Patents by Inventor Donald Edward Boesch

Donald Edward Boesch 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).

  • Transfer molding thermosetting polymeric material
    Patent number: 3969461
    Abstract: In transfer molding thermosetting polymeric materials, a first preform of first thermosetting polymeric material having a volume substantially equal to the volume of the die cavities is placed in the transfer chamber adjacent the runners. A second preform of second thermosetting polymeric material cheaper than the first polymeric material is placed in the transfer chamber above the first preform. The transfer chamber is pressurized and the second preform is deformed and pressurizes and deforms the first preform and causes the first thermosetting polymeric material to flow through the runners into the die cavities. After curing, the molded articles consisting of first thermosetting polymeric material are removed from the die cavity, and scrap cull and runner consisting substantially of cheap second thermosetting polymeric material are removed from the mold runners and the bottom of the transfer chamber. Thus, considerable economies are effected.
    Type: Grant
    Filed: June 27, 1975
    Date of Patent: July 13, 1976
    Assignee: Western Electric Company, Inc.
    Inventors: Donald Edward Boesch, Yusuf Taher Koita
  • Transfer molding thermosetting polymeric material
    Patent number: 3954362
    Abstract: In transfer molding thermosetting polymeric materials, a first preform of first thermosetting polymeric material having a volume substantially equal to the volume of the die cavities is placed in the transfer chamber adjacent the runners. A second preform of second thermosetting polymeric material cheaper than the first polymeric material is placed in the transfer chamber above the first preform. The transfer chamber is pressurized and the second preform is deformed and pressurizes and deforms the first preform and causes the first thermosetting polymeric material to flow through the runners into the die cavities. After curing, the molded articles consisting of first thermosetting polymeric material are removed from the die cavity, and scrap cull and runner consisting substantially of cheap second thermosetting polymeric material are removed from the mold runners and the bottom of the transfer chamber. Thus, considerable economies are effected.
    Type: Grant
    Filed: June 27, 1975
    Date of Patent: May 4, 1976
    Assignee: Western Electric Co., Inc.
    Inventors: Donald Edward Boesch, Yusuf Taher Koita