Patents by Inventor Helmut Frey

Helmut Frey 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).

  • Device for separating cylindrical screen stencil from an ink tube and washing the stencil
    Patent number: 3987511
    Abstract: A frame has an inclined surface over which slides a carriage having a pair of screen mounting elements for supporting opposite screen ends of a stencil. A washing tube having spray nozzles and a brush is fixedly positioned such that movement of the carriage brings a stencil carried thereby to a position over the washing tube. An ink tube has one end supported by the washing tube and another end supported by the frame, such that movement of the carriage separates the stencil from the ink tube.
    Type: Grant
    Filed: November 19, 1975
    Date of Patent: October 26, 1976
    Inventors: Karl Mayer, Friedrich Kampitsch, Helmut Frey, Friedrich Letschnig
  • Thermoplastic composition comprising PVC and chlorinated polyethylene
    Patent number: 3940456
    Abstract: Blends of vinyl chloride polymers and chlorination products of polyolefins well suitable for dry blend technique are obtained by using a chlorinated low pressure polyethylene prepared by chlorinating in water in the presence of silicic acid and a siloxane oil.
    Type: Grant
    Filed: January 10, 1975
    Date of Patent: February 24, 1976
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Hans-Helmut Frey, Helmut Klug