Patents by Inventor Per Knaul

Per Knaul 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 cleaning of an endless conveyor belt
    Patent number: 4860883
    Abstract: An endless conveyor belt is washed by a cleaning roller engaging the bottom run of the empty belt. The cleaning roller is sprayed by nozzles set counter to the direction of rotation of the cleaning roller. The surface of the cleaning roller is preferably covered with a felt-like material. Excess cleaning fluid is squeezed out by a pressure roller. A scraper, downstream of the cleaning roller, carries residual dirt or cleaning fluid remaining on the conveyor belt into the housing of the washing apparatus.
    Type: Grant
    Filed: November 2, 1987
    Date of Patent: August 29, 1989
    Assignee: B.A.T. Cigarettenfabriken GmbH
    Inventors: Per Knaul, Fritz Schelhorn, Roland Witte