Patents by Inventor Peter Graczoll

Peter Graczoll 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).

  • Method of producing an injection moulding tool
    Patent number: 4801068
    Abstract: An injection moulding tool with optimum temperature distribution as the result of an improved tempering duct system is obtained if the tool inserts (10, 11) are each made up of two or more plates, tempering ducts (12, 12', 12") are worked in from the external faces (F1, F2, F3), on which the parts are subsequently joined by the diffusion welding method. An injection moulding tool for VHS reel hubs produced by this method produces moulds for injection moulding with substantially reduced wobble and a reduced cycle time.
    Type: Grant
    Filed: September 14, 1987
    Date of Patent: January 31, 1989
    Assignee: Agfa-Gevaert Aktiengesellschaft
    Inventors: Peter Graczoll, Franz Gumplinger, Helmut Peuke, Gerd Riedel