Biaxial film process and rotary apparatus therefor

Details Biaxial film process and rotary apparatus therefor Biaxial film process and rotary apparatus therefor

1977-05-05

1978-09-05

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264209, 264210R, 264290R, 264345, 425 72R, 4253261, 425379R, B29D 2304

Patent

active

041120345

ABSTRACT:
In a biaxial blown tube synthetic resin film making apparatus, the extruder die, mandrel, the reheat ovens, and a hot air ring are caused to rotate and oscillate about a stalk moving coaxially therethrough to provide an improved flatter and more uniform film.

REFERENCES:
patent: 3210803 (1965-10-01), Najar
patent: 3296343 (1967-01-01), Buttolph et al.
patent: 3388426 (1968-06-01), Schott, Jr.
patent: 3450806 (1969-06-01), Matsuo et al.
patent: 3775523 (1973-11-01), Haley
patent: 3891374 (1975-06-01), Ninomiya et al.
patent: 3989785 (1976-11-01), Bridge
patent: 4008022 (1977-02-01), Carrico
patent: 4009975 (1977-03-01), Ninomiya et al.

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