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: 8682204
    Abstract: An image forming apparatus includes an image forming unit that creates an image and a liquid cooling unit. The liquid cooling unit includes a heat receiving disposed in contact with a temperature rising portion, in the image forming unit, in which a temperature rises due to an image forming operation by the image forming unit, a heat radiating unit that radiates heat of a cooling liquid, a flow passage forming member that allows the cooling liquid to circulate between the heat receiving unit and the heat radiating unit, and a conveying unit that conveys the cooling liquid through the flow passage forming member. The heat radiating unit includes a radiator, and the radiator is disposed at a downstream side of the conveying unit in a cooling liquid flow direction and at an upstream side of the heat receiving unit in the cooling liquid flow direction.
    Type: Grant
    Filed: December 21, 2010
    Date of Patent: March 25, 2014
    Assignee: Ricoh Company, Limited
    Inventors: Hiromitsu Fujiya, Kenichi Takehara, Yasuaki Iijima, Keisuke Yuasa, Satoshi Okano, Masanori Saitoh, Shingo Suzuki, Tomoyasu Hirasawa
  • Publication number: 20140060782
    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: Application
    Filed: August 2, 2013
    Publication date: March 6, 2014
    Inventors: Keisuke IKEDA, Tomoyasu Hirasawa, Kenichi Takehara, Hiromitsu Fujiya, Keisuke Yuasa
  • Publication number: 20140064775
    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: Application
    Filed: November 8, 2013
    Publication date: March 6, 2014
    Inventors: Satoshi Okano, Takayuki Nishimura, Kenichi Takehara, Yasuaki Iijima, Hiromitsu Fujiya, Tomoyasu Hirasawa, Masanori Saitoh, Shingo Suzuki, Keisuke Yuasa, Keisuke Ikeda
  • Publication number: 20140044462
    Abstract: A cooling device for use in an image forming apparatus, disposed downstream within the apparatus in a direction of conveyance of a sheet from a fixing device that fixes an image onto the sheet at a temperature corresponding to a sheet type, includes a conveyance part to convey the sheet, a cooling member to absorb heat by thermal conduction from the sheet being conveyed by the conveyance part, a temperature controller to control a temperature of the cooling member, a temperature detector to detect the temperature of the cooling member, and a control unit connected to the temperature controller and the temperature detector to control the cooling member, using the temperature controller, to a target temperature corresponding to the sheet type based on the temperature of the cooling member detected by the temperature detector.
    Type: Application
    Filed: July 25, 2013
    Publication date: February 13, 2014
    Applicant: RICOH COMPANY, LTD.
    Inventors: Keisuke IKEDA, Tomoyasu HIRASAWA, Kenichi TAKEHARA, Hiromitsu FUJIYA, Keisuke YUASA, Yasuaki TODA
  • Patent number: 8606138
    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: July 27, 2010
    Date of Patent: December 10, 2013
    Assignee: Ricoh Company, Limited
    Inventors: Satoshi Okano, Takayuki Nishimura, Kenichi Takehara, Yasuaki Iijima, Hiromitsu Fujiya, Tomoyasu Hirasawa, Masanori Saitoh, Shingo Suzuki, Keisuke Yuasa, Keisuke Ikeda
  • Publication number: 20130322915
    Abstract: 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: Application
    Filed: May 30, 2013
    Publication date: December 5, 2013
    Inventors: Kenichi TAKEHARA, Hiromitsu Fujiya, Keisuke Yuasa, Tomoyasu Hirasawa, Keisuke Ikeda, Yasuaki Toda
  • Patent number: 8571437
    Abstract: A cooling device includes a heat receiving unit disposed to contact a surface of a temperature-increasing part the temperature of which increases during an image forming process; a radiation unit transferring heat from a cooling liquid; a tube for circulating the cooling liquid between the heat receiving unit and the radiation unit in a liquid circulation direction; a conveying unit conveying the cooling liquid through the tube; a coupling having an internal flow path and including a first end to which a first part of the tube is connected and a second end to which a second part of the tube is connected; and an outlet for draining the cooling liquid from the tube. At least one of the first part of the tube and the second part of the tube extends to a position lower than the position of the coupling.
    Type: Grant
    Filed: December 22, 2010
    Date of Patent: October 29, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Tomoyasu Hirasawa, Satoshi Okano, Masanori Saitoh, Shingo Suzuki, Kenichi Takehara, Yasuaki Iijima, Hiromitsu Fujiya, Keisuke Yuasa
  • Patent number: 8521053
    Abstract: Disclosed is a cooling device that includes a cooling part that is movably provided between a first position and a second position different from the first position with respect to an image forming apparatus main body and cools a periphery thereof with a cooling medium to be supplied; a cooling medium supply part that is provided in the image forming apparatus main body and cools and supplies the cooling medium to the cooling part; and a connecting member that connects the cooling part to the cooling medium supply part to circulate the cooling medium between the cooling part and the cooling medium supply part; wherein the connecting member is configured to include a flexible member and spirally provided with a moving direction of the cooling part as an axis center.
