Process and apparatus for forming a plastic film

Details Process and apparatus for forming a plastic film Process and apparatus for forming a plastic film

1981-05-26

1983-08-16

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Production of continuous or running length

264567, 264569, 425 72R, 4253261, B29D 722

Patent

active

043990940

ABSTRACT:
A plastic film is formed by annealing a molten tubular film in a first enclosed space and immediately thereafter directing cold air perpendicular to the axis thereof and expanding and solidifying the film in a second enclosed space while in contact with cold air flowing parallel to film travel.

REFERENCES:
patent: 3167814 (1965-02-01), Corbett
patent: 3221084 (1965-11-01), Peticolas
patent: 3243486 (1966-03-01), Pilaro
patent: 3307218 (1967-03-01), Reifenhauser
patent: 3363035 (1968-01-01), Niiho et al.
patent: 3548042 (1970-12-01), Hinrichs
patent: 3888609 (1975-06-01), Saint Eve et al.
patent: 4330501 (1982-05-01), Jones et al.

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