Patents by Inventor Rolf Schellenberg

Rolf Schellenberg 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).

  • Process and apparatus for perforating, stamping or creasing of paper and cardboard in rotary printing presses
    Patent number: 4596546
    Abstract: In a rotary printing press with a blanket cylinder (2) and an impression cylinder (3), the blanket is removed and replaced by a base sheet (5). On this base sheet (5) are arranged strips (6). The arrangement of the strips (6) corresponds to the perforation, stamping or creasing to be produced in the paper or cardboard passing through the rotary printing press. On the impression cylinder (3) is arranged a smooth protective sheet (7). Both sheets (5) and (7) can be used several times and can be installed or removed rapidly by means present on the machine.
    Type: Grant
    Filed: January 6, 1984
    Date of Patent: June 24, 1986
    Inventor: Rolf Schellenberg