Patents by Inventor Hisashi Yasumatsu

Hisashi Yasumatsu 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).

  • Drawing method and drawing die assembly
    Patent number: 7322224
    Abstract: A drawing method for forming a reflective curved surface by pressing a metal plate fitted in a fixed die with a movable die. The fixed die is composed of a lower die and a core, and the movable die is composed of an upper die and a presser. During the drawing, the metal plate is pressed to have a compressed border portion between a non-pressed portion and a curved surface pressed portion. It is the most desirable to compress the border portion to have a thickness which is 70% of the thickness of the metal plate before drawing.
    Type: Grant
    Filed: January 27, 2004
    Date of Patent: January 29, 2008
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Koji Ohashi, Takayoshi Mori, Michio Yamada, Koji Ooi, Hisashi Yasumatsu, Toshio Naiki, Hiromu Nakamura
  • Drawing method and drawing die assembly
    Publication number: 20050056073
    Abstract: A drawing method for forming a reflective curved surface by pressing a metal plate fitted in a fixed die with a movable die. The fixed die is composed of a lower die and a core, and the movable die is composed of an upper die and a presser. During the drawing, the metal plate is pressed to have a compressed border portion between a non-pressed portion and a curved surface pressed portion. It is the most desirable to compress the border portion to have a thickness which is 70% of the thickness of the metal plate before drawing.
    Type: Application
    Filed: January 27, 2004
    Publication date: March 17, 2005
    Applicant: Konica Minolta Business Technologies, Inc.
    Inventors: Koji Ohashi, Takayoshi Mori, Michio Yamada, Koji Ooi, Hisashi Yasumatsu, Toshio Naiki, Hiromu Nakamura