Patents by Inventor Heinz J. Ulm

Heinz J. Ulm 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).

  • Apparatus for fixing sheets on a base
    Patent number: 4268000
    Abstract: The specification describes a method and an arrangement for attaching flexible sheets on a base by means of holding means at the corners. One corner of the sheet is held stationarily, a second corner of the sheet is guided in one direction and in this direction it is tautened in an outward direction while a third and a fourth corner of the sheet are urged outwards without guidance by forces, which are set substantially in a direction at 45.degree. to the edge of the sheet.
    Type: Grant
    Filed: January 19, 1978
    Date of Patent: May 19, 1981
    Inventor: Heinz J. Ulm