Biaxial film process and rotary apparatus therefor

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

1978-04-10

1981-03-03

Ansher, Harold

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

264209, 2642107, 264310, 264345, 264503, 264567, 361313, 361323, 428218, 428461, 428523, 428910, B29D 2309, H01G 418, B32B 1508

Patent

active

042541832

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.

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patent: 4112034 (1978-09-01), Nash et al.
patent: 4115048 (1978-09-01), Alderfer et al.

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