Patent ID: 8185013

Claim:
An electrophotographic image forming apparatus for forming an, image on a recording material, comprising: an image forming unit including a transfer member for transferring a developed image formed on an electrophotographic photosensitive drum, and a mounting portion for demountably mounting a cartridge, said image forming unit being movable, in a state that said cartridge is demountably mounted to said mounting portion, between a transfer position for transferring the developed image from said transfer member onto the recording material in a main assembly of said electrophotographic image forming apparatus, and a mounting and demounting position, different from the transfer position, for mounting and demounting said cartridge relative to said mounting portion; and a regulating member for limiting movement, outward of said image forming unit, of said cartridge mounted to said mounting portion, when said image forming unit moves between the transfer position and the mounting and demounting position, said regulating member being movable between a regulating position for limiting movement, outward of said image forming unit, of said cartridge, and a permitting position for permitting mounting and demounting of said cartridge relative to said mounting portion, and said regulating member being in a regulating position when said image forming unit moves between the transfer position and the mounting and demounting position.