Patents by Inventor Erich Tragner

Erich Tragner 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: 4610070
    Abstract: A process for manufacturing clad strip is such that a core strip, in particular a metal core strip, is fed to a roll gap formed by at least two rolls and is clad at least on one side by a cladding strip. In the course of the said process the cladding strip is attached to the core strip by mechanical deformation before reaching the roll gap. This takes place most usefully when a hot core strip (e.g. aluminum strip at 400.degree.-600.degree. C.) is to be clad with a cold cladding strip (e.g. aluminum strip at 20.degree.-70.degree. C.). A corresponding device for manufacturing clad strip is such that the core strip, before it enters the roll gap, is engaged above and/or below by an attachment roll, and the cladding strip is introduced between the core strip and the attachment roll.
    Type: Grant
    Filed: September 13, 1984
    Date of Patent: September 9, 1986
    Assignee: Swiss Aluminium Ltd.
    Inventors: Ernst Gold, Erich Tragner, Dieter Lenz
  • Patent number: 4174232
    Abstract: A method of manufacture of sheets, strips and foils with high mechanical strength, good deformability, and very little formation of ears, from age hardenable aluminum alloys of the Al-Si-Mg type by continuous casting or strip casting and hot and cold rolling, characterized in that an Al-Mg-Si-alloy is employed, which contains an insoluble excess of silicon at a temperature of 450.degree. to 550.degree. C. usual for homogenization annealing for this type of alloy, this excess remaining in defined finely dispersed form in the matrix, when the alloy is subjected to such a heat treatment; the alloy having preferably a composition corresponding to the area A-B-C-D-A of FIG. 1 of the accompanying drawings, where A=1% Si/0.6% Mg (weight percent), B=1.8% Si/0.6% Mg, C=1.8% Si/0.2% Mg and D=1.2% Si/0.2% Mg, with facultatively additions of a maximum of 0.3% each of chromium, manganese, zirconium and/or titanium.
    Type: Grant
    Filed: December 22, 1977
    Date of Patent: November 13, 1979
    Assignee: Swiss Aluminium Ltd.
    Inventors: Dieter Lenz, Erich Tragner