Patents by Inventor Toshiba Machine Co. Limited

Toshiba Machine Co. Limited 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 producing foamed thermoplastic resin articles having smooth and glossy surfaces free from swirl marks and hair cracks
    Patent number: 4096218
    Abstract: A method of producing foamed thermoplastic resin articles having smooth and glossy surfaces free from swirl marks and hair cracks, which comprises melting a thermoplastic resin containing a condensable blowing agent and an organic chemical blowing agent, injecting, in full shot, the molten resin into a mold cavity to which a pressurized gas is being applied during said injection, terminating the application of the pressurized gas to the mold cavity, enlarging the volume in said molded cavity by movement of a mold wall, and thereafter cooling and solidifying the resin to form the foamed articles.
    Type: Grant
    Filed: July 27, 1976
    Date of Patent: June 20, 1978
    Assignee: Asahi-Dow Limited
    Inventors: Akio Yasuike, Tsutomu Odagiri, Toshiba Machine Co. Limited