公开(公告)号：US20210302859A1

公开(公告)日：2021-09-30

申请号：US17210901

申请日：2021-03-24

Applicant: KYOCERA Document Solutions Inc.

Inventor： Kazunori TANAKA ,  Yoshihiro YAMAGISHI ,  Tamotsu SHIMIZU

IPC: G03G15/02 ,  G03G15/00

Abstract: An image forming apparatus includes: a development device which develops an electrostatic latent image formed on a photosensitive drum into a toner image; a charger which charges the photosensitive drum; a development power supply which applies a prescribed bias voltage to the development device; and a calculating section which calculates a surface potential of the photosensitive drum based on a development current flowing in the development device. The calculating section calculates, as the surface potential, a bias voltage at which a non-charging development current that flows in the development device in an uncharged state in which the charger has not charged the photosensitive drum is equal to a charging development current that flows in the development device in a charged state in which the charger has charged the photosensitive drum.

公开(公告)号：US20210016564A1

公开(公告)日：2021-01-21

申请号：US16931065

申请日：2020-07-16

Applicant: KYOCERA Document Solutions Inc.

Inventor： Yoshihiro YAMAGISHI ,  Kanako MORIMOTO ,  Ryota OKUI ,  Satoshi ISHII

IPC: B41J2/045

Abstract: An image forming apparatus includes a recording head, a controller, a first detector, and a second detector. The controller calculates a viscosity of ink in each of nozzles based on a temperature, a humidity, and an elapsed time. The controller determines, among the nozzles, a nozzle in which the viscosity is equal to or higher than a threshold to be a high-viscosity nozzle. The controller acquires non-ejection information indicating an ejection disabled nozzle that is disabled to eject the ink. The controller acquires a viscosity of the ink in the ejection disabled nozzle. The controller calculates an average value of viscosities of the ink in the plurality of nozzles. The controller compares the viscosity of the ink in the ejection disabled nozzle with the average value of the viscosities of the ink in the nozzles. The controller determines whether or not to change a contribution value based on a comparison result.

公开(公告)号：US20190265627A1

公开(公告)日：2019-08-29

申请号：US16235078

申请日：2018-12-28

Applicant: KYOCERA Document Solutions Inc.

Inventor： Yuta KITABAYASHI ,  Yoshihiro YAMAGISHI ,  Kenichi KASAMA ,  Koji UNO ,  Nobuyuki HAYASHI

IPC: G03G15/00 ,  G03G15/20

Abstract: An image forming apparatus has an image forming portion, a fixing device, a temperature sensing device, and a control portion. The fixing device has a fixing member having a heated rotary member and a pressing member forming a fixing nip by making contact with the heated rotary member. The temperature sensing device senses the surface temperature of at least one of the heated rotary member and the pressing member in a plurality of regions in the axial direction. The control portion estimates the thickness distribution of the surface layer of at least one of the heated rotary member and the pressing member in the axial direction based on the time taken for the surface temperature in the plurality of regions to reach the predetermined temperature, and thereby estimates the lifetime of at least one of the heated rotary member or the pressing member based on the estimated thickness distribution.

公开(公告)号：US20180335748A1

公开(公告)日：2018-11-22

申请号：US15953039

申请日：2018-04-13

Applicant: KYOCERA Document Solutions Inc.

Inventor： Tamotsu SHIMIZU ,  Yoshihiro YAMAGISHI ,  Akifumi YAMAGUCHI ,  Koji UNO ,  Kenichi KASAMA ,  Yuta KITABAYASHI ,  Nobuyuki HAYASHI

IPC: G03G15/00 ,  G03G5/147 ,  G03G5/00

CPC classification number: G03G21/0058 ,  G03G5/005 ,  G03G5/14704 ,  G03G15/0865 ,  G03G15/5008 ,  G03G15/5037 ,  G03G15/55 ,  G03G15/751 ,  G03G21/0011 ,  G03G21/0064 ,  G03G2221/0089

