Patent ID: 7088939

Claim:
A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, said process cartridge comprising: an electrophotographic photosensitive drum; a charging member configured and positioned to electrically charge said electrophotographic photosensitive drum, wherein said charging member is supplied with a charging bias voltage received from the main assembly of the electrophotographic image forming apparatus when said process cartridge is mounted to the main assembly of the electrophotographic image forming apparatus; and a charging-member rubbing member having an insulative property and contacting said charging member along a longitudinal direction of said charging member, wherein said charging member contacts said electrophotographic photosensitive drum within a longitudinally extending range to electrically charge said electrophotographic photosensitive drum, and wherein said charging-member rubbing member is disposed between an electroconductive member and said charging member beyond an end of said range to prevent leakage of current from said charging member to the electroconductive member when said charging member is supplied with the charging bias.