Patents by Inventor Hiroshi Tamemasa

Hiroshi Tamemasa 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).

  • Heat fixing member having core metal and release layer, heat and pressure fixing apparatus, and image forming apparatus
    Patent number: 6490429
    Abstract: The invention relates to a cylindrical heat fixing member in which in a fixing apparatus for fixing an unfixed toner image carried onto a recording material heats and pressurizes the recording material and which heat fixing member is formed by at least a release layer being formed on the peripheral surface of a core metal. In the heat fixing member, the thickness of the core metal is from 0.5 mm to 2.8 mm inclusive and the core metal material is an aluminum alloy that is elastically deformed by a stress of 60.0 Mpa at 210° C. The invention also relates to a heat and pressure fixing apparatus and an image formation apparatus using the heat fixing member.
    Type: Grant
    Filed: August 1, 2001
    Date of Patent: December 3, 2002
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Takahiro Okayasu, Hiroshi Tamemasa, Issei Fujihara
  • Heat fixing member, heat and pressure fixing apparatus, and image formation apparatus
    Publication number: 20020085866
    Abstract: The invention relates to a cylindrical heat fixing member in which in a fixing apparatus for fixing a unfixed toner image carried on a recording material heats and pressurizes the recording material and which heat fixing member is formed by at least a release layer being formed on the peripheral surface of a core metal. In the heat fixing member, the thickness of the core metal is from 0.5 mm to 2.8 mm inclusive and the the core metal material is an aluminum alloy that is elastically deformed by a stress of 60.0 MPa in at 210° C. The invention also relates to a heat and pressure fixing apparatus and an image formation apparatus using the heat fixing member.
    Type: Application
    Filed: August 1, 2001
    Publication date: July 4, 2002
    Applicant: Fuji Xerox Co., Ltd.
    Inventors: Takahiro Okayasu, Hiroshi Tamemasa, Issei Fujihara
  • Method of making plasma display apparatus
    Patent number: 5385631
    Abstract: The invention relates to a method of making a plasma display apparatus comprising a plurality of stripe-shaped electrodes arranged in a matrix, a dot-shaped discharge area or pixel area at each solid intersection between said stripe-shaped electrodes and a fluorescent film formed on each of said discharge areas and adapted to emit light when said fluorescent film is excited by ultraviolet rays from the corresponding discharge area.
    Type: Grant
    Filed: August 20, 1993
    Date of Patent: January 31, 1995
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Hiroshi Tamemasa, Carl B. Wang
  • Reduction process for preparing copper, silver, and admixed silver-palladium metal particles
    Patent number: 4863510
    Abstract: Fine particles of a metal such as copper and silver can be obtained by reducing the corresponding metal compound solution with one or more reducing agents selected from the group consisting of L-ascorbic acid, L-ascorbate, D-erythorbic acid and D-erythorbate. Silver-palladium composite particles can also be obtained similarly by employing a colloidal palladium liquid and a silver compound solution.
    Type: Grant
    Filed: July 27, 1988
    Date of Patent: September 5, 1989
    Assignee: Tanaka Kikinzoku Kogyo K.K.
    Inventors: Hiroshi Tamemasa, Hiroshi Makino, Tadao Nagai