Patents by Inventor Takao Kobari

Takao Kobari 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).

  • X-Y plotter for non-perforated paper
    Patent number: 4903045
    Abstract: An X-Y plotter is of the type which moves a non-perforated recording paper by drive rollers and pinch rollers. The outer surface of each of the drive rollers is formed with a cylindrical reference surface and with a plurality of minute projections of sharp quadrangular pyramidal shape distributed over the whole outer surface of the roller. These reference surface and minute projections are formed by machining in the entire circumferential or outer surface of the drive roller a plurality of trapezoidal grooves extending parallel and orthogonally to the axis of the drive roller.
    Type: Grant
    Filed: September 16, 1988
    Date of Patent: February 20, 1990
    Assignee: Hitachi, Ltd.
    Inventors: Masami Sakamoto, Ryoichi Magumo, Tamio Ishihara, Takao Kobari