Patents by Inventor Masato Hirasaka

Masato Hirasaka 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).

  • Fiber reinforced plastic sheet and producing the same
    Patent number: 5194462
    Abstract: This invention relates to a fiber reinforced plastic sheet having a gradient layer structure wherein the number of reinforcing fibers continuously varies. The fiber reinforced plastic sheet of the invention is excellent in smooth appearance, fluidity during molding to an article, fiber filling ability into a complex form portion of an article and mechanical strength and can be produced inexpensively.
    Type: Grant
    Filed: January 17, 1992
    Date of Patent: March 16, 1993
    Assignee: Nkk Corporation
    Inventors: Masato Hirasaka, Yoshiaki Fujiwara
  • Process of making a fiber-reinforced plastic sheet having a gradient of fiber bundle size within the sheet
    Patent number: 5108678
    Abstract: This invention relates to a fiber reinforced plastic sheet having a gradient layer structure wherein the number of reinforcing fibers continuously varies and a process for producing the same by spreading a mixture of the fibers different in the number of filaments over the traveling zone of a conveyor and then pressing it while it contains a resin. The fiber reinforced plastic sheet of the invention is excellent in smooth appearance, fluidity during molding to an article, fiber filling ability into a complex form portion of an article and mechanical strength and can be produced inexpensively.
    Type: Grant
    Filed: April 27, 1990
    Date of Patent: April 28, 1992
    Assignee: NKK Corporation
    Inventors: Masato Hirasaka, Yoshiaki Fujiwara