公开(公告)号：US09069293B2

公开(公告)日：2015-06-30

申请号：US14257761

申请日：2014-04-21

Applicant: KYOCERA Document Solutions Inc.

Inventor： Kensuke Fujihara

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

CPC classification number: G03G15/0907 ,  G03G15/065 ,  G03G15/0806 ,  G03G15/0808 ,  G03G2215/0634

Abstract: A developing device includes a developing roller, a magnetic roller opposed to the developing roller so as to form a magnetic brush, a high voltage power supply including a transformer having secondary side outputs one of which is connected to the developing roller while the other output is connected to the magnetic roller, so as to apply AC voltages to the developing roller and the magnetic roller, a detection portion for detecting occurrence of discharge between the developing roller and the photoreceptor drum, a restriction portion for restricting movement of toner from the magnetic roller to the developing roller, and a moving portion configured to move the restriction portion in discharge start voltage detection mode so as to restrict toner movement to the developing roller.

Abstract translation: 显影装置包括显影辊，与显影辊相对的磁辊以形成磁刷，包括具有二次侧输出的变压器的高压电源，其中一个连接到显影辊，而另一个输出为 连接到磁性辊，以便向显影辊和磁性辊施加AC电压，用于检测显影辊和感光鼓之间的放电发生的检测部分，用于限制调色剂从磁性辊移动的限制部分 以及移动部分，其构造成在排出开始电压检测模式下移动限制部分，以限制调色剂向显影辊的移动。

公开(公告)号：US20180341205A1

公开(公告)日：2018-11-29

申请号：US15986611

申请日：2018-05-22

Applicant: KYOCERA Document Solutions Inc.

Inventor： Kensuke Fujihara

IPC: G03G15/00 ,  G03G15/08

CPC classification number: G03G15/5004 ,  G03G15/065 ,  G03G15/08 ,  G03G15/55

Abstract: An AC measuring circuit measures a magnitude of an alternating current flowing through a bias applying circuit synchronized with a cycle of an AC voltage in a developing bias voltage. A control unit changes a level of the AC voltage in the developing bias voltage, and executes a developing bias adjustment process for setting a level of the AC voltage based on the level of the AC voltage when the leakage current detecting circuit detects the direct current. The control unit, when a measurement by the AC measuring circuit during execution of a developing process exceeds a predetermined allowable value, executes a warning process to prompt execution of the developing bias adjustment process, or the control unit executes the developing bias adjustment process to update the level of the AC voltage.

公开(公告)号：US09829825B2

公开(公告)日：2017-11-28

申请号：US15367166

申请日：2016-12-01

Applicant: KYOCERA Document Solutions Inc.

Inventor： Kensuke Fujihara

IPC: G03G15/06

CPC classification number: G03G15/065 ,  G03G15/0266

Abstract: A controller (a) increases a development bias when a surface potential of the photoconductor drum is 0 Volt, and determines a level of the development bias as a discharge voltage at a timing when discharge is detected between a photoconductor drum and a developing roller, (b) sets an alternating current component of the development bias so as to make a lowest level of the development bias equal to a level lower by the discharge voltage than a desired surface potential of the photoconductor drum, and (c) increases an applied voltage to a charging roller (that charges a surface of the photoconductor drum) when applying to the developing roller the development bias of which the alternating current component has been set, and determines as an applied voltage to the charging roller corresponding to the desired surface potential, the applied voltage at a timing when the discharge is detected.

公开(公告)号：US09459553B2

公开(公告)日：2016-10-04

申请号：US14815347

申请日：2015-07-31

Applicant: KYOCERA Document Solutions Inc.

Inventor： Kensuke Fujihara

IPC: G03G15/06 ,  G03G15/08

CPC classification number: G03G15/065 ,  G03G15/0808

Abstract: An image forming apparatus includes a first roller, a second roller, a first voltage applying section, and a control section. An electrostatic latent image is formed on the first roller. The second roller is located opposite to the first roller with a first gap therebetween. The first voltage applying section applies voltage to the second roller. The control section determines a first voltage value to be applied to the second roller during development of the electrostatic latent image. The control section determines a first distance non-uniformity value indicating a degree of non-uniformity of a distance across the first gap. The control section determines a first indicator value by increasing voltage applied to the second roller in stages and performing electrical discharge measurement at each of the stages. The control section determines the first voltage value based on the first distance non-uniformity value and the first indicator value.

Abstract translation: 图像形成装置包括第一辊，第二辊，第一电压施加部和控制部。 在第一辊上形成静电潜像。 第二辊与第一辊相对设置，其间具有第一间隙。 第一电压施加部分向第二辊施加电压。 控制部确定在静电潜像的显影期间施加到第二辊的第一电压值。 控制部确定表示跨越第一间隙的距离的不均匀度的第一距离非均匀性值。 控制部分通过逐级地增加施加到第二辊的电压并且在每个阶段执行放电测量来确定第一指示器值。 控制部基于第一距离不均匀值和第一指示值确定第一电压值。