Patents Assigned to Petro Plastics Company, Inc.
  • Patent number: 4563381
    Abstract: An extruded thermoplastic hinge having drastically improved ability to withstand flexure cycles at room as well as at low temperatures is disclosed. The hinge comprises a flexible cross-section of polyester elastomer and a co-extruded section of rigid or semi-rigid thermoplastic material selected from the group comprising rigid polyvinyl (PVC), acrylonitrile-butadyene-styrene (ABS), impact modified or general purpose acrylic or high impact styrene. The flexure cross-section may have the thickness ranging from ten percent to 100% of the thickness of the semi-rigid cross-section.
    Type: Grant
    Filed: November 5, 1984
    Date of Patent: January 7, 1986
    Assignee: Petro Plastics Company, Inc.
    Inventor: Rommel J. Woodland