公开(公告)号：US11079697B2

公开(公告)日：2021-08-03

申请号：US17126127

申请日：2020-12-18

Applicant: KYOCERA Document Solutions Inc.

Inventor： Kanako Morimoto ,  Tamotsu Shimizu ,  Kazunori Tanaka ,  Hiroka Itani

IPC: G03G15/00 ,  G03G15/02 ,  G03G21/00

Abstract: According to one embodiment, an image forming apparatus includes an image forming portion, and a control portion. The image forming portion includes an image carrier, a charging device, and a cleaning device. The charging device includes a charging roller which contacts a surface of the image carrier. The cleaning device includes a cleaning blade, and an adjustment portion. The cleaning blade slidably contacts the surface of the image carrier. The adjustment portion adjusts a linear pressure of the cleaning blade exerted on the surface of the image carrier. The control portion executes, when a rate of increase of an outer layer resistance value of the charging roller caused by a decrease in the function of the cleaning blade is greater than or equal to a first rate, linear pressure adjustment control of controlling the adjustment portion to increase the linear pressure of the cleaning blade.

公开(公告)号：US10775712B2

公开(公告)日：2020-09-15

申请号：US16424566

申请日：2019-05-29

Applicant: KYOCERA Document Solutions Inc.

Inventor： Tamotsu Shimizu ,  Yasushi Imanishi

IPC: G03G15/06

Abstract: An image forming apparatus includes a storage unit and a charging amount acquisition unit. The charging amount acquisition unit forms a measurement toner image on the image carrier while changing the frequency of the alternating current voltage of the development bias with the potential difference in the direct current voltage between the developing roller and the image carrier being kept constant, acquires a tilt of a measurement straight line representing a relationship between the change amount of the frequency and the density change amount of the measurement toner image, based on the change amount of the frequency and a result of detecting density of the measurement toner image in the density detecting unit, and acquires a charging amount of the toner included in the measurement toner image formed on the image carrier based on the acquired tilt of the measurement straight line and the reference information in the storage unit according to the toner density detected by the toner density detecting unit.

公开(公告)号：US10534281B2

公开(公告)日：2020-01-14

申请号：US16182087

申请日：2018-11-06

Applicant: KYOCERA Document Solutions Inc.

Inventor： Tamotsu Shimizu ,  Hiroka Itani ,  Kenichi Tamaki

IPC: G03G15/02 ,  G03G21/06 ,  D02G3/12

Abstract: An image forming apparatus has an image carrier, an electrifying member, and a charge eliminating device, and eliminates remaining charge on the surface of the image carrier by the charge eliminating device. The charge eliminating device includes a discharge member. The discharge member includes an electro conductive knit fabric knitted in a cylindrical shape using twisted yarn made of twisted metal fibers and a support member having a cylindrical shape and inserted in the electro conductive knit fabric, and is disposed to face the image carrier in a noncontact manner. A magnet member is disposed inside the image carrier within a charge elimination nip width between two tangential lines of an outer circumference surface of the discharge member, the two tangential lines being parallel to a straight line passing through a rotation center of the image carrier and a center axis of the discharge member.

公开(公告)号：US20190369537A1

公开(公告)日：2019-12-05

申请号：US16424816

申请日：2019-05-29

Applicant: KYOCERA Document Solutions Inc.

Inventor： Akifumi Yamaguchi ,  Koji Suenami ,  Yasushi Imanishi ,  Tamotsu Shimizu

IPC: G03G15/00

Abstract: An image forming apparatus includes a storage unit and a charging amount acquisition unit. The charging amount acquisition unit performs a charging amount acquisition operation for forming a measurement toner image on the image carrier while changing the frequency of the alternating current voltage of the development bias with a potential difference in a direct current voltage between the developing roller and the image carrier being kept constant, acquiring a tilt of a measurement straight line representing a relationship between the change amount of the frequency and a density change amount of the measurement toner image, and acquiring the charging amount of the toner based on the acquired tilt of the measurement straight line and the reference information in the storage unit.

公开(公告)号：US09983499B2

公开(公告)日：2018-05-29

申请号：US15464860

申请日：2017-03-21

Applicant: KYOCERA Document Solutions Inc.

Inventor： Kenichi Tamaki ,  Tamotsu Shimizu ,  Hiroka Itani

IPC: G03G21/00 ,  G03G15/02 ,  G03G15/00

CPC classification number: G03G15/0241 ,  G03G15/6552 ,  G03G21/06

Abstract: A discharging member includes an electrically conductive knit fabric, a support member, and a first magnet member. The conductive knit fabric is knitted into a cylindrical shape with use of yarn formed by twisting together a plurality of metal fibers. The support member is cylindrical shaped and inserted in the conductive knit fabric. The first magnet member is placed inside the support member. With the conductive knit fabric grounded or with a voltage applied to the conductive knit fabric, the discharging member is placed in noncontact with a discharged member in such a fashion that the first magnet member is opposed to the discharged member with the support member and the conductive knit fabric interposed therebetween.

公开(公告)号：US09864298B2

公开(公告)日：2018-01-09

申请号：US15480473

申请日：2017-04-06

Applicant: KYOCERA Document Solutions Inc.

