公开(公告)号：US20240069469A1

公开(公告)日：2024-02-29

申请号：US18455662

申请日：2023-08-25

Applicant: KYOCERA Document Solutions Inc.

Inventor： Masashi FUJISHIMA ,  Tamotsu SHIMIZU ,  Asami SASAKI ,  Eriko TAKEUCHI

IPC: G03G15/08 ,  G03G9/08 ,  G03G9/113 ,  G03G15/09

CPC classification number: G03G15/0891 ,  G03G9/0823 ,  G03G9/1139 ,  G03G15/0898 ,  G03G15/0907 ,  G03G15/0848 ,  G03G2215/0619 ,  G03G2215/0634

Abstract: An image forming apparatus includes a developer, a development device, and an image bearing member. The developer includes an initial developer containing an initial carrier and a replenishment developer containing a replenishment carrier. The initial carrier has a surface roughness Sa1 of at least 0.3 μm and no greater than 1.0 μm. A ratio Sa1/Sa2 of the surface roughness Sa1 of the initial carrier to a surface roughness Sa2 of the replenishment carrier is at least 1.2 and no greater than 3.4. The packing volume Vp calculated from equation (1)“Vp=100×Y/(Z×DS)” was at least 40% and no greater than 70%. In equation (1), Y represents an amount of the developer conveyed by a developer bearing member. Z represents an apparent density of the initial developer. DS represents a width of a space between the developer bearing member and the image bearing member.

公开(公告)号：US20160077464A1

公开(公告)日：2016-03-17

申请号：US14838359

申请日：2015-08-27

Applicant: KYOCERA Document Solutions Inc.

Inventor： Asami SASAKI ,  Masaru HATANO ,  Norio KUBO

IPC: G03G15/08

CPC classification number: G03G15/0896 ,  G03G15/0818 ,  G03G15/0865 ,  G03G21/0052 ,  G03G21/206

Abstract: A developing device includes a developing container, a toner carrier, and a plurality of air outlet ports. The plurality of air outlet ports are formed in such part of a wall of the developing container as faces the toner carrier, along a longitudinal direction of the developing container, the air outlet ports communicating with a duct next to the developing container. The toner carrier includes a coat layer on the outer circumferential surface thereof. The coat layer is formed by dripping the toner carrier into a resin coating liquid with one end in the longitudinal direction thereof first, the one end being a lower end of during the dipping, and then lifting the toner carrier out of the resin coating liquid. The toner carrier is arranged such that the lower end of during the dipping is disposed on an upstream side with respect to an airflow direction in the duct.

Abstract translation: 显影装置包括显影容器，调色剂载体和多个空气出口。 多个空气出口端口沿显影容器的纵向方向形成在显影容器的壁的与调色剂载体相对面的一部分中，空气出口与与显影容器相邻的管道连通。 调色剂载体在其外圆周表面上包括涂层。 涂层通过将调色剂载体滴落到树脂涂布液中而形成，其一端沿其长度方向一端，一端为浸渍时的下端，然后将调色剂载体从树脂涂布液中提出。 调色剂载体布置成使得浸渍期间的下端相对于管道中的气流方向设置在上游侧。

公开(公告)号：US20210302866A1

公开(公告)日：2021-09-30

申请号：US17206248

申请日：2021-03-19

Applicant: KYOCERA Document Solutions Inc.

Inventor： Tamotsu SHIMIZU ,  Norio KUBO ,  Asami SASAKI ,  Yasuhiro TAUCHI ,  Yuji TOYOTA

IPC: G03G15/06

Abstract: A bias condition determiner executes a direct current voltage determination mode (DC calibration) for determining a reference direct current voltage that is a reference for a direct current voltage of a developing bias applied to a developing roller in an image forming operation and an inter-peak voltage determination mode (AC calibration) for determining a reference inter-peak voltage that is a reference for an inter-peak voltage of an alternating current voltage of the developing bias applied to the developing roller in the image forming operation. A calibration executor determines whether the inter-peak voltage determination mode needs to be executed in accordance with a value of the reference direct current voltage.

