Patent ID: 6660350
Filing Date: 2003-12-09
Classification: B23K,B32B,F16L,Y10T

Abstract:
A multi-layer tube, comprising:metal tube having an outer surface and an end; a corrosion resistant layer bonded to the metal tube outer surface, wherein the corrosion resistant layer comprises a zinc layer; a surface treatment layer bonded to the corrosion resistant layer; a first polymeric layer disposed on the surface treatment layer; a second polymeric layer disposed on the first polymeric layer; a laser-removed portion of the metal tube outer surface, being adjacent and disposed 360Â° about the end, the laser-removed portion being substantially free from the first and second polymeric layers, while leaving at least the corrosion resistant layer intact; and a generally tapered transition portion of the polymeric layers, extending from an upper surface of the second polymeric layer toward the laser-removed portion of the metal tube outer surface circumference at the end.