Patents by Inventor Hatsuo Nagamatsu

Hatsuo Nagamatsu 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).

  • Three-layered container, a method and apparatus thereof
    Patent number: 5106284
    Abstract: A method for manufacturing a three-layered container by injection molding, the method consecutively including steps of:(a) preparing an injection molding apparatus having:an inner injector element having a tubular inner body and a flow path communicating with the inner inlet nozzle and an inner injecting nozzle formed both ends of the body, respectively; andan outer injector element having a tubular outer body including an outer injection nozzle and an outer inlet nozzle, the outer injector element disposed to hold the inner injector element so that a tubular space is formed between the inner and the outer bodies, the inlet nozzle of the outer body communicating with a curved groove formed in the outer surface of the inner injector body; andthe inner surface of the outer body and the outer surface of the inner body are in a form so that the thickness of the tubular space therebetween is smaller at a portion compared to other portions;(b) injecting a first resin from the outer injection nozzle;(c) injecting a
    Type: Grant
    Filed: May 15, 1991
    Date of Patent: April 21, 1992
    Assignee: Kamaya Kagaku Kogyo Co., Ltd.
    Inventors: Hidenori Kobayashi, Moriaki Suwabe, Nobuhiro Inakazu, Hatsuo Nagamatsu
  • Method of injection molding a three-layered container
    Patent number: 4957682
    Abstract: A method for manufacturing a three-layered container by injection molding, the method consecutively including steps of: (a) preparing an injection molding apparatus having: an inner injector element having a tubular inner body and a flow path communicating with the inner inlet nozzle and an inner injection nozzle formed both ends of the body, respectively; and an outer injector element having a tubular outer body including an outer injection nozzle and an outer inlet nozzle, the outer injector element disposed to hold the inner injector element so that a tubular space is formed between the inner and the outer bodies, the inlet nozzle of the outer body communicating with a curved groove formed in the outer surface of the inner injector body; and the inner surface of the outer body and the outer surface of the inner body are in a form so that the thickness of the tubular space therebetween is smaller at a portion compared to other portions; (b) injecting a first resin from the outer injection nozzle; (c) inject
    Type: Grant
    Filed: January 17, 1989
    Date of Patent: September 18, 1990
    Assignee: Kamaya Kagaku Kogyo Co., Ltd.
    Inventors: Hidenori Kobayashi, Moriaki Suwabe, Nobuhiro Inakazu, Hatsuo Nagamatsu