Patent ID: 6081676
Filing Date: 2000-06-27
Classification: G03G

Abstract:
An electrophotographic image forming apparatus for forming an image on a recording material, to which a process cartridge is detachably mountable, said apparatus comprising:a. a mounting member for detachably mounting a process cartridge, said process cartridge comprising:an electrophotographic photosensitive member; a cleaning member for removing toner remaining on said electrophotographic photosensitive member; a toner accommodating portion for accommodating toner removed from said electrophotographic photosensitive member by said cleaning member; a first light transmission member, provided in said toner accommodating portion, for directing light from outside into said toner accommodating portion; and a second light transmission member, provided in said toner accommodating portion, for directing the light directed into the toner accommodating portion through said first light transmission member, to an outside of said toner accommodating portion;wherein said mounting member is movable between an image forming position for forming an image and a mounting-and-demounting position for mounting or demounting said process cartridge;b. a light emission member for emitting the light;c. a light receiving member for receiving the light;d. a light guiding member, provided on said mounting member, for guiding the light having passed through said second light transmission member to said light receiving member;e. a feeding member for feeding the recording material.