Patents by Inventor Joerg Demmel

Joerg Demmel 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 folding a web of material
    Patent number: 6290635
    Abstract: An apparatus and method for producing a zig-zag folded filter element from a web of material (18), which is supplied through a feeding device to a stamping unit (10). To define the folding line, the stamping unit is fitted with an anvil roll (21) and a stamping die (24), the stamping unit being ultrasound activated and thereby improving the stamping operation.
    Type: Grant
    Filed: June 18, 1999
    Date of Patent: September 18, 2001
    Assignees: Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung E.V., Filterwerk Mann & Hummel GmbH
    Inventors: Joerg Demmel, Andreas Levermann, Siegfried Rapp