Patents Assigned to Royal Mark Laminates
  • Skeletal frame structure with sheet material cover
    Patent number: 4232489
    Abstract: In a skeletal frame structure having a flexible sheet material cover, such as a greenhouse or the like, a protective tape applied to the frame below the cover to protect it from damage, the tape being characterized by a laminate of insulating plastic foam and a facing layer of silicone-coated kraft paper engageable by the cover.
    Type: Grant
    Filed: June 28, 1979
    Date of Patent: November 11, 1980
    Assignee: Royal Mark Laminates
    Inventors: Edward J. Corvington, Elmer J. Sitter