Patents by Inventor Hans-Friedrich Marten

Hans-Friedrich Marten 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).

  • Rolling mill
    Patent number: 4299103
    Abstract: A method of and apparatus for rolling metal strips in a rolling mill having a 4-high roll stand and a tension roll stand comprising a plurality of pairs of combined rollers. The method comprises advancing the metal strips through the 4-high roll stand and tension roll stand, so that the strip extends between the roller of each pair of combined rollers and is partially wrapped around each of the rollers. The rollers of each pair are rotated in opposite directions at a pre-determined circumferential differential speed ratio.
    Type: Grant
    Filed: February 28, 1979
    Date of Patent: November 10, 1981
    Assignee: Schloemann-Siemag Akt.
    Inventor: Hans-Friedrich Marten