    Type: Grant
    Filed: August 27, 2010
    Date of Patent: August 27, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Yasuaki Iijima, Kenichi Takehara, Hiromitsu Fujiya, Takayuki Nishimura, Satoshi Okano, Tomoyasu Hirasawa, Masanori Saitoh, Shingo Suzuki
  • Patent number: 8412068
    Abstract: A cooling device is disclosed. The cooling device includes a cooling section which is moveably provided with respect to an image forming device body between a first location and a second location, the second location being different from the first location, and which cools surroundings with a cooling medium to be supplied; a cooling medium supply section which is provided at the image forming device body and which cools the cooling medium to supply the cooled cooling medium to the cooling section; and a connecting member which connects the cooling section and the cooling medium supply section to circulate the cooling medium between the cooling section and the cooling medium supply section, wherein the connecting member includes a flexible member and is supported by a guiding member which guides an operation of tracking the connecting member in conjunction with movement of the cooling section.
    Type: Grant
    Filed: August 20, 2010
    Date of Patent: April 2, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Takayuki Nishimura, Kenichi Takehara, Yasuaki Iijima, Hiromitsu Fujiya, Satoshi Okano, Tomoyasu Hirasawa, Masanori Saitoh, Shingo Suzuki, Takahiro Ogino
  • Patent number: 8351817
    Abstract: A cooling device includes a cooling roller having a dual tube structure including an inner tube disposed inside an outer tube, an outside flow passage and an inside flow passage in which a cooling medium flows, and an opening that allows the outside flow passage to communicate with the inside flow passage, a cooling medium transport unit, and a rotating tube joint unit mounted to one end side of the cooling roller. One end of the outer tube is coaxially rotatably fitted to a first fitting section of the rotating tube joint unit. One end of the inner tube is coaxially fitted into and rotatably or fixedly supported to a second fitting section of the rotating tube joint unit, and the other end is coaxially fitted into and rotatably or fixedly supported to a fitting section on the other end of the outer tube.
    Type: Grant
    Filed: August 16, 2010
    Date of Patent: January 8, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Masanori Saitoh, Satoshi Okano, Tomoyasu Hirasawa, Shingo Suzuki, Kenichi Takehara, Yasuaki Iijima, Takayuki Nishimura, Hiromitsu Fujiya, Keisuke Yuasa
  • Publication number: 20120315069
    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: Application
    Filed: May 3, 2012
    Publication date: December 13, 2012
    Inventors: KEISUKE IKEDA, SATOSHI OKANO, TOMOYASU HIRASAWA, MASANORI SAITOH, TAKEHARA KENICHI, HIROMITSU FUJIYA
  • Publication number: 20120263491
    Abstract: 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: Application
    Filed: March 22, 2012
    Publication date: October 18, 2012
    Inventors: Hiromitsu FUJIYA, Satoshi Okano, Masanori Saitoh, Tomoyasu Hirasawa, Keisuke Ikeda, Kenichi Takehara
  • Publication number: 20120227927
    Abstract: A cooling device includes a heat receiving unit arranged to contact with a cooling target to receive heat of the cooling target; a heat radiating unit configured to radiate heat of coolant; a tank configured to store therein the coolant; a circulating path configured to circulate the coolant through the heat receiving unit, the heat radiating unit, and the tank; a pump configured to transfer the coolant in the circulating path; and a liquid transfer detecting unit configured to detect liquid transfer of the coolant. The liquid transfer detecting unit includes a detector arranged above a liquid level of the coolant stored in the tank at a position where the coolant having flowed into the tank is hit when the coolant is transferred. The detector is arranged so as to be visible from the outside of the tank.
    Type: Application
    Filed: March 8, 2012
    Publication date: September 13, 2012
    Inventors: Hiromitsu FUJIYA, Satoshi Okano, Tomoyasu Hirasawa, Masanori Saitoh, Keisuke Ikeda, Kenichi Takehara, Yasuaki Iijima, Keisuke Yuasa
  • Patent number: 8254803
    Abstract: An image forming apparatus including a target part to be cooled detachably attachable to the image forming apparatus, a cooling device including a heat receiving part provided to contact the target part to be cooled to receive heat from the target part to be cooled with a cooling medium provided within the heat receiving part, and a contact/separation mechanism to cause the heat receiving part to contact and separate from the target part to be cooled. The contact/separation mechanism includes a pressing unit to press the heat receiving part against the target part to be cooled. A reaction of a pressing force of the heat receiving part applied to the pressing unit when the heat receiving part is pressed against the target part to be cooled is directed onto a predetermined portion of the target part to be cooled.
