Patents by Inventor Takeshi Shinji

Takeshi Shinji 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).

  • Publication number: 20200033774
    Abstract: A fixing apparatus includes a heating member, a supporting member that supports the heating member, a film slidably disposed on the heating member, and a pressing member that forms a nip portion, in collaboration with the film, through which the recording medium is conveyed. The fixing apparatus further includes a first thermally conductive member and a second thermally conductive member that are disposed between the heating member and the supporting member. The first thermally conductive member has a thermal conductivity higher than that of a substrate of the heating member. The thermal conductivity in in-plane directions of the second thermally conductive member is higher than the thermal conductivity in a thickness direction thereof. The second thermally conductive member is in contact with the heating member, and the first thermally conductive member is in contact with the second thermally conductive member.
    Type: Application
    Filed: July 18, 2019
    Publication date: January 30, 2020
    Inventors: Takeshi Shinji, Satoshi Nishida, Isamu Takeda
  • Patent number: 10503105
    Abstract: A tubular film used for a fixing apparatus includes a heat generating layer, and a first conductive layer and a second conductive layer respectively provided at one end and another end of the film in a longitudinal direction of the film so as to contact the heat generating layer. The first conductive layer and the second conductive layer each has a volume resistivity that is less than that of the heat generating layer. A low resistance layer is formed in an area of the heat generating layer between the first conductive layer and the second conductive layer in the longitudinal direction, so as not to contact the first conductive layer and the second conductive layer. The low resistance layer has a volume resistivity that is less than that of the heat generating layer, and extends in a circumferential direction of the heat generating layer.
    Type: Grant
    Filed: January 11, 2019
    Date of Patent: December 10, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toru Imaizumi, Ken Nakagawa, Takashi Narahara, Takeshi Shinji, Kazuhiro Doda, Kohei Wakatsu
  • Patent number: 10474074
    Abstract: A film for use in a fixing device includes a base layer having a cylindrical shape. An electrode portion is formed at an end part of the base layer in a longitudinal direction of the film. A heat generation portion is formed at a central part of the base layer in the longitudinal direction of the film and electrically connected to the electrode portion. The heat generation portion is formed of a conductive layer made of a same material as a material of the electrode portion. A thickness of the conductive layer is larger in the electrode portion than in the heat generation portion. A surface area of the conductive layer per unit length in the longitudinal direction of the film is larger in the electrode portion than in the heat generation portion.
    Type: Grant
    Filed: January 3, 2019
    Date of Patent: November 12, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takeshi Shinji, Takashi Narahara, Kazuhiro Doda, Yutaka Sato, Kohei Wakatsu
  • Publication number: 20190171145
    Abstract: A tubular film used for a fixing apparatus includes a heat generating layer, and a first conductive layer and a second conductive layer respectively provided at one end and another end of the film in a longitudinal direction of the film so as to contact the heat generating layer. The first conductive layer and the second conductive layer each has a volume resistivity that is less than that of the heat generating layer. A low resistance layer is formed in an area of the heat generating layer between the first conductive layer and the second conductive layer in the longitudinal direction, so as not to contact the first conductive layer and the second conductive layer. The low resistance layer has a volume resistivity that is less than that of the heat generating layer, and extends in a circumferential direction of the heat generating layer.
    Type: Application
    Filed: January 11, 2019
    Publication date: June 6, 2019
    Inventors: Toru Imaizumi, Ken Nakagawa, Takashi Narahara, Takeshi Shinji, Kazuhiro Doda, Kohei Wakatsu
  • Patent number: 10310424
    Abstract: A fixing device includes a cylindrical film including a heat generating layer and an electroconductive layer electrically connected with the heat generating layer. A volume resistivity of the electroconductive layer is less than a volume resistivity of the heat generating layer. The fixing device further includes an energizing member, a roller, a sliding member, and a supporting member. A thermal conductivity of the sliding member is greater than a thermal conductivity of the supporting member. A recording material on which a toner image is formed is heated while being fed through a nip. A longitudinal end of the sliding member is positioned between an inner end surface and an outer end surface of the electroconductive layer with respect to the longitudinal direction of the film.
