Patents by Inventor Nicholas Cornelis Vreenegoor

Nicholas Cornelis Vreenegoor 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).

  • Continuous production of polymeric foam
    Patent number: 3998575
    Abstract: This invention relates to the production of continuous length of polymeric foam by depositing a foam mix in a moving open topped trough shaped conveyor by which it is conveyed and in which the mix foams freely and in the region when foaming takes place, contacting each side surface of the rising foam with an upwardly moving surface, preferably a system of upwardly moving wires interposed between each side surface of the rising foam and its adjacent side wall of the trough conveyor, the speed and direction of travel of the system of wires being selected so that the foam emerging from the foaming region has a flat upper surface.
    Type: Grant
    Filed: August 13, 1975
    Date of Patent: December 21, 1976
    Assignee: Unifoam AG
    Inventor: Nicholas Cornelis Vreenegoor
  • Continuous production of polymeric foam
    Patent number: 3965228
    Abstract: This invention relates to the production of continuous lengths of polymeric foam by depositing a foam mix in a moving open topped trough shaped conveyor by which it is conveyed and in which the mix foams freely and in the region when foaming takes place, contacting each side surface of the rising foam with an upwardly moving surface, preferably a system of upwardly moving wires interposed between each side surface of the rising foam and its adjacent side wall of the trough conveyor, the speed and direction of travel of the system of wires being selected so that the foam emerging from the foaming region has a flat upper surface.
    Type: Grant
    Filed: June 12, 1974
    Date of Patent: June 22, 1976
    Assignee: Unifoam AG
    Inventor: Nicholas Cornelis Vreenegoor