Patents by Inventor Helmut Lieberg

Helmut Lieberg 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 locating the edges of moving webs
    Patent number: 5328072
    Abstract: A device for continuously determining the position of the edge of a moving web uses a light signal from a light relay emitted in the direction of the edge of a web. The light signal is received and converted by the light relay into an input/output signal which is used as an indicator and as a control value for the position of the edge of the web. The signal outlet is moved together with the signal input preferably along a circular path which intersects the edge of the web twice so that the position of the edge of the web can be determined from the corresponding input/output signals obtained during each revolution.
    Type: Grant
    Filed: June 16, 1989
    Date of Patent: July 12, 1994
    Assignee: J.M. Voith GmbH
    Inventors: Gerd Ruessmann, Helmut Lieberg