Patents by Inventor Siegfried Chszaniecke

Siegfried Chszaniecke 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).

  • Twin-screw extrusion device
    Patent number: 4643661
    Abstract: An extrusion device comprises feed means and extrusion means. The feed means comprises a feed hopper having a feed aperture formed therein, said feed aperture feeding material into a hollow barrel in which a single screw rotates. The single screw conveys the material to the extrusion device. The extrusion device comprises twin screws rotating in a further barrel. The two barrels are co-axial with one another and are in series with one another. The diameter of the single screw is at least twice the diameter of each of the twin screws.
    Type: Grant
    Filed: November 7, 1984
    Date of Patent: February 17, 1987
    Assignee: Hermann Berstorff Maschinenbau GmbH
    Inventor: Siegfried Chszaniecke