公开(公告)号：US20230324818A1

公开(公告)日：2023-10-12

申请号：US18193727

申请日：2023-03-31

Applicant: Konica Minolta, Inc.

Inventor： Kazukuni NISHIMURA ,  Toshiyuki FUJITA ,  Hiroki TAKAO ,  Seijiro TAKAHASHI ,  Tomoko SAKIMURA

IPC: G03G5/147 ,  G03G15/00 ,  G03G5/047 ,  G03G5/05 ,  G03G5/06

CPC classification number: G03G5/14708 ,  G03G15/75 ,  G03G5/14704 ,  G03G5/047 ,  G03G5/0564 ,  G03G5/06142

Abstract: Provided is an electrophotographic photoreceptor having at least a charge transport layer and a protective layer sequentially laminated on a conductive support, wherein the protective layer contains a cured product of a composition containing a charge transport compound having a chain polymerizable functional group; the charge transport layer and the protective layer are continuously laminated with intervening a mixed layer therebetween in which components of both layers of the charge transport layer and the protective layer are compatible; and the mixed layer has a thickness in the range of 0.1 to 1.0 μm.

公开(公告)号：US20240160120A1

公开(公告)日：2024-05-16

申请号：US18475625

申请日：2023-09-27

Applicant: Konica Minolta, Inc.

Inventor： Takeshi ISHIDA ,  Akihiko ITAMI ,  Toshiyuki FUJITA ,  Kazukuni NISHIMURA

IPC: G03G5/147 ,  G03G5/047 ,  G03G5/06 ,  G03G21/16

CPC classification number: G03G5/14786 ,  G03G5/047 ,  G03G5/0696 ,  G03G5/14704 ,  G03G21/1661

Abstract: An electrophotographic photoreceptor includes a photosensitive layer on a support, wherein the photosensitive layer includes at least a charge generating layer, a charge transporting layer, and a protective layer, the charge generating layer contains titanyl phthalocyanine or a derivative thereof, the charge transporting layer contains a charge transporting material, the protective layer contains a reactant of a polymerizable monomer having a charge transporting structure and a polymerizable monomer having no charge transporting structure, and the charge transporting material, and a ratio of the mass of the charge transporting material contained in the protective layer is greater than 3% by mass and less than 9% by mass with respect to the total mass of a reactant of the polymerizable monomer having the charge transporting structure and the polymerizable monomer having no charge transporting structure, and the charge transporting material.

公开(公告)号：US20230185227A1

公开(公告)日：2023-06-15

申请号：US18064490

申请日：2022-12-12

Applicant: KONICA MINOLTA, INC.

Inventor： Taiki AMEMIYA ,  Kazutoshi KOBAYASHI ,  Yukio HOSOYA ,  Seijiro TAKAHASHI ,  Tomoko SAKIMURA ,  Kazukuni NISHIMURA

IPC: G03G15/00 ,  G03G21/00 ,  G03G8/00

CPC classification number: G03G15/6597 ,  G03G21/0011 ,  G03G8/00 ,  G03G2215/00518

Abstract: An electrophotographic image forming system forms an electrostatic latent image on at least a photoreceptor, develops an image using an electrostatic charge image developing toner, and removes the toner using a cleaning blade. A tip ridge of the cleaning blade is pressed against a surface of the photoreceptor. The system includes a photosensitive layer of the photoreceptor and a surface protecting layer that is provided on a surface of the photosensitive layer. The surface protecting layer includes a polymerizable monomer having at least two polymerizable groups in a molecule and a polymer of a hole transporting compound having a polymerizable group represented by General formula (1). The tip ridge of the cleaning blade has an edge angle that is obtuse and less than 120° and is pressed against the surface of the photoreceptor at an effective contact angle that is in a range of 8 to 20°.