembly side positioning portion by the portion to be urged when the process cartridge is set in the main assembly.

Abstract: A process cartridge is provided that is detachably mountable to a main assembly of an electrophotographic image forming apparatus. The process cartridge includes an electrophotographic photosensitive drum and a developing unit. The process cartridge further includes a portion to be positioned, first and second displacing portions, and a portion to be urged. The process cartridge also includes a pull-up force receiving portion, disposed at a trailing side of the cartridge, for being urged by a pull-up force of a pull-up member.

Abstract: A process cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus.

Abstract: A process cartridge includes a photosensitive drum, a photosensitive unit rotatably supporting the drum, and a protecting cover mountable to an electrophotographic image forming apparatus main body, for protecting the drum exposed to the outside of the photosensitive unit. The protecting cover includes a guide for guiding the cartridge to an inside of the main body along a longitudinal direction of the drum, a positioned portion at a leading end of the cover so as to be abutted against a positioning portion of the main body, for positioning the cover in a direction crossing the longitudinal direction, and an engaged portion at the leading end so as to be engaged with an engaging portion of the main body in the inserting direction, for regulating detachment of the protecting cover from the apparatus main body from an upstream side thereof in the insertion direction.