Patents by Inventor Franz Arnhold

Franz Arnhold 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).

  • Bending matrix and liner
    Patent number: 4137746
    Abstract: A bending matrix, and in particular a folding matrix of a die bending tool. The inlet edges of the matrix opening are provided with a liner formed from an anti-friction material with a low coefficient of friction, and the base of the matrix opening is formed of a material capable of and intended to absorb the ram pressure.
    Type: Grant
    Filed: October 12, 1977
    Date of Patent: February 6, 1979
    Assignee: Ernst Schweizer AG, Metallbau Zurich
    Inventors: Franz Arnhold, Walter Husner