Patents by Inventor Junzo Sakai

Junzo Sakai 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).

  • Method of extruding and shaping thermoplastic material
    Patent number: 4478775
    Abstract: A method of extruding and shaping thermoplastic material in which a constant amount of thermoplastic material is continuously fed from a screw extruder to a die by means of a metering pump. The extruder is arranged to continuously receive a constant amount of the thermoplastic material. The metering pump is adjusted to the correct rotational frequency to maintain the pressure of the molten thermoplastic material between the extruder and the metering pump within a predetermined range.
    Type: Grant
    Filed: May 7, 1982
    Date of Patent: October 23, 1984
    Assignee: Sekisui Kagaku Kogyo Kabushiki Kaisha
    Inventors: Gen Endo, Hirokazu Hori, Yoshihiro Kawada, Junzo Sakai