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US 10,663,913 B2Granted
Process cartridge and electrophotographic apparatus
AssigneeCanon Kabushiki Kaisha
InventorsTatsuya Yamaai, Kazunori Noguchi, Shuhei Iwasaki, Akira Sakakibara, Daisuke Miura, Harunobu Ogaki, Takumi Furukawa, Yuya Tomomizu
Life of this patent
Estimating the term…
Abstract
Provided is a process cartridge having a charging member and an electrophotographic photosensitive member to be charged by being in contact with the charging member, wherein the electrophotographic photosensitive member has a support and a photosensitive layer in this order, and a surface layer of the electrophotographic photosensitive member has a Martens hardness of 230 N/mm2 or less.
Claims14
A process cartridge, comprising:
- a charging member;
- and
- an electrophotographic photosensitive member configured to be charged by being in contact with the charging member, said electrophotographic photosensitive member comprising a support and a photosensitive layer in this order,
- the charging member having an electroconductive substrate and a conductive elastic layer as a surface layer,
- the elastic layer containing a binder and a bowl-shaped resin particle having an opening, the opening being exposed on a surface of the charging member,
- a surface of the elastic layer comprising a concave portion derived from the opening and a convex portion derived from an edge of the opening, wherein
- a surface layer of the electrophotographic photosensitive member contains a charge transport material and a polycarbonate resin having structures represented by formulae (I) and (II), where formula (I) is
- and formula (II) is at least one of formulae (II-1) to (II-5)
- and
- the surface layer of the electrophotographic photosensitive member has a Martens hardness of 230 N/mm2 or less.
7 more elements
A process cartridge, comprising:
- a charging member;
- and
- an electrophotographic photosensitive member configured to be charged by being in contact with the charging member, the electrophotographic photosensitive member comprising a support and a photosensitive layer in this order,
- the charging member having an electroconductive substrate and a conductive elastic layer as a surface layer,
- a surface of the elastic layer containing an insulating hollow particle and an insulating binder,
- the hollow particle forming a convex portion exposed on the surface of the elastic layer, the hollow particle having a recess at the apex part of the convex portion, wherein
- a surface layer of the electrophotographic photosensitive member contains a charge transport material and a polycarbonate resin having structures represented by formulae (I) and (II), where formula (I) is
- and formula (II) is at least one of formulae (II-1) to (II-5)
- and
- the surface layer of the electrophotographic photosensitive member has a Martens hardness of 230 N/mm2 or less.
7 more elements
An electrophotographic apparatus, comprising:
- at least one of a charging unit and an exposing unit;
- and
- a process cartridge, the process cartridge comprising a charging member and an electrophotographic photosensitive member configured to be charged by being in contact with the charging member, the electrophotographic photosensitive member comprising a support and a photosensitive layer in this order,
- the charging member having an electroconductive substrate, and a conductive elastic layer as a surface layer,
- the elastic layer containing a binder and a bowl-shaped resin particle having an opening, the opening being exposed on a surface of the charging member,
- a surface of the elastic layer comprising a concave portion derived from the opening and a convex portion derived from an edge of the opening, wherein
- a surface layer of the electrophotographic photosensitive member contains a charge transport material and a polycarbonate resin having structures represented by formulae (I) and (II), where formula (I) is
- and formula (II) is at least one of formulae (II-1) to (II-5)
- and
- the surface layer of the electrophotographic photosensitive member has a Martens hardness of 230 N/mm2 or less.
7 more elements
An electrophotographic apparatus, comprising:
- at least one of a charging unit and an exposing unit;
- and
- a process cartridge, the process cartridge comprising a charging member and an electrophotographic photosensitive member configured to be charged by being in contact with the charging member, the electrophotographic photosensitive member comprising a support and a photosensitive layer in this order,
- the charging member having an electroconductive substrate, and a conductive elastic layer as a surface layer,
- a surface of the elastic layer containing an insulating hollow particle and an insulating binder,
- the hollow particle forming a convex portion exposed on the surface of the elastic layer, the hollow particle having a recess at the apex part of the convex portion, wherein
- a surface layer of the electrophotographic photosensitive member contains a charge transport material and a polycarbonate resin having structures represented by formulae (I) and (II), where formula (I) is
- and formula (II) is at least one of formulae (II-1) to (II-5)
- and
- the surface layer of the electrophotographic photosensitive member has a Martens hardness of 230 N/mm2 or less.
7 more elements
Dependencies are inferred from the claim text.