Patents by Inventor Ulrich Proossler

Ulrich Proossler 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).

  • Melt-sealing device for extruders for the processing of thermoplastic polymers or rubber
    Patent number: 5490725
    Abstract: A melt-sealing device for extruders for thermoplastic polymers or rubber for sealing off the gear unit side against high-melt pressure, in which sealing is effected by the configuration of the extruder screw which includes an intake section, a compression section having a channel depth that decreases in the conveying direction, a metering section with a constant screw channel depth, a smooth annular melt channel section, and a blister element with an annular gap for the sealing melt.
    Type: Grant
    Filed: September 28, 1994
    Date of Patent: February 13, 1996
    Assignee: Hermann Berstorff Maschinenbau GmbH
    Inventors: Friedrich-Otto Behrens, Ulrich Proossler, Jurgen Voigt