Patent ID: 7630661

Claim:
A process cartridge detachably mountable to a main assembly of an image forming apparatus, wherein the main assembly includes a motor, a driving rotatable member that receives a driving force from the motor, and a twisted hole having a non-circular cross section and substantially coaxial with the driving rotatable member, said process cartridge comprising: an electrophotographic photosensitive drum; a process means actable on said electrophotographic photosensitive drum; and a projection provided at a longitudinal end of said electrophotographic photosensitive drum, wherein when the driving rotatable member rotates with the hole and said projection engaged with each other in the state that said process cartridge is mounted to the main assembly of the apparatus, a rotational driving force is transmitted from the driving rotatable member to said electrophotographic photosensitive drum through engagement between the hole and said projection, and wherein said projection comprises an electroconductive material, electrically connected with said electrophotographic photosensitive drum, for electrical connection with a main assembly grounding contact provided in the hole to electrically ground said electrophotographic photosensitive drum when said process cartridge is mounted to the main assembly of the apparatus.