公开(公告)号：US11747752B2

公开(公告)日：2023-09-05

申请号：US17662938

申请日：2022-05-11

Applicant: Konica Minolta, Inc.

Inventor： Hidetoshi Noguchi ,  Kazuki Shimizu

IPC: G03G15/00 ,  G03G15/16 ,  G03G15/08

CPC classification number: G03G15/1615 ,  G03G15/0808 ,  G03G2215/1623

Abstract: An image forming apparatus includes a developer that forms a toner image on an endless belt that is suspended over outer portions of a plurality of rollers, a driver that rotates at least one driving roller out of the plurality of rollers, a position adjustment mechanism that corrects relative positions of the plurality of rollers relative to one another, and a hardware processor, wherein the hardware processor controls the position adjustment mechanism to correct a relative position between the belt and the driving roller with tension applied to the belt being a second tension smaller than a first tension that is applied in a developing state in which a toner image is formed on the belt by the developer.

公开(公告)号：US09851660B2

公开(公告)日：2017-12-26

申请号：US14947214

申请日：2015-11-20

Applicant: Konica Minolta, Inc.

Inventor： Hidetoshi Noguchi ,  Satoru Shibuya ,  Kazuyoshi Hara

IPC: G03G15/16 ,  G03G15/00 ,  G03G15/01

CPC classification number: G03G15/1665 ,  G03G15/0131 ,  G03G15/161 ,  G03G15/6532 ,  G03G15/6535 ,  G03G2215/004 ,  G03G2215/0132

Abstract: An image forming apparatus has an image carrier that carries a toner image; a transfer member that is opposed to the image carrier, a transfer voltage being applied to the transfer member so that the toner image is transferred from the image carrier to a print medium passing between the transfer member and the image carrier; a first voltage application device that applies the transfer voltage to the transfer member; a separation member to which a separation voltage is applied so that the print medium is separated from the image carrier; a second voltage application device that applies the separation voltage to the separation member; a sensing device that senses an image density of the toner image; and a control section that controls a magnitude of the separation voltage based upon the image density of the toner image.

公开(公告)号：US09625869B2

公开(公告)日：2017-04-18

申请号：US14986782

申请日：2016-01-04

Applicant: Konica Minolta, Inc.

Inventor： Hidetoshi Noguchi ,  Kazutoshi Kobayashi ,  Tomohisa Yoshida ,  Kazuya Kitamura ,  Ryohei Matsuo

IPC: G03G21/00 ,  G03G15/08

CPC classification number: G03G21/00 ,  G03G15/0893 ,  G03G21/0005 ,  G03G21/0094

Abstract: An image forming apparatus having: an image supporting member; an electrostatic latent image forming section; and a developing device. In the developing device, a supply member receives toner, polish and antifriction at a supply part. The supply member supplies the toner, the polish and the antifriction to a developing roller while conveying the toner, the polish and the antifriction in a predetermined direction along a rotation axis of the image supporting member. A developing roller develops an electrostatic latent image by supplying the toner, the polish and the antifriction to the image supporting member. A toner patch is formed on the image supporting member, in a facing area capable of facing the developing roller, such that the amount of toner adhering to the image supporting member decreases with increasing distance in the predetermined direction from the supply part. A cleaner removes the toner patch from the image supporting member.

公开(公告)号：US10185270B2

公开(公告)日：2019-01-22

申请号：US15704950

申请日：2017-09-14

Applicant: KONICA MINOLTA, INC.

Inventor： Masanori Kawada ,  Hiroaki Umemoto ,  Yohei Ito ,  Toshiaki Shima ,  Kazuyoshi Ota ,  Shinya Tokutake ,  Hidetoshi Noguchi ,  Shinichi Yoshimoto ,  Futoshi Okazaki

IPC: G03G15/08 ,  G03G15/00

Abstract: An image forming apparatus includes an image former which forms an image on an image carrying member with toner stored in a storage, a toner supplier which supplies toner to the storage by driving a conveyance member, a density measurer which causes the image former to form an image having a predetermined density at a predetermined timing and measures density of the formed image, a corrector which corrects a driving amount of the conveyance member based on the density measured by the density measurer, and a changer which changes a timing when the density measurer measures the density in response to an event that a predetermined condition is satisfied.

