Patents by Inventor Tomokazu Ninomiya

Tomokazu Ninomiya 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).

  • Injection molding of ultra high molecular weight polyethylene
    Patent number: 4164531
    Abstract: Process for injection molding ultra high molecular weight polyethylene by injecting the ultra high molecular weight polyethylene into a cavity having a volume 1.5-3.0 times that of the injected polyethylene at a shear rate of at least 50,000 sec..sup.-1 measured at the gate of the injection nozzle and then compressing the cavity to a volume less than 1.5 times that of the injected polyethylene.
    Type: Grant
    Filed: December 8, 1977
    Date of Patent: August 14, 1979
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Takeshi Shiraki, Shozo Hieda, Tomokazu Ninomiya
  • Device for producing an obliquely oriented film of thermoplastic synthetic resin
    Patent number: 4009975
    Abstract: A device for producing an obliquely oriented film of thermoplastic synthetic resin comprising an extruder, an annular die for forming the resin extruded from the extruder, a first mandrel, a second mandrel, and drawing rolls for drawing the resinous film passed over the first mandrel and then second mandrel. Said first and second mandrels are rotated in the different directions from each other.
    Type: Grant
    Filed: January 2, 1976
    Date of Patent: March 1, 1977
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Tomokazu Ninomiya, Syuzo Sasagawa, Hideo Washio, Nobuhiro Hirata