Patents by Inventor David Dumbleton

David Dumbleton 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).

  • Multilayered sheet and method of making same
    Publication number: 20070196678
    Abstract: A multilayered sheet (10) is made by extruding a sheet (20) and bringing it into immediate contact with a non-woven sheet (40) before bringing the abutting sheets into a first nip (201) formed by a pair of pressure rollers (121,122). The multilayered sheet (10) then passes through a second nip (202) formed between two pressure rollers (122,123) and is cooled down through a series of additional chill rollers (123,124,125,126).
    Type: Application
    Filed: February 8, 2007
    Publication date: August 23, 2007
    Inventors: Jack Graham, David Dumbleton