Importance

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Abstract

A tubular assembly which includes a first (or outer) tube (12), a second tube (21) is described. A portion of the second tube (21) resides within the first tube (12). The first tube (12) has a plurality of perforations (15) having edges (18), and the exterior surface (32) of the second tube (21) has a plurality of indentations (24), at least some of which are aligned with the perforations (15) in the first tube (12). Alternatively, or in addition thereto, the interior surface (35) of the first tube (12) has a plurality of indentations (59), at least some of which are aligned with a plurality of perforations (47) having edges (50) in the second tube (21). The tubular assembly is prepared by molding plastic material (e.g., thermoplastic material) through at least some of the perforations (e.g., in the first tube) into and at least partially filling the indentations aligned therewith (e.g., in the exterior surface of the second tube). The first and second tubes are fixedly attached one to the other by means of the edges of the perforations in one tube being embedded in the plastic material extending therethrough and at least partially filling the aligned indentation of the other tube.

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First Claim