Patent ID: 8687984

Claim:
An image forming apparatus, to which a plurality of cartridges are detachably mountable, the cartridges each having a cartridge side identification portion, said image forming apparatus comprising: an image forming unit configured to form an image; a plurality of mounting portions to which the cartridges are demountably mountable; and identification urging means, provided in each of said mounting portions and contacting the cartridge side identification portion, for permitting a cartridge to be mounted to said mounting portion at a mount position when the cartridge is to be properly mounted to said mounting portion on the basis of correspondence with the cartridge side identification portion, and for urging the cartridge in a direction opposite a direction in which the cartridge is mounted when the cartridge is improper for said mounting portion, wherein said identification urging means permits, even when the cartridge is improper for said mounting portion, the cartridge to enter to the mount position where the proper cartridge is mounted.