Apparatus for making tubing from thermoplastic synthetic...

B - Operations – Transporting – 29 – D

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18/522.5

B29D 23/18 (2006.01) B29C 49/00 (2006.01)

Patent

CA 1071363

APPARATUS FOR MAKING TUBING FROM THERMOPLASTIC SYNTHETIC MATERIAL Abstract of the Disclosure: A tubular parison of synthetic plastic material in thermoplastic condition is extruded into a travelling mold wherein it is formed into a corrugated tube. The travelling mold is formed when cooperating mold sec- tions of two endless strings of such mold sections move together and travel for some distance in a straight path before moving apart again. Each mold section has front and rear guide rollers which travel ii guide channels that are 50 configurated as to impart to the mold sections the aforementioned movements toward and away from each other. -2-

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