Patents by Inventor Kazuteru Ishizuka

Kazuteru Ishizuka has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10635024
    Abstract: There is provided a developing device for developing an electrostatic latent image formed on a photoreceptor with a developer to form an image, including: a developing container that contains the developer; and a developing roller that faces the photoreceptor, is arranged adjacent to the developing container, and conveys the developer contained in the developing container to the photoreceptor, wherein the developing roller includes a magnetic pole forming part to be formed with a plurality of magnetic poles along a circumferential direction of the developing roller, at least a catch pole is formed as one of the plurality of magnetic poles, and in the catch pole, an amount of a total magnetic charge in an axial direction of the developing roller is kept constant, and a part of magnetic flux density distribution is different from another part of magnetic flux density distribution along the axial direction of the developing roller.
    Type: Grant
    Filed: November 21, 2018
    Date of Patent: April 28, 2020
    Assignee: Konica Minolta, Inc.
    Inventors: Kazuteru Ishizuka, Hiroyuki Saito, Shunichi Takaya, Kei Okamura, Aiko Kubota
  • Patent number: 10558141
    Abstract: An image forming apparatus includes: a developer casing that accommodates a developer; a 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.
    Type: Grant
    Filed: November 29, 2018
    Date of Patent: February 11, 2020
    Assignee: KONICA MINOLTA, INC.
    Inventors: Aiko Kubota, Hiroyuki Saito, Shunichi Takaya, Kazuteru Ishizuka, Kei Okamura
  • Publication number: 20190332034
    Abstract: A developing apparatus includes: a developer carrying body that carries a developer and is rotationally driven; a developer stirring member that is rotationally driven and thereby stirs the developer and conveys the developer to the developer carrying body; and a developer recovery member that is rotationally driven and thereby returns and recovers the developer stripped from the developer carrying body after development of the electrostatic latent image, to the developer stirring member, wherein a driving speed of the developer stirring member and a driving speed of the developer recovery member are independently controllable from each other.
    Type: Application
    Filed: April 5, 2019
    Publication date: October 31, 2019
    Inventors: Kei OKAMURA, Hiroyuki SAITO, Shunichi TAKAYA, Kazuteru ISHIZUKA, Aiko KUBOTA
  • Patent number: 10437173
    Abstract: A developing device includes a developing agent carrier body that carries a developing agent; a supplier that has a plurality of movement areas for moving the developing agent and that supplies the developing agent to the developing agent carrier body; a confluence path that combines the developing agent moving in each of the plurality of movement areas and thereafter returns the developing agent to the plurality of movement areas; and a mixing member that mixes the developing agent entered in the confluence path.
    Type: Grant
    Filed: May 11, 2018
    Date of Patent: October 8, 2019
    Assignee: Konica Minolta, Inc.
    Inventors: Kazuteru Ishizuka, Hideaki Tanaka, Shunichi Takaya, Shota Sakurai, Kei Okamura, Kei Yuasa
  • Publication number: 20190212671
    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.
    Type: Application
    Filed: November 29, 2018
    Publication date: July 11, 2019
    Inventors: Aiko KUBOTA, Hiroyuki SAITO, Shunichi TAKAYA, Kazuteru ISHIZUKA, Kei OKAMURA
  • Patent number: 10338494
    Abstract: A developing apparatus includes a developer carrier that carries a developer, and a developer casing that contains the developer to be supplied to the developer carrier. An opening/closing part is capable of controlling a moving amount of the developer between a first region on one side in an axial direction of the developer carrier and a second region on the other side in the axial direction of the developer carrier by opening or closing the first region and the second region. A hardware processor controls an open/closed state of the opening/closing part in accordance with the state of the developer in the first region and the second region.
    Type: Grant
    Filed: September 5, 2017
    Date of Patent: July 2, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventors: Shunichi Takaya, Hideaki Tanaka, Kazuteru Ishizuka, Shota Sakurai, Kei Okamura, Kei Yuasa
  • Publication number: 20190163094
    Abstract: There is provided a developing device for developing an electrostatic latent image formed on a photoreceptor with a developer to form an image, including: a developing container that contains the developer; and a developing roller that faces the photoreceptor, is arranged adjacent to the developing container, and conveys the developer contained in the developing container to the photoreceptor, wherein the developing roller includes a magnetic pole forming part to be formed with a plurality of magnetic poles along a circumferential direction of the developing roller, at least a catch pole is formed as one of the plurality of magnetic poles, and in the catch pole, an amount of a total magnetic charge in an axial direction of the developing roller is kept constant, and a part of magnetic flux density distribution is different from another part of magnetic flux density distribution along the axial direction of the developing roller.
