Patents by Inventor Kenta Matsuzaki

Kenta Matsuzaki 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: 11009815
    Abstract: An image forming apparatus includes an image bearing member, a transfer roller, an electric energy supply member, a voltage source, a detector, and a controller for adjusting a transfer voltage. A circumferential length 2K of the transfer roller and a distance k measured along an outer periphery of the transfer roller from the electric energy supplying member to the transfer roller satisfy 0.8K?k?1.2K. The controller controls the voltage source so as to satisfy 0.7T?t?1.3T, where 2T is time required for one full rotation of the transfer roller, and t is time during which the voltage source supplies the test current or the test voltage per one level in the operation of a setting mode.
    Type: Grant
    Filed: December 20, 2019
    Date of Patent: May 18, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kenta Matsuzaki, Shozo Aiba, Tomohiro Saito
  • Patent number: 10998543
    Abstract: A roll electrode is provided with a core, an electrode, a fixing part and a regulating part. The core extends in an axial direction and has a substantially circular outer circumference. The electrode has an expansion coefficient lower than that of the core. The electrode wound into a roll shape on the outer circumference of the core. The fixing part is fixed to an end portion from which the electrode starts being wound around the core. The regulating part regulates the axial movement of the electrode wound into the roll shape with respect to the core.
    Type: Grant
    Filed: October 29, 2018
    Date of Patent: May 4, 2021
    Assignee: Envision AESC Japan Ltd.
    Inventors: Masanobu Sato, Tsuyoshi Kudo, Ikuma Matsuzaki, Yusuke Sasaki, Kazuki Miyatake, Kenta Uwai, Yuta Sadakata, Shigeo Komatsu, Fumihiro Miki
  • Publication number: 20200209785
    Abstract: An image forming apparatus includes an image bearing member 7, a transfer roller 8, an electric energy supply member 9, a voltage source E2, a detecting means 32 a controlling means 50 for adjusting a transfer voltage. A circumferential length 2K of the transfer roller, and a distance k measured along an outer periphery of the transfer roller from the electric energy supplying portion to the transfer portion satisfy 0.8K?k?1.2K. The controller controls the voltage source so as to satisfy 0.7T?t?1.3T, where 2T is time required for one full rotation of the transfer roller, and t is time during which the voltage source supplies in the test current or the test voltage per one level in the operation of the setting mode.
    Type: Application
    Filed: December 20, 2019
    Publication date: July 2, 2020
    Inventors: Kenta Matsuzaki, Shozo Aiba, Tomohiro Saito
  • Patent number: 10698346
    Abstract: An idler roller as at least one of a plurality of support rollers for stretching an intermediate transfer belt is a metal roller having a groove formed on a metal surface. A primary transfer roller is a metal roller having a metal surface with a smaller maximum surface height than the idler roller.
    Type: Grant
    Filed: March 26, 2018
    Date of Patent: June 30, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventor: Kenta Matsuzaki
  • Publication number: 20200192251
    Abstract: An image forming apparatus includes a photosensitive member, a rotatable intermediate transfer belt configured to come into contact with a photosensitive member at a first contact portion on an outer peripheral surface thereof, and, a transfer member configured to come into contact with an inner peripheral surface of the intermediate transfer belt at a second contact portion. The transfer member is disposed such that an upstream end of the second contact portion is positioned downstream of a downstream end of the first contact portion in the rotation direction of the intermediate transfer belt. In a case where a surface resistivity measured on the outer peripheral surface of the intermediate transfer belt is G and a surface resistivity measured on the inner peripheral surface of the intermediate transfer belt is N, 0.75?N/G?1.2 is satisfied.
    Type: Application
    Filed: December 4, 2019
    Publication date: June 18, 2020
    Inventors: Tomohiro Saito, Kenta Matsuzaki, Shozo Aiba
  • Publication number: 20180284654
    Abstract: An idler roller as at least one of a plurality of support rollers for stretching an intermediate transfer belt is a metal roller having a groove formed on a metal surface. A primary transfer roller is a metal roller having a metal surface with a smaller maximum surface height than the idler roller.
    Type: Application
    Filed: March 26, 2018
    Publication date: October 4, 2018
    Inventor: Kenta Matsuzaki
  • Publication number: 20170351200
    Abstract: A power supply is configured to apply voltage to a power feed roller. An elastic blade of a roller cleaning unit clean a surface of the power feed roller at a position different from an abutting position of the power feed roller and a secondary transfer outer roller. A control unit is configured to execute a secondary transfer cleaning mode at a timing when a transfer of a toner image in a secondary transfer portion is not performed. In the secondary transfer cleaning mode, a voltage of only one of the positive and negative polarities is applied to the power feed roller while the secondary transfer outer roller and the power feed roller are rotated.
    Type: Application
    Filed: May 23, 2017
    Publication date: December 7, 2017
    Inventor: Kenta Matsuzaki
  • Patent number: 9280100
    Abstract: An image forming apparatus, which is capable of suitably preventing a separating discharge phenomenon from occurring at a fixing entrance guide for guiding a recording material to a fixing device, includes a control portion for controlling a transfer bias voltage and a separation bias voltage. A transfer roller transfers a toner image from a surface of a photosensitive drum onto a sheet at a transfer nip portion, and the control portion changes the transfer bias voltage applied to the transfer roller and the separation bias voltage applied to a charge eliminating needle to have larger voltage values before a trailing edge of the sheet, which is conveyed to the transfer nip portion and is subjected to transfer, passes through the transfer nip portion.
    Type: Grant
    Filed: December 23, 2014
    Date of Patent: March 8, 2016
    Assignee: Canon Finetech Inc.
    Inventor: Kenta Matsuzaki
  • Publication number: 20150185668
    Abstract: An image forming apparatus, which is capable of suitably preventing a separating discharge phenomenon from occurring at a fixing entrance guide for guiding a recording material to a fixing device, includes a control portion for controlling a transfer bias voltage and a separation bias voltage. A transfer roller transfers a toner image from a surface of a photosensitive drum onto a sheet at a transfer nip portion, and the control portion changes the transfer bias voltage applied to the transfer roller and the separation bias voltage applied to a charge eliminating needle to have larger voltage values before a trailing edge of the sheet, which is conveyed to the transfer nip portion and being subjected to transfer, passes through the transfer nip portion.
    Type: Application
    Filed: December 23, 2014
    Publication date: July 2, 2015
    Inventor: Kenta Matsuzaki