Electrophotographic photosensitive member, and process cartridge and electrophotographic apparatus employing the same
AssigneeCanon Kabushiki Kaisha
InventorsToshiyuki Yoshihara, Hideki Anayama, Itaru Yamazaki, Hideyuki Ainoya, Hidetoshi Hirano
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Abstract
An electrophotographic photosensitive member is disclosed which has an electroconductive support and a photosensitive layer formed thereon. The photosensitive member is electrified by applying voltage to an electrification means brought into contact therewith, and it has higher impedance (.OMEGA..cndot.cm) at an end portion than at other portion of the area where the photosensitive member is allowed to contact with the electrification means. Also, a process cartridge and an electrophotographic apparatus using the photosensitive member are disclosed.
Claims21
An electrophotographic photosensitive member comprising an electroconductive support, and a photosensitive layer formed thereon, the electrophotographic photosensitive member including a photosensitive member having a protecting layer on said photosensitive layer and being electrified by applying voltage to an electrification means brought into contact therewith, wherein the photosensitive member has higher impedance (.OMEGA..cndot.cm) at an end portion including the photosensitive layer than at other portion of the area where the photosensitive member is allowed to contact with the electrification means, wherein said higher impedance does not result from material being in contact with the outer surface of said photosensitive layer.
A process cartridge comprising an electrophotographic photosensitive member, a contact electrification means having an electrification member, and at least one means selected from the group of a developing means, and a cleaning means:
- said electrophotographic photosensitive member comprising an electroconductive support and a photosensitive layer formed thereon, the electrophotographic photosensitive member being electrified by applying voltage to an electrification means brought into contact therewith, wherein the photosensitive member has higher impedance (.OMEGA..cndot.cm) at an end portion including the photosensitive layer than at other portion of the area where the photosensitive member is allowed to contact with the electrification means;
- and said electrophotographic photosensitive member and said at least one means being integrated into one body so as to be demountable from the main body of an electrophotographic apparatus.
An electrophotographic apparatus comprising an electrophotographic photosensitive member having a photosensitive layer formed on an electroconductive support, an electrification means having an electrifying member in contact with the electrophotographic photosensitive member for electrifying the electrophotographic photosensitive member on application of voltage, an imagewise exposure means, a developing means, and an image transfer means, wherein the photosensitive member has higher impedance (.OMEGA..cndot.cm) at an end portion including the photosensitive layer than at other portion of the area where the photosensitive member is allowed to contact with the electrification means.
Dependencies are inferred from the claim text.