Patent ID: 6324365
Filing Date: 2001-11-27
Classification: G03G

Abstract:
A process cartridge comprising an electrophotographic photosensitive member having a support, a photosensitive layer containing an organic charge-generating material and an organic charge transporting material on the support, and a surface layer containing electroconductive particles on the photosensitive layer; and at least one of a charging member placed in contact with the electrophotographic photosensitive member for charging the electrophotographic member by application of a voltage, a development means, and a cleaning means integrated into one body, and being detached from the main body of an electrophotographic apparatus, wherein the electrophotographic photosensitive member has an electrostatic capacity of not less than 130 pF per cm.sup.2, and wherein a DC voltage (V.sub.DC) and an AC voltage are applied in superposition to the charging member, and the V.sub.DC, the peak-to-peak voltage (V.sub.pp) of the AC voltage, the surface potential (V.sub.D) of the photosensitive member immediately after the charging, and the discharge initiation voltage (V.sub.th) satisfy the equations below:.vertline.V.sub.DC -V.sub.D.vertline..ltoreq.200 (V).vertline.V.sub.pp.vertline.<2.times..vertline.V.sub.th.vertline..vertline.V.sub.pp /2.vertline.+.vertline.V.sub.DC.vertline.-.vertline.V.sub.D.vertline.< .vertline.V.sub.th.vertline..