Blown film tube diameter control apparatus

Details Blown film tube diameter control apparatus Blown film tube diameter control apparatus

1985-12-12

1987-10-13

Chiesa, Richard L.

Plastic article or earthenware shaping or treating: apparatus

Control means responsive to or actuated by means sensing or...

Control means responsive to product weight or dimension

137223, 264 401, 264563, 264569, 425 72R, 4253261, 4253871, B29C 4792

Patent

active

046995803

ABSTRACT:
A workpiece position control apparatus, specifically an apparatus for controlling the diameter of blown film tube, is disclosed. The apparatus includes at least one fluid nozzle, pressure sensing means for signalling the pressure of a fluid passing through the at least one nozzle and impinging on a workpiece when the workpiece is in a first position and for signalling the pressure of the impinging fluid when the workpiece is in at least one second position, and controlling means for adjusting the position of the workpiece in response to signals from the pressure sensing means.

REFERENCES:
patent: 3024404 (1962-03-01), Ziffer
patent: 3125616 (1964-03-01), Cook et al.
patent: 3492386 (1970-01-01), Ohmasa et al.
patent: 3771931 (1973-11-01), Fischer et al.
patent: 3853448 (1974-12-01), Yazawa
patent: 4069292 (1978-01-01), Herrington et al.
patent: 4140460 (1979-02-01), Carlsen
patent: 4189288 (1980-02-01), Halter
patent: 4192637 (1980-03-01), Chong
patent: 4265853 (1981-05-01), Havens
patent: 4479766 (1984-10-01), Planeta

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