Patents by Inventor Clerval Labbe

Clerval Labbe 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).

  • Patent number: 4382757
    Abstract: An improved molding apparatus for expanding beads of polystyrene material into large blocks in the manufacture of insulating material. The mold apparatus has walls made from a plurality of tubular wall members arranged in horizontal, side-by-side relation. The wall members are mounted transversally within encircling frames. Steam is supplied to each wall member, and from within each wall member, into the mold cavity to expand the polystyrene beads held therein into a block. An improved device is also provided to remove the block from the mold cavity.
    Type: Grant
    Filed: April 1, 1981
    Date of Patent: May 10, 1983
    Assignee: Mansonville Plastics Limited
    Inventors: Richard N. Roy, Clerval Labbe, Albert Korman