Patents by Inventor Hermanus A. Wallink

Hermanus A. Wallink 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 of making products consisting of foamed and/or cross-linked synthetic polymers
    Patent number: 4409164
    Abstract: A process is described for improving the rate of production, other conditions being equal, of extruded polymer products, containing foaming- and/or cross-linking agents, which particularly resides in using a "melting torpedo" rotatable element in the melting section of the extrusion apparatus.
    Type: Grant
    Filed: March 25, 1981
    Date of Patent: October 11, 1983
    Assignee: Stamicarbon, B.V.
    Inventors: Albert J. H. Brasz, Hermanus A. Wallink
  • Method for the forming of plastics
    Patent number: 4388262
    Abstract: Method for the forming of thermoplastic and/or elastomeric resins, in which method use is made of a melt torpedo in the melting zone of a processing machine having a screw. The torpedo has grooves and ridges with a helix angle of preferably between 55.degree. and 75.degree.. The final melt temperature, that is the temperature at the beginning of the outlet of the processing machine is chosen lower than that applied in the same processing machine without a torpedo.
    Type: Grant
    Filed: February 20, 1981
    Date of Patent: June 14, 1983
    Assignee: Stamicarbon, B.V.
    Inventors: Albert J. H. Brasz, Hermanus A. Wallink