Patents by Inventor Hendrik van Dalen

Hendrik van Dalen 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 and device for injection-molding plastics
    Patent number: 4420452
    Abstract: Process and device for injection molding plastics. The injection material charge is introduced into the mold to obtain an uninterrupted flow front by initially injecting the material into the mold through at least one first gate and through a subsequent gate or gates only after the flow front passes the subsequent gate(s). An injection molding device having separately and variously controllable valves located in the supply lines interconnecting an injection molding apparatus, mold and gates.
    Type: Grant
    Filed: June 26, 1981
    Date of Patent: December 13, 1983
    Assignee: Stamicarbon B.V.
    Inventors: Hendrik van Dalen, Willem Schlosser