公开(公告)号：US20250110417A1

公开(公告)日：2025-04-03

申请号：US18893376

申请日：2024-09-23

Applicant: KYOCERA Document Solutions Inc.

Inventor： Tamotsu SHIMIZU ,  Akira MATAYOSHI ,  Norio KUBO ,  Asami SASAKI ,  Kazuaki FUJIWARA ,  Einosuke KIKUCHI

IPC: G03G9/093 ,  G03G5/082 ,  G03G9/113 ,  G03G15/08 ,  G03G15/16

Abstract: An image forming apparatus includes a two-component developer, a photosensitive member, a charging device, a development device and an intermediate transfer belt. The intermediate transfer belt contains a base resin and a conductive agent. The base resin includes a thermoplastic resin or a thermosetting resin. The photosensitive member includes a base member and an amorphous silicon photosensitive layer. The arithmetic average roughness Ra of the surface of the photosensitive member is equal to or greater than 37 nm but equal to or less than 105 nm. The toner particle includes a toner base particle and a toner external additive that is adhered to the surface of the toner base particle. The toner external additive includes a spacer particle. The number average primary particle diameter of the spacer particle is greater than the arithmetic average roughness Ra of the surface of the photosensitive member.

公开(公告)号：US20240069458A1

公开(公告)日：2024-02-29

申请号：US18458606

申请日：2023-08-30

Applicant: KYOCERA Document Solutions Inc.

Inventor： Asami SASAKI ,  Norio KUBO ,  Masashi FUJISHIMA ,  Kohei TERASAKI

IPC: G03G9/113 ,  G03G9/08 ,  G03G9/097 ,  G03G15/08

CPC classification number: G03G9/1139 ,  G03G9/0819 ,  G03G9/09725 ,  G03G9/1136 ,  G03G15/0894

Abstract: A developer set includes a first developer and a second developer. The first developer contains a first toner containing first toner particles and a first carrier containing first carrier particles. The second developer contains a second toner containing second toner particles and a second carrier containing second carrier particles. The first toner particles and the second toner particles each include a toner mother particle and external additive particles attached to the surface of the toner mother particle. The external additive particles include spacer particles. The spacer particles have a number average primary particle diameter of at least 32 nm and no greater than 145 nm. The first carrier particles each include a first carrier mother particle and strontium titanate particles attached to the surface of the first carrier mother particle.

公开(公告)号：US20230259060A1

公开(公告)日：2023-08-17

申请号：US18160379

申请日：2023-01-27

Applicant: KYOCERA Document Solutions Inc.

Inventor： Koji SUENAMI ,  Norio KUBO ,  Masashi FUJISHIMA

IPC: G03G15/00

CPC classification number: G03G15/5041 ,  G03G15/55 ,  G03G15/757

Abstract: An image forming apparatus includes: a gear that transmits a drive force, which is supplied from a drive unit, to a photosensitive drum; a formation processing unit that, at arrival of each of specific formation timings, uses the photosensitive drum thereby to form a to-be-detected toner image that is based on a to-be-detected image having a specific density; an acquisition processing unit that acquires a variation width of a density in the to-be-detected toner image formed by the formation processing unit; and a determination processing unit that determines a failure timing of the gear based on the variation width for each of the formation timings.