ALEXANDRIA, Va., April 7 -- United States Patent no. 12,594,707, issued on April 7, was assigned to WUXI BOYU PLASTIC MACHINERY Co. LTD. (Wuxi, China).
"PVC flooring production line" was invented by Dingyi Lu (Wuxi, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A polyvinyl chloride (PVC) flooring production line includes a loading system, an internal-mixing extrusion device, a calendering lamination device, a cooling device, a tractor, and a cutter that are arranged sequentially along a material conveying direction, where the internal-mixing extrusion device includes an internal mixing mechanism, an extrusion mechanism, and a hopper. In an internal mixing stage of the internal-mixing extrusion device,...