Patents Assigned to Yugen-Kaisha Idea Research
  • Method for producing plastic compound and an apparatus therefor
    Patent number: 4022440
    Abstract: A method for producing plastic compound comprises pressure-feeding a resin and an additive therefor into a barrel, and applying compressive force and shearing force on the resin and the additive in the barrel at a predetermined temperature in such a manner that the position of the minimum clearance defined between a bore of the barrel and the maximally diametered portion of a rotor continuously changes with respect to the whole circumferences of the barrel and the rotor, whereby the resin and the additive are uniformly kneaded.
    Type: Grant
    Filed: February 19, 1975
    Date of Patent: May 10, 1977
    Assignees: Ikegai Iron Works, Ltd., Yugen-Kaisha Idea Research
    Inventors: Yuzo Kawamura, Mamoru Takiura, Yoshihiro Hayashizaki