Patents by Inventor Josef Hefter

Josef Hefter 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).

  • Patent number: 4381219
    Abstract: A headbox arrangement for a papermaking machine contains a plurality of headboxes forming a group, these headboxes being arranged either essentially in parallelism with regard to one another or in fan-like or spread apart configuration. Between each two neighboring headboxes there is located a flexible divider, particularly in the form of a foil member, which extends past the outlet gap or slice of the headboxes.
    Type: Grant
    Filed: April 16, 1682
    Date of Patent: April 26, 1983
    Assignee: Escher Wyss GmbH
    Inventors: Alfred Bubik, Werner Seider, Josef Hefter
  • Patent number: 4357743
    Abstract: A controlled deflection roll possesses a roll shell which is radially movable in at least one plane in relation to a roll support. Position feelers or sensors are arranged at the ends of the roll shell. These position feelers control regulators operatively associated with pressure or support elements located between the roll support and the roll shell, as a function of deviations from a predetermined reference or set position, in a manner such that the roll shell is maintained in the reference or set position. It is possible to influence the pressure or support elements by the position feelers either equally or unequally, and specifically, with decreasing intensity in the presence of increasing distance from the related position feeler.
    Type: Grant
    Filed: January 8, 1981
    Date of Patent: November 9, 1982
    Assignee: Escher Wyss Limited
    Inventors: Josef Hefter, Peter Heitmann, Christoph Link, Hans-Joachim Schultz, Wolf-Gunter Stotz, Karl Volz