Patents Assigned to Helmut Schmetzer
  • Patent number: 5177932
    Abstract: In order to connect at least two layers of paper or the like, the layers are cut into strips in the connection area and forced out of the plane of the layers alternately and in pairs. To this effect punching and pressing tools with punching teeth may be provided.
    Type: Grant
    Filed: August 23, 1991
    Date of Patent: January 12, 1993
    Assignees: Horst Schwede, Roland Schwede, Helmut Schmetzer
    Inventor: Helmut Schmetzer