Method and apparatus for manufacturing non-round plastic tubing

Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor

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Details

15624418, 156252, 156259, 156264, 156292, 1563082, 156500, 156517, 156519, B29C 2908

Patent

active

043571905

ABSTRACT:
This application discloses the method and apparatus for manufacturing plastic tubing which comprises a rigid semiround, triangular, or the like top section and a flat base of flexible sheet-like material. The manufacturing comprises the steps of or apparatus for (a) extruding a sleeve of thermoplastic material, (b) blow molding a corrugated generally tubular structure, (c) cooling the generally tubular structure, (d) splitting the generally tubular structure into a pair of semiround corrugated tubing structures, (e) bonding a strip of sheet-like material across the open base of the semiround tubing, (f) folding the semiround tubing longitudinally to a flattened configuration, and (g) coiling the tubing in its flattened configuration.

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