Apparatus for producing blown synthetic-resin foils and films

Details Apparatus for producing blown synthetic-resin foils and films Apparatus for producing blown synthetic-resin foils and films

1978-05-12

1980-02-19

Thurlow, Jeffery R.

Plastic article or earthenware shaping or treating: apparatus

Shaping orifice and downstream work contacting gaseous...

264 401, 264 403, 264 406, 264 407, 264565, 264569, 425140, 425141, 4253261, B29D 2304

Patent

active

041892887

ABSTRACT:
A coupling circuit for the feedback loops of foil-thickness control circuit, a calibrator height-adjusting control circuit, a calibrator diameter-setting control circuit and a balloon-filling control circuit interlocks the control circuits and shifts the responses thereof upon start-up of a film or foil blowing apparatus. The latter also includes the usual blowing heads, connected to a worm extruder, the calibrating basket, the balloon-flattening device, the drawing rollers and the winding device which rolls up the flattened web of blown film.

REFERENCES:
patent: 3092874 (1963-06-01), Fallwell
patent: 3286302 (1966-11-01), Doering
patent: 3307218 (1967-03-01), Reifenhauser
patent: 3596321 (1971-08-01), Upmeier
patent: 3749540 (1973-07-01), Upmeier
patent: 3990824 (1976-11-01), Behr
patent: 4101614 (1978-07-01), Havens

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