Patents by Inventor Hiromitsu Fujiya

Hiromitsu Fujiya 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: 10082768
    Abstract: An image forming apparatus includes a conveyance path to convey a recording medium; an image forming device to form an image on the recording medium; a heating device to heat the recording medium; an image detector disposed downstream from the heating device in a direction of conveyance of the recording medium, to detect the image on the recording medium; and a protector projecting beyond the image detector toward the conveyance path. The protector is to protect the image detector; and a heat conductive holder holds the protector.
    Type: Grant
    Filed: December 22, 2017
    Date of Patent: September 25, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Hiromitsu Fujiya, Susumu Tateyama, Keisuke Yuasa, Yuusuke Kumagawa
  • Publication number: 20180181060
    Abstract: An image forming apparatus includes a conveyance path to convey a recording medium; an image forming device to form an image on the recording medium; a heating device to heat the recording medium; an image detector disposed downstream from the heating device in a direction of conveyance of the recording medium, to detect the image on the recording medium; and a protector projecting beyond the image detector toward the conveyance path. The protector is to protect the image detector; and a heat conductive holder holds the protector.
    Type: Application
    Filed: December 22, 2017
    Publication date: June 28, 2018
    Inventors: Hiromitsu Fujiya, Susumu Tateyama, Keisuke Yuasa, Yuusuke Kumagawa
  • Patent number: 9864334
    Abstract: A recording-material cooling device includes a first cooling member, a second cooling member, an approach-and-separation member, and a positioning member. The first cooling member is disposed at a first face side of a recording material to absorb heat of the recording material. The second cooling member is disposed at a second face side of the recording material to absorb heat of the recording material. The approach-and-separation member brings the first cooling member and the second cooling member close to and away from each other. The positioning member positions the first cooling member and the second cooling member relatively brought close to each other by the approach-and-separation member.
    Type: Grant
    Filed: August 5, 2016
    Date of Patent: January 9, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Keisuke Ikeda, Tomoyasu Hirasawa, Kenichi Takehara, Hiromitsu Fujiya, Keisuke Yuasa, Yasuaki Toda, Susumu Tateyama, Hiroaki Miyagawa, Kenji Ishii, Takeshi Watanabe
  • Patent number: 9791828
    Abstract: An image forming apparatus includes a latent image bearer, a charger, a blower, a first detector, and a second detector. The charger charges a surface of the latent image bearer. The blower sends air to around the charger. The first detector detects a temperature of the air to be sent to around the charger. The second detector detects a temperature around the charger. The blower performs an operation based on a detection result of the first detector and a detection result of the second detector.
    Type: Grant
    Filed: May 13, 2016
    Date of Patent: October 17, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventors: Hiromitsu Fujiya, Yasuaki Toda
  • Patent number: 9791830
    Abstract: A duct that is attachable to a main body includes a flow passage to flow air, the flow passage including a flexible structure, and a ventilation opening at a first end of the flow passage. The ventilation opening and at least a part of flow passage are passable through a recess of a detachable device which detachable from the main body. A main body including the duct, the detachable device, and an airflow generation device is also provided.
    Type: Grant
    Filed: April 19, 2016
    Date of Patent: October 17, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Hiromitsu Fujiya, Tomoaki Suga
  • Patent number: 9513598
    Abstract: A cooling device includes a rotatable belt extended by a plurarity of extending members that transfers a sheet in contact with the surface of the belt, and a plurality of cooling members to cool the sheet via the belt. A cooling surface of the cooling members contacts an internal surface of the transport belt. The cooling members are detachable. The cooling device also includes an adjuster to adjust a contact condition between the cooling surface and the internal surface according to the number of cooling members installed.
