Patent ID: 6395127
Filing Date: 2002-05-28
Classification: B29C

Abstract:
A combination comprising an insert for use in conjoining plastic tubular end portions to form a beadless weldment and a pair of plastic tubular end portions to be joined, the tubular end portions each having an interior surface, the insert comprising:a) a first core portion, generally cylindrical in shape, having a longitudinal axis and a first circumferential exterior surface; b) a second tubing contact portion having a longitudinal axis and comprised of a skirt portion having a second circumferential surface and a third circumferential surface, the skirt coextensive intermediate the second and third circumferential surfaces, the second and third circumferential surfaces in concentric relation to each other, the second tubing contact portion operatively connected to the first core portion and longitudinally movable relative to said first core portion whereby the insert has a first conjoining configuration and a second removal configuration; wherein when the insert is in the first conjoining configuration and is positioned within the tubular end portions with the end portions aborted for conjoining same, the circumferential exterior surface of the first core portion is in support in contact the second circumferential surface of the skirt portion, and the third circumferential surface of the skirt portion is facing radially outward and is in supporting contact with the interior surfaces of tubular end portions; wherein when the insert is in the second removal configurations, the first circumferential exterior surface of tie first core portion is not in supporting contact with the second inwardly facing surface of the second tubing contact portion and the third circumferential surface of the skirt portion is not in supporting contact with the interior surfaces of the tubular end portions and is facing radially inward thereby facilitating withdrawal of the insert from the weldment.