公开(公告)号：US20170235248A1

公开(公告)日：2017-08-17

申请号：US15427385

申请日：2017-02-08

Applicant: KONICA MINOLTA, INC.

Inventor： Toshiaki SHIMA ,  Masanori KAWADA ,  Yohei ITO ,  Shinya TOKUTAKE ,  Hiroaki UMEMOTO

IPC: G03G15/09

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

Abstract: A development device includes: a developer carrier including a magnet roller and a sleeve around the magnet roller; and a restriction member provided opposed to the sleeve surface. When a region on the surface opposed to the restriction member is defined as a first region and regions adjacent to the first region are defined as second and third regions, a magnetic flux density is largest in the second region. When a position where the density is largest in the second region is defined as a reference position, a position where the density is a predetermined value in the second region is defined as a downstream position, and a position where the density is the predetermined value in the third region is defined as an upstream position, the width between the reference position and the upstream position is longer than the width between the reference position and the downstream position.

公开(公告)号：US20200238730A1

公开(公告)日：2020-07-30

申请号：US16727098

申请日：2019-12-26

Applicant: Konica Minolta, Inc.

Inventor： Hajime KAWAKAMI ,  Yusuke MAMIYA ,  Yusuke NISHISAKA ,  Shinya TOKUTAKE

IPC: B41J11/00

Abstract: An image forming apparatus includes: a drop applier that applies a drop to a surface of a coating layer formed on a surface of a recording medium; a viscosity improver that improves viscosity of the drop on the surface of the coating layer; and a roller that rolls the drop improved in viscosity, wherein the drop at a time of rolling has lower viscosity than the coating layer.

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.