US Patent Issued to W.E.Rawson on March 18 for "Sealing of pipe liners" (British Inventors)

ALEXANDRIA, Va., March 19 -- United States Patent no. 12,251,887, issued on March 18, was assigned to W.E.Rawson Ltd. (Wakefield, Great Britain).

"Sealing of pipe liners" was invented by David John Blades (Wakefield, Great Britain) and Alexander Charles Edward Johnson (Wakefield, Great Britain).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention provides a method and apparatus of manufacturing a pipe liner for lining the inside of a pipe, for example a water or sewerage pipe requiring repair. The pipe liner is mainly formed of a fabric sleeve, or a plurality of fabric sleeves, and comprises a fluid-proof barrier coating on the inside surface of the pipe liner. The method involves arranging a ...