Patents by Inventor Makoto Sunouchi

Makoto Sunouchi 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).

  • Method of manufacturing bottomed hollow cylinder using a press
    Patent number: 5924188
    Abstract: A manufacturing method is provided for forming a hollow cylinder with a bottom which may be employed in rotary head drums of magnetic recording and reproduction systems such as video tape recorders and digital audio tape recorders.The manufacturing method includes pressing a single circular plate to form the hollow cylinder, thrusting an end of a side wall of the hollow cylinder in a direction substantially parallel to the side wall in a press die so as to adjust the thickness of the side wall to be uniform, and machining an outer surface of the side wall of the hollow cylinder so as to have a given surface roughness and a given roundness.
    Type: Grant
    Filed: March 3, 1997
    Date of Patent: July 20, 1999
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yasunori Tokunou, Kouichi Inoue, Toshikazu Shogase, Makoto Sunouchi, Takeshi Yoshikawa