Patents by Inventor Hans Ruff

Hans Ruff 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).

  • Roll for guiding web type material
    Patent number: 5114062
    Abstract: A roll for guidance of web type material, such as paper or cardboard, has a shell that features a multitude of bores. The roll is coordinated with a device for subjecting the roll interior to suction. To hold the web on the roll at standstill, part of these bores can be subjected to suction. In the operation of the roll, air trapped between the web and the roll shell can enter the roll also through the remaining bores and escape in the roll area that is not looped by the web.
    Type: Grant
    Filed: December 19, 1989
    Date of Patent: May 19, 1992
    Assignee: J.M. Voith GmbH
    Inventors: Friedrich Kuhn, Wolfgang Drefs, Hans Ruff, Siegbert Scheuter