Pipes and tubular conduits – Combined – With end structure
Patent
1991-08-13
1993-04-20
Bryant, III, James E.
Pipes and tubular conduits
Combined
With end structure
138118, 138177, 222107, B65B 316
Patent
active
052033791
ABSTRACT:
A headed thermoplastic tube is formed solely from a thermoplastic extruded, stretched, cylinder by positioning the cylinder over a forming mandrel with an exposed portion. The inner surface of the exposed portion is heated above the glass transition temperature of the thermoplastic material to render the inner surface molten while the outer surface provides support for the exposed portion of the cylinder. The heated exposed portion is then shaped into a conical shape, such as by heating the outer surface, and pressure applied to the conical shaped exposed portion to form a headed thermoplastic tube. The headed tubes produced have a body portion, shoulder portion and neck portion, without any seams, all of which are formed from the starting thermoplastic extruded, stretched cylinder.
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Holoubek George H.
Rhoades John J.
Bryant III James E.
Courtaulds Packaging Inc.
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