公开(公告)号：US20210003938A1

公开(公告)日：2021-01-07

申请号：US16903725

申请日：2020-06-17

Applicant: Konica Minolta Inc.

Inventor： Futoshi OKAZAKI ,  Yasuyuki INADA ,  Noriyuki KINPARA ,  Hideaki IKEDA ,  Takeru KINOSHITA ,  Junji MURAKAWA

IPC: G03G15/08 ,  G03G15/09

Abstract: A developing device, includes: a developing sleeve supported rotatably, the developing sleeve having a hollow, substantially cylindrical shape; a magnet part having a substantially columnar shape, the magnet part having magnetic poles disposed side by side around an axis, the magnet part being disposed substantially coaxially with the developing sleeve inside the developing sleeve; a rod fastened to the magnet part, the rod extending from one end in an extending direction of the axis of the magnet part, the rod being pulled out from one axial end of the developing sleeve; and a holder attached to a portion of the rod pulled out from the developing sleeve, the holder being fastened to a fastening target, the holder maintaining the rod, the holder regulating rotation of the magnet part, wherein adjustment of the holder in fastening position enables disposition and holding of the rod at an optional position.

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：US20160070206A1

公开(公告)日：2016-03-10

申请号：US14820997

申请日：2015-08-07

Applicant: KONICA MINOLTA, INC.

Inventor： Futoshi OKAZAKI

IPC: G03G15/08

CPC classification number: G03G15/0891 ,  G03G15/0893

Abstract: A developing device has a first circulation tank and a second circulation tank. A developer is conveyed from the first circulation tank to the second circulation tank through a first opening, while the developer is partly discharged through an outlet. The developer conveyed to the second circulation tank is conveyed back in the first circulation tank via a second opening. A first screw provided in the first circulation tank has a first vane, which exerts a force in a conveying direction of the first circulation path, in a first portion upstream from the first opening with respect to the conveying direction. The first screw has no vanes in a second portion near the first opening. The first screw has a second vane, which exerts a force in a direction opposite to the conveying direction, in a third portion adjacently downstream from the second portion. The outlet is located at a point of the first circulation tank, downstream from the second vane. A portion of the first circulation tank downstream from the second vane is not connected to the second circulation tank in a direction perpendicular to the conveying direction.

Abstract translation: 显影装置具有第一循环罐和第二循环罐。 显影剂通过第一开口从第一循环罐输送到第二循环罐，而显影剂通过出口部分地排出。 传送到第二循环罐的显影剂经由第二开口在第一循环槽中回送。 设置在第一循环罐中的第一螺杆具有第一叶片，其在相对于输送方向从第一开口的上游的第一部分沿第一循环路径的输送方向施加力。 第一螺钉在第一开口附近的第二部分中没有叶片。 第一螺杆具有在与第二部分相邻的第三部分中沿与输送方向相反的方向施加力的第二叶片。 出口位于第一循环罐的位于第二叶片下游的点处。 在第二叶片下游的第一循环罐的一部分在与输送方向垂直的方向上未连接到第二循环罐。

公开(公告)号：US20230111322A1

公开(公告)日：2023-04-13

申请号：US17894436

申请日：2022-08-24

Applicant: KONICA MINOLTA, INC.

Inventor： Futoshi OKAZAKI

IPC: G03G15/06

Abstract: An image forming device including an image carrier, a charge device, a developer device, power supply circuitry that applies a charge bias and a developer bias to the charge device and the developer device, respectively, a detector, and a hardware processor that operates as: a control unit that changes a fogging margin, which is a difference between charge bias and developer bias, and controls the power supply circuitry to set the charge bias and developer bias accordingly; a calculation unit that calculates amounts of change between detected values; and a determination unit that obtains differences between amounts of change, determines whether each difference is less than a defined value, and determines a position of a boundary between a first range greater than or equal to the defined value and a second range less than the defined value as a fogging margin to be used in forming a print image.

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.