Patent ID: 9278478
Filing Date: 2016-03-08
CPC Classification: B29C,B29K,B29L,Y10T

Claim Text:
1. A method of providing a liner or lining for a tank, the method comprising: positioning a pair of sheets adjacent each other to form a gap therebetween; extrusion welding the pair of sheets together by infusing a molten thermoplastic material along an interface and within the gap between the pair of sheets; positioning the pair of sheets adjacent a bottom sheet to form a gap between the pair of sheets adjacent and the bottom sheet; extrusion welding the pair of sheets to the bottom sheet by infusing the molten thermoplastic material along an interface and within the gap between the pair of sheets and the bottom sheet; and positioning the pair of sheets and the bottom sheet within a tank; wherein another gap is adjacent at least one wall of the tank and at least one of the bottom sheet and a sheet of the pair of sheets, and wherein extrusion weld material is infused within said another gap and penetrates to the at least one wall of the tank.