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).
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Patent number: 9217979Abstract: 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: GrantFiled: December 26, 2013Date of Patent: December 22, 2015Assignee: 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
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Publication number: 20150277304Abstract: 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: ApplicationFiled: June 1, 2015Publication date: October 1, 2015Inventors: Keisuke IKEDA, Satoshi OKANO, Tomoyasu HIRASAWA, Masanori SAITOH, Takehara KENICHI, Hiromitsu FUJIYA
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Publication number: 20150227111Abstract: 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: ApplicationFiled: April 23, 2015Publication date: August 13, 2015Inventors: Keisuke IKEDA, Tomoyasu HIRASAWA, Kenichi TAKEHARA, Hiromitsu FUJIYA, Keisuke YUASA, Yasuaki TODA, Susumu TATEYAMA, Hiroaki MIYAGAWA, Kenji ISHII, Takeshi WATANABE
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Publication number: 20150217586Abstract: 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: ApplicationFiled: April 17, 2015Publication date: August 6, 2015Inventors: Keisuke IKEDA, Tomoyasu HIRASAWA, Kenichi TAKEHARA, Hiromitsu FUJIYA, Keisuke YUASA
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Patent number: 9098024Abstract: 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: GrantFiled: April 2, 2014Date of Patent: August 4, 2015Assignee: Ricoh Company, Ltd.Inventors: Keisuke Ikeda, Satoshi Okano, Tomoyasu Hirasawa, Masanori Saitoh, Takehara Kenichi, Hiromitsu Fujiya
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Patent number: 9046858Abstract: 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: GrantFiled: December 26, 2013Date of Patent: June 2, 2015Assignee: Ricoh Company, Ltd.Inventors: Keisuke Ikeda, Tomoyasu Hirasawa, Kenichi Takehara, Hiromitsu Fujiya, Keisuke Yuasa, Yasuaki Toda, Susumu Tateyama, Hiroaki Miyagawa, Kenji Ishii, Takeshi Watanabe
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Patent number: 9046872Abstract: A cooling device includes a cooling member to cool a recording material. The cooling member includes a cooling surface member, a heat exchanging member, and a fastening member. The cooling surface member has a cooling surface to directly or indirectly contact the recording material and absorb heat of the recording material to cool the recording material. The heat exchanging member is directly or indirectly joined to the cooling surface member to radiate heat absorbed by the cooling surface member directly or indirectly via a radiation member. The fastening member fastens the cooling surface member and the heat exchanging member to retain a joined state in which the cooling surface member and the heat exchanging member are directly or indirectly joined to each other. The cooling surface member and the heat exchanging member are separable from the joined state to a separated state without damaging the fastening member.Type: GrantFiled: February 18, 2014Date of Patent: June 2, 2015Assignee: Ricoh Company, Ltd.Inventors: Keisuke Ikeda, Makoto Nakura, Susumu Tateyama, Hiroaki Miyagawa, Yasuaki Toda, Yutaka Shoji, Kenji Ishii, Kenichi Takehara, Hiromitsu Fujiya, Keisuke Yuasa, Shinji Kato, Tomoyasu Hirasawa
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Patent number: 9044982Abstract: 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: GrantFiled: August 2, 2013Date of Patent: June 2, 2015Assignee: RICOH COMPANY, LTD.Inventors: Keisuke Ikeda, Tomoyasu Hirasawa, Kenichi Takehara, Hiromitsu Fujiya, Keisuke Yuasa
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Publication number: 20150071677Abstract: 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: ApplicationFiled: September 4, 2014Publication date: March 12, 2015Inventors: Tomoyasu HIRASAWA, Hiromitsu FUJIYA, Keisuke YUASA, Yasuaki TODA, Kenji ISHII, Susumu TATEYAMA, Hiroaki MIYAGAWA, Keisuke IKEDA
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Patent number: 8977159Abstract: An image forming apparatus includes an air-conditioning section to control at least one of temperature and humidity of air, a first passage to guide the air sent off by the air-conditioning section to a temperature-controlled portion in the image forming apparatus, an air-intake section to take in the air from outside of the image forming apparatus, and a second passage to guide the air taken in by the air-intake section to the temperature-controlled portion.Type: GrantFiled: May 30, 2013Date of Patent: March 10, 2015Assignee: Ricoh Company, Ltd.Inventors: Kenichi Takehara, Hiromitsu Fujiya, Keisuke Yuasa, Tomoyasu Hirasawa, Keisuke Ikeda, Yasuaki Toda
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Publication number: 20140308058Abstract: 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: ApplicationFiled: April 9, 2014Publication date: October 16, 2014Inventors: Keisuke IKEDA, Tomoyasu HIRASAWA, Yutaka SHOJI, Kenji ISHII, Takeshi WATANABE, Susumu TATEYAMA, Hiroaki MIYAGAWA, Hiromitsu FUJIYA
