Patents Represented by Attorney S. M. Teigland

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  • Method of improving the flatness of compression-rolled plastic film
    Patent number: 4310485
    Abstract: The flatness of compression-rolled plastic film is improved by passing the film under tension over heated rolls, stretching the heated film, setting the stretched film by passing it over a tempering roll, and then cooling the set film by passing it over a cooling roll.
    Type: Grant
    Filed: September 26, 1980
    Date of Patent: January 12, 1982
    Assignee: Crown Zellerbach Corporation
    Inventor: Rikhard C. Dauber