Patents by Inventor Friedrich Bernd Bielfeldt

Friedrich Bernd Bielfeldt 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: 5659940
    Abstract: A method for converting a board manufacturing plant from a discontinuous method of operation to a continuous one. A pre-assembly and trial start-up of the to-be-installed continuous press is performed at a close-by location during operation of the to-be-replaced press. An appropriate set-up area of sufficient floor strength is established close to the production hall, and the continuous press is designed to have vertical mechanical junctions for the transport of individual modules. These modules, being provided with assembly bridges and lifting devices, are transportable as units resistant to flexure and torsion.
    Type: Grant
    Filed: April 26, 1994
    Date of Patent: August 26, 1997
    Assignee: Maschinenfabrik J. Dieffenbacher GmbH & Co.
    Inventor: Friedrich Bernd Bielfeldt
  • Patent number: 3981662
    Abstract: An injection-molding machine, especially for thermally crosslinkable and thermosetting materials, and a method of operating same, wherein a resin-distribution or manifold plate is provided along one of the mold halves and is clamped in place by the mold-closing and retaining means during injection, but the plate is withdrawn thereafter to prevent heating of the distribution channels and hardening or crosslinking of the resinous material therein.
    Type: Grant
    Filed: December 27, 1971
    Date of Patent: September 21, 1976
    Assignee: Krauss-Maffei Aktiengesellschaft
    Inventors: Friedrich Bernd Bielfeldt, Klaus Handler