    Type: Grant
    Filed: March 10, 2016
    Date of Patent: December 6, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Keisuke Ikeda, Tomoyasu Hirasawa, Kenichi Takehara, Hiromitsu Fujiya, Keisuke Yuasa
  • Publication number: 20160342135
    Abstract: An image forming apparatus includes a latent image bearer, a charger, a blower, a first detector, and a second detector. The charger charges a surface of the latent image bearer. The blower sends air to around the charger. The first detector detects a temperature of the air to be sent to around the charger. The second detector detects a temperature around the charger. The blower performs an operation based on a detection result of the first detector and a detection result of the second detector.
    Type: Application
    Filed: May 13, 2016
    Publication date: November 24, 2016
    Applicant: Ricoh Company, Ltd.
    Inventors: Hiromitsu Fujiya, Yasuaki TODA
  • Publication number: 20160342136
    Abstract: A recording-material cooling device includes a first cooling member, a second cooling member, an approach-and-separation member, and a positioning member. The first cooling member is disposed at a first face side of a recording material to absorb heat of the recording material. The second cooling member is disposed at a second face side of the recording material to absorb heat of the recording material. The approach-and-separation member brings the first cooling member and the second cooling member close to and away from each other. The positioning member positions the first cooling member and the second cooling member relatively brought close to each other by the approach-and-separation member.
    Type: Application
    Filed: August 5, 2016
    Publication date: November 24, 2016
    Inventors: Keisuke IKEDA, Tomoyasu HIRASAWA, Kenichi TAKEHARA, Hiromitsu FUJIYA, Keisuke YUASA, Yasuaki TODA, Susumu TATEYAMA, Hiroaki MIYAGAWA, Kenji ISHII, Takeshi WATANABE
  • Patent number: 9483018
    Abstract: A recording-material cooling device includes a first belt, a first cooling unit, and a second cooling unit. The first belt is disposed at a first face side of a recording material. The first cooling unit has a first heat absorbing surface to contact the first belt to absorb heat of the recording material. The second cooling unit has a second heat absorbing surface to directly or indirectly contact the recording material to absorb heat of the recording material. The second cooling unit is disposed at a second face side of the recording material. The first and second cooling units are offset from each other in a transport direction of the recording material. Each of the first and second surfaces has a shape in which an inner area protrudes beyond opposed ends in the transport direction. The first and second surfaces overlap each other in a direction crossing the transport direction.
    Type: Grant
    Filed: October 27, 2015
    Date of Patent: November 1, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Tomoyasu Hirasawa, Kenichi Takehara, Hiromitsu Fujiya, Keisuke Yuasa, Yasuaki Toda, Yutaka Shoji, Kenji Ishii, Makoto Nakura, Susumu Tateyama, Hiroaki Miyagawa, Keisuke Ikeda, Takeshi Watanabe
  • Publication number: 20160313693
    Abstract: A duct that is attachable to a main body includes a flow passage to flow air, the flow passage including a flexible structure, and a ventilation opening at a first end of the flow passage. The ventilation opening and at least a part of flow passage are passable through a recess of a detachable device which detachable from the main body. A main body including the duct, the detachable device, and an airflow generation device is also provided.
    Type: Application
    Filed: April 19, 2016
    Publication date: October 27, 2016
    Inventors: Hiromitsu FUJIYA, Tomoaki SUGA
  • Patent number: 9465358
    Abstract: A recording-material cooling device includes a first cooling member, a second cooling member, an approach-and-separation member, and a positioning member. The first cooling member is disposed at a first face side of a recording material to absorb heat of the recording material. The second cooling member is disposed at a second face side of the recording material to absorb heat of the recording material. The approach-and-separation member brings the first cooling member and the second cooling member close to and away from each other. The positioning member positions the first cooling member and the second cooling member relatively brought close to each other by the approach-and-separation member.
