Patents by Inventor Alexander Wulfert

Alexander Wulfert 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).

  • Contact roll
    Patent number: 10301133
    Abstract: The invention describes contact rolls for pressing at least one web of material, preferably a web of plastic film, against at least one rotating winding device, the contact roll comprising a surface layer. At least two segments are provided which are spaced axially apart and which extend around, in which segments the quality of the surface layer differs from the quality of the other areas of the surface layer, at least some portions of said segments being in contact with the edges of the at least one web of material.
    Type: Grant
    Filed: November 16, 2015
    Date of Patent: May 28, 2019
    Assignee: Windmöller & Hölscher KG
    Inventors: David Finnemore, Alexander Wulfert, Frank Hoffmann
  • Contact Roll
    Publication number: 20170327334
    Abstract: The invention describes contact rolls for pressing at least one web of material, preferably a web of plastic film, against at least one rotating winding device, the contact roll comprising a surface layer. At least two segments are provided which are spaced axially apart and which extend around, in which segments the quality of the surface layer differs from the quality of the other areas of the surface layer, at least some portions of said segments being in contact with the edges of the at least one web of material.
    Type: Application
    Filed: November 16, 2015
    Publication date: November 16, 2017
    Inventors: David Finnemore, Alexander Wulfert, Frank Hoffmann