Patents by Inventor Robert Marra

Robert Marra 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: 5972265
    Abstract: A method and system (10) for producing a composite material (108) from particles (102) and binder (104), is described. The system includes a feed zone (12), a unilayering zone (14), a mat reforming zone (16) and a compaction zone (18) all closely coupled to reduce time and allow the use of fast setting binders. A preformed feed mat (100) is fed into the spike wheels (22 and 24) of the feed zone. The spike wheels extract particles from the premat and impinge the particles onto an oscillating shield (26) in the layering zone. The oscillating shield moves across the thickness of the mat-forming zone depositing the particles uniformly on the trailing edge of the reformed mat (106) at the top (48A) of the tunnel conveyor (48) of the mat reforming zone. As the particles move past the lower end (26B) of the shield a binder is added to the particles. Overlays or release films (50) are introduced at the top of both sides of the tunnel conveyor so as to engage the surfaces of the reformed mat.
    Type: Grant
    Filed: May 21, 1998
    Date of Patent: October 26, 1999
    Assignee: Forest Products Development Laboratories, Inc. L.L.C.
    Inventors: Alan A. Marra, Robert Marra