Patents by Inventor Hisakazu Hujimoto

Hisakazu Hujimoto 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).

  • Method for forming a ceramic laminate
    Patent number: 7698812
    Abstract: A method for forming a ceramic laminate ceramic laminate from first and second sheets of ceramic material, the sheets having a first and a second surface, wherein the first ceramic material has a different coefficient of thermal expansion than the second ceramic material and the outer layers comprises ceramic materials having substantially the same thermal properties, comprising (a) heating the first and the second sheets of ceramic material; (b) stacking the first and the second sheets of ceramic material wherein the second surfaces are opposed to one another to provide stacked sheets; and (c) pressing the stacked sheets and forming the ceramic laminate.
    Type: Grant
    Filed: October 14, 2005
    Date of Patent: April 20, 2010
    Assignee: Lexmark International, Inc.
    Inventors: Douglas Campbell Hamilton, Jerry Wayne Smith, Larry Earl Stahlman, Kiyoshi Mizushima, Hisakazu Hujimoto, Makoto Aoki
  • Large area alumina ceramic heater
    Publication number: 20060096084
    Abstract: A large area heater used, for example, in a laser printer belt fuser or as cooking surface, has an alumina substrate in which two bowed parts of alumina ceramic having opposed concave regions are formed together as a laminate. Electrical resistors are deposited on the laminate. The alumina laminate provides excellent resistance to uneven heating or other thermal stress. Alumina ceramic is readily shaped during manufacture and manufacturing costs and yield are good. A wide variety of large area heaters can usefully employ the laminate.
    Type: Application
    Filed: October 14, 2005
    Publication date: May 11, 2006
    Inventors: Douglas Hamilton, Jerry Smith, Larry Stahlman, Kiyoshi Mizushima, Hisakazu Hujimoto, Makoto Aoki
  • Large area alumina ceramic heater
    Patent number: 7005611
    Abstract: A large area heater used, for example, in a laser printer belt fuser or as cooking surface, has an alumina substrate in which two bowed parts of alumina ceramic having opposed concave regions are formed together as a laminate. Electrical resistors are deposited on the laminate. The alumina laminate provides excellent resistance to uneven heating or other thermal stress. Alumina ceramic is readily shaped during manufacture and manufacturing costs and yield are good. A wide variety of large area heaters can usefully employ the laminate.
    Type: Grant
    Filed: December 8, 2004
    Date of Patent: February 28, 2006
    Assignee: Lexmark International, Inc.
    Inventors: Douglas Campbell Hamilton, Jerry Wayne Smith, Larry Earl Stahlman, Kiyoshi Mizushima, Hisakazu Hujimoto, Makoto Aoki
  • Large area alumina ceramic heater
    Patent number: 6960741
    Abstract: A large area heater used, for example, in a laser printer belt fuser or as cooking surface, has an alumina substrate in which two bowed parts of alumina ceramic having opposed concave regions are formed together as a laminate. Electrical resistors are deposited on the laminate. The alumina laminate provides excellent resistance to uneven heating or other thermal stress. Alumina ceramic is readily shaped during manufacture and manufacturing costs and yield are good. A wide variety of large area heaters can usefully employ the laminate.
    Type: Grant
    Filed: August 26, 2002
    Date of Patent: November 1, 2005
    Assignee: Lexmark International, Inc.
    Inventors: Douglas Campbell Hamilton, Jerry Wayne Smith, Larry Earl Stahlman, Kiyoshi Mizushima, Hisakazu Hujimoto, Makoto Aoki
  • Large area alumina ceramic heater
    Publication number: 20050118404
    Abstract: A large area heater used, for example, in a laser printer belt fuser or as cooking surface, has an alumina substrate in which two bowed parts of alumina ceramic having opposed concave regions are formed together as a laminate. Electrical resistors are deposited on the laminate. The alumina laminate provides excellent resistance to uneven heating or other thermal stress. Alumina ceramic is readily shaped during manufacture and manufacturing costs and yield are good. A wide variety of large area heaters can usefully employ the laminate.
    Type: Application
    Filed: December 8, 2004
    Publication date: June 2, 2005
    Inventors: Douglas Hamilton, Jerry Smith, Larry Stahlman, Kiyoshi Mizushima, Hisakazu Hujimoto, Makoto Aoki
  • Large area alumina ceramic heater
    Publication number: 20040035843
    Abstract: A large area heater used, for example, in a laser printer belt fuser or as cooking surface, has an alumina substrate in which two bowed parts of alumina ceramic having opposed concave regions are formed together as a laminate. Electrical resistors are deposited on the laminate. The alumina laminate provides excellent resistance to uneven heating or other thermal stress. Alumina ceramic is readily shaped during manufacture and manufacturing costs and yield are good. A wide variety of large area heaters can usefully employ the laminate.
    Type: Application
    Filed: August 26, 2002
    Publication date: February 26, 2004
    Inventors: Douglas Campbell Hamilton, Jerry Wayne Smith, Larry Earl Stahlman, Kiyoshi Mizushima, Hisakazu Hujimoto, Makoto Aoki