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Publication number: 20140233996Abstract: A cooling device includes a cooling member to cool a recording material. The cooling member includes a cooling surface member, a heat exchanging member, and a fastening member. The cooling surface member has a cooling surface to directly or indirectly contact the recording material and absorb heat of the recording material to cool the recording material. The heat exchanging member is directly or indirectly joined to the cooling surface member to radiate heat absorbed by the cooling surface member directly or indirectly via a radiation member. The fastening member fastens the cooling surface member and the heat exchanging member to retain a joined state in which the cooling surface member and the heat exchanging member are directly or indirectly joined to each other. The cooling surface member and the heat exchanging member are separable from the joined state to a separated state without damaging the fastening member.Type: ApplicationFiled: February 18, 2014Publication date: August 21, 2014Inventors: Keisuke IKEDA, Makoto NAKURA, Susumu TATEYAMA, Hiroaki MIYAGAWA, Yasuaki TODA, Yutaka SHOJI, Kenji ISHII, Kenichi TAKEHARA, Hiromitsu FUJIYA, Keisuke YUASA, Shinji KATO, Tomoyasu HIRASAWA
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Patent number: 8805231Abstract: Of a cooling device that is for use in an image forming apparatus and that includes: a heat receiving unit that receives heat from a cooling target and that is disposed to come into and away from contact with the cooling target; a heat radiating unit that radiates the heat received by the heat receiving unit; a heat conductive member disposed on at least one of a surface of the heat receiving unit on the side facing the cooling target and a surface of the cooling target on the side facing the heat receiving unit; and a protection member that is disposed on the heat conductive member to protect the heat conductive member, the protection member is substantially incompatible with binder resin of toner for use in the image forming apparatus.Type: GrantFiled: January 6, 2011Date of Patent: August 12, 2014Assignee: Ricoh Company, LimitedInventors: Shingo Suzuki, Satoshi Okano, Masanori Saitoh, Tomoyasu Hirasawa, Keisuke Ikeda, Kenichi Takehara, Yasuaki Iijima, Hiromitsu Fujiya, Keisuke Yuasa
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Publication number: 20140219677Abstract: 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: ApplicationFiled: April 2, 2014Publication date: August 7, 2014Inventors: Keisuke IKEDA, Satoshi OKANO, Tomoyasu HIRASAWA, Masanori SAITOH, Takehara KENICHI, Hiromitsu FUJIYA
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Patent number: 8792800Abstract: A cooling device using a liquid coolant, including a heat receiving part separatably contactable to a target to be cooled detachably installable in an image forming apparatus, a heat releasing part to release heat from the liquid coolant, a circulation channel through which the liquid coolant is circulated between the heat receiving part and the heat releasing part, and a pump operatively connected to the circulation channel to convey the liquid coolant through the circulation channel. The circulation channel has a flexible part and a metal part continuous with the flexible part.Type: GrantFiled: March 22, 2012Date of Patent: July 29, 2014Assignee: Ricoh Company, Ltd.Inventors: Hiromitsu Fujiya, Satoshi Okano, Masanori Saitoh, Tomoyasu Hirasawa, Keisuke Ikeda, Kenichi Takehara
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Publication number: 20140186080Abstract: 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: ApplicationFiled: December 26, 2013Publication date: July 3, 2014Inventors: Keisuke Ikeda, Tomoyasu Hirasawa, Kenichi Takehara, Hiromitsu Fujiya, Keisuke Yuasa, Yasuaki Toda, Susumu Tateyama, Hiroaki Miyagawa, Kenji Ishii, Takeshi Watanabe
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Publication number: 20140186081Abstract: 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: ApplicationFiled: December 26, 2013Publication date: July 3, 2014Inventors: Tomoyasu Hirasawa, Kenichi Takehara, Hiromitsu Fujiya, Keisuke Yuasa, Yasuaki Toda, Yutaka Shoji, Kenji Ishii, Makoto Nakura, Susumu Tateyama, Hiroaki Miyagawa, Keisuke Ikeda, Takeshi Watanabe
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Patent number: 8725026Abstract: 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: GrantFiled: May 3, 2012Date of Patent: May 13, 2014Assignee: Ricoh Company, Ltd.Inventors: Keisuke Ikeda, Satoshi Okano, Tomoyasu Hirasawa, Masanori Saitoh, Takehara Kenichi, Hiromitsu Fujiya
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Publication number: 20140093269Abstract: 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: ApplicationFiled: September 12, 2013Publication date: April 3, 2014Inventors: Tomoyasu HIRASAWA, Kenichi Takehara, Hiromitsu Fujiya, Keisuke Yuasa, Yasuaki Toda, Keisuke Ikeda
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Patent number: 8687999Abstract: A liquid-cooling-type cooling device includes a circulatory path for coolant that cools a temperature rise portion; a heat absorbing unit that absorbs a heat from the temperature rise portion by the coolant; a heat radiating unit that radiate the heat from the coolant; a pump that circulates the coolant; and a plurality of liquid-contacting metal portions that comes into contact with the coolant, each of the liquid-contacting metal portions being made of a metal material. At least one of the liquid-contacting metal portions is grounded.Type: GrantFiled: August 30, 2011Date of Patent: April 1, 2014Assignee: Ricoh Company, LimitedInventors: Satoshi Okano, Kenichi Takehara, Yasuaki Iijima, Hiromitsu Fujiya, Keisuke Yuasa, Tomoyasu Hirasawa, Masanori Saitoh, Shingo Suzuki, Keisuke Ikeda