公开(公告)号：US20180253033A1

公开(公告)日：2018-09-06

申请号：US15890702

申请日：2018-02-07

Applicant: KYOCERA Document Solutions Inc.

Inventor： Masashi FUJISHIMA ,  Norio KUBO ,  Junichi NAKAGAWA ,  Asami SASAKI

IPC: G03G15/08

CPC classification number: G03G15/0891 ,  G03G15/0829 ,  G03G15/0849 ,  G03G15/0853 ,  G03G15/0865 ,  G03G15/0889 ,  G03G15/0893 ,  G03G15/095 ,  G03G2215/0607 ,  G03G2215/066 ,  G03G2215/0819 ,  G03G2215/083 ,  G03G2221/0005

Abstract: A developing device includes a developing container, first and second stirring-conveyance members, a developer carrier, a toner concentration sensor, a scraper, and a scraper attachment unit. The second stirring-conveyance member includes a rotation shaft, a first spiral blade to convey developer in an axial direction, and a second spiral blade to overlap a region where the first spiral blade is formed, which is opposite to the first spiral blade in phase, and lower than the first spiral blade in height in a radial direction. An absent region, where the second spiral blade does not exist, is formed in one pitch of the first spiral blade, the one pitch facing the toner concentration sensor. The scraper attachment unit is formed to extend, along a straight line passing through intersection points of the first and second spiral blades and parallel to the rotation shaft, into the absent region.

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：US20210364951A1

公开(公告)日：2021-11-25

申请号：US17322198

申请日：2021-05-17

Applicant: KYOCERA Document Solutions Inc.

Inventor： Asami SASAKI ,  Akira MATAYOSHI ,  Norio KUBO ,  Koji SUENAMI ,  Yuji TOYOTA ,  Tamotsu SHIMIZU ,  Masashi FUJISHIMA ,  Yasuhiro TAUCHI

IPC: G03G15/08

Abstract: A developing device includes a developer container, a developer carrier, and first and second members for stirring/conveying. The developer container includes a first partition wall between first and second chambers, a communication portion through which those chambers communicate at opposite ends of the first partition wall, a developer supply port, and a developer discharge portion. The first member stirs and conveys developer in the first chamber in a first direction. The second member stirs and conveys developer in the second chamber in a second direction and includes a regulating portion and a discharging blade. The developer container includes a second partition wall between the first chamber and the regulating portion. The gap from the upper end of the second partition wall to the inner surface of the developer container is larger than the gap thereto from the upper ends of a first helical blade and the regulating portion.

公开(公告)号：US20210364944A1

公开(公告)日：2021-11-25

申请号：US17322298

申请日：2021-05-17

Applicant: KYOCERA Document Solutions Inc.

Inventor： Masashi FUJISHIMA ,  Norio KUBO ,  Asami SASAKI ,  Yasuhiro TAUCHI ,  Tamotsu SHIMIZU ,  Akira MATAYOSHI ,  Masaki KADOTA ,  Koji SUENAMI ,  Yuji TOYOTA

IPC: G03G15/08

Abstract: A developing device includes a developer container, a developer carrier, and first and second stirring/conveying members. The developer container includes a first partition wall partitioning between the two conveying chambers longitudinally, a first communication portion for passing developer from the first to the second conveying chamber, a second communication portion for passing developer from the second to the first conveying chamber, a developer supply port for supplying developer in, a developer discharge portion for discharging excessive developer, a second partition wall arranged, adjacent to the regulating portion, downstream of the second communication portion to partition between the first conveying chamber and the regulating portion, and a shield portion connected to the two partition walls to bridge between them to shield a top part of the second communication portion. A gap is formed between an upper end part of the shield portion and the inner surface of the developer container.