Film blowing apparatus

Details Film blowing apparatus Film blowing apparatus

1991-03-22

1992-06-16

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Production of continuous or running length

264 37, 264101, 425 721, 4253261, 425388, B29C 4788

Patent

active

051223295

ABSTRACT:
A film blowing apparatus for the production of blown polymeric films includes a modified air ring which includes means for the continuous or periodic collection and removal of liquids from the proximity of the circular die which may condense, and further, optionally includes the further step of providing means, preferably a vacuum pump, for withdrawing and optionally collecting the condensed liquids from the surface of the modified air ring facing the blown film.

REFERENCES:
patent: 2177633 (1934-10-01), Blackard
patent: 2641022 (1953-06-01), Kress
patent: 2668323 (1954-02-01), Johnson
patent: 3226459 (1965-12-01), Tijunelis
patent: 3311682 (1967-03-01), Ringley et al.
patent: 3331901 (1967-07-01), Thomas
patent: 3337663 (1967-08-01), Taga
patent: 3576929 (1971-04-01), Turner et al.

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