公开(公告)号：US12032318B2

公开(公告)日：2024-07-09

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 ,  G03G5/06 ,  G03G5/07 ,  G03G5/147 ,  G03G8/00 ,  G03G21/00

CPC classification number: G03G15/6597 ,  G03G5/06147 ,  G03G5/061473 ,  G03G5/0732 ,  G03G5/14786 ,  G03G5/14791 ,  G03G5/14795 ,  G03G8/00 ,  G03G15/751 ,  G03G21/0011 ,  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°.

公开(公告)号：US20240004323A1

公开(公告)日：2024-01-04

申请号：US18337788

申请日：2023-06-20

Applicant: Konica Minolta, Inc.

Inventor： Toshiyuki FUJITA ,  Kazukuni Nishimura

IPC: G03G8/00 ,  G03G15/02 ,  G03G15/16 ,  G03G7/00

CPC classification number: G03G8/00 ,  G03G15/0216 ,  G03G15/162 ,  G03G7/0046 ,  G03G7/0013

Abstract: Provided is an electrophotographic photoreceptor capable of reducing the rotational torque of the photoreceptor and also reducing the increase in the rotational torque during long-term use when a cured layer obtained by curing a charge transporting compound having a radically polymerizable group is used as a protective layer. In the electrophotographic photoreceptor, a conductive support, a photosensitive layer, and a protective layer are laminated in this order. The protective layer is formed of a cured product of a composition containing the following: a charge transporting compound having a radically polymerizable functional group; and metal oxide particles surface-treated with a surface treating agent having a silicone chain in a side chain thereof.