Patents by Inventor Naoyoshi Kimura

Naoyoshi Kimura 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).

  • Mold device for injection molding of synthetic resin
    Patent number: 6752612
    Abstract: In a mold device for injection molding of synthetic resin having a cavity surface alternately heated and cooled and a bottoming structure for producing a product having a bored portion like a window, a bottoming portion for the production of a product having a bored portion is provided on a parting surface of the mold and a vacant space is provided in the bottoming portion. Thus, the contact area of the bottoming portion is reduced and a contact pressure of the bottoming portion and thermal strain due to a temperature difference between the cavity side mold and core side mold are reduced, so that it is possible to prevent occurrence of crack in a portion located immediately outside the window of the product.
    Type: Grant
    Filed: December 28, 2001
    Date of Patent: June 22, 2004
    Assignee: Ono Sangyo Co., Ltd.
    Inventors: Naoyoshi Kimura, Fumio Takahashi, Masahiko Yamaki, Akihiko Imagawa, Mitsuharu Mikawa
  • Mold device for injection molding of synthetic resin
    Publication number: 20020094354
    Abstract: In a mold device for injection molding of synthetic resin having a cavity surface alternately heated and cooled and a bottoming structure for producing a product having a bored portion like a window, a bottoming portion for the production of a product having a bored portion is provided on a parting surface of the mold and a vacant space is provided in the bottoming portion. Thus, the contact area of the bottoming portion is reduced and a contact pressure of the bottoming portion and thermal strain due to a temperature difference between the cavity side mold and core side mold are reduced, so that it is possible to prevent occurrence of crack in a portion located immediately outside the window of the product.
    Type: Application
    Filed: December 28, 2001
    Publication date: July 18, 2002
    Inventors: Naoyoshi Kimura, Fumio Takahashi, Masahiko Yamaki, Akihiko Imagawa, Mitsuharu Mikawa