    Type: Application
    Filed: November 21, 2018
    Publication date: May 30, 2019
    Applicant: KONICA MINOLTA, INC.
    Inventors: Kazuteru ISHIZUKA, Hiroyuki SAITO, Shunichi TAKAYA, Kei OKAMURA, Aiko KUBOTA
  • Patent number: 10296271
    Abstract: An image forming apparatus includes: a determination section configured to determine whether there is a possibility of generation of an image defect during a printing job for image formation on a plurality of pages based on image data included in the printing job; and a changing section configured to change an order of the pages to be subjected to image formation such that an image defect is not generated when the determination section determines that there is a possibility of generation of the image defect.
    Type: Grant
    Filed: May 1, 2017
    Date of Patent: May 21, 2019
    Assignee: Konica Minolta, Inc.
    Inventors: Wataru Watanabe, Shota Sakurai, Tatsuya Furuta, Kazuteru Ishizuka, Hiroshi Morimoto
  • Patent number: 10241444
    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.
    Type: Grant
    Filed: October 10, 2017
    Date of Patent: March 26, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventors: Kei Okamura, Shunichi Takaya, Hideaki Tanaka, Kazuteru Ishizuka, Shota Sakurai, Kei Yuasa
  • Patent number: 10203630
    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.
    Type: Grant
    Filed: February 26, 2018
    Date of Patent: February 12, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventors: Kei Yuasa, Shunichi Takaya, Hideaki Tanaka, Kazuteru Ishizuka, Shota Sakurai, Kei Okamura
  • Patent number: 10197951
    Abstract: An image forming apparatus includes: a conveyance section configured to convey a sheet in a direction opposite to a first conveyance direction during image formation, the direction being a second conveyance direction; and a distortion correction section disposed on an upstream side of a transfer nip in the first conveyance direction and configured to correct, when the sheet is conveyed by the conveyance section in the second conveyance direction, distortion of the sheet generated when the sheet passes through a fixing nip.
    Type: Grant
    Filed: December 7, 2016
    Date of Patent: February 5, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventors: Shota Sakurai, Hiroshi Morimoto, Wataru Watanabe, Kazuteru Ishizuka, Tatsuya Furuta
  • Patent number: 10139755
    Abstract: A developing device includes: a plurality of development sections arranged in an axis direction of a developer bearing member; a communication section disposed at a boundary of adjacent two development sections of the development sections, and configured to communicate between the two development sections; and a control section configured to perform an operation of moving the developer between the two development sections through the communication section to equalize degradation states of the developer in the two development sections.
    Type: Grant
    Filed: July 13, 2017
    Date of Patent: November 27, 2018
    Assignee: KONICA MINOLTA, INC.
    Inventors: Shota Sakurai, Shunichi Takaya, Kei Okamura, Hideaki Tanaka, Kazuteru Ishizuka, Kei Yuasa
  • Publication number: 20180335727
    Abstract: A developing device includes a developing agent carrier body that carries a developing agent; a supplier that has a plurality of movement areas for moving the developing agent and that supplies the developing agent to the developing agent carrier body; a confluence path that combines the developing agent moving in each of the plurality of movement areas and thereafter returns the developing agent to the plurality of movement areas; and a mixing member that mixes the developing agent entered in the confluence path.
    Type: Application
    Filed: May 11, 2018
    Publication date: November 22, 2018
    Applicant: Konica Minolta, Inc.
    Inventors: Kazuteru Ishizuka, Hideaki Tanaka, Shunichi Takaya, Shota Sakurai, Kei Okamura, Kei Yuasa
  • Publication number: 20180284644
    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.
    Type: Application
    Filed: February 26, 2018
    Publication date: October 4, 2018
    Applicant: KONICA MINOLTA, INC.