    Type: Grant
    Filed: April 23, 2015
    Date of Patent: October 11, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Keisuke Ikeda, Tomoyasu Hirasawa, Kenichi Takehara, Hiromitsu Fujiya, Keisuke Yuasa, Yasuaki Toda, Susumu Tateyama, Hiroaki Miyagawa, Kenji Ishii, Takeshi Watanabe
  • Patent number: 9423730
    Abstract: A cooling device including at least two cooling members to cool a recording medium passing thereover, a coolant circulation unit to circulate a coolant, and tubing that connects the coolant circulation unit to the cooling members and through which the coolant circulates. Each of the cooling members includes a heat-absorbing surface that directly contacts the recording medium or indirectly contacts the recording medium via a thermal transmission member, an internal channel provided within each of the cooling members through which the coolant circulates, and a channel inlet and outlet formed at downstream and upstream ends of each of the cooling members in a direction of conveyance of the recording medium, respectively. One of an interval and a thermal insulator is provided between the cooling members.
    Type: Grant
    Filed: June 1, 2015
    Date of Patent: August 23, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Keisuke Ikeda, Satoshi Okano, Tomoyasu Hirasawa, Masanori Saitoh, Takehara Kenichi, Hiromitsu Fujiya
  • Patent number: 9400485
    Abstract: In a cooling device that includes a cooling roller that comprises a hollow tubular member and a cooling medium transport unit for transporting a cooling liquid to the inside of the cooling roller and contacts a sheet-like member to cool down the paper, a turbulence generating unit that generates turbulence in a cooling liquid is disposed near an inner wall of the outer tube.
    Type: Grant
    Filed: November 8, 2013
    Date of Patent: July 26, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Satoshi Okano, Takayuki Nishimura, Kenichi Takehara, Yasuaki Iijima, Hiromitsu Fujiya, Tomoyasu Hirasawa, Masanori Saitoh, Shingo Suzuki, Keisuke Yuasa, Keisuke Ikeda
  • Publication number: 20160195847
    Abstract: A cooling device includes a rotatable belt extended by a plurarity of extending members that transfers a sheet in contact with the surface of the belt, and a plurality of cooling members to cool the sheet via the belt. A cooling surface of the cooling members contacts an internal surface of the transport belt. The cooling members are detachable. The cooling device also includes an adjuster to adjust a contact condition between the cooling surface and the internal surface according to the number of cooling members installed.
    Type: Application
    Filed: March 10, 2016
    Publication date: July 7, 2016
    Inventors: Keisuke IKEDA, Tomoyasu HIRASAWA, Kenichi TAKEHARA, Hiromitsu FUJIYA, Keisuke YUASA
  • Patent number: 9372465
    Abstract: A recording-material cooling device is disposed downstream from a fixing device in a transport direction of a recording material. The fixing device includes a fixing member and a pressing member to fix an unfixed toner image on the recording material. The recording-material cooling device includes a first cooling unit disposed at a same side as the pressing member relative to the recording material, a second cooling unit disposed at a same side as the fixing member relative to the recording material, and a third cooling unit disposed at the same side as the pressing member relative to the recording material. The first cooling unit, the second cooling unit, and the third cooling unit are arranged in an order of the first cooling unit, the second cooling unit, and the third cooling unit from upstream to downstream in the transport direction of the recording material.
    Type: Grant
    Filed: April 9, 2014
    Date of Patent: June 21, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Keisuke Ikeda, Tomoyasu Hirasawa, Yutaka Shoji, Kenji Ishii, Takeshi Watanabe, Susumu Tateyama, Hiroaki Miyagawa, Hiromitsu Fujiya
  • Patent number: 9360837
    Abstract: An air-conditioning unit includes an air conditioner to control air temperature, a first channel to guide air supplied from the air conditioner to a conditioning target, a heat exchange channel through which the air supplied from the air conditioner exchanges heat with the conditioning target, a second channel to guide air from the conditioning target either outside the air-conditioning unit or to the air conditioner, and a channel switching unit to cause the air conditioner to suck in either external air or the air guided from the conditioning target.
