Patents by Inventor Martin Fichlseder

Martin Fichlseder 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).

  • Process for production of an injected molded part
    Patent number: 4880587
    Abstract: An injection molded part of thermoplastic material, in particular an information carrier disk, is produced by cutting and removal of a sprue part from the injection molded part. The sprue removal leaves an opening in the injection molded part. In order to obtain a clean and smooth opening surface with a fit diameter that is as accurate as possible, the sprue part is axially offset relative to the injection molded part so that the integral connection between these two parts extends only over a part of the opening. The diameter of the axially projecting part is equal to or larger than the diameter of the opening and the rest of the opening being produced by injection molding. The dimensions are advantageously chosen so that a parting edge inclined at an angle of 45.degree. to the plane of the opening is formed and that the injection molded part amounts to 70% and the part to be separated to 30% of the length of the opening. The injection molded length of the opening may also be variable.
    Type: Grant
    Filed: January 13, 1988
    Date of Patent: November 14, 1989
    Assignee: Krauss-Maffei A.G.
    Inventors: Martin Fichlseder, Ingo Preuss