公开(公告)号：US20170205728A1

公开(公告)日：2017-07-20

申请号：US15404801

申请日：2017-01-12

Applicant: KYOCERA Document Solutions Inc.

Inventor： Tetsuya TOICHI

IPC: G03G15/02 ,  G03G15/16

CPC classification number: G03G15/0266 ,  G03G15/1605 ,  G03G15/1675

Abstract: An image forming apparatus includes a photosensitive drum, a primary transfer roller, first and second voltage applicators, first and second voltage controllers, a current detector, and a charging roller. The first voltage controller controls a voltage applied to the primary transfer roller through the first voltage applicator. The current detector detects a current value of a current flowing through the primary transfer roller. The second voltage controller controls a voltage applied to the charging roller through the second voltage applicator. The second voltage controller causes a voltage having a smaller absolute value than a dark potential of the photosensitive drum to be applied to the photosensitive drum during a transfer voltage control period. During the transfer voltage control period, the first voltage controller causes a voltage to be applied to the primary transfer roller, and the current detector detects the current value.

公开(公告)号：US20200301320A1

公开(公告)日：2020-09-24

申请号：US16800535

申请日：2020-02-25

Applicant: KYOCERA Document Solutions Inc.

Inventor： Yoshitaka TOKORO ,  Tetsuya TOICHI

IPC: G03G15/16 ,  G03G15/02

Abstract: An image forming apparatus includes an intermediate transfer belt, an image forming device, a brush roller, a bias application device, and a controller. The bias application device applies, between the intermediate transfer belt and the brush roller, a bias for shifting a charged residual toner from the intermediate transfer belt to the brush roller. The controller controls, in a period in which calibration or maintenance is executed, the bias application device to set an application amount of the bias at a predefined first value only in a specified time zone in which the residual toner is present on the intermediate transfer belt and to set the application amount of the bias at a predefined second value smaller than the first value in time zones other than the specified time zone.

公开(公告)号：US20160139527A1

公开(公告)日：2016-05-19

申请号：US14939500

申请日：2015-11-12

Applicant: KYOCERA Document Solutions Inc.

Inventor： Tetsuya TOICHI

IPC: G03G15/01 ,  G03G15/16

CPC classification number: G03G15/0131 ,  G03G15/0189 ,  G03G15/161 ,  G03G15/1665 ,  G03G15/1675

Abstract: An image forming apparatus includes development sections having development rollers, photosensitive drums, primary transfer rollers disposed opposite to the photosensitive drums in one-to-one correspondence, an intermediate transfer belt, and a voltage application section. The voltage application section includes a first voltage application section and a second voltage application section. In forced toner discharge from the development sections, the first voltage application section applies opposite polarity voltage between each of three upstream primary transfer rollers among the primary transfer rollers and the corresponding one of the photosensitive drums. The second voltage application section applies positive polarity voltage between a most downstream primary transfer roller and the corresponding one of the photosensitive drums.

Abstract translation: 图像形成装置包括具有显影辊，感光鼓，一对一对应于感光鼓相对设置的一次转印辊的显影部，中间转印带和电压施加部。 电压施加部分包括第一电压施加部分和第二电压施加部分。 在强制调色剂从显影部分排出时，第一电压施加部分在一次转印辊和相应的一个感光鼓之间的三个上游一次转印辊之间的每一个之间施加相反的极性电压。 第二电压施加部分在最下游一次转印辊和相应的一个感光鼓之间施加正极性电压。