Patents by Inventor Kazunari Murayama

Kazunari Murayama 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: 20180039227
    Abstract: A process cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus. The cartridge includes an electrophotographic photosensitive drum, a developing roller, a drum unit containing the drum, a developing unit containing the roller and being movable so the roller contacts and is spaced from the drum, and a first force receiver receiving a force from a main-assembly first force applier by movement of a door from open to closed positions when mounting the cartridge and a second force receiver movable from a stand-by position by movement of the first force receiver by a force received from the first force applier. The second force receiver takes a projected position receiving a force from the second force applier to move the developing unit so the roller moves out of contact with the drum, the projected position being higher than the stand-by position.
    Type: Application
    Filed: October 18, 2017
    Publication date: February 8, 2018
    Inventors: Akira Yoshimura, Kazunari Murayama, Susumu Nittani, Atsushi Numagami
  • Patent number: 9857763
    Abstract: A process cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus. The cartridge includes an electrophotographic photosensitive drum, a developing roller, a drum unit containing the drum, a developing unit containing the roller and being movable so the roller contacts and is spaced from the drum, and a first force receiver receiving a force from a main-assembly first force applier by movement of a door from open to closed positions when mounting the cartridge and a second force receiver movable from a stand-by position by movement of the first force receiver by a force received from the first force applier. The second force receiver takes a projected position receiving a force from the second force applier to move the developing unit so the roller moves out of contact with the drum, the projected position being higher than the stand-by position.
    Type: Grant
    Filed: September 9, 2016
    Date of Patent: January 2, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akira Yoshimura, Kazunari Murayama, Susumu Nittani, Atsushi Numagami
  • Patent number: 9829856
    Abstract: A process cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus. The cartridge includes an electrophotographic photosensitive drum, a developing roller, a drum unit containing the drum, a developing unit containing the roller and being movable so the roller contacts and is spaced from the drum, and a first force receiver receiving a force from a main-assembly first force applier by movement of a door from open to closed positions when mounting the cartridge and a second force receiver movable from a stand-by position by movement of the first force receiver by a force received from the first force applier. The second force receiver takes a projected position receiving a force from the second force applier to move the developing unit so the roller moves out of contact with the drum, the projected position being higher than the stand-by position.
    Type: Grant
    Filed: October 26, 2016
    Date of Patent: November 28, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akira Yoshimura, Kazunari Murayama, Susumu Nittani, Atsushi Numagami
  • Publication number: 20170108825
    Abstract: A process cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus. The cartridge includes an electrophotographic photosensitive drum, a developing roller, a drum unit containing the drum, a developing unit containing the roller and being movable so the roller contacts and is spaced from the drum, and a first force receiver receiving a force from a main-assembly first force applier by movement of a door from open to closed positions when mounting the cartridge and a second force receiver movable from a stand-by position by movement of the first force receiver by a force received from the first force applier. The second force receiver takes a projected position receiving a force from the second force applier to move the developing unit so the roller moves out of contact with the drum, the projected position being higher than the stand-by position.
    Type: Application
    Filed: October 26, 2016
    Publication date: April 20, 2017
    Inventors: Akira Yoshimura, Kazunari Murayama, Susumu Nittani, Atsushi Numagami
  • Publication number: 20160378056
    Abstract: A process cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus. The cartridge includes an electrophotographic photosensitive drum, a developing roller, a drum unit containing the drum, a developing unit containing the roller and being movable so the roller contacts and is spaced from the drum, and a first force receiver receiving a force from a main-assembly first force applier by movement of a door from open to closed positions when mounting the cartridge and a second force receiver movable from a stand-by position by movement of the first force receiver by a force received from the first force applier. The second force receiver takes a projected position receiving a force from the second force applier to move the developing unit so the roller moves out of contact with the drum, the projected position being higher than the stand-by position.
    Type: Application
    Filed: September 9, 2016
    Publication date: December 29, 2016
    Inventors: Akira Yoshimura, Kazunari Murayama, Susumu Nittani, Atsushi Numagami
  • Patent number: 9519260
    Abstract: A process cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus. The cartridge includes an electrophotographic photosensitive drum, a developing roller, a drum unit containing the drum, a developing unit containing the roller and being movable so the roller contacts and is spaced from the drum, and a first force receiver receiving a force from a main-assembly first force applier by movement of a door from open to closed positions when mounting the cartridge and a second force receiver movable from a stand-by position by movement of the first force receiver by a force received from the first force applier. The second force receiver takes a projected position receiving a force from the second force applier to move the developing unit so the roller moves out of contact with the drum, the projected position being higher than the stand-by position.
    Type: Grant
    Filed: April 8, 2016
    Date of Patent: December 13, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akira Yoshimura, Kazunari Murayama, Susumu Nittani, Atsushi Numagami
  • Patent number: 9507318
    Abstract: A process cartridge includes a force receiving member that is provided movably relative to a developing frame. The force receiving member includes a spacing force receiving portion configured to receive a spacing force for moving a developing roller when the force receiving member is in a projected position, and a retracting force receiving portion configured to receive a retracting force for moving the force receiving member toward a retracted position when the force receiving member is in the projected position. The retracting force receiving portion has a surface slanted with respect to the direction in which the spacing force receiving portion is capable of receiving the spacing force.
