公开(公告)号：US20220121136A1

公开(公告)日：2022-04-21

申请号：US17483695

申请日：2021-09-23

Applicant: Konica Minolta, Inc.

Inventor： Wataru WATANABE ,  Shunichi TAKAYA ,  Hokuto HATANO

IPC: G03G15/02 ,  G03G15/08

Abstract: An image forming apparatus includes an image carrier; an exposure device which draws an electrostatic latent image on the image carrier; a developer which uses a developing roller facing the image carrier to supply a developing agent to the electrostatic latent image formed on the image carrier and to develop a toner image; a developing current detector which detects a developing current flowing between the image carrier and the developing roller during developing by the developer; and a controller which controls the above. The controller performs forced toner discharge control in which a predetermined toner image is developed on the image carrier by the developer and the toner is forcibly discharged from the developer. The controller controls a toner discharge amount in the forced toner discharge control based on a current value detected by the developing current detector.

公开(公告)号：US20160320742A1

公开(公告)日：2016-11-03

申请号：US15099061

申请日：2016-04-14

Applicant: Konica Minolta, Inc.

Inventor： Takeshi ISHIDA ,  Hokuto HATANO

IPC: G03G21/00

CPC classification number: G03G21/0094

Abstract: An image forming apparatus includes a photoreceptor, a charging unit, an exposing unit, a developing unit, a transfer unit, a lubricant supply unit, a cleaning unit and a lubricant removal unit. The lubricant supply unit supplies a lubricant to a surface of the photoreceptor and is disposed at a point which is an upstream side of the cleaning unit and a downstream side of the developing unit in a rotation direction of the photoreceptor. The lubricant removal unit removes the lubricant from the surface of the photoreceptor and is disposed at a point which is the downstream side of the cleaning unit and the upstream side of the developing unit in the rotation direction of the photoreceptor.

Abstract translation: 图像形成装置包括感光体，充电单元，曝光单元，显影单元，转印单元，润滑剂供应单元，清洁单元和润滑剂去除单元。 润滑剂供给单元向感光体的表面供给润滑剂，并且在感光体的旋转方向上设置在作为清洁单元的上游侧的点和显影单元的下游侧。 润滑剂去除单元从感光体的表面去除润滑剂，并且设置在清洁单元的下游侧和显影单元的上游侧的感光体的旋转方向上。

公开(公告)号：US20240118649A1

公开(公告)日：2024-04-11

申请号：US18479907

申请日：2023-10-03

Applicant: Konica Minolta, Inc.

Inventor： Hokuto HATANO ,  Shunichi TAKAYA ,  Kazuhiro SAITO

IPC: G03G15/20 ,  G01J3/50

CPC classification number: G03G15/2025 ,  G01J3/501

Abstract: An image forming apparatus includes: an image carrier; a solid lubricant; a lubricant application member that scrapes off the solid lubricant and applies the scraped solid lubricant to a surface of the image carrier; a colorimeter that performs colorimetry of a colorimetric surface of the solid lubricant; and a hardware processor that sets a lubricant application condition such that a predetermined amount of lubricant is applied on the basis of a colorimetric result obtained by the colorimeter.

公开(公告)号：US20180253024A1

公开(公告)日：2018-09-06

申请号：US15876355

申请日：2018-01-22

Applicant: KONICA MINOLTA, INC.

Inventor： Hokuto HATANO

IPC: G03G15/02

CPC classification number: G03G15/0233

Abstract: A charging device is configured to apply electric charge to an image carrier provided outside the charging device. The charging device includes: a cored bar member; and a conductive resin layer provided on a surface of the cored bar member. The conductive resin layer has a film thickness of 200 μm or less. Filtered maximum waviness in an axial direction of the cored bar member is 8 μm or less in a range of a reference length of 60 μm.

公开(公告)号：US20190187580A1

公开(公告)日：2019-06-20

申请号：US16212665

申请日：2018-12-06

Applicant: KONICA MINOLTA, INC.