    Type: Grant
    Filed: November 12, 2009
    Date of Patent: August 28, 2012
    Assignee: Ricoh Company, Limited
    Inventors: Hiromitsu Fujiya, Kenichi Takehara, Yasuaki Iijima, Takayuki Nishimura, Satoshi Okano, Tomoyasu Hirasawa, Shingo Suzuki, Masanori Saitoh
  • Publication number: 20120070180
    Abstract: A cooling device to cool an apparatus includes a heat receiver to receive heat from a hot portion of the apparatus using a coolant while contacting the hot portion, a heat releaser to cool the heat-received coolant to release the heat from the hot portion to outside the apparatus, the heat releaser having a variable-speed fan of multiple operation speed modes including an off mode, a coolant circulation system through which the coolant is circulated between the heat receiver and the heat releaser, a variable-speed pump to move the coolant through the coolant circulation system, whose operation speed modes include an off mode and relate to a coolant flow rate of the pump, a temperature sensor to detect a temperature in the hot portion, and a controller to control the operation modes of the fan and the pump in accordance with the temperature detected by the temperature sensor.
    Type: Application
    Filed: September 14, 2011
    Publication date: March 22, 2012
    Inventors: Yasuaki IIJIMA, Satoshi Okano, Tomoyasu Hirasawa, Masanori Saitoh, Shingo Suzuki, Keisuke Ikeda, Kenichi Takehara, Hiromitsu Fujiya, Keisuke Yuasa
  • Publication number: 20120061057
    Abstract: 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: Application
    Filed: August 30, 2011
    Publication date: March 15, 2012
    Applicant: Ricoh Company, Limited
    Inventors: Satoshi Okano, Kenichi Takehara, Yasuaki Iijima, Hiromitsu Fujiya, Keisuke Yuasa, Tomoyasu Hirasawa, Masanori Saitoh, Shingo Suzuki, Keisuke Ikeda
  • Patent number: 8068759
    Abstract: An image forming apparatus includes an image forming unit including an image carrier and a development device, a transfer unit to transfer an image formed on the image carrier onto a sheet, a fixing device to fix the image on the sheet, a sheet transport unit, a sheet stack portion, an air duct, and a first liquid-cooling device. The first liquid-cooling device includes a first heat receiving member disposed in thermal contact with a first heated portion, a first heat releaser, a first circulation pipe connecting the first heat receiving member and the first heat releaser to circulate a coolant therebetween, a first transport member to transport the coolant through the first circulation pipe, and an airflow generator to generate an airflow with external air to cool the first heat releaser. The air duct guides the air taken in by the airflow generator to a second heated portion.
    Type: Grant
    Filed: November 18, 2009
    Date of Patent: November 29, 2011
    Assignee: Ricoh Company Limited
    Inventors: Kenichi Takehara, Yasuaki Iijima, Hiromitsu Fujiya, Takayuki Nishimura, Satoshi Okano, Tomoyasu Hirasawa, Shingo Suzuki, Masanori Saitoh
  • Publication number: 20110188880
    Abstract: 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: Application
    Filed: January 6, 2011
    Publication date: August 4, 2011
    Applicant: RICOH COMPANY, LIMITED
    Inventors: Shingo Suzuki, Satoshi Okano, Masanori Saitoh, Tomoyasu Hirasawa, Keisuke Ikeda, Kenichi Takehara, Yasuaki Iijima, Hiromitsu Fujiya, Keisuke Yuasa
  • Publication number: 20110170895
    Abstract: An image forming apparatus includes an image forming unit that creates an image and a liquid cooling unit. The liquid cooling unit includes a heat receiving disposed in contact with a temperature rising portion, in the image forming unit, in which a temperature rises due to an image forming operation by the image forming unit, a heat radiating unit that radiates heat of a cooling liquid, a flow passage forming member that allows the cooling liquid to circulate between the heat receiving unit and the heat radiating unit, and a conveying unit that conveys the cooling liquid through the flow passage forming member. The heat radiating unit includes a radiator, and the radiator is disposed at a downstream side of the conveying unit in a cooling liquid flow direction and at an upstream side of the heat receiving unit in the cooling liquid flow direction.
    Type: Application
    Filed: December 21, 2010
    Publication date: July 14, 2011
    Applicant: Ricoh Company, Limited
    Inventors: Hiromitsu Fujiya, Kenichi Takehara, Yasuaki Iijima, Keisuke Yuasa, Satoshi Okano, Masanori Saitoh, Shingo Suzuki, Tomoyasu Hirasawa
  • Publication number: 20110164896
    Abstract: A cooling device includes a heat receiving unit disposed to contact a surface of a temperature-increasing part the temperature of which increases during an image forming process; a radiation unit transferring heat from a cooling liquid; a tube for circulating the cooling liquid between the heat receiving unit and the radiation unit in a liquid circulation direction; a conveying unit conveying the cooling liquid through the tube; a coupling having an internal flow path and including a first end to which a first part of the tube is connected and a second end to which a second part of the tube is connected; and an outlet for draining the cooling liquid from the tube. At least one of the first part of the tube and the second part of the tube extends to a position lower than the position of the coupling.
    Type: Application
    Filed: December 22, 2010
    Publication date: July 7, 2011
    Applicant: Ricoh Company, Ltd.
    Inventors: Tomoyasu Hirasawa, Satoshi Okano, Masanori Saitoh, Shingo Suzuki, Kenichi Takehara, Yasuaki Iijima, Hiromitsu Fujiya, Keisuke Yuasa