Inventor： Tamotsu Shimizu ,  Yasuhiro Tauchi

IPC: G03G15/09 ,  G03G15/08

CPC classification number: G03G15/0812 ,  G03G15/0889 ,  G03G15/0893 ,  G03G15/0921 ,  G03G15/0928

Abstract: A developing device includes a housing, a developing roller, a developer stirring member, and a layer thickness regulating member. The developing roller includes a stationary magnet and a sleeve. The stationary magnet includes a first magnetic pole having a specific polarity, and a second magnetic pole lying downstream of the first magnetic pole and having the same polarity as the first magnetic pole. In an entire inter-pole region between the first magnetic pole and the second magnetic pole, the stationary magnet produces a magnetic force including a horizontal component that keeps the specific polarity and has a value greater than zero (mT). The inter-pole region includes a flat area where a horizontal magnetic force component having a minimum absolute value exits and the horizontal magnetic force component changes within a range of 0.5 (mT) or less, the flat area extending over a range of 10 degrees or more.

公开(公告)号：US09829829B2

公开(公告)日：2017-11-28

申请号：US15456938

申请日：2017-03-13

Applicant: KYOCERA Document Solutions Inc.

Inventor： Tamotsu Shimizu ,  Eiji Gyotoku ,  Akihiro Watanabe ,  Norio Kubo ,  Minoru Wada ,  Ryo Taniguchi ,  Yasushi Imanishi ,  Takahiro Okubo

IPC: G03G15/08 ,  G03G15/09

CPC classification number: G03G15/0889 ,  G03G15/065 ,  G03G15/0808 ,  G03G15/0907 ,  G03G15/0921

Abstract: A developing device includes a developing roller, a conveyor roller, a developer stirring unit and a development bias applying unit. The developing roller is arranged to face a photoconductive drum at a predetermined developing position and supplies the toner. The conveyor roller is arranged to face the developing roller at a predetermined facing position and supplies the developer to the developing roller. The development bias applying unit applies development biases to the first sleeve of the developing roller and the second sleeve of the conveyor roller during a developing operation of developing the electrostatic latent image on the photoconductive drum with the toner. The development bias applying unit applies the development biases such that a shifting electric field to move the toner on the first sleeve of the developing roller toward the second sleeve of the conveyor roller is formed at the facing position during the developing operation.

公开(公告)号：US09304479B1

公开(公告)日：2016-04-05

申请号：US14879782

申请日：2015-10-09

Applicant: KYOCERA Document Solutions Inc.

Inventor： Tamotsu Shimizu ,  Ryo Taniguchi ,  Akifumi Yamaguchi

IPC: G03G21/00 ,  G03G15/08

CPC classification number: G03G21/0058 ,  G03G15/0806 ,  G03G15/0808 ,  G03G15/0815 ,  G03G15/751 ,  G03G21/0064 ,  G03G2215/00957

Abstract: In an image forming apparatus, a coating layer of each of a photoconductor drum and a collecting roller has been formed by a dipping method in which a base body of each of the photoconductor drum and the collecting roller is dipped in a liquid in a state where the base body is in a vertical attitude such that a first end of the base body faces down and a second end of the base body faces up. The collecting roller is supported in a state where the first end of the collecting roller base body and the second end of the drum base body face a same direction.

Abstract translation: 在图像形成装置中，通过浸渍方法形成感光鼓和收集辊中的每一个的涂层，其中每个感光鼓和收集辊的基体浸渍在液体中， 基体处于垂直姿态，使得基体的第一端面向下并且基体的第二端面朝上。 收集辊在收集辊基体的第一端和鼓基体的第二端面向相同方向的状态下被支撑。

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：US20150261127A1

公开(公告)日：2015-09-17

申请号：US14643578

申请日：2015-03-10

Applicant: KYOCERA Document Solutions Inc.

Inventor： Masashi Fujishima ,  Yoshinobu Yoneima ,  Tamotsu Shimizu

IPC: G03G15/06

CPC classification number: G03G15/065 ,  G03G15/0907

Abstract: An image forming apparatus includes an image carrier, a developing device, a bias applying unit, a leakage detecting unit, a bias control unit and a leakage detection control unit. The developing device includes a magnetic roller and a developing roller. The magnetic roller carries a developer layer by being rotated. The developing roller receives the toner from the developer layer and supplies the toner to the image carrier. The leakage detection control unit performs a leakage detecting operation of detecting a value of an inter-peak voltage, at which the leakage occurred. The leakage detection control unit simultaneously starts the leakage detecting operation for a plurality of developing devices and performs the leakage detecting operations of the developing devices in which leakage simultaneously occurred while switching the leakage detecting operations one by one if the leakage simultaneously occurs in a plurality of developing devices at an inter-peak voltage.

Abstract translation: 图像形成装置包括图像载体，显影装置，偏压施加单元，泄漏检测单元，偏置控制单元和泄漏检测控制单元。 显影装置包括磁辊和显影辊。 磁性辊通过旋转承载显影剂层。 显影辊从显影剂层接收调色剂并将调色剂供应到图像载体。 泄漏检测控制单元执行检测发生泄漏的峰间电压的值的泄漏检测操作。 泄漏检测控制单元同时开始多个显影装置的泄漏检测操作，并且如果在多个显影装置中同时发生泄漏的同时一次一个地切换泄漏检测操作，则同时进行泄漏同时发生的显影装置的泄漏检测操作 以峰间电压开发器件。