ALEXANDRIA, Va., Aug. 5 -- United States Patent no. 12,697,807, issued on Aug. 4, was assigned to KREAFIN GROUP SA (Luxembourg) and LICOPLAST SA (Battice, Belgium).
"Method for forming a stress-free multilayer PVC sheet material" was invented by Yves Michel (Meldert, Belgium) and Willy D'Hondt (Deinze, Belgium).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method for forming a multilayer plastic sheet material is disclosed, where a first polymer mass is melted under pressure and is passed through an extruder head at a specified discharge rate in the form of a plastic strand in sheet form that is provided with one or more layers so that a multilayer plastic strand is formed. This is passed to two or more ro...