    Type: Grant
    Filed: December 20, 2017
    Date of Patent: June 4, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Koji An, Takashi Narahara, Takeshi Shinji, Toru Imaizumi, Kazuhiro Doda, Kohei Wakatsu
  • Publication number: 20190137915
    Abstract: A film for use in a fixing device includes a base layer having a cylindrical shape. An electrode portion is formed at an end part of the base layer in a longitudinal direction of the film. A heat generation portion is formed at a central part of the base layer in the longitudinal direction of the film and electrically connected to the electrode portion. The heat generation portion is formed of a conductive layer made of a same material as a material of the electrode portion. A thickness of the conductive layer is larger in the electrode portion than in the heat generation portion. A surface area of the conductive layer per unit length in the longitudinal direction of the film is larger in the electrode portion than in the heat generation portion.
    Type: Application
    Filed: January 3, 2019
    Publication date: May 9, 2019
    Inventors: Takeshi Shinji, Takashi Narahara, Kazuhiro Doda, Yutaka Sato, Kohei Wakatsu
  • Patent number: 10254687
    Abstract: A fixing apparatus includes a heating rotating member, a pressure rotating member, and a contact member. A contact holding member holds the contact member so that the contact member presses against the heating rotating member, and causes at least a portion of the contact member to elastically deform between the heating rotating member and the contact holding member. In addition, a displacement mechanism displaces a relative position of the heating rotating member with respect to the pressure rotating member. When the heating rotating member is separated from the pressure rotating member by the displacement mechanism, an interval between a fulcrum, at which the contact holding member holds the contact member, and a contact point, at which the contact member comes into contact with the heating rotating member, does not increase.
    Type: Grant
    Filed: June 22, 2018
    Date of Patent: April 9, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kohei Wakatsu, Takashi Narahara, Takeshi Shinji, Kazuhiro Doda, Yutaka Sato
  • Publication number: 20190094772
    Abstract: A fixing member used for a fixing device includes a tubular base layer; an electrode portion formed on the base layer; a heat generating portion formed on the base layer in such a manner as to be positioned next to the electrode portion in a longitudinal direction of the fixing member, the heat generating portion being electrically connected to the electrode portion; and an overcoat layer formed on the heat generating portion. The heat generating portion is a layer formed by a plurality of thin linear layers extending in the longitudinal direction of the fixing member and spaced from one another along a circumferential direction of the fixing member. The overcoat layer extends over a boundary between the heat generating portion and the electrode portion in the longitudinal direction of the fixing member.
    Type: Application
    Filed: November 27, 2018
    Publication date: March 28, 2019
    Inventors: Yutaka Sato, Takashi Narahara, Takeshi Shinji, Kazuhiro Doda, Kohei Wakatsu
  • Patent number: 10216130
    Abstract: A tubular film used for a fixing apparatus includes a heat generating layer, and a first conductive layer and a second conductive layer provided respectively at one end and another end of the film in a longitudinal direction of the film so as to contact the heat generating layer. The first conductive layer and the second conductive layer both have a lower volume resistivity than that of the heat generating layer. A low-resistance layer is formed in an area of the heat generating layer between the first conductive layer and the second conductive layer in the longitudinal direction so as not to contact the first conductive layer and the second conductive layer. The low-resistance layer has a lower volume resistivity than that of the heat generating layer and extends in a circumferential direction of the heat generating layer.
    Type: Grant
    Filed: June 15, 2016
    Date of Patent: February 26, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toru Imaizumi, Ken Nakagawa, Takashi Narahara, Takeshi Shinji, Kazuhiro Doda, Kohei Wakatsu
  • Patent number: 10209655
    Abstract: A film for use in a fixing device includes a base layer having a cylindrical shape. An electrode portion is formed at an end part of the base layer in a longitudinal direction of the film. A heat generation portion is formed at a central part of the base layer in the longitudinal direction of the film and electrically connected to the electrode portion. The heat generation portion is formed of a conductive layer made of a same material as a material of the electrode portion. A thickness of the conductive layer is larger in the electrode portion than in the heat generation portion. A surface area of the conductive layer per unit length in the longitudinal direction of the film is larger in the electrode portion than in the heat generation portion.
