公开(公告)号：US08934800B2

公开(公告)日：2015-01-13

申请号：US14067022

申请日：2013-10-30

Applicant: KYOCERA Document Solutions Inc.

Inventor： Akira Matayoshi

IPC: G03G15/16

CPC classification number: G03G15/1675 ,  G03G2215/0132

Abstract: A transfer device includes image bearing members, an intermediate transfer belt, transfer members, a transfer bias applying unit and a bias control unit. The transfer bias applying unit applies a transfer bias to the transfer. The bias control unit causes a transfer bias having a polarity opposite to that of the toner to be applied to a first transfer member during the transfer process in the first transfer nip and during an adjacent transfer process which is the non-transfer process in the first transfer nip and the transfer process in a second transfer nip adjacent to the first transfer nip. Further, the bias control unit causes a transfer bias having the same polarity as that of the toner to be applied to the first transfer member during an adjacent non-transfer process which is the non-transfer process in the first transfer nip and the non-transfer process in the second transfer nip.

Abstract translation: 转印装置包括图像承载部件，中间转印带，转印部件，转印偏压施加单元和偏置控制单元。 转印偏压施加单元对转印施加转印偏压。 偏置控制单元在第一转印辊隙中的转印过程期间和在作为第一转印辊隙中的非转印过程的相邻转印处理期间，将具有与调色剂的极性相反的转印偏压施加到第一转印部件 转印辊隙和转印工艺在邻近第一转印辊隙的第二转印辊隙中。 此外，偏移控制单元在作为第一转印压区中的非转印工艺的相邻非转印工艺期间引起具有与调色剂相同的极性的转印偏压作用于第一转印部件， 在第二转印辊隙中的转印过程。

公开(公告)号：US11314183B2

公开(公告)日：2022-04-26

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.

公开(公告)号：US11209752B2

公开(公告)日：2021-12-28

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：US09239541B2

公开(公告)日：2016-01-19

申请号：US14713799

申请日：2015-05-15

Applicant: KYOCERA Document Solutions Inc.

Inventor： Tamotsu Shimizu ,  Akihiro Watanabe ,  Akira Matayoshi

IPC: G03G15/08

CPC classification number: G03G15/0822 ,  G03G15/0812 ,  G03G15/0813 ,  G03G15/0818 ,  G03G15/75

Abstract: A photosensitive drum is axially rotatable and has a surface on which an electrostatic latent image is formed. A developing device includes a development roller spaced from the photosensitive drum. The development roller includes a cylindrical sleeve and a coating layer, and the photosensitive drum includes a cylindrical tube and a functional layer. Each of the coating layer and functional layer is formed by dipping the sleeve or tube into a dipping bath with the sleeve or tube directed axially vertically. An axial end portion of the development roller that is lower during the dipping process is disposed opposite to an axial end portion of the photosensitive drum that is higher during the dipping process, and an axial end portion of the development roller that is higher during the dipping process is disposed opposite to an axial end portion of the photosensitive drum that is lower during the dipping process.

Abstract translation: 感光鼓可轴向旋转并具有形成有静电潜像的表面。 显影装置包括与感光鼓间隔开的显影辊。 显影辊包括圆柱形套筒和涂层，感光鼓包括圆柱形管和功能层。 每个涂层和功能层通过将套筒或管浸入浸渍浴中形成，套筒或管轴向垂直地指向。 显影辊的在浸渍过程中较低的轴向端部设置成与浸渍过程中感光鼓的轴向端部相对较高，而在浸渍过程中显影辊的轴向端部较高 工艺在浸渍过程中与感光鼓的轴向端部相对设置，其较低。

公开(公告)号：US11112732B1

公开(公告)日：2021-09-07

申请号：US17171357

申请日：2021-02-09

Applicant: KYOCERA Document Solutions Inc.

Inventor： Tamotsu Shimizu ,  Yasuhiro Tauchi ,  Akira Matayoshi ,  Masashi Fujishima

IPC: G03G15/09 ,  G03G15/16 ,  G03G15/08 ,  G03G15/02

Abstract: A bias condition determination portion of an image forming device executes each of: a first approximation expression determination operation that respectively acquires the DC component of the development current with at least three peak-to-peak voltages included in a first measurement range and determines a first expression showing a relation between the peak-to-peak voltage and the DC component of the acquired development current, a second approximation expression determination operation that respectively acquires the DC component of the development current with at least three peak-to-peak voltages included in a second measurement range larger than the first measurement range and determines a second approximation expression showing a relation between the peak-to-peak voltage and the DC component of the acquired development current, and a reference voltage determination operation that determines, as a reference peak-to-peak voltage, the peak-to-peak voltage at an intersection where the first approximation expression and the second approximation expression intersect each other.

公开(公告)号：US11048192B1

公开(公告)日：2021-06-29

申请号：US17113063

申请日：2020-12-06

Applicant: KYOCERA Document Solutions Inc.

Inventor： Yuji Toyota ,  Yasuhiro Tauchi ,  Masashi Fujishima ,  Norio Kubo ,  Akira Matayoshi

IPC: G03G15/08 ,  G03G15/09 ,  G03G15/06

Abstract: Provided is an image forming apparatus capable of suppressing the occurrence of image defects in response to a difference in carrier resistance and obtaining high image quality. A developing unit has a developing roller that carries toner in a two-component developer that includes a toner and a magnetic carrier on the surface thereof, and forms a toner image on the surface of a photosensitive drum. A current detecting unit detects developing current flowing between the developing roller and the photosensitive drum when a developing voltage is applied to the developing roller by a developing power supply. When the developing voltage is applied to the photosensitive drum, a control unit derives a carrier resistance based on the developing current detected by a current detecting unit, and controls an AC amplitude of an AC voltage of the developing voltage based on the carrier resistance.