Patent ID: 7844198

Claim:
A process cartridge having a cartridge case, comprising: an electrophotographic photoreceptor including: a cylindrical photoreceptor pipe; at least one flange which is attached to an opening of one end of the photoreceptor pipe, and which is provided with a shaft part projecting outward from the one end at a shaft center position of the photoreceptor pipe; and an earth member which is arranged to penetrate through the shaft part of the at least one flange, and which is provided on its inward side with at least one first contact part which contacts an inner circumference of the photoreceptor pipe, and on its outward side with a second contact part; an electrical conduction member which is attached to the cartridge case and is supported thereby; and at least one of a charging device which is configured to charge a surface of the electrophotographic photoreceptor evenly, a developing device which is configured to develop an electrostatic latent image on the electrophotographic photoreceptor, and a cleaning device which is configured to clean the surface of the electrophotographic photoreceptor, wherein the electrophotographic photoreceptor is supported by the cartridge case at least at the shaft part of the at least one flange through a bearing, and the electrical conduction member attached to the cartridge case is brought into contact with the second contact part of the electrophotographic photoreceptor, and wherein the process cartridge is detachable to an imaging device main body.