Patents by Inventor Rudiger Voll

Rudiger Voll 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).

  • Method for the manufacture of a relief-like profiled outer sole of a cross-linked ethylene-co-vinyl acetate (EVA) foamed with closed cells
    Patent number: 4396568
    Abstract: Method for the manufacture of a relief profiled outer sole of cross-linked EVA polymer foamed with closed cells is described in which the polymer used is formed into a cross-linked, expanded tempered blank, split by at least one cut into several subblanks, and whereupon the surface of a subblank is heated and pressed to form the relief profile. The temperature gradient of the blank while it is being pressed is important for precise formation of the relief profile.
    Type: Grant
    Filed: July 17, 1981
    Date of Patent: August 2, 1983
    Assignee: Firma Carl Freudenberg
    Inventors: Rudiger Voll, Walter Hoche, Gerhard Graab