Patents by Inventor Willi Kerth

Willi Kerth 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).

  • Patent number: 4238248
    Abstract: The present invention teaches a multi-stepped process for preparing high strength, improved formability, low earing strip stock which is especially suitable for the manufacture of deep drawn and ironed hollow bodies such as cans or the like. The process of the present invention is carried out in two distinct operations. The first operation comprises continuously casting an aluminum melt into strip form on a strip casting machine so as to produce a desired dendritic arm spacing, hot rolling the continuously cast strip at casting speed in a temperature range between 300.degree. C. and the non-equilibrium solidus temperature of the alloy with the total reduction in excess of 70% and finally coiling the hot strip and allowing it to cool in air to room temperature so as to produce a metal strip having properties favorable for subsequent cold rolling operations. The second operation comprises an improved cold rolling operation in which a brief heat treatment at 350.degree. C. to 500.degree. C.
    Type: Grant
    Filed: August 4, 1978
    Date of Patent: December 9, 1980
    Assignee: Swiss Aluminium Ltd.
    Inventors: Ivan Gyongyos, Kurt Buxmann, Martin Bolliger, Willi Kerth, Kurt Neufeld