公开(公告)号：US20190049879A1

公开(公告)日：2019-02-14

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 ,  G03G15/00 ,  G03G15/16 ,  G03G15/02

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：US20140376950A1

公开(公告)日：2014-12-25

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：US20220373941A1

公开(公告)日：2022-11-24

申请号：US17662938

申请日：2022-05-11

Applicant: Konica Minolta, Inc.

Inventor： Hidetoshi NOGUCHI ,  Kazuki SHIMIZU

IPC: G03G15/16 ,  G03G15/08

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：US20190187589A1

公开(公告)日：2019-06-20

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

CPC classification number: G03G15/0921

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：US20180088508A1

公开(公告)日：2018-03-29

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

CPC classification number: G03G15/556 ,  G03G15/0879

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.