    Type: Grant
    Filed: April 25, 2017
    Date of Patent: February 19, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takeshi Shinji, Takashi Narahara, Kazuhiro Doda, Yutaka Sato, Kohei Wakatsu
  • Publication number: 20180373189
    Abstract: Provided is a fixing apparatus provided with a displacement mechanism 21 which displaces a relative position of a fixing film 1 which generates heat when energized, with respect to a pressure roller 3, wherein, when the fixing film is separated from the pressure roller by the displacement mechanism, an interval between a fulcrum at which a contact holding member 10 holds a contact member 9 and a contact at which the contact member 9 comes into contact with the fixing film 1 does not increase.
    Type: Application
    Filed: June 22, 2018
    Publication date: December 27, 2018
    Inventors: Kohei Wakatsu, Takashi Narahara, Takeshi Shinji, Kazuhiro Doda, Yutaka Sato
  • Patent number: 10152007
    Abstract: A fixing member for a fixing device includes a cylindrical base layer, and a plurality of heat generating resistors extending in a longitudinal direction of the fixing member on the base layer and arranged with intervals in a circumferential direction of the base layer. Each of the plurality of heat generating resistors has a volume resistivity less than that of the base layer. The plurality of heat generating resistors includes a first heat generating resistor and a second heat generating resistor adjacent to each other in the circumferential direction, and the first heat generating resistor and the second heat generating resistor are at least partly overlapped in the circumferential direction.
    Type: Grant
    Filed: May 26, 2017
    Date of Patent: December 11, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takashi Narahara, Takeshi Shinji, Kazuhiro Doda, Yutaka Sato, Kohei Wakatsu
  • Publication number: 20180181039
    Abstract: A fixing device includes a cylindrical film including a heat generating layer and an electroconductive layer electrically connected with the heat generating layer. Volume resistivity of the electroconductive layer is lower than volume resistivity of the heat generating layer. The fixing device further includes an energizing member, a roller, a sliding member, and a supporting member. Thermal conductivity of the sliding member is higher than thermal conductivity of the supporting member. A recording material on which a toner image is formed is heated while being fed through a nip. A longitudinal end of the sliding member is positioned between an inner end surface and an outer end surface of the electroconductive layer with respect to the longitudinal direction of the film.
    Type: Application
    Filed: December 20, 2017
    Publication date: June 28, 2018
    Inventors: Koji An, Takashi Narahara, Takeshi Shinji, Toru Imaizumi, Kazuhiro Doda, Kohei Wakatsu
  • Publication number: 20180173140
    Abstract: A tubular film used for a fixing apparatus, including: a heat generating layer; a first conductive layer and a second conductive layer provided respectively at one end and another end of the film in a longitudinal direction of the film so as to contact the heat generating layer, the first conductive layer and the second conductive layer both having a lower volume resistivity than the heat generating layer; and a low-resistance layer formed in an area of the heat generating layer between the first conductive layer and the second conductive layer in the longitudinal direction so as not to contact the first conductive layer and the second conductive layer, the low-resistance layer having a lower volume resistivity than the heat generating layer and extending in a circumferential direction of the heat generating layer.
    Type: Application
    Filed: June 15, 2016
    Publication date: June 21, 2018
    Inventors: Toru Imaizumi, Ken Nakagawa, Takashi Narahara, Takeshi Shinji, Kazuhiro Doda, Kohei Wakatsu
  • Publication number: 20180074444
    Abstract: A fixing device includes a cylindrical film including a heat generating layer and configured to be supplied with electric power so that the heat generating layer generates heat; a first temperature detecting member contacting the film; a second temperature detecting member contacting the film and provided at such a position that temperature change at the position of the second temperature detecting member is slower in responsiveness than at a position of the first temperature detecting member; and a controller configured to control the electric power supplied to the film. A toner image formed on a recording material is heated by heat from the film and is fixed on the recording material. The controller stops supply of the electric power to the film depending on a difference value between detection temperatures of the first and second temperature detecting members.
