Patents by Inventor Max Schwab

Max Schwab 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).

  • Process for the production of drawing die bores
    Patent number: 4321843
    Abstract: A process for the production of drawing die bores, especially in hard metal or carbide wire drawing dies, wherein each bore has an inlet cone portion on the feed side of the die and a cylindrical calibrating portion along a common axis, the process being a two-step grinding and finishing procedure with a cross-grinding of the inlet cone in a first step and a calibrating grinding and finishing of the cylindrical portion in a second step. Especially preferred apparatus is described for each of these steps, with devices to operate in an automatic or semi-automatic manner to manufacture the finished drawing dies.
    Type: Grant
    Filed: May 8, 1979
    Date of Patent: March 30, 1982
    Assignee: Akzo, N.V.
    Inventors: Max Schwab, Peter Heinen, Willi Diederichs, Peter Gossens, Fritz-Gunter Ohloff, Hubert Minkenberg