Patent ID: 7403733
Filing Date: 2008-07-22
Classification: F16D,G03G

Abstract:
1. A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, wherein the main assembly includes a motor, a main assembly gear configured and positioned to receive a driving force from the motor and, a twisted hole having a non-circular cross-section and being substantially coaxial with the gear, said process cartridge comprising: an electrophotographic photosensitive drum; process means actable on said photosensitive drum; and a non-twisted projection which is provided at a longitudinal end of said photosensitive drum and which has a base portion having a non-circular cross-section, said non-twisted projection being engageable with the hole at the base portion, wherein when the main assembly gear rotates with the hole and said projection engaged with each other, a rotational driving force is transmitted from the gear to said photosensitive drum through engagement between the hole and the base portion.