    Type: Grant
    Filed: September 12, 2013
    Date of Patent: June 7, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Tomoyasu Hirasawa, Kenichi Takehara, Hiromitsu Fujiya, Keisuke Yuasa, Yasuaki Toda, Keisuke Ikeda
  • Patent number: 9354601
    Abstract: A liquid type cooling device, which is incorporated in an image forming apparatus, includes a heat receiving part including a heat receiving unit to transport heat from a cooling target to a coolant and a heat releasing part including a heat releasing unit, a cooling fan, and an air flowing space. The heat releasing unit has a coolant flowing path and an air flowing path through which air passes and conducts heat exchange with the coolant. The air flowing space has an air inlet port and an air outlet port. When the air flowing path has an upstream region and a downstream region along a coolant flowing direction of the coolant flowing path, air at high temperature flows into the upstream region of the air flowing path. Alternatively, the heat releasing unit may have a coolant inlet port, a coolant outlet port, and the air flowing path.
    Type: Grant
    Filed: September 4, 2014
    Date of Patent: May 31, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Tomoyasu Hirasawa, Hiromitsu Fujiya, Keisuke Yuasa, Yasuaki Toda, Kenji Ishii, Susumu Tateyama, Hiroaki Miyagawa, Keisuke Ikeda
  • Patent number: 9296235
    Abstract: A cooling device includes a rotatable belt extended by a plurality of extending members that transfers a sheet in contact with the surface of the belt, and a plurality of cooling members to cool the sheet via the belt. A cooling surface of the cooling members contacts an internal surface of the transport belt. The cooling members are detachable. The cooling device also includes an adjuster to adjust a contact condition between the cooling surface and the internal surface according to the number of cooling members installed.
    Type: Grant
    Filed: April 17, 2015
    Date of Patent: March 29, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Keisuke Ikeda, Tomoyasu Hirasawa, Kenichi Takehara, Hiromitsu Fujiya, Keisuke Yuasa
  • Publication number: 20160048106
    Abstract: A recording-material cooling device includes a first belt, a first cooling unit, and a second cooling unit. The first belt is disposed at a first face side of a recording material. The first cooling unit has a first heat absorbing surface to contact the first belt to absorb heat of the recording material. The second cooling unit has a second heat absorbing surface to directly or indirectly contact the recording material to absorb heat of the recording material. The second cooling unit is disposed at a second face side of the recording material. The first and second cooling units are offset from each other in a transport direction of the recording material. Each of the first and second surfaces has a shape in which an inner area protrudes beyond opposed ends in the transport direction. The first and second surfaces overlap each other in a direction crossing the transport direction.
    Type: Application
    Filed: October 27, 2015
    Publication date: February 18, 2016
    Inventors: Tomoyasu HIRASAWA, Kenichi TAKEHARA, Hiromitsu FUJIYA, Keisuke YUASA, Yasuaki TODA, Yutaka SHOJI, Kenji ISHII, Makoto NAKURA, Susumu TATEYAMA, Hiroaki MIYAGAWA, Keisuke IKEDA, Takeshi WATANABE
  • Patent number: 9217979
    Abstract: A recording-material cooling device includes a first belt, a first cooling unit, and a second cooling unit. The first belt is disposed at a first face side of a recording material. The first cooling unit has a first heat absorbing surface to contact the first belt to absorb heat of the recording material. The second cooling unit has a second heat absorbing surface to directly or indirectly contact the recording material to absorb heat of the recording material. The second cooling unit is disposed at a second face side of the recording material. The first and second cooling units are offset from each other in a transport direction of the recording material. Each of the first and second surfaces has a shape in which an inner area protrudes beyond opposed ends in the transport direction. The first and second surfaces overlap each other in a direction crossing the transport direction.
    Type: Grant
    Filed: December 26, 2013
    Date of Patent: December 22, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Tomoyasu Hirasawa, Kenichi Takehara, Hiromitsu Fujiya, Keisuke Yuasa, Yasuaki Toda, Yutaka Shoji, Kenji Ishii, Makoto Nakura, Susumu Tateyama, Hiroaki Miyagawa, Keisuke Ikeda, Takeshi Watanabe