Patents by Inventor Robert Marven

Robert Marven 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).

  • Method and apparatus for producing separate unagglomerated pellets of an extrudable material
    Patent number: 4663099
    Abstract: An extruder head 1 for molten material such as polymer has a die plate 6 orificed at 5, rotating blades 11 sweeping over the die plate to operate and fling outwards emerging short lengths 22 of molten material, and a surrounding freestanding wall or curtain of high-pressure water 14 around the blades to entrap and cool separate cut lengths without agglomeration. The wall of water can be formed of merging, or overlapping, flat jets from nozzle 13, and must be essentially uninterrupted viewed from the center of the die plate.
    Type: Grant
    Filed: March 21, 1985
    Date of Patent: May 5, 1987
    Assignee: Extrudaids Limited
    Inventor: Robert Marven