Patents by Inventor Koji Fujinaka

Koji Fujinaka 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: 20210405555
    Abstract: An image forming apparatus includes a developer container to and from which the replenishment container is attachable and detachable and which includes an accommodating portion that accommodates developer and a replenishment port, an agitation, an opening/closing member configured to be movable between a closed position and an open position, a drive source for driving the agitation member, and a control portion configured to control the drive source, wherein the apparatus is configured such that image formation is not possible when the opening/closing member is at the open position, and the agitation member is capable of driving in a case where the opening/closing member is at the open position.
    Type: Application
    Filed: September 13, 2021
    Publication date: December 30, 2021
    Inventors: Tsuyoshi Ogawa, Masaaki Sato, Hiroshi Takarada, Koji Fujinaka, Akotoshi Toyota, Yuichiro Inaba, Kenichi Iida, Susumu Nittani
  • Publication number: 20210405577
    Abstract: An apparatus includes a developer container to and from which a replenishment container is attachable and detachable and which includes an accommodating portion and a replenishment port, a transfer portion configured to transfer a developer image on an image bearing member onto a recording material, a supporting tray including a supporting surface configured to support the recording material thereon, and a discharge portion configured to discharge the recording material, onto which the developer image has been transferred, on the supporting surface, wherein the supporting surface has an opening portion opening such that the replenishment port is exposed through the supporting surface, and wherein an opening/closing member configured to be movable between a closed position where the opening/closing member covers the replenishment port and serves as a part of the supporting surface and an open position where the replenishment port is exposed is provided.
    Type: Application
    Filed: September 13, 2021
    Publication date: December 30, 2021
    Inventors: Tomio Noguchi, Masaaki Sato, Kenji Matsuzaka, Koji Fujinaka, Takao Sameshima, Akitoshi Toyota, Yuichiro Inaba, Kenichi Iida
  • Publication number: 20210405552
    Abstract: An apparatus includes an image bearing member, a developer container having a replenishment port, a developer bearing member, a detection portion configured to output remainder amount information corresponding to the amount of developer accommodated in the developer container, a notification portion capable of notifying a first state, and a second state, and a control portion, wherein the maximum amount of the developer that the developer container is capable of accommodating is larger than a value obtained by adding the amount of the developer accommodated in a replenishment container containing the developer for replenishment to the first amount, and wherein notification of the second state corresponds to notification of a case where the amount of the developer remaining in the developer container is larger than a case where the amount of the developer remaining in the developer container is the smallest.
    Type: Application
    Filed: September 10, 2021
    Publication date: December 30, 2021
    Inventors: Masaaki Sato, Koji Wada, Tsuyoshi Ogawa, Koji Fujinaka, Takao Sameshima, Tomio Noguchi, Akitoshi Toyota, Susumu Nittani
  • Patent number: 10481536
    Abstract: The present invention relates to a fixing apparatus including a tubular film, a heater provided at an inside of the film, a protection element provided at the inside of the film, and at least one conductive member provided at the inside of the film. The protection element includes two terminals and a switch that turns off to shut off power to the heater when the heater abnormally generates heat. A first end of the conductive member is electrically connected to one of the terminals of the protection element. The conductive member is not coated with an insulator, and a second end of the conductive member projects out of the film so that the cost of the fixing apparatus is reduced.
    Type: Grant
    Filed: January 29, 2019
    Date of Patent: November 19, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Keisuke Fujita, Naoki Hayashi, Masaaki Takeuchi, Koji Fujinaka
  • Publication number: 20190171144
    Abstract: The present invention relates to a fixing apparatus including a tubular film, a heater provided at an inside of the film, a protection element provided at the inside of the film, and at least one conductive member provided at the inside of the film. The protection element includes two terminals and a switch that turns off to shut off power to the heater when the heater abnormally generates heat. A first end of the conductive member is electrically connected to one of the terminals of the protection element. The conductive member is not coated with an insulator, and a second end of the conductive member projects out of the film so that the cost of the fixing apparatus is reduced.