    Inventors: Kei YUASA, Shunichi TAKAYA, Hideaki TANAKA, Kazuteru ISHIZUKA, Shota SAKURAI, Kei OKAMURA
  • Patent number: 10088779
    Abstract: A developing device includes a developing roller which includes: a magnet roller having a plurality of magnetic poles in a circumferential direction; and a developing sleeve rotatably supported along an outer peripheral surface of the magnet roller, and which is configured to supply a toner to an image bearing member. The magnet roller is configured so that the relative position thereof to the developing sleeve is changeable.
    Type: Grant
    Filed: June 27, 2017
    Date of Patent: October 2, 2018
    Assignee: KONICA MINOLTA, INC.
    Inventors: Kazuteru Ishizuka, Tatsuya Furuta, Hiroshi Morimoto
  • Patent number: 9964897
    Abstract: A developing device includes a first developing roller, a second developing roller, a first end portion configured to restrict the amount of developer on the second developing roller, a restriction member, and a collecting roller configured to collect developer on the first developing roller. The second end portion is located at a position where magnetic force interference with a magnetic force generated by the second developing roller and the collecting roller is not caused.
    Type: Grant
    Filed: June 9, 2017
    Date of Patent: May 8, 2018
    Assignee: KONICA MINOLTA, INC.
    Inventors: Kazuteru Ishizuka, Hiroshi Morimoto, Wataru Watanabe, Tatsuya Furuta, Shota Sakurai
  • Publication number: 20180107137
    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.
    Type: Application
    Filed: October 10, 2017
    Publication date: April 19, 2018
    Applicant: Konica Minolta, Inc.
    Inventors: Kei OKAMURA, Shunichi TAKAYA, Hideaki TANAKA, Kazuteru ISHIZUKA, Shota SAKURAI, Kei YUASA
  • Publication number: 20180067418
    Abstract: A developing apparatus includes: a developer carrier that carries a developer; a developer casing that contains the developer to be supplied to the developer carrier; an opening/closing part capable of controlling a moving amount of the developer between a first region on one side in an axial direction of the developer carrier and a second region on the other side in the axial direction of the developer carrier by opening or closing the first region and the second region; and a hardware processor that controls an open/closed state of the opening/closing part in accordance with the state of the developer in the first region and the second region.
    Type: Application
    Filed: September 5, 2017
    Publication date: March 8, 2018
    Inventors: Shunichi TAKAYA, Hideaki TANAKA, Kazuteru ISHIZUKA, Shota SAKURAI, Kei OKAMURA, Kei YUASA
  • Publication number: 20180059578
    Abstract: A developing device includes: a plurality of development sections arranged in an axis direction of a developer bearing member; a communication section disposed at a boundary of adjacent two development sections of the development sections, and configured to communicate between the two development sections; and a control section configured to perform an operation of moving the developer between the two development sections through the communication section to equalize degradation states of the developer in the two development sections.
    Type: Application
    Filed: July 13, 2017
    Publication date: March 1, 2018
    Inventors: Shota SAKURAI, Shunichi TAKAYA, Kei OKAMURA, Hideaki TANAKA, Kazuteru ISHIZUKA, Kei YUASA
  • Patent number: 9869942
    Abstract: An imaging apparatus including: an electrophotographic photoreceptor; a charging unit to charge the surface of the electrophotographic photoreceptor; an exposing unit to perform exposure of the electrophotographic photoreceptor charged by the charging unit; a developing unit to feed a toner to the electrophotographic photoreceptor exposed by the exposing unit to form a toner image; a transfer unit to transfer the toner image formed on the electrophotographic photoreceptor; a lubricant feeding unit to feed a lubricant onto the surface of the electrophotographic photoreceptor; and a cleaning unit to remove the residual toner on the surface of the electrophotographic photoreceptor, wherein the electrophotographic photoreceptor includes a conductive support, a photoreceptive layer, and a protective layer disposed in sequence, the protective layer includes a resin containing a particulate P-type semiconductor, and the protective layer has a surface roughness Rz of 0.030 ?m or more and 0.075 ?m or less.
    Type: Grant
    Filed: March 25, 2016
    Date of Patent: January 16, 2018
    Assignee: KONICA MINOLTA, INC.
    Inventors: Toshiyuki Fujita, Keiichi Inagaki, Kazuteru Ishizuka, Mari Ueda, Daisuke Kodama