Process cartridge, assembling method for process cartridge and electrophotographic image forming apparatus

摘要

A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, includes a cartridge frame; an electrophotographic photosensitive drum (7) having a cylinder (7a) and a photosensitive layer thereon; process means actable on said photosensitive drum; a drum shaft (30) for rotatably supporting said photosensitive drum (7) on said cartridge frame, said drum shaft (30) extending through said photosensitive drum (7) and having a length enough to be supported by said cartridge frame at one end thereof and at the other end thereof; a preventing member for preventing said drum shaft from disengaging from said cartridge frame.