    Type: Grant
    Filed: August 13, 2015
    Date of Patent: November 29, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hideki Maeshima, Kazunari Murayama, Akira Yoshimura
  • Patent number: 9501034
    Abstract: A process cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus. The cartridge includes an electrophotographic photosensitive drum, a developing roller, a drum unit containing the drum, a developing unit containing the roller and being movable so the roller contacts and is spaced from the drum, and a first force receiver receiving a force from a main-assembly first force applier by movement of a door from open to closed positions when mounting the cartridge and a second force receiver movable from a stand-by position by movement of the first force receiver by a force received from the first force applier. The second force receiver takes a projected position receiving a force from the second force applier to move the developing unit so the roller moves out of contact with the drum, the projected position being higher than the stand-by position.
    Type: Grant
    Filed: August 18, 2015
    Date of Patent: November 22, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akira Yoshimura, Kazunari Murayama, Susumu Nittani, Atsushi Numagami
  • Patent number: 9494916
    Abstract: A process cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus. The cartridge includes an electrophotographic photosensitive drum, a developing roller, a drum unit containing the drum, a developing unit containing the roller and being movable so the roller contacts and is spaced from the drum, and a first force receiver receiving a force from a main-assembly first force applier by movement of a door from open to closed positions when mounting the cartridge and a second force receiver movable from a stand-by position by movement of the first force receiver by a force received from the first force applier. The second force receiver takes a projected position receiving a force from the second force applier to move the developing unit so the roller moves out of contact with the drum, the projected position being higher than the stand-by position.
    Type: Grant
    Filed: April 12, 2016
    Date of Patent: November 15, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akira Yoshimura, Kazunari Murayama, Susumu Nittani, Atsushi Numagami
  • Patent number: 9465353
    Abstract: A process cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus. The cartridge includes an electrophotographic photosensitive drum, a developing roller, a drum unit containing the drum, a developing unit containing the roller and being movable so the roller contacts and is spaced from the drum, and a first force receiver receiving a force from a main-assembly first force applier by movement of a door from open to closed positions when mounting the cartridge and a second force receiver movable from a stand-by position by movement of the first force receiver by a force received from the first force applier. The second force receiver takes a projected position receiving a force from the second force applier to move the developing unit so the roller moves out of contact with the drum, the projected position being higher than the stand-by position.
    Type: Grant
    Filed: April 12, 2016
    Date of Patent: October 11, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akira Yoshimura, Kazunari Murayama, Susumu Nittani, Atsushi Numagami
  • Publication number: 20160223980
    Abstract: A process cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus. The cartridge includes an electrophotographic photosensitive drum, a developing roller, a drum unit containing the drum, a developing unit containing the roller and being movable so the roller contacts and is spaced from the drum, and a first force receiver receiving a force from a main-assembly first force applier by movement of a door from open to closed positions when mounting the cartridge and a second force receiver movable from a stand-by position by movement of the first force receiver by a force received from the first force applier. The second force receiver takes a projected position receiving a force from the second force applier to move the developing unit so the roller moves out of contact with the drum, the projected position being higher than the stand-by position.
    Type: Application
    Filed: April 8, 2016
    Publication date: August 4, 2016
    Inventors: Akira Yoshimura, Kazunari Murayama, Susumu Nittani, Atsushi Numagami
  • Publication number: 20160223985
    Abstract: A process cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus. The cartridge includes an electrophotographic photosensitive drum, a developing roller, a drum unit containing the drum, a developing unit containing the roller and being movable so the roller contacts and is spaced from the drum, and a first force receiver receiving a force from a main-assembly first force applier by movement of a door from open to closed positions when mounting the cartridge and a second force receiver movable from a stand-by position by movement of the first force receiver by a force received from the first force applier. The second force receiver takes a projected position receiving a force from the second force applier to move the developing unit so the roller moves out of contact with the drum, the projected position being higher than the stand-by position.
    Type: Application
    Filed: April 12, 2016
    Publication date: August 4, 2016
    Inventors: Akira Yoshimura, Kazunari Murayama, Susumu Nittani, Atsushi Numagami
  • Publication number: 20160048105
    Abstract: A process cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus. The cartridge includes an electrophotographic photosensitive drum, a developing roller, a drum unit containing the drum, a developing unit containing the roller and being movable so the roller contacts and is spaced from the drum, and a first force receiver receiving a force from a main-assembly first force applier by movement of a door from open to closed positions when mounting the cartridge and a second force receiver movable from a stand-by position by movement of the first force receiver by a force received from the first force applier. The second force receiver takes a projected position receiving a force from the second force applier to move the developing unit so the roller moves out of contact with the drum, the projected position being higher than the stand-by position.