公开(公告)号：US09195213B2

公开(公告)日：2015-11-24

申请号：US14309734

申请日：2014-06-19

Applicant: KONICA MINOLTA, INC.

Inventor： Kazuyoshi Hara ,  Hidetoshi Noguchi ,  Satoru Shibuya ,  Takahiro Kuroda

IPC: G03G15/00 ,  G03G21/20

CPC classification number: G03G21/206 ,  G03G15/6573 ,  G03G2215/00679

Abstract: An image forming apparatus includes an image carrier configured to carry a toner image. A transfer unit is configured to transfer the toner image on the image carrier onto a recording sheet. A fixing unit is configured to fix the toner image transferred at the transfer unit onto the recording sheet. Through a conveyance path, the recording sheet is conveyed from the transfer unit to the fixing unit. A conveyance guide member is disposed in the conveyance path on an image formation surface side of the recording sheet. A fan is configured to send air from the transfer unit to the conveyance path toward a gap defined between the conveyance guide member and the transfer unit so as to form a flow of air in the conveyance path from an upstream side to a downstream side in a conveyance direction of the recording sheet.

Abstract translation: 图像形成装置包括构造成承载调色剂图像的图像载体。 传送单元被配置为将图像载体上的调色剂图像转印到记录片材上。 固定单元构造成将转印单元上转印的调色剂图像固定在记录纸上。 通过输送路径，记录纸从传送单元传送到定影单元。 输送引导构件设置在记录纸的图像形成表面侧上的输送路径中。 风扇被构造成将空气从传送单元传送到输送路径，朝向在输送引导构件和转印单元之间限定的间隙，从而在输送路径中形成从上游侧到下游侧的空气流 记录纸的输送方向。

公开(公告)号：US09091968B2

公开(公告)日：2015-07-28

申请号：US13887954

申请日：2013-05-06

Applicant: Konica Minolta, Inc.

Inventor： Kazuyoshi Hara ,  Takahiro Kuroda ,  Hidetoshi Noguchi ,  Satoru Shibuya

IPC: G03G15/16

CPC classification number: G03G15/1665 ,  G03G15/1675

Abstract: An image forming apparatus having: an image support that supports a toner image; a transfer member adapted to sandwich with the transfer member and the image support; a voltage application unit that applies a transfer bias voltage to the transfer member; a current detecting unit that detects transfer current flowing from the voltage application unit to the transfer material after transfer processing on the transfer material starts; and a control unit that sets an upper limit of transfer current on the basis of a value of the transfer current detected by the current detecting unit, and thereafter further acquires a transfer current value from the current detecting unit to control a transfer bias voltage generated by the voltage application unit, such that the transfer current value during transfer does not exceed the upper limit.

Abstract translation: 一种图像形成装置，具有：支撑调色剂图像的图像支持体; 转印构件，其适于与所述转印构件和所述图像载体夹层; 电压施加单元，向转印构件施加转印偏压; 电流检测单元检测在转印材料的转印处理之后开始从电压施加单元向转印材料流动的转印电流; 以及控制单元，其基于由电流检测单元检测到的转移电流的值来设定转移电流的上限，然后进一步从电流检测单元获取转移电流值，以控制由 电压施加单元，使得转印期间的转印电流值不超过上限。

公开(公告)号：US20130294792A1

公开(公告)日：2013-11-07

申请号：US13887954

申请日：2013-05-06

Applicant: KONICA MINOLTA, INC.

Inventor： Kazuyoshi HARA ,  Takahiro Kuroda ,  Hidetoshi Noguchi ,  Satoru Shibuya

IPC: G03G15/16

CPC classification number: G03G15/1665 ,  G03G15/1675

Abstract: An image forming apparatus having: an image support that supports a toner image; a transfer member adapted to sandwich with the transfer member and the image support; a voltage application unit that applies a transfer bias voltage to the transfer member; a current detecting unit that detects transfer current flowing from the voltage application unit to the transfer material after transfer processing on the transfer material starts; and a control unit that sets an upper limit of transfer current on the basis of a value of the transfer current detected by the current detecting unit, and thereafter further acquires a transfer current value from the current detecting unit to control a transfer bias voltage generated by the voltage application unit, such that the transfer current value during transfer does not exceed the upper limit.

