Patents by Inventor Tsuneaki Kondoh

Tsuneaki Kondoh 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: 20140241770
    Abstract: A fixing member used for fixing toner includes a base, an elastic layer provided on an outer circumference of the base, and a release layer provided on an outer circumference of the elastic layer. The elastic layer includes silicone rubber, carbon fibers, saturated hydrocarbon having a liquid form at room temperature, and hole portions.
    Type: Application
    Filed: February 3, 2014
    Publication date: August 28, 2014
    Applicant: RICOH COMPANY, LTD.
    Inventors: Yuko ARIZUMI, Tomoaki SUGAWARA, Tsuneaki KONDOH, Junichiro NATORI
  • Publication number: 20140205334
    Abstract: A pressing member includes a heat resistant material, highly heat conductive needle shaped fillers included in the heat resistant material, and hole portions included in the heat resistant material. The pressing member is provided in a fixing device including a fixing member, a heating member to heat the fixing member, and a pressure roller. The pressing member is arranged to press the fixing member and form a nip portion between the fixing member and the pressure roller through which a recording sheet passes.
    Type: Application
    Filed: January 16, 2014
    Publication date: July 24, 2014
    Applicant: RICOH COMPANY, LTD.
    Inventors: Tsuneaki Kondoh, Tomoaki SUGAWARA, Yuko ARIZUMI, Junichiro NATORI
  • Publication number: 20140199102
    Abstract: A fixing member for electrophotographic fixing includes a base body; an elastic layer; and an outermost surface releasing layer. The elastic layer and the outermost surface releasing layer are laminated on the base body. The elastic layer is a continuous layer including fibrous filler distributed in a portion of the elastic layer towards the outermost surface releasing layer.
    Type: Application
    Filed: January 7, 2014
    Publication date: July 17, 2014
    Applicant: RICOH COMPANY, LTD.
    Inventors: Tomoaki Sugawara, Tsuneaki Kondoh, Junichiro Natori
  • Publication number: 20130322942
    Abstract: To provide a fixing member, which contains a base, and a polyorganosiloxane layer provided on the base, where the polyoranosiloxane layer contains polyoranosiloxane including a silicon atom bonded to three or four oxygen atoms, and wherein the fixing member is designed to be used in a process for heating a toner image on a recording medium to fix the toner image onto the recording medium.
    Type: Application
    Filed: February 24, 2012
    Publication date: December 5, 2013
    Applicant: RICOH COMPANY, LTD.
    Inventors: Tsuneaki Kondoh, Tomoaki Sugawara, Junichiro Natori
  • Patent number: 8380113
    Abstract: A fixing member including a substrate and an elastic layer provided on a surface of the substrate. The elastic layer includes a fluorosilicone rubber including carbon fibers and voids.
    Type: Grant
    Filed: November 13, 2009
    Date of Patent: February 19, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Junichiro Natori, Tsuneaki Kondoh, Tomoaki Sugawara
  • Publication number: 20120322967
    Abstract: To provide a fixing member, which contains an outermost layer formed of an elastic material, where the fixing member is used in a process for fixing a toner image on a recording medium by heating, and the outermost layer has peel strength of 20 N/cm2 or lower.
    Type: Application
    Filed: June 20, 2012
    Publication date: December 20, 2012
    Inventors: Tsuneaki KONDOH, Junichiro Natori, Tomoaki Sugawara
  • Patent number: 8309172
    Abstract: A method and a device for coating a hollow cylindrical member. The method includes radially coating an entire inner surface of the hollow cylindrical member with a first coating material discharged by a first slit nozzle and simultaneously circularly coating an entire outer surface of the hollow cylindrical member with a second coating material discharged in an axial direction of the hollow cylindrical member by a second slit nozzle located opposite the first slit nozzle with the hollow cylindrical member therebetween. The first slit nozzle and the second slit nozzle discharge the first coating material and the second coating material, respectively, to a same height of the hollow cylindrical member relative to the inner surface and the outer surface thereof.
    Type: Grant
    Filed: June 9, 2008
    Date of Patent: November 13, 2012
    Assignee: Ricoh Company, Ltd.
