Patents by Inventor Ralf Polzin

Ralf Polzin 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 and device for joining flat products to be connected such that they overlap
    Patent number: 6288361
    Abstract: The invention relates to the joining of flat products of metallic materials to be interconnected overlapping. The joining takes place in a roll nip into which the flat products to be interconnected are introduced at an acute angle. Before they are pressed on one another in the roll nip, they are heated on their facing surfaces by radiation energy, but not melted. By a suitable profiling of at least one roller generated surface or one flat product the surface pressing is limited to the zone of the overlap joint and any flow of material transversely of the direction of the overlap joint is prevented.
    Type: Grant
    Filed: February 2, 1999
    Date of Patent: September 11, 2001
    Assignee: Thyssen Stahl Aktiengesellschaft
    Inventors: Hans Pircher, Rudolf Kawalla, Gerd Sussek, Thomas Stegemann-Auhage, Ralf Polzin