Patents by Inventor Stefan Petersson

Stefan Petersson 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).

  • Continuous belt press with capacitative heating means
    Patent number: 4316709
    Abstract: A continuously operating heat-treatment press in which a continuously advanced layer (7) of material under pressure, for example including glue-coated wood chips, is heated dielectrically. The press is of the kind which comprises at least one endless, continuously running press chain (8), for maintaining a vertically acting press force on the layer (7) of material, said press chain (8) being formed of mutually linked support elements. The press surface of the support elements in the press chain (8) comprises mutually electrically insulated metal rods (23) extending in the transverse direction of the chain. At least one stationary electrode plate (28) connected to a high frequency generator is arranged adjacent said metal rods (23).
    Type: Grant
    Filed: November 21, 1980
    Date of Patent: February 23, 1982
    Assignee: Kockums Industri AB
    Inventors: Stefan Petersson, Sven O. Alstad