Patents by Inventor Stephen B. Matthews

Stephen B. Matthews 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).

  • Heat shrinkable polyethylene film and method for its manufacture
    Patent number: 4277594
    Abstract: Described is a mildly biaxially oriented, blown polyethylene film characterized by a cross directional (CD) shrink force in the range of about 60 to 300 psi, an average heat seal energy of at least about 2.0 in - lbs., an average internal tear resistance of at least about 30 gms/ply, and a minimum shrink temperature no higher than 220.degree. F. and which is less than crystalline melt point (or points) of polyethylene material. This film also has a shrink force in the machine direction (MD) which is typically in the range of about 200 to 300 psi.Also described is the process by which this film is produced.
    Type: Grant
    Filed: May 23, 1979
    Date of Patent: July 7, 1981
    Assignee: Reynolds Metals Company
    Inventors: Stephen B. Matthews, Tomas A. Loredo, Walter H. Knox, III, Herman F. Simmons