Patents by Inventor Koujirou Izumidate

Koujirou Izumidate 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: 11762315
    Abstract: An image forming apparatus includes an intermediate transfer member. The intermediate transfer member includes a layer made of an acrylic copolymer. A plurality of grooves is formed in the layer along a moving direction of the intermediate transfer member across a width direction of the intermediate transfer member. A groove distance that is an average distance between adjoining grooves of the plurality of grooves in the width direction of the intermediate transfer member is 2 ?m or more and 10 ?m or less.
    Type: Grant
    Filed: October 8, 2021
    Date of Patent: September 19, 2023
    Assignee: Canon Kabushiki Kaisha
    Inventors: Ken Yokoyama, Shuji Saito, Koujirou Izumidate
  • Publication number: 20220026832
    Abstract: An image forming apparatus includes an intermediate transfer member. The intermediate transfer member includes a layer made of an acrylic copolymer. A plurality of grooves is formed in the layer along a moving direction of the intermediate transfer member across a width direction of the intermediate transfer member. A groove distance that is an average distance between adjoining grooves of the plurality of grooves in the width direction of the intermediate transfer member is 2 ?m or more and 10 ?m or less.
    Type: Application
    Filed: October 8, 2021
    Publication date: January 27, 2022
    Inventors: Ken Yokoyama, Shuji Saito, Koujirou Izumidate
  • Patent number: 11169472
    Abstract: An image forming apparatus includes an intermediate transfer member. The intermediate transfer member includes a layer made of an acrylic copolymer. A plurality of grooves is formed in the layer along a moving direction of the intermediate transfer member across a width direction of the intermediate transfer member. A groove distance that is an average distance between adjoining grooves of the plurality of grooves in the width direction of the intermediate transfer member is 2 ?m or more and 10 ?m or less.
    Type: Grant
    Filed: April 12, 2019
    Date of Patent: November 9, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventors: Ken Yokoyama, Shuji Saito, Koujirou Izumidate
  • Patent number: 11022922
    Abstract: An image forming apparatus including: a movable intermediate transfer member onto which a toner image borne by an image bearing member is to be transferred; a detection unit configured to irradiate the toner image on the intermediate transfer member with light to detect reflected light; and a control unit configured to adjust a condition for forming the toner image based on a detection result of the detection unit, wherein a plurality of grooves extending along a movement direction of the intermediate transfer member are formed in a surface of the intermediate transfer member in a width direction intersecting the movement direction, and wherein grooves, formed within a range of the intermediate transfer member to which the light is irradiated by the detection unit, among the plurality of grooves are formed so that intervals each between adjacent grooves with respect to the width direction are regularly changed within a predetermined range.
    Type: Grant
    Filed: June 15, 2020
    Date of Patent: June 1, 2021
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Shuji Saito, Seiji Nakahara, Ken Yokoyama, Hiroshi Kita, Koujirou Izumidate, Kazushi Ino
  • Patent number: 11009816
    Abstract: An endless-shaped electrophotographic belt with a cleaning blade provides improvement in transfer remaining toner wiping properties. The electrophotographic belt has an endless shape including, on an outer circumferential surface thereof, grooves and lands. The grooves extend in a circumferential direction of the belt and the lands are positioned between the grooves. The belt further has on the outer circumferential surface, one or more convex portion(s) between at least one of the grooves and one of the lands adjacent to the one of the grooves, and in a cross section of the belt in a direction orthogonal to a direction of which the grooves extend, the convex portion(s) projects more than the lands.
    Type: Grant
    Filed: April 13, 2020
    Date of Patent: May 18, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventors: Keisuke Ishizumi, Takayuki Tanaka, Koujirou Izumidate
  • Publication number: 20200401073
    Abstract: An image forming apparatus including: a movable intermediate transfer member onto which a toner image borne by an image bearing member is to be transferred; a detection unit configured to irradiate the toner image on the intermediate transfer member with light to detect reflected light; and a control unit configured to adjust a condition for forming the toner image based on a detection result of the detection unit, wherein a plurality of grooves extending along a movement direction of the intermediate transfer member are formed in a surface of the intermediate transfer member in a width direction intersecting the movement direction, and wherein grooves, formed within a range of the intermediate transfer member to which the light is irradiated by the detection unit, among the plurality of grooves are formed so that intervals each between adjacent grooves with respect to the width direction are regularly changed within a predetermined range.