    Type: Application
    Filed: August 18, 2015
    Publication date: February 18, 2016
    Inventors: Akira Yoshimura, Kazunari Murayama, Susumu Nittani, Atsushi Numagami
  • Publication number: 20160041521
    Abstract: A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, includes an electrophotographic photosensitive drum; developing roller for developing an electrostatic latent image formed on the electrophotographic photosensitive drum; drum frame supporting the electrophotographic photosensitive drum; a developing frame supporting the developing roller, the developing roller being movable relative to the drum frame between a contacting position in which the developing roller is in contact with the electrophotographic photosensitive drum and a spacing position in which the developing roller is spaced from the electrophotographic photosensitive drum; a force receiving member, provided movably relative to the developing frame, for receiving an external force, wherein the force receiving member is capable of taking an operating position for moving the developing frame from the contacting position to the spacing position by receiving the external force, and a stand-by
    Type: Application
    Filed: August 13, 2015
    Publication date: February 11, 2016
    Inventors: Hideki Maeshima, Kazunari Murayama, Akira Yoshimura
  • Patent number: 9141083
    Abstract: A process cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus. The cartridge includes an electrophotographic photosensitive drum, a developing roller, a drum unit containing the drum, a developing unit containing the roller and being movable so the roller contacts and is spaced from the drum, and a first force receiver receiving a force from a main-assembly first force applier by movement of a door from open to closed positions when mounting the cartridge and a second force receiver movable from a stand-by position by movement of the first force receiver by a force received from the first force applier. The second force receiver takes a projected position receiving a force from the second force applier to move the developing unit so the roller moves out of contact with the drum, the projected position being higher than the stand-by position.
    Type: Grant
    Filed: November 20, 2014
    Date of Patent: September 22, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akira Yoshimura, Kazunari Murayama, Susumu Nittani, Atsushi Numagami
  • Patent number: 9122237
    Abstract: A process cartridge includes an electrophotographic photosensitive drum and a developing roller for developing an electrostatic latent image formed on the electrophotographic photosensitive drum. The cartridge also includes a developing frame supporting the developing roller. A force receiving member is provided, with the force receiving member including a spacing force receiving portion movable relative to the developing frame to move between a first position and a second position in which the spacing force receiving portion is retracted from the first position toward an inside of the developing frame.
    Type: Grant
    Filed: February 27, 2014
    Date of Patent: September 1, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hideki Maeshima, Kazunari Murayama, Akira Yoshimura
  • Publication number: 20150078780
    Abstract: A process cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus. The cartridge includes an electrophotographic photosensitive drum, a developing roller, a drum unit containing the drum, a developing unit containing the roller and being movable so the roller contacts and is spaced from the drum, and a first force receiver receiving a force from a main-assembly first force applier by movement of a door from open to closed positions when mounting the cartridge and a second force receiver movable from a stand-by position by movement of the first force receiver by a force received from the first force applier. The second force receiver takes a projected position receiving a force from the second force applier to move the developing unit so the roller moves out of contact with the drum, the projected position being higher than the stand-by position.
    Type: Application
    Filed: November 20, 2014
    Publication date: March 19, 2015
    Inventors: Akira Yoshimura, Kazunari Murayama, Susumu Nittani, Atsushi Numagami
  • Patent number: 8971760
    Abstract: A process cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus. The cartridge includes an electrophotographic photosensitive drum, a developing roller, a drum unit containing the drum, a developing unit containing the roller and being movable so the roller contacts and is spaced from the drum, and a first force receiver receiving a force from a main-assembly first force applier by movement of a door from open to closed positions when mounting the cartridge and a second force receiver movable from a stand-by position by movement of the first force receiver by a force received from the first force applier. The second force receiver takes a projected position receiving a force from the second force applier to move the developing unit so the roller moves out of contact with the drum, the projected position being higher than the stand-by position.
    Type: Grant
    Filed: July 30, 2013
    Date of Patent: March 3, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akira Yoshimura, Kazunari Murayama, Susumu Nittani, Atsushi Numagami
  • Publication number: 20140178097
    Abstract: A process cartridge includes an electrophotographic photosensitive drum and a developing roller for developing an electrostatic latent image formed on the electrophotographic photosensitive drum. The cartridge also includes a developing frame supporting the developing roller. A force receiving member is provided, with the force receiving member including a spacing force receiving portion movable relative to the developing frame to move between a first position and a second position in which the spacing force receiving portion is retracted from the first position toward an inside of the developing frame.
    Type: Application
    Filed: February 27, 2014
    Publication date: June 26, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Hideki Maeshima, Kazunari Murayama, Akira Yoshimura
  • Patent number: 8688003
    Abstract: A process cartridge is provided for detachably mounting to a main assembly of an electrophotographic image forming apparatus.
    Type: Grant
    Filed: December 19, 2012
    Date of Patent: April 1, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hideki Maeshima, Kazunari Murayama, Akira Yoshimura