    Inventors: Michitaka Higaki, Takayuki Yoshii, Tsuneaki Kondoh, Kohji Kamiya, Hidenori Machida, Satoshi Tohkai
  • Patent number: 8301068
    Abstract: To provide a fixing member for fixing to a recording medium an unfixed image formed with a developer, the fixing member including: a base material; an elastic layer which is provided outside the base material and has an elastic deformation property; and a release layer which is provided outside the elastic layer and promotes separation of the recording medium from the fixing member, wherein the release layer has a plurality of through-holes formed between its front surface and its surface on the opposite side to the front surface, and part of the elastic layer in contact with the release layer can fill the through-holes upon provision of pressure for fixing the unfixed image to the recording medium.
    Type: Grant
    Filed: October 30, 2009
    Date of Patent: October 30, 2012
    Assignee: Ricoh Company, Ltd.
    Inventors: Tsuneaki Kondoh, Junichiro Natori, Tomoaki Sugawara
  • Patent number: 7945199
    Abstract: A fixing device including a heating roller; a fixing roller facing the heating roller; a fixing belt wound between the heating roller and the fixing roller, and including, a cylindrical substrate, and an elastic layer provided on or above the substrate except at end parts of the substrate; a pressure roller configured to press the fixing roller through the fixing belt; and a separation part configured to separate media from the fixing belt.
    Type: Grant
    Filed: November 7, 2007
    Date of Patent: May 17, 2011
    Inventors: Tsuneaki Kondoh, Hidenori Machida, Kohji Kamiya
  • Publication number: 20100129123
    Abstract: A fixing member including a substrate and an elastic layer provided on a surface of the substrate. The elastic layer includes a fluorosilicone rubber including carbon fibers and voids.
    Type: Application
    Filed: November 13, 2009
    Publication date: May 27, 2010
    Inventors: Junichiro Natori, Tsuneaki Kondoh, Tomoaki Sugawara
  • Publication number: 20100119269
    Abstract: To provide a fixing member for fixing to a recording medium an unfixed image formed with a developer, the fixing member including: a base material; an elastic layer which is provided outside the base material and has an elastic deformation property; and a release layer which is provided outside the elastic layer and promotes separation of the recording medium from the fixing member, wherein the release layer has a plurality of through-holes formed between its front surface and its surface on the opposite side to the front surface, and part of the elastic layer in contact with the release layer can fill the through-holes upon provision of pressure for fixing the unfixed image to the recording medium.
    Type: Application
    Filed: October 30, 2009
    Publication date: May 13, 2010
    Applicant: RICOH COMPANY, LTD.
    Inventors: Tsuneaki Kondoh, Junichiro Natori, Tomoaki Sugawara
  • Patent number: 7643784
    Abstract: A fixing apparatus including at least one transfer and fixing member which is placed in contact with an image carrier and a recording medium and configured to transfer and fix an image on the image carrier to the recording medium, at least detection mechanism configured to detect a jam generated on the recording medium, a separation mechanism configured to contact the transfer and fixing member with and separate from the transfer and fixing member from the image carrier or recording medium, the separation mechanism being configured to separate the transfer and fixing member from the image carrier or recording medium when the jam on the recording medium is detected by the detection mechanism.
    Type: Grant
    Filed: February 28, 2006
    Date of Patent: January 5, 2010
    Assignee: Ricoh Company, Ltd.
    Inventors: Tsuneaki Kondoh, Takayuki Yoshii, Michitaka Higaki, Kohji Kamiya, Eiji Sawamura
  • Patent number: 7539450
    Abstract: An image fixing apparatus stably maintains high efficiency in heat generation and reduces loss of electric power consumption for fixing an image, which includes a coil member to generate a magnetic flux, a heat member to generate heat with the magnetic flux, and a support member to support the coil member so that the coil member faces a front and a back side of the heat member, wherein the support member includes a heat dissipation part that releases heat generated in the coil member.
    Type: Grant
    Filed: December 19, 2006
    Date of Patent: May 26, 2009
    Assignee: Ricoh Company, Ltd.