Abstract translation: 一种图像形成装置，具有：支撑调色剂图像的图像支持体; 转印构件，其适于与所述转印构件和所述图像载体夹层; 电压施加单元，向转印构件施加转印偏压; 电流检测单元检测在转印材料的转印处理之后开始从电压施加单元向转印材料流动的转印电流; 以及控制单元，其基于由电流检测单元检测到的转移电流的值来设定转移电流的上限，然后进一步从电流检测单元获取转移电流值，以控制由 电压施加单元，使得转印期间的转印电流值不超过上限。

公开(公告)号：US10209646B1

公开(公告)日：2019-02-19

申请号：US16032220

申请日：2018-07-11

Applicant: KONICA MINOLTA, INC.

Inventor： Kazuyoshi Ota ,  Hiroaki Umemoto ,  Futoshi Okazaki ,  Hidetoshi Noguchi ,  Masanori Kawada

IPC: G03G15/09 ,  G03G15/02 ,  G03G15/16 ,  G03G15/00

Abstract: An image forming apparatus includes: an image carrier that rotates while carrying a toner image; an image former that forms the toner image; a transfer roller that transfers the toner image to a recording medium; and a bias voltage applier that applies a voltage to the transfer roller, wherein the image former forms transfer images and forms a patch image with toner between a first transfer image and a second transfer image, and the bias voltage applier applies a first voltage having a polarity opposite to a charge polarity of the toner to the transfer roller, applies a second voltage having the polarity opposite to the charge polarity of the toner and larger than the first voltage to the transfer roller, and applies a third voltage having the polarity opposite to the charge polarity of the toner and smaller than the second voltage to the transfer roller.

公开(公告)号：US10591848B2

公开(公告)日：2020-03-17

申请号：US16183166

申请日：2018-11-07

Applicant: Konica Minolta, Inc.

Inventor： Toshiaki Shima ,  Shinya Tokutake ,  Hidetoshi Noguchi ,  Hiroaki Umemoto

IPC: G03G15/09

Abstract: A magnet roller includes a magnet portion for generating magnetic force such that a plurality of peaks are formed in a magnetic force distribution. The magnet portion includes a plurality of magnetic poles. A cross section of the magnet portion includes a portion in which a distance from an axial center of the magnet portion to an outer edge of the magnet portion continuously changes in the circumferential direction. The magnetic force on a surface of a developing sleeve at a position corresponding to each of the plurality of magnetic poles is determined by (i) a distance from each of the plurality of magnetic poles to the developing sleeve in a radial direction of the developing sleeve and (ii) a magnitude of magnetic force in each of the plurality of magnetic poles. The distances from the plurality of magnetic poles to the developing sleeve in the radial direction are different.

公开(公告)号：US20160077470A1

公开(公告)日：2016-03-17

申请号：US14947214

申请日：2015-11-20

Applicant: Konica Minolta, Inc.

Inventor： Hidetoshi Noguchi ,  Satoru Shibuya ,  Kazuyoshi Hara

IPC: G03G15/16

CPC classification number: G03G15/1665 ,  G03G15/0131 ,  G03G15/161 ,  G03G15/6532 ,  G03G15/6535 ,  G03G2215/004 ,  G03G2215/0132

Abstract: An image forming apparatus has an image carrier that carries a toner image; a transfer member that is opposed to the image carrier, a transfer voltage being applied to the transfer member so that the toner image is transferred from the image carrier to a print medium passing between the transfer member and the image carrier; a first voltage application device that applies the transfer voltage to the transfer member; a separation member to which a separation voltage is applied so that the print medium is separated from the image carrier; a second voltage application device that applies the separation voltage to the separation member; a sensing device that senses an image density of the toner image; and a control section that controls a magnitude of the separation voltage based upon the image density of the toner image.

Abstract translation: 图像形成装置具有承载调色剂图像的图像载体; 与图像载体相对的转印构件，将转印电压施加到转印构件，使得调色剂图像从图像载体转印到通过转印构件和图像载体之间的打印介质; 将转印电压施加到转印部件的第一电压施加装置; 分隔构件，其上施加有分离电压，使得打印介质与图像载体分离; 将分离电压施加到分离部件的第二电压施加装置; 感测装置，其感测调色剂图像的图像浓度; 以及控制部分，其基于调色剂图像的图像浓度来控制分离电压的大小。