Patent ID: 7565094

Claim:
A process cartridge comprising: a photosensitive member cartridge including a first sidewall including a protection portion; a second sidewall; a photosensitive member disposed between the first sidewall and the second sidewall; and a lock device disposed on the first sidewall and configured to be moved between an unlocked position and a locked position; a developer cartridge configured to be received in and removed from the photosensitive member cartridge, the developer cartridge including a developing roller configured to face the photosensitive member when the developer cartridge is received in the photosensitive member cartridge; an inlet; a covering element configured to seal the inlet; and a developer containing chamber configured to contain developer, the developing containing chamber communicating with the inlet, wherein the protection portion at least partially overlaps the covering element, viewed in a direction in which the photosensitive member extends, when the developer cartridge is received in the photosensitive member cartridge.