Patents by Inventor Rudolf Kuehne

Rudolf Kuehne 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: 4670080
    Abstract: A metal-laminated base material for printed circuit boards is produced in a double-belt press. Sheets of laminated material impregnated with an accelerated resin system and prehardened are preheated in a preheating zone, before running into a pressure-effective zone of the double-belt press, and are supplied together with the metal foils to the heating region of the pressure-effective zone. Here, the individual layers are pressed to form the base material. The base material is preferably cooled under pressure in a cooling region of the pressure-effective zone, if appropriate heat-treated, trimmed at the edges and cut to length. The process provides uniform base-material boards of perfect quality.
    Type: Grant
    Filed: April 2, 1985
    Date of Patent: June 2, 1987
    Assignee: President Engineering Corp.
    Inventors: Lothar Schwarz, Friedel Ueberberg, Rudolf Kuehne, Dieter Fischer