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).
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Publication number: 20180039227Abstract: 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: ApplicationFiled: October 18, 2017Publication date: February 8, 2018Inventors: Akira Yoshimura, Kazunari Murayama, Susumu Nittani, Atsushi Numagami
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Patent number: 9857763Abstract: 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: GrantFiled: September 9, 2016Date of Patent: January 2, 2018Assignee: Canon Kabushiki KaishaInventors: Akira Yoshimura, Kazunari Murayama, Susumu Nittani, Atsushi Numagami
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Patent number: 9829856Abstract: 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: GrantFiled: October 26, 2016Date of Patent: November 28, 2017Assignee: Canon Kabushiki KaishaInventors: Akira Yoshimura, Kazunari Murayama, Susumu Nittani, Atsushi Numagami
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Publication number: 20170108825Abstract: 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: ApplicationFiled: October 26, 2016Publication date: April 20, 2017Inventors: Akira Yoshimura, Kazunari Murayama, Susumu Nittani, Atsushi Numagami
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Publication number: 20160378056Abstract: 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: ApplicationFiled: September 9, 2016Publication date: December 29, 2016Inventors: Akira Yoshimura, Kazunari Murayama, Susumu Nittani, Atsushi Numagami
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Patent number: 9519260Abstract: 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: GrantFiled: April 8, 2016Date of Patent: December 13, 2016Assignee: Canon Kabushiki KaishaInventors: Akira Yoshimura, Kazunari Murayama, Susumu Nittani, Atsushi Numagami
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Patent number: 9507318Abstract: 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: GrantFiled: August 13, 2015Date of Patent: November 29, 2016Assignee: Canon Kabushiki KaishaInventors: Hideki Maeshima, Kazunari Murayama, Akira Yoshimura
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Patent number: 9501034Abstract: 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: GrantFiled: August 18, 2015Date of Patent: November 22, 2016Assignee: Canon Kabushiki KaishaInventors: Akira Yoshimura, Kazunari Murayama, Susumu Nittani, Atsushi Numagami
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Patent number: 9494916Abstract: 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: GrantFiled: April 12, 2016Date of Patent: November 15, 2016Assignee: Canon Kabushiki KaishaInventors: Akira Yoshimura, Kazunari Murayama, Susumu Nittani, Atsushi Numagami
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Patent number: 9465353Abstract: 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: GrantFiled: April 12, 2016Date of Patent: October 11, 2016Assignee: Canon Kabushiki KaishaInventors: Akira Yoshimura, Kazunari Murayama, Susumu Nittani, Atsushi Numagami
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Publication number: 20160223980Abstract: 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: ApplicationFiled: April 8, 2016Publication date: August 4, 2016Inventors: Akira Yoshimura, Kazunari Murayama, Susumu Nittani, Atsushi Numagami
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Publication number: 20160223985Abstract: 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: ApplicationFiled: April 12, 2016Publication date: August 4, 2016Inventors: Akira Yoshimura, Kazunari Murayama, Susumu Nittani, Atsushi Numagami
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Publication number: 20160048105Abstract: 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: ApplicationFiled: August 18, 2015Publication date: February 18, 2016Inventors: Akira Yoshimura, Kazunari Murayama, Susumu Nittani, Atsushi Numagami
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Publication number: 20160041521Abstract: 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-byType: ApplicationFiled: August 13, 2015Publication date: February 11, 2016Inventors: Hideki Maeshima, Kazunari Murayama, Akira Yoshimura
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Patent number: 9141083Abstract: 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: GrantFiled: November 20, 2014Date of Patent: September 22, 2015Assignee: Canon Kabushiki KaishaInventors: Akira Yoshimura, Kazunari Murayama, Susumu Nittani, Atsushi Numagami
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Patent number: 9122237Abstract: 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: GrantFiled: February 27, 2014Date of Patent: September 1, 2015Assignee: Canon Kabushiki KaishaInventors: Hideki Maeshima, Kazunari Murayama, Akira Yoshimura
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Publication number: 20150078780Abstract: 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: ApplicationFiled: November 20, 2014Publication date: March 19, 2015Inventors: Akira Yoshimura, Kazunari Murayama, Susumu Nittani, Atsushi Numagami
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Patent number: 8971760Abstract: 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: GrantFiled: July 30, 2013Date of Patent: March 3, 2015Assignee: Canon Kabushiki KaishaInventors: Akira Yoshimura, Kazunari Murayama, Susumu Nittani, Atsushi Numagami
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Publication number: 20140178097Abstract: 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: ApplicationFiled: February 27, 2014Publication date: June 26, 2014Applicant: CANON KABUSHIKI KAISHAInventors: Hideki Maeshima, Kazunari Murayama, Akira Yoshimura
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Patent number: 8688003Abstract: A process cartridge is provided for detachably mounting to a main assembly of an electrophotographic image forming apparatus.Type: GrantFiled: December 19, 2012Date of Patent: April 1, 2014Assignee: Canon Kabushiki KaishaInventors: Hideki Maeshima, Kazunari Murayama, Akira Yoshimura