Patents by Inventor Shoichi Yazawa

Shoichi Yazawa 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).

  • Apparatus and method for fabricating a perforated web by light
    Patent number: 5382773
    Abstract: An apparatus for fabricating a perforated web comprising an endless masking plate arranged above a continuously conveyed web. The masking plate has a plurality of apertures arranged in a predetermined pattern, the masking plate being adapted so as to be continuously circulated. The light is irradiated to the web via the masking plate so that apertures or slits are formed in the web corresponding to the apertures of the masking plate. The light may be a laser, an infrared light, or an ultraviolet light, and the light from the source is diverged transversely about the web and converged longitudinally about the web.
    Type: Grant
    Filed: December 24, 1992
    Date of Patent: January 17, 1995
    Assignees: Nippon Petrochemicals Company, Limited, Polymer Processing Research Institute, Ltd.
    Inventors: Kazuhiko Kurihara, Hiroshi Yazawa, Shoichi Yazawa, Yuki Kuroiwa, Shuichi Murakami