    Inventors: Norihiko Aze, Machida Hidenori, Tsuneaki Kondoh, Satoshi Tohkai
  • Publication number: 20080311293
    Abstract: A method and a device for coating a hollow cylindrical member. The method includes radially coating an entire inner surface of the hollow cylindrical member with a first coating material discharged by a first slit nozzle and simultaneously circularly coating an entire outer surface of the hollow cylindrical member with a second coating material discharged in an axial direction of the hollow cylindrical member by a second slit nozzle located opposite the first slit nozzle with the hollow cylindrical member therebetween. The first slit nozzle and the second slit nozzle discharge the first coating material and the second coating material, respectively, to a same height of the hollow cylindrical member relative to the inner surface and the outer surface thereof.
    Type: Application
    Filed: June 9, 2008
    Publication date: December 18, 2008
    Inventors: Michitaka Higaki, Takayuki Yoshii, Tsuneaki Kondoh, Kohji Kamiya, Hidenori Machida, Satoshi Tohkai
  • Publication number: 20080138123
    Abstract: A fixing device including a heating roller; a fixing roller facing the heating roller; a fixing belt wound between the heating roller and the fixing roller, and including, a cylindrical substrate, and a elastic layer provided on or above the substrate except at end parts of the substrate; a pressure roller configure to press the fixing roller through the fixing belt; and a separation part configured to separate media from the fixing belt.
    Type: Application
    Filed: November 7, 2007
    Publication date: June 12, 2008
    Inventors: Tsuneaki Kondoh, Hidenori Machida, Kohji Kamiya
  • Publication number: 20080063444
    Abstract: In a fixing member having an elastic layer of heat resistance rubber provided on a substrate and a separation layer of fluorocarbon resin provided on the elastic layer, the fluorocarbon resin is that a tensile strength of a 30 ?m coating film burned at 340° C. is equal or greater than 25 MPa. The heat resistance rubber includes, for example, silicone rubber or fluorosilicone rubber as a major component. The fluorocarbon resin includes PFA as a major component, for example.
    Type: Application
    Filed: October 23, 2007
    Publication date: March 13, 2008
    Inventors: Tsuneaki Kondoh, Kyoichi Ashikawa, Takuzo Kurachi, Norihiko Aze, Kohji Kamiya, Takayuki Yoshii, Nozomu Takahata, Atsushi Ishibe, Hidenori Machida
  • Publication number: 20070140758
    Abstract: An image fixing apparatus stably maintains high efficiency in heat generation and reduces loss of electric power consumption for fixing an image, which includes a coil member to generate a magnetic flux, a heat member to generate heat with the magnetic flux, and a support member to support the coil member so that the coil member faces a front and a back side of the heat member, wherein the support member includes a heat dissipation part that releases heat generated in the coil member.
    Type: Application
    Filed: December 19, 2006
    Publication date: June 21, 2007
    Inventors: Norihiko Aze, Machida Hidenori, Tsuneaki Kondoh, Satoshi Tohkai
  • Patent number: 7146126
    Abstract: A fixing member includes a base member and an outermost layer located overlying the base member and having different fluororesins to fix a toner onto a sheet.
    Type: Grant
    Filed: March 18, 2005
    Date of Patent: December 5, 2006
    Assignee: Ricoh Company, Limited
    Inventors: Takayuki Yoshii, Tsuneaki Kondoh, Kohji Kamiya
  • Publication number: 20060198666
    Abstract: A fixing apparatus including at least one transfer and fixing member which is placed in contact with an image carrier and a recording medium and configured to transfer and fix an image on the image carrier to the recording medium, at least detection mechanism configured to detect a jam generated on the recording medium, a separation mechanism configured to contact the transfer and fixing member with and separate from the transfer and fixing member from the image carrier or recording medium, the separation mechanism being configured to separate the transfer and fixing member from the image carrier or recording medium when the jam on the recording medium is detected by the detection mechanism.
    Type: Application
    Filed: February 28, 2006
    Publication date: September 7, 2006
    Inventors: Tsuneaki Kondoh, Takayuki Yoshii, Michitaka Higaki, Kohji Kamiya, Eiji Sawamura
  • Publication number: 20050207806
    Abstract: A fixing member includes a base member and an outermost layer located overlying the base member and having different fluororesins to fix a toner onto a sheet.
    Type: Application
    Filed: March 18, 2005
    Publication date: September 22, 2005
    Inventors: Takayuki Yoshii, Tsuneaki Kondoh, Kohji Kamiya