    Type: Application
    Filed: June 15, 2020
    Publication date: December 24, 2020
    Inventors: Shuji Saito, Seiji Nakahara, Ken Yokoyama, Hiroshi Kita, Koujirou Izumidate, Kazushi Ino
  • Publication number: 20200341410
    Abstract: An endless-shaped electrophotographic belt with a cleaning blade provides improvement in transfer remaining toner wiping properties. The electrophotographic belt has an endless shape including, on an outer circumferential surface thereof, grooves and lands. The grooves extend in a circumferential direction of the belt and the lands are positioned between the grooves. The belt further has on the outer circumferential surface, one or more convex portion(s) between at least one of the grooves and one of the lands adjacent to the one of the grooves, and in a cross section of the belt in a direction orthogonal to a direction of which the grooves extend, the convex portion(s) projects more than the lands.
    Type: Application
    Filed: April 13, 2020
    Publication date: October 29, 2020
    Inventors: Keisuke Ishizumi, Takayuki Tanaka, Koujirou Izumidate
  • Patent number: 10551771
    Abstract: Provided is an electrophotographic belt sustainably excellent in toner removal performance. The electrophotographic belt has an endless shape and has grooves on an outer surface thereof, each of the grooves extending in a circumferential direction and being in non-parallel with the circumferential direction, and the outer surface is composed only of a first region in which the number of the grooves in a direction orthogonal to the circumferential direction is “n” and a second region in which the number of the grooves in the direction orthogonal to the circumferential direction is larger than the “n”, the first region and the second region being arranged alternately in the circumferential direction, and the “n” being an integer of 1 or more.
    Type: Grant
    Filed: April 8, 2019
    Date of Patent: February 4, 2020
    Assignee: CANON KABUSKIKI KAISHA
    Inventors: Kouichi Uchida, Koujirou Izumidate, Noriaki Egawa, Masatsugu Toyonori, Shuji Saito, Yasuhiro Matsuo, Takashi Endo, Kosuke Saito
  • Patent number: 10527972
    Abstract: An intermediate transfer belt includes, on a surface in contact with a photosensitive drum and a cleaning blade, a plurality of grooves formed along a moving direction of the intermediate transfer belt in a width direction which intersects the moving direction of the intermediate transfer belt. Further, the intermediate transfer belt includes a plurality of first regions in which adjacent grooves in the width direction are arranged at a predetermined interval, and a second region which is positioned between the plurality of first regions and in which an interval between adjacent grooves in the width direction is different from the predetermined interval. The second region is arranged outside, in the width direction of the intermediate transfer belt, a range in which a patch toner is to be formed in concentration correction.
    Type: Grant
    Filed: April 12, 2019
    Date of Patent: January 7, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shuji Saito, Ken Yokoyama, Noriaki Egawa, Koujirou Izumidate, Masatsugu Toyonori
  • Publication number: 20190332040
    Abstract: An image forming apparatus includes an intermediate transfer member. The intermediate transfer member includes a layer made of an acrylic copolymer. A plurality of grooves is formed in the layer along a moving direction of the intermediate transfer member across a width direction of the intermediate transfer member. A groove distance that is an average distance between adjoining grooves of the plurality of grooves in the width direction of the intermediate transfer member is 2 ?m or more and 10 ?m or less.
    Type: Application
    Filed: April 12, 2019
    Publication date: October 31, 2019
    Inventors: Ken Yokoyama, Shuji Saito, Koujirou Izumidate
  • Publication number: 20190332038
    Abstract: An intermediate transfer belt includes, on a surface in contact with a photosensitive drum and a cleaning blade, a plurality of grooves formed along a moving direction of the intermediate transfer belt in a width direction which intersects the moving direction of the intermediate transfer belt. Further, the intermediate transfer belt includes a plurality of first regions in which adjacent grooves in the width direction are arranged at a predetermined interval, and a second region which is positioned between the plurality of first regions and in which an interval between adjacent grooves in the width direction is different from the predetermined interval. The second region is arranged outside, in the width direction of the intermediate transfer belt, a range in which a patch toner is to be formed in concentration correction.
    Type: Application
    Filed: April 12, 2019
    Publication date: October 31, 2019
    Inventors: Shuji Saito, Ken Yokoyama, Noriaki Egawa, Koujirou Izumidate, Masatsugu Toyonori
  • Publication number: 20190324386
    Abstract: Provided is an electrophotographic belt sustainably excellent in toner removal performance. The electrophotographic belt has an endless shape and has grooves on an outer surface thereof, each of the grooves extending in a circumferential direction and being in non-parallel with the circumferential direction, and the outer surface is composed only of a first region in which the number of the grooves in a direction orthogonal to the circumferential direction is “n” and a second region in which the number of the grooves in the direction orthogonal to the circumferential direction is larger than the “n”, the first region and the second region being arranged alternately in the circumferential direction, and the “n” being an integer of 1 or more.
    Type: Application
    Filed: April 8, 2019
    Publication date: October 24, 2019
    Inventors: Kouichi Uchida, Koujirou Izumidate, Noriaki Egawa, Masatsugu Toyonori, Shuji Saito, Yasuhiro Matsuo, Takashi Endo, Kosuke Saito