Patents by Inventor Ernst Bergner

Ernst Bergner 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).

  • Apparatus for separating and conveying the uppermost sheet of a stack of sheets or sheet-like articles
    Patent number: 4759537
    Abstract: In order to be able in a simple manner to supply one or more suction pick devices periodically moved relative to the surface of a stack with driving energy, the suction pick-up device is connected to an air volume or source having substantially constant negative pressure over overpressure, and a valve assembly that periodically connects the suction pick-up device to the outside air. The valve assembly is incorporated in the connecting line between the suction pick-up device and the air volume. The valve assembly may be embodied with a control piston that is subject to the action of a restoring force, by a pneumatic multi-way valve having a regulattable frequency, or by a magnetic valve connected to a regulattable frequency generator.
    Type: Grant
    Filed: March 12, 1986
    Date of Patent: July 26, 1988
    Assignee: Fraumhofer-Gesellschaft zur Forderung der angewandten Forschung e.V.
    Inventors: Egon Illig, Ernst Bergner