Patents by Inventor Ludwig Weckop

Ludwig Weckop 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).

  • Interfolder device with dynamic pressure section connected at the outlet side of the folding rollers
    Patent number: 5005816
    Abstract: An interfolder device for folding sheet material in a zig-zag manner which uses a pair of counter rotating rollers for receiving the sheet material and an elongated guide track disposed below the counter rotating rollers for receiving, supporting and conveying the sheet material as it is folded on the guide track. There is also provided a dynamic pressure means consisting of a vacuum that is coupled to the guide track by means of perforations formed in the guide track in order to apply a brake to the sheet material as it is supported and conveyed along the track during its folding process.
    Type: Grant
    Filed: May 16, 1989
    Date of Patent: April 9, 1991
    Assignee: Winkler & Dunnebier Maschinenfabrik und Eisengiesserei KG
    Inventors: Kurt Stemmler, Ludwig Weckop, Egon Marth