Patents by Inventor Ituo Ogiuchi

Ituo Ogiuchi 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).

  • Process for producing thermoplastic resin film of markedly reduced thickness unevenness
    Patent number: 4294791
    Abstract: A process for producing a film of a thermoplastic resin, characterized in that the rotation of a cooling drum for cooling a molten film-like extrudate is controlled such that the variation rate (%) of instantaneous rotation under no load (as defined in the specification) is less than about 1%, and that the cooled film-like extrudate is withdrawn from the cooling drum so that substantially no tension in the subsequent stretching step is exerted on the film-like extrudate on the cooling drum. The process is preferably applicable to a film-forming apparatus which operates at high speeds. A film having markedly reduced thickness unevenness is produced.
    Type: Grant
    Filed: December 26, 1979
    Date of Patent: October 13, 1981
    Assignee: Teijin Limited
    Inventors: Hiroshi Nouda, Yoshiaki Tanihara, Takashi Ikeda, Ituo Ogiuchi