Patents by Inventor Walter Ruwe

Walter Ruwe 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 monitoring sheet movement near the lay marks of sheet-fed offset printing presses
    Patent number: 5186105
    Abstract: A device for monitoring sheet movement near the lay marks of sheet-fed offset printing presses. To ensure that a sheet has sufficient time to settle on the lay marks, the invention automatically selects between two instants at which sheet position is detected based on the state of the press (printing on or printing off). Since, depending on the state of the press, different procedures are performed before printing, selection of different instants of sensing provide a sheet the maximum amount of time possible for settling before detection.
    Type: Grant
    Filed: April 15, 1992
    Date of Patent: February 16, 1993
    Assignee: Man Roland Druckmaschinen AG
    Inventors: Helmut Emrich, Horst Muller, Walter Ruwe, Erich Wegel