    Type: Application
    Filed: September 8, 2017
    Publication date: March 15, 2018
    Inventors: Kohei Wakatsu, Takashi Narahara, Takeshi Shinji, Toru Imaizumi, Kazuhiro Doda
  • Patent number: 9915897
    Abstract: A fixing device includes a heating member including a base layer, first and second electroconductive layers and a plurality of heat generating resistors provided on the base layer and having a volume resistivity smaller than a volume resistivity of the base layer; a temperature detecting member; and an electrode member. The heat generating resistors are provided helically around the base layer so that a helical axis thereof extends along the longitudinal direction of the rotatable member, and are disposed with intervals. One end and the other end of each of the heat generating resistors are electrically connected with the first and the second electroconductive layers, respectively. A temperature detecting region of the rotatable member by the temperature detecting member overlaps with the heat generating resistors.
    Type: Grant
    Filed: August 31, 2016
    Date of Patent: March 13, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takashi Narahara, Takeshi Shinji, Toru Imaizumi, Kazuhiro Doda, Kohei Wakatsu
  • Publication number: 20170343929
    Abstract: A fixing member for a fixing device, the fixing member includes a cylindrical base layer; and a plurality of heat generating resistors extending in a longitudinal direction of the fixing member on the base layer and arranged with intervals in a circumferential direction of the base layer, wherein heat generating resistors have volume resistivities lower than that of the base layer, the heat generating resistors include a first heat generating resistor and a second heat generating resistor adjacent to each other in the circumferential direction, and the first heat generating resistor and the second heat generating resistor are at least partly overlapped in the circumferential direction.
    Type: Application
    Filed: May 26, 2017
    Publication date: November 30, 2017
    Inventors: Takashi Narahara, Takeshi Shinji, Kazuhiro Doda, Yutaka Sato, Kohei Wakatsu
  • Publication number: 20170315484
    Abstract: A film for use in a fixing device includes a base layer having a cylindrical shape. An electrode portion is formed at an end part of the base layer in a longitudinal direction of the film. A heat generation portion is formed at a central part of the base layer in the longitudinal direction of the film and electrically connected to the electrode portion. The heat generation portion is formed of a conductive layer made of a same material as a material of the electrode portion. A thickness of the conductive layer is larger in the electrode portion than in the heat generation portion. A surface area of the conductive layer per unit length in the longitudinal direction of the film is larger in the electrode portion than in the heat generation portion.
    Type: Application
    Filed: April 25, 2017
    Publication date: November 2, 2017
    Inventors: Takeshi Shinji, Takashi Narahara, Kazuhiro Doda, Yutaka Sato, Kohei Wakatsu
  • Publication number: 20170060052
    Abstract: A fixing device includes a heating member including a base layer, first and second electroconductive layers and a plurality of heat generating resistors provided on the base layer and having a volume resistivity smaller than a volume resistivity of the base layer; a temperature detecting member; and an electrode member. The heat generating resistors are provided helically around the base layer so that a helical axis thereof extends along the longitudinal direction of the rotatable member, and are disposed with intervals. One end and the other end of each of the heat generating resistors are electrically connected with the first and the second electroconductive layers, respectively. A temperature detecting region of the rotatable member by the temperature detecting member overlaps with the heat generating resistors.
    Type: Application
    Filed: August 31, 2016
    Publication date: March 2, 2017
    Inventors: Takashi Narahara, Takeshi Shinji, Toru Imaizumi, Kazuhiro Doda, Kohei Wakatsu
  • Patent number: 9110417
    Abstract: A fixing apparatus includes a roller, a first unit configured to heat the roller, the first unit including a first tubular film, a heating portion forming member to form a heating portion with the roller, and a first guide member dotted with first protruding portions contacting the inner surface of the first tubular film, and a second unit configured to form a nip portion with the roller, the second unit including a second tubular film, a nip portion forming member to form the nip portion with the roller, and a second guide member dotted with second protruding portions contacting the inner surface of the second tubular film, wherein there is a non-overlapping area between the first protruding portions and the second protruding portions in a generatrix direction of the roller.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: August 18, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takanori Mitani, Satoshi Nishida, Hideo Nanataki, Shogo Kan, Takeshi Shinji