Patents by Inventor Tsutomu Koyama

Tsutomu Koyama 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).

  • Process for forming a glass sheet
    Patent number: 6311523
    Abstract: A process for forming a glass sheet, which is a process for continuously forming a glass sheet, and which comprises a step of introducing a vapor film-forming agent, which is not vapor at least around room temperature and which is vapor at a temperature above the glass transition point of the glass, into a support composed of a structure or a material capable of internally containing liquid, and a step of sliding the support and the glass of which temperature is above the glass transition point against each other via a thin layer of a vaporized vapor film-forming agent.
    Type: Grant
    Filed: January 10, 2000
    Date of Patent: November 6, 2001
    Assignee: Asahi Glass Company Ltd.
    Inventors: Gen Kojima, Tsutomu Koyama, Akira Takada, Masao Unoki, Kiyoshi Matsumoto
  • Process for forming a glass sheet
    Patent number: 6101845
    Abstract: A process for forming a glass sheet, which is a process for continuously forming a glass sheet, and which comprises a step of introducing a vapor film-forming agent, which is not vapor at least around room temperature and which is vapor at a temperature above the glass transition point of the glass, into a support composed of a structure or a material capable of internally containing liquid, and a step of sliding the support and the glass of which temperature is above the glass transition point against each other via a thin layer of a vaporized vapor film-forming agent.
    Type: Grant
    Filed: August 31, 1998
    Date of Patent: August 15, 2000
    Assignee: Asahi Glass Company Ltd.
    Inventors: Gen Kojima, Tsutomu Koyama, Akira Takada, Masao Unoki, Kiyoshi Matsumoto
  • Method of laminating plastic film and shaped metal substrates
    Patent number: 4225379
    Abstract: Lamination of plastic film and shaped metal substrates is carried out by a pair of rolls which comprises one heat-resistant roll having a hollow for receiving at least a forward edge of the shaped metal substrate, on at least one of the surfaces of the roll. A laminated product having no defect or crease of the plastic film can be obtained.
    Type: Grant
    Filed: November 30, 1977
    Date of Patent: September 30, 1980
    Assignee: Asahi Glass Company, Limited
    Inventors: Tsuneji Ishii, Tetsuro Tsukada, Takeshi Abe, Tsutomu Koyama