Patents Assigned to W. E. Rawson Limited
  • Flexible tubular structures
    Patent number: 5672398
    Abstract: A flexible tubular structure for use in the lining of passageways and methods relating thereto are described. The tubular structure is made of a laminate which comprises a film layer, made by melting and mixing ethylene-vinyl acetate copolymer (EVA) and polyethylene, and a felt layer. In a butt join region of the structure, a felt strip and polyethylene/EVA strip are heat welded for strength.
    Type: Grant
    Filed: June 10, 1994
    Date of Patent: September 30, 1997
    Assignee: W. E. Rawson Limited
    Inventor: Alexander Charles Edward Johnson