Patents by Inventor Hans-Georg Friedrich

Hans-Georg Friedrich 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: 5571461
    Abstract: An extrusion die (1) with a calibrated exit orifice (6) for extruding extruded sections (3, 3', 3") of different profile cross-sections onto a glazing or glass plate (2) is provided with an obturating slide (22) movably positioned in front of the calibrate exit orifice (6) through which the die cross-section can be adjusted. The slide (22) is operated by a pneumatic jack (16).
    Type: Grant
    Filed: June 29, 1993
    Date of Patent: November 5, 1996
    Assignee: Saint-Gobain Vitrage International
    Inventors: Heinz Scholl, Hans-Georg Friedrich, Friedhelm Hammes
  • Patent number: 5273704
    Abstract: A method of shaping an extruded section of polymer directly onto the surface edges of a glazing or glass plate. In one embodiment, a rotatable plate member having a plurality of calibrated die cross sections is placed in front of the exit orifice of an extrusion die. The plate member is rotated to obtain, an extruded section having different profile cross sections and the flow rate of the polymer through the die is controlled in response to the position of the plate member so that the amount of polymer being fed corresponds to the respective profile section being extruded. In another embodiment, an obturating slide member is placed in front of an extrusion die exit orifice sized to correspond to the largest desired profile cross section. To produce abrupt changes in profile cross section, the slide is moved quickly at predetermined locations along the path of the extrusion die. To produce a continuous transition between profile sections, the slide is moved slowly during extrusion.
    Type: Grant
    Filed: October 2, 1991
    Date of Patent: December 28, 1993
    Assignee: Saint-Gobain Vitrage International
    Inventors: Heinz Scholl, Hans-Georg Friedrich, Friedhelm Hammes
  • Patent number: 4247355
    Abstract: A plastic sheet is laminated to a glass sheet for the manufacture of laminated safety glass by means of an elastic membrane rigidly held at its periphery and subjected to increasing gas pressure, the membrane thereby pressing the plastic sheet against the glass sheet progressively from the center out toward the edges of the latter.
    Type: Grant
    Filed: August 4, 1978
    Date of Patent: January 27, 1981
    Assignee: Saint-Gobain Industries
    Inventors: Hans-Georg Friedrich, Friedrich Halberschmidt, Rudolf Pelzer
  • Patent number: 4152188
    Abstract: A plastic sheet is laminated to a glass sheet for the manufacture of laminated safety glass by means of an elastic membrane rigidly held at its periphery and subjected to increasing gas pressure, the membrane thereby pressing the plastic sheet against the glass sheet progressively from the center out toward the edges of the latter.
    Type: Grant
    Filed: February 9, 1977
    Date of Patent: May 1, 1979
    Assignee: Saint-Gobain Industries
    Inventors: Hans-Georg Friedrich, Friedrich Halberschmidt, Rudolf Pelzer