Patents by Inventor Kazunori Naitou

Kazunori Naitou 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).

  • Sheet blow molding and molding method
    Patent number: 5789057
    Abstract: A method for molding a sheet blow molding, wherein a board member as a core of the sheet blow molding is placed between a pair of thermoplastic sheets facing each other and separated by a predetermined distance. Opposite ends of the sheets are clamped by dampers so as to form clamped sheets with a closed space between the clamped sheets. The clamped sheets are heated by a heater and air is supplied to the closed space. The clamped sheets are pressed between molds so as to cover all outer surfaces of the board member and to be thermally bonded to the board member.
    Type: Grant
    Filed: May 30, 1996
    Date of Patent: August 4, 1998
    Assignee: Tsutsunaka Plastic Industry Co., Ltd.
    Inventors: Kazunori Naitou, Yuuki Seki