Abstract: An image forming apparatus has a photosensitive member, a charging member, an exposing device, a developing device, a transfer member, a polishing member, a driving device, a voltage applying device, a torque detector, and a control portion. The photosensitive member has a photosensitive layer and a surface protection layer formed on the surface of the photosensitive layer. The polishing member has an elastic layer on its circumferential surface, and rotates with a linear velocity difference from that of the photosensitive member. The torque detector detects the torque of the driving device. The control portion estimates an attachment condition of discharge products to the surface of the photosensitive member based on the torque of the driving device detected by the torque detector. When the torque is equal to or higher than a predetermined value, the control portion performs an image degradation suppression process.

公开(公告)号：US20170017183A1

公开(公告)日：2017-01-19

申请号：US15208054

申请日：2016-07-12

Applicant: KYOCERA Document Solutions Inc.

Inventor： Kotatsu KAWAGUCHI ,  Yoshihiro YAMAGISHI ,  Takashi EIKI ,  Takefumi YOTSUTSUJI

IPC: G03G15/20

CPC classification number: G03G15/2053 ,  G03G2215/2035

Abstract: Provided is a fixing device including a pair of end deformation restraint members. A restraint body 35 of the end deformation restraint member has an insertion part 38 which is inserted into both end portions of a fixing belt, and restrains deformation of belt end portions by holding both end portions of the fixing belt, which slides on an outer peripheral surface of the insertion part 38, from inside in the insertion part 38. The insertion part 38 is continued in a belt rotation direction with no gap.

Abstract translation: 提供一种包括一对端部变形抑制构件的固定装置。 端部变形抑制构件的约束体35具有插入到定影带的两端部的插入部38，并且通过保持定影带的两端部在外周侧滑动来抑制带端部的变形 插入部38的表面从插入部38的内侧延伸。插入部38在皮带旋转方向上无间隙地继续。

公开(公告)号：US20160132008A1

公开(公告)日：2016-05-12

申请号：US14933567

申请日：2015-11-05

Applicant: KYOCERA Document Solutions Inc.

Inventor： Yoshihiro YAMAGISHI ,  Satoshi ISHII ,  Takashi EIKI ,  Takefumi YOTSUTSUJI

IPC: G03G15/20

CPC classification number: G03G15/2053 ,  G03G15/2064

Abstract: A fixing device includes a fixing belt, a pressuring member, a heat source, a pressing member and a first heating stop device. The fixing belt is provided to be rotatable around a rotation axis. The pressuring member is configured to be rotatable and to come into pressure contact with the fixing belt so as to form a fixing nip. The heat source is arranged at an inner diameter side of the fixing belt, provided at a position displaced from the rotation axis and configured to heat the fixing belt. The pressing member is configured to press the fixing belt to a side of the pressuring member. The first heating stop device is configured to face an outer circumferential face of a closest part to the heat source of the fixing belt and to operate at a first operating temperature so as to stop the heat source from heating the fixing belt.

Abstract translation: 定影装置包括定影带，加压构件，热源，按压构件和第一加热停止装置。 定影带设置成能够围绕旋转轴线旋转。 加压构件被构造成可旋转并与定影带压力接触以形成定影辊隙。 热源布置在定影带的内径侧，设置在从旋转轴线偏离的位置，并构造成加热定影带。 按压构件被构造成将定影带按压到加压构件的一侧。 第一加热停止装置被配置为面对与定影带的热源最接近的部分的外周面，并且在第一工作温度下操作，以便使热源停止加热定影带。

公开(公告)号：US20210302870A1

公开(公告)日：2021-09-30

申请号：US17210395

申请日：2021-03-23

Applicant: KYOCERA Document Solutions Inc.

