Patents by Inventor Takatoshi Imafuku

Takatoshi Imafuku 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).

  • Waterproof sheet fixing member and method of fixing the same
    Patent number: 6338232
    Abstract: A waterproof sheet fixing member for fixing a waterproof thermoplastic resin sheet on a structure to be waterproofed, includes a plate-like main member made of thermoplastic resin, and a conductive multi-aperture sheet having an upper surface and a lower surface. The conductive multi-aperture sheet has a plurality of joining apertures each communicating the upper surface with the lower surface, and is integrally provided in the main member. A method of fixing the waterproof thermoplastic resin sheet includes the steps of fixing the fixing member on a surface of the structure, spreading the waterproof thermoplastic resin sheet on the surface of the structure, and induction heating the conductive multi-aperture sheet via the waterproof thermoplastic resin sheet to melt a portion where the main member contacts the waterproof thermoplastic resin sheet. Thus, the main member is integrally welded to the waterproof thermoplastic resin sheet.
    Type: Grant
    Filed: December 6, 1999
    Date of Patent: January 15, 2002
    Assignee: Tsutsunaka Plastic Industry Co., Ltd.
    Inventors: Takashi Yamanaka, Masaya Sera, Yasuo Kumamoto, Takatoshi Imafuku