Patents by Inventor Gerhard Winkler

Gerhard Winkler 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 and apparatus for optimizing the output of a blown film extruder plant by means of a process computer
    Patent number: 4246212
    Abstract: In a film blowing plant comprising an extruder for the melt, a film blowhead, calibrating means for the blown tubular film, oscillatory take-off means for the film and a coiler for the flattened film, the output of the plant is set to an optimum figure by a process computer controlling the width and thickness of the film. The height of the line of solidification of the film above the blowhead is measured and, in response to a departure of this height from a given desired value, the output of the extruder is increased or reduced as the case may be.
    Type: Grant
    Filed: April 13, 1979
    Date of Patent: January 20, 1981
    Assignee: Windmoller & Holscher
    Inventors: Hartmut Upmeier, Helmut Helbig, Werner J. Zimmermann, Gerhard Winkler, Ferdinand Loning