Patent ID: 7641756
Filing Date: 2010-01-05
Classification: B29C,F16L

Abstract:
1. A method for lining a duct having an inner wall with a sealing inner lining in the form of a tubing adhering by means of adhesive to the duct inner wall, the tubing having a first end, a second end, a retaining tape coupled to the second end, the tubing comprising a coated material comprising at least one of a woven fabric, meshing, knitted fabric or non-woven fabric, the method comprising the steps of: filling the tubing with a metered amount of an uncured adhesive so that the adhesive is evenly distributed over the tubing's entire length, introducing the tubing including the uncured adhesive into the duct while holding the first end of the tubing, the tubing being introduced by means of fluid pressure application inverting the tubing within the duct as a controlled moving inversion point, the tubing second end and retaining tape traveling though the tubing during the introducing step, creating conditions for curing the adhesive located only on the inverted portion of the tubing including a step of irradiating the adhesive by at least one radiation unit coupled to the retaining tape, the at least one radiation unit emitting UV rays, IR rays, Microwaves or ultrasound, and holding an internal pressure in the introduced tubing in order to press the tubing against the inner wall of the duct, until the adhesive between the tubing and duct inner wall has cured.