Patents by Inventor Toshikazu Oishi

Toshikazu Oishi 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).

  • Process for producing filament and filament assembly composed of thermotropic liquid crystal polymer
    Patent number: 6207273
    Abstract: A process for producing a filament assembly composed of a thermotropic liquid crystal polymer, which comprises melt extruding a thermotropic liquid crystal polymer through an orifice nozzle into a high-speed fluid to thereby hold filaments spun right under the spinning nozzle at a high temperature, so that the filaments are taken up at a high draft ratio by the frictional force of the high-speed fluid.
    Type: Grant
    Filed: June 7, 1999
    Date of Patent: March 27, 2001
    Assignee: Polymer Processing Research Institute Limited
    Inventors: Kazuhiko Kurihara, Hiroshi Yazawa, Toshikazu Oishi, Yoichi Mazawa
  • Process for producing filament and filament assembly composed of thermotropic liquid crystal polymer
    Patent number: 6051175
    Abstract: A process for producing a filament assembly composed of a thermotropic liquid crystal polymer, includes the step of melt extruding a thermotropic liquid crystal polymer through an orifice nozzle into a high-speed fluid to thereby hold filaments spun right under the spinning nozzle at a high temperature, so that the filaments are taken up at a high draft ratio by the frictional force of the high-speed fluid.
    Type: Grant
    Filed: May 3, 1995
    Date of Patent: April 18, 2000
    Assignee: Polymer Processing Research Inst., Ltd.
    Inventors: Kazuhiko Kurihara, Hiroshi Yazawa, Toshikazu Oishi, Yoichi Mazawa
  • Non-woven fabric and method and apparatus for making the same
    Patent number: 5312500
    Abstract: A non-woven fabric is characterized by including a filament layer in which one or more continuous filaments composed of a polymeric material are spirally collected substantially along a shape obtained by offsetting an ellipse having an elongated major axis in a plane. This non-woven fabric can be obtained by spinning a filament composed of a polymeric material, vibrating the filament, amplifying vibration of the filament, and collecting the filament into an elliptic shape having an elongated major axis so that the filament is arranged in a direction of the major axis.
    Type: Grant
    Filed: December 4, 1990
    Date of Patent: May 17, 1994
    Assignees: Nippon Petrochemicals Co., Ltd., Polymer Processing Research Inst., Ltd.
    Inventors: Kazuhiko Kurihara, Shigezou Kojima, Hiroshi Yazawa, Toshikazu Oishi
  • Apparatus for wrapping and method therefor
    Patent number: 5307609
    Abstract: A wrapping apparatus which comprises:means for supplying a band-like member,means for stretching the band-like member in at least lateral direction thereof, the lateral stretch means comprising a unit for running the band-like member to spread out the member so that it forms a sector (an unfolded fan) and a unit for detachably gripping the regions (or margins) of the band-like member respectively near the opposite widthwise ends thereof so that they are detachable from the running unit, andmeans for winding the stretched band-like member around an article for the wrapping thereof.As one embodiment of the present invention, a method for wrapping an article with said wrapping apparatus is disclosed.
    Type: Grant
    Filed: January 21, 1992
    Date of Patent: May 3, 1994
    Assignees: Nippon Petrochemicals Co., Ltd., Polymer Processing Research Inst., Ltd.
    Inventors: Akihide Kurata, Katsuaki Wakahara, Kazuhiko Kurihara, Hiroshi Yazawa, Toshikazu Oishi, Shuichi Murakami, Yukio Matsumura, Yoichi Mazawa