Inventor： Kazunori TANAKA ,  Yoshihiro YAMAGISHI ,  Tamotsu SHIMIZU

IPC: G03G15/06

Abstract: An image forming apparatus includes: a development device that develops an electrostatic latent image formed on a photosensitive drum into a toner image; a charger that charges the photosensitive drum; a development power supply that applies a prescribed bias voltage to the development device; an electric current measuring section that measures a development current flowing in the development device; and a calculating section that calculates a surface potential of the photosensitive drum based on the development current. The development device sequentially forms a plurality of image formation toner images on respective sheets of a recording medium. The image formation toner images each are a toner image for image formation. The electric current measuring section measures the development current in a period during which the image formation toner images are not formed.

公开(公告)号：US20180059597A1

公开(公告)日：2018-03-01

申请号：US15672481

申请日：2017-08-09

Applicant: KYOCERA Document Solutions Inc.

Inventor： Yoshihiro YAMAGISHI ,  Takashi EIKI

IPC: G03G15/20

CPC classification number: G03G15/2039 ,  G03G15/2025 ,  G03G15/2032 ,  G03G15/2053 ,  G03G2215/2009 ,  G03G2215/2019 ,  G03G2215/2035

Abstract: A fixing device includes a fixing belt, a pressuring roller pressured to the fixing belt, a heat source heating the fixing belt, a pressing member pressing the fixing belt toward the pressuring roller's side, and a sliding contact sheet interposed between the fixing belt and the pressing member to hold lubricant. The sliding contact sheet includes a sliding contact portion arranged at the center in a sheet conveying direction to come into contact with the fixing belt, a first fixed portion arranged at an upstream side in the conveying direction and wound around the pressing member at the heat source's side, and a second fixed portion arranged at a downstream side in the conveying direction and wound around the pressing member at the heat source's side from the first fixed portion. The sliding contact sheet is configured so that the second fixed portion becomes smaller than the first fixed portion.

公开(公告)号：US20170090364A1

公开(公告)日：2017-03-30

申请号：US15271663

申请日：2016-09-21

Applicant: KYOCERA Document Solutions Inc.

Inventor： Takefumi YOTSUTSUJI ,  Yoshihiro YAMAGISHI ,  Takashi EIKI ,  Kotatsu KAWAGUCHI

IPC: G03G15/20

CPC classification number: G03G15/2039 ,  G03G15/2064

Abstract: A fixing device includes a heating body, a pressuring body, a temperature detecting part, a first frame supporting the heating body, a second frame supporting the pressuring body and a movement mechanism. The temperature detecting part has a detecting element detecting an infrared ray radiated from the heating body and detects temperature of the heating body by the detecting element. The first frame includes a heat interrupting member covering the heating body between the heating body and the temperature detecting part. The movement mechanism moves the first frame in an approaching direction or a separating direction from the second frame to establish the heating body and the pressuring body in a pressurization state or a depressurization state. The heat interrupting member includes an aperture elongated in a movement direction of the first frame to pass the infrared ray radiated from the heating body to the detecting element through the aperture.

公开(公告)号：US20170090363A1

公开(公告)日：2017-03-30

申请号：US15266242

申请日：2016-09-15

Applicant: KYOCERA Document Solutions Inc.

Inventor： Takefumi YOTSUTSUJI ,  Yoshihiro YAMAGISHI ,  Takashi EIKI ,  Kotatsu KAWAGUCHI

IPC: G03G15/20

CPC classification number: G03G15/2039

Abstract: A fixing device includes a heating body heated by a heat source, a pressuring body, a conversion temperature detecting part, a substrate temperature detecting part, a lens temperature detecting part, a conversion temperature correcting part and a controller. The conversion temperature detecting part has an infrared ray detecting element mounted to a substrate detecting an infrared ray from the heating body and a lens optically focusing the infrared ray onto the infrared ray detecting element. The conversion temperature detecting part detects conversion temperature of surface temperature of the heating body with detection result of the infrared ray detecting element. The substrate temperature detecting part detects substrate temperature. The lens temperature detecting part detects lens temperature. The conversion temperature correcting part corrects the conversion temperature with the substrate temperature and the lens temperature. The controller controls the heat source so that the conversion temperature becomes predetermined fixing control temperature.