公开(公告)号：US20200292967A1

公开(公告)日：2020-09-17

申请号：US16818215

申请日：2020-03-13

Applicant: Konica Minolta, Inc.

Inventor： Kazutoshi KOBAYASHI ,  Junji MURAUCHI ,  Ryoei IKARI ,  Shunichi TAKAYA ,  Kei YUASA

IPC: G03G15/095

Abstract: An image forming apparatus includes an image carrier that carries a toner image, a developer that develops a toner image on the image carrier, with a developing agent containing toner and carrier, a transferor that transfers the toner image being carried by the image carrier, a collection mechanism that collects the carrier on the image carrier by a magnetic force and an electrostatic force, and a hardware processor that controls removal of the toner adhering to the collection mechanism. The collection mechanism includes a collection roller that incorporates a magnet and that is rotatable while facing the image carrier, and a voltage applicator that applies a voltage to the collection roller. The hardware processor performs a toner removal mode to remove the toner, by setting a peripheral speed of at least one of the image carrier and the collection roller to less than a peripheral speed thereof for image formation.

公开(公告)号：US20190212671A1

公开(公告)日：2019-07-11

申请号：US16204707

申请日：2018-11-29

Applicant: Konica Minolta, Inc.

Inventor： Aiko KUBOTA ,  Hiroyuki SAITO ,  Shunichi TAKAYA ,  Kazuteru ISHIZUKA ,  Kei OKAMURA

IPC: G03G15/08

Abstract: An image forming apparatus includes: a developer casing that accommodates a developer; an developer detector that is disposed in the developer casing, and that detects, based on magnetic force, the developer from a plurality of detection ranges that is close to each other and is disposed side by side in a vertical direction in the developer casing; and a hardware processor that performs control of detecting a liquid level position of the developer in the developer casing, based on a detection result detected by the developer detector.

公开(公告)号：US20180284644A1

公开(公告)日：2018-10-04

申请号：US15904753

申请日：2018-02-26

Applicant: KONICA MINOLTA, INC.

Inventor： Kei YUASA ,  Shunichi TAKAYA ,  Hideaki TANAKA ,  Kazuteru ISHIZUKA ,  Shota SAKURAI ,  Kei OKAMURA

IPC: G03G15/08 ,  G03G9/113

CPC classification number: G03G15/0849 ,  G03G9/1131 ,  G03G15/0812 ,  G03G15/087 ,  G03G15/0893 ,  G03G15/6511 ,  G03G21/1867

Abstract: A developing apparatus includes: a developer carrying member carrying a developer; a plurality of developer feeders accommodating the developer carried by the developer carrying member and being arranged in an axial direction of the developer carrying member; and a collecting part that collects the developer from the developer carrying member and feeds the developer to a second developer feeder different from a first developer feeder located at a position where the developer is collected from the developer carrying member in the axial direction, among the plurality of developer feeders.

公开(公告)号：US20180107137A1

公开(公告)日：2018-04-19

申请号：US15728593

申请日：2017-10-10

Applicant: Konica Minolta, Inc.

Inventor： Kei OKAMURA ,  Shunichi TAKAYA ,  Hideaki TANAKA ,  Kazuteru ISHIZUKA ,  Shota SAKURAI ,  Kei YUASA

IPC: G03G15/08

CPC classification number: G03G15/105 ,  G03G15/0893

Abstract: A developing device includes a hardware processor that performs control in which a developer circulation state is switched between a first state and a second state depending on states of the developer in the first and the second regions. The first state is a state in which a developer circulation path is formed in each of the first and the second regions, and the second state is a state in which a single developer circulation path is formed all through the first and the second regions.