Patents by Inventor Seizo Takayama

Seizo Takayama 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).

  • Vent-type plastication molding machine
    Patent number: 4511319
    Abstract: A vent-type plastication molding machine has a material supply rate control system. The reciprocal sliding motion speed of the screw in an axial direction of the heating cylinder is detected by a detector comprising a rack fixed to the reciprocally sliding portion of the machine, a pinion engaging with said rack and rotatably mounted on the stationary portion of the machine, and an electric generator connected with said pinion.
    Type: Grant
    Filed: August 20, 1982
    Date of Patent: April 16, 1985
    Assignee: UBE Industries, Inc.
    Inventor: Seizo Takayama
  • Resin moulding screws
    Patent number: 4215978
    Abstract: In a resin moulding screw provided with helical flight and valley, the bottom surface of valley is divided into a plurality of portions along a dividing line, and the divided portions are alternately displaced in the radial direction to form wavy contours. Barriers are provided to cross the dividing line to form dams which prevent intercommunication of the valleys at the bottom of the screw groove to prevent decrease of the thrust pressure along the flight for efficiently blending and melting solid and molten resins.
    Type: Grant
    Filed: July 14, 1978
    Date of Patent: August 5, 1980
    Assignee: Ube Industries, Ltd.
    Inventors: Seizo Takayama, Kiyoshi Hashimoto