Tubular extrudate

Details Tubular extrudate Tubular extrudate

1977-06-07

1978-12-19

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Producing multilayer work or article

264519, 264 90, 264558, 264173, 264178R, 264180, 264210R, 425 71, B29C 1700, B29D 2304

Patent

active

041306163

ABSTRACT:
Cooling a tubular extrudate for conversion to tubular film by passing the extrudate through a bath of cooling liquid so that the external surface of the extrudate contacts in sequence countercurrent streams of cooling liquid in a quiescent zone, a restricted throttle zone and a spiral flow zone.

REFERENCES:
patent: 3337663 (1967-08-01), Taga
patent: 3344474 (1967-10-01), Davis et al.
patent: 3402428 (1968-09-01), Schreiber
patent: 3427375 (1969-02-01), Turner
patent: 3622657 (1971-11-01), North et al.
patent: 3717425 (1973-02-01), North et al.
patent: 3819776 (1974-06-01), Robinson et al.
patent: 3886243 (1975-05-01), Uemura et al.

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