Title: Developing cartridge and electrophotographic image forming apparatus
Application Number: 98117410 Application Date: 1998.07.03
Publication Number: 1210285 Publication Date: 1999.03.10
Approval Pub. Date: 2003.11.05 Granted Pub. Date: 2003.11.05
International Classifi-cation: G03G15/08
Applicant(s) Name: Canon K. K. Address:
Inventor(s) Name: Yokomori Hikto;Kanno Ichiroo;Kawai Taitoo
Attorney & Agent: yi yongmei
Abstract:
    The present invention relates to a developing cartridge which is detachably mountable to a main assembly of an electrophotographic image forming apparatus, the developing cartridge includes a cartridge frame; a developing member; the driving force receiving member for receiving driving force being exposed from a portion of the cartridge adjacent one longitudinal end of the developing member; a developing bias contact for receiving a developing bias; a toner accommodating portion; a first light-transmissive member and a second light-transmissive member, provided at a portion of the cartridge frame corresponding to the toner accommodating portion adjacent the other longitudinal end of the developing member, for detecting that remaining amount of the toner accommodated in the toner accommodating portion becomes smaller than a predetermined amount, wherein the first light-transmissive member is effective to introduce light emitted from the main assembly into the toner accommodating portion, and the second light-transmissive member is effective to direct the light having passed through the toner accommodating portion toward the main assembly.
Time: 5