Bilderzeugungsgerät.

摘要

An image forming apparatus usable with a process cartridge. Improved positioning mechanism between the process cartridge and the optical system of the main assembly of the image forming apparatus. The process cartridge and the optical system are freely movably supported in the main assembly, positioning portions of the process cartridge and the optical system are abutted to a positioning member fixed to the main assembly of the image forming apparatus. The process cartridge and the optical system are both carried by the part which opens upwardly in a bivalve type hinged opening construction.