Inventor： Tsugihito YOSHIYAMA ,  Hokuto HATANO

IPC: G03G15/02 ,  G03G15/00

CPC classification number: G03G15/0233 ,  G03G15/0266 ,  G03G15/5004 ,  G03G15/5037 ,  G03G15/553 ,  G03G15/80

Abstract: An image forming apparatus includes: an image carrier; a charging roller that charges the image carrier; a power supply part that applies a charging voltage to the charging roller; a current measurement part that measures a value of a DC component of a current flowing between the image carrier and the charging roller at at least two timings having mutually different elapsed times; and a hardware processor that measures an elapsed time from a start of application of the charging voltage by the power supply part, calculates a coefficient of an approximate expression indicating a relationship between the value of the DC component of the current flowing between the image carrier and the charging roller, and the elapsed time, and performs judgment related to life of the charging roller on the basis of the coefficient and a predetermined threshold.

公开(公告)号：US20150253720A1

公开(公告)日：2015-09-10

申请号：US14641891

申请日：2015-03-09

Applicant: Konica Minolta, Inc.

Inventor： Kazunori KURIMOTO ,  Masahiko KURACHI ,  Takeshi ISHIDA ,  Hokuto HATANO

IPC: G03G15/00

CPC classification number: G03G21/0005 ,  G03G5/14704 ,  G03G5/14734 ,  G03G5/14769 ,  G03G5/14773 ,  G03G5/14791 ,  G03G15/75

Abstract: An image forming apparatus includes an electrophotographic photoreceptor, a proximity-type charging unit to negatively charge the surface of the photoreceptor, an exposing unit to form an electrostatic latent image on the surface of the photoreceptor, a developing unit to develop the electrostatic latent image with a toner to form a toner image, a transferring unit to transfer the toner image onto a transfer medium, a fixing unit to fix the transferred toner image on the transfer medium, and a cleaning unit to remove residual toner on the photoreceptor. The photoreceptor comprises a conductive support, a photosensitive layer formed over the conductive support, and a protective layer formed over the photosensitive layer. The protective layer of the photoreceptor contains a binder resin, a particulate P-type semiconductor, and a particulate cross-linked resin composed of an insulating cross-linked polymer.

Abstract translation: 图像形成装置包括电子照相感光体，对感光体的表面负电荷的接近型充电单元，在感光体的表面上形成静电潜像的曝光单元，显影单元，使静电潜像显影， 用于形成调色剂图像的调色剂，将调色剂图像转印到转印介质上的转印单元，将转印的调色剂图像固定在转印介质上的定影单元，以及清除感光体上的残留调色剂的清洁单元。 感光体包括导电支撑体，形成在导电支撑体上的感光层，以及形成在感光层上的保护层。 感光体的保护层含有粘合剂树脂，粒状P型半导体以及由绝缘性交联聚合物构成的粒状交联树脂。

公开(公告)号：US20150099217A1

公开(公告)日：2015-04-09

申请号：US14499900

申请日：2014-09-29

Applicant: Konica Minolta, Inc.

Inventor： Hokuto HATANO ,  Kazunori Kurimoto ,  Seisuke Maeda ,  Hiroki Takao

IPC: G03G15/00 ,  G03G21/00

CPC classification number: G03G5/0575 ,  G03G5/0507 ,  G03G5/0542 ,  G03G5/0546 ,  G03G5/0592 ,  G03G5/14704 ,  G03G5/14708 ,  G03G5/14734 ,  G03G5/14769 ,  G03G5/14791

Abstract: Disclosed is an electrophotographic photoreceptor including a conductive support, a photosensitive layer on the conductive support and a surface layer on the photosensitive layer. The surface layer includes a cured resin prepared by polymerization of a compound having two or more radically polymerizable functional groups per molecule, the cured resin containing an organic resin fine particle and a metal oxide fine particle, and the organic resin fine particle comprising a resin containing a structural unit derived from at least one of melamine and benzoguanamine, the organic resin fine particle having a number average primary particle size of 0.01 to 3.00 μm.

Abstract translation: 公开了一种电子照相感光体，其包括导电性载体，导电性载体上的感光层和感光层上的表面层。 表面层包括通过每分子具有两个或更多个可自由基聚合的官能团的化合物聚合制备的固化树脂，含有有机树脂细颗粒和金属氧化物细颗粒的固化树脂，以及包含含有 衍生自三聚氰胺和苯并胍胺中的至少一种的结构单元，所述有机树脂微粒的初级粒子数为0.01〜3.00μm。