Patent ID: 6521072
Filing Date: 2003-02-18
Classification: B29C,B29L,Y10T

Abstract:
A method of coupling profile wall thermoplastic pipes, the method comprising the steps of:providing first and second thermoplastic pipes, each pipe having first and second coaxial, radially spaced cylindrical wails and rib portions joining the first and second walls, the first walls of both the first and second pipes being one of interior and exterior walls of the first and second pipes and the second walls of both the first and second pipes being the other of the interior and exterior walls, the first pipe having a first end margin of a first axial length extending from an end of the first pipe and the second pipe having a second end margin of a second axial length extending from an end of the second pipe; removing from the first end margin substantially all of the rib portions and substantially all of the first wall of the first pipe; removing from the second end margin substantially all of the rib portions of the second pipe; and coupling the first pipe with the second pipe such that at least a portion of the second wall of one of the first and second end margins overlaps at least a portion of the second wall of the other of the first and second end margins in a manner allowing the second wall of the first pipe to be secured to the second wall of the second pipe.