    Type: Application
    Filed: January 29, 2019
    Publication date: June 6, 2019
    Inventors: Keisuke Fujita, Naoki Hayashi, Masaaki Takeuchi, Koji Fujinaka
  • Patent number: 10248058
    Abstract: The present invention relates to a fixing apparatus including a tubular film, a heater provided at an inside of the film, a protection element provided at the inside of the film, and at least one conductive member provided at the inside of the film. The protection element includes two terminals and a switch that turns off to shut off power to the heater when the heater abnormally generates heat. A first end of the conductive member is electrically connected to one of the terminals of the protection element. The conductive member is not coated with an insulator, and a second end of the conductive member projects out of the film so that the cost of the fixing apparatus is reduced.
    Type: Grant
    Filed: January 28, 2016
    Date of Patent: April 2, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Keisuke Fujita, Naoki Hayashi, Masaaki Takeuchi, Koji Fujinaka
  • Patent number: 10173853
    Abstract: A feeding apparatus includes a sheet supporting member, a feeding member, and a lift unit. The lift unit lifts and lowers the sheet supporting member to abut a sheet stacked on the sheet supporting member against the feeding member. The lift unit includes an urging member that biases the sheet supporting member towards the feeding member, a moving member that moves in a first direction different from a sheet supporting member lifting direction, and a contact member in contact with the moving member. The contact member includes a curved cam surface in a region that comes in contact with the moving member. A contact state between the moving member and the contact member is changed by moving the moving member in the first direction and the curved cam surface. Regarding changing the contact state, the sheet supporting member can be moved to a feed position and a retracted position.
    Type: Grant
    Filed: June 21, 2017
    Date of Patent: January 8, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Koji Fujinaka, Fuyuto Yamashita
  • Publication number: 20180024480
    Abstract: The present invention relates to a fixing apparatus including a tubular film, a heater provided at an inside of the film, a protection element provided at the inside of the film, and at least one conductive member provided at the inside of the film. The protection element includes two terminals and a switch that turns off to shut off power to the heater when the heater abnormally generates heat. A first end of the conductive member is electrically connected to one of the terminals of the protection element. The conductive member is not coated with an insulator, and a second end of the conductive member projects out of the film so that the cost of the fixing apparatus is reduced.
    Type: Application
    Filed: January 28, 2016
    Publication date: January 25, 2018
    Inventors: Keisuke Fujita, Naoki Hayashi, Masaaki Takeuchi, Koji Fujinaka
  • Publication number: 20180002123
    Abstract: A feeding apparatus includes a sheet supporting member, a feeding member, and a lift unit. The lift unit lifts and lowers the sheet supporting member to abut a sheet stacked on the sheet supporting member against the feeding member. The lift unit includes an urging member that biases the sheet supporting member towards the feeding member, a moving member that moves in a first direction different from a sheet supporting member lifting direction, and a contact member in contact with the moving member. The contact member includes a curved cam surface in a region that comes in contact with the moving member. A contact state between the moving member and the contact member is changed by moving the moving member in the first direction and the curved cam surface. Regarding changing the contact state, the sheet supporting member can be moved to a feed position and a retracted position.
    Type: Application
    Filed: June 21, 2017
    Publication date: January 4, 2018
    Inventors: Koji Fujinaka, Fuyuto Yamashita
  • Patent number: 9851675
    Abstract: An object is to provide an image forming apparatus capable of switching, with a simple configuration, the positional relation between a supporting member and a feeding member and the positional relation between a developing member and a photosensitive member. A separation cam 100 rotated by the driving force of a motor M and a slider 101 moving in accordance with the rotation of the separation cam 100 are configured to switch the positional relation between a lifting plate 13 and a feeding roller 3 and the positional relation between a developing roller 103b and a photosensitive drum 8.
    Type: Grant
    Filed: March 21, 2016
    Date of Patent: December 26, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masatoshi Takiguchi, Koji Fujinaka
  • Publication number: 20160282787
    Abstract: An object is to provide an image forming apparatus capable of switching, with a simple configuration, the positional relation between a supporting member and a feeding member and the positional relation between a developing member and a photosensitive member. A separation cam 100 rotated by the driving force of a motor M and a slider 101 moving in accordance with the rotation of the separation cam 100 are configured to switch the positional relation between a lifting plate 13 and a feeding roller 3 and the positional relation between a developing roller 103b and a photosensitive drum 8.
    Type: Application
    Filed: March 21, 2016
    Publication date: September 29, 2016
    Inventors: Masatoshi Takiguchi, Koji Fujinaka