Patent ID: 9625838
Date: 2017-04-18
CPC Classifications: G03G

Claim:
1. An electrophotographic apparatus comprising: a cylindrical electrophotographic photosensitive member; a charging roller that is disposed so as to be in contact with the electrophotographic photosensitive member and applies a direct current voltage to charge the electrophotographic photosensitive member; a driving force transmission that transmits a driving force which causes rotation so that contact portions of the electrophotographic photosensitive member and the charging roller move in the same direction and a peripheral speed of the charging roller is higher than a peripheral speed of the electrophotographic photosensitive member; and a developing device that supplies a toner onto the electrophotographic photosensitive member to form a toner image, wherein the developing device is configured to collect a residual toner left on the electrophotographic photosensitive member after the toner image has been transferred onto a transfer material, the electrophotographic photosensitive member comprises a support, an undercoat layer on the support, and a photosensitive layer on the undercoat layer, the undercoat layer contains metal oxide particles, and a volume resistivity of the undercoat layer is from 1×10