Back to results
US 5,732,743 AGranted
Method of sealing pipes
AssigneeLS Technology Inc.
InventorMark Livesay
Life of this patent
Estimating the term…
Abstract
The present invention relates to a method for joining and repairing pipes. More particularly, the invention provides a means for quickly repairing or sealing pipes utilizing photocurable resins in the form of a fabric patch. A photocurable flexible prepreg fabric is wrapped over the entire area of the pipe to be joined or repaired. Preferably, the prepreg fabric contains multiple layers of varying widths and lengths. The prepreg fabric is then exposed to UV radiation which cures and seals the pipe.
Claims13
A method of forming an overwrap joint seal for joining pipes and repairing a pipe, said method comprising the steps of:
- a) applying a photocurable flexible prepreg fabric over said pipe or pipes such that it covers the area to be joined or repaired, said prepreg fabric being covered by an UV blocking release film;
- b) removing said release film;
- and
- c) exposing said prepreg fabric to UV radiation such as to allow said prepreg fabric to cure under ambient conditions for an effective amount of time until said area to be joined or repaired is sealed;
- wherein said prepreg comprises at least two different layers of varying widths and lengths such that each layer is shorter and narrower than the layer immediately above it;
- wherein said bottom layer includes a first water curable urethane;
- and wherein each succeeding layer includes a second water curable urethane and bond selected from the group consisting of a photocurable resin and an adhesive.
4 more elements
Dependencies are inferred from the claim text.