Patents by Inventor Hiroharu Nikkuni

Hiroharu Nikkuni 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).

  • Cap means for preventing resin from remaining in a mold of a runnerless injection molding apparatus
    Patent number: 4501550
    Abstract: This invention relates to cap means for preventing resin from remaining in a mold of a runnerless injection molding apparatus. The cap means is of a frusto-conical profile and incorporated in a space formed adjacent to a front end of a heating cylinder. Further, the cap means is provided with an opening from which a pointed tip member of the heating cylinder can project. The invention aims at removing resin scorching, its thermal decomposition, inconveniences of color or material exchange or the like.
    Type: Grant
    Filed: November 30, 1982
    Date of Patent: February 26, 1985
    Assignee: Shigeru Tsutsumi
    Inventor: Hiroharu Nikkuni