Apparatus for flattening a blown foil tube of thermoplastic synt

Details Apparatus for flattening a blown foil tube of thermoplastic synt Apparatus for flattening a blown foil tube of thermoplastic synt

1995-03-16

1996-06-25

Chiesa, Richard L.

Plastic article or earthenware shaping or treating: apparatus

Shaping orifice and downstream work contacting gaseous...

425325, 425392, B29C 5320

Patent

active

055294707

ABSTRACT:
In a foil blowing apparatus, the distribution of singularity in the flattened foil tube over the length of a roll in which the tube is coiled are distributed by a fold shifting device above the squeezing rollers at the top of the foil blowing unit. The fold shifting device has three sets of pivotal planes each formed by a deflecting roller and a turning bar and oriented so that the maximum angle between each approaching stretch of the flattened tube and a perpendicular to the turning bar is 30.degree. and the maximum angle of each departing stretch and the perpendicular to the turning bar is 30.degree..

REFERENCES:
patent: 2844846 (1958-07-01), Kronholm
patent: 3804572 (1974-04-01), Upmeier
patent: 4643656 (1987-02-01), Karl
patent: 4676728 (1987-06-01), Planeta
patent: 4836744 (1989-06-01), Karl et al.
patent: 5360328 (1994-11-01), Cree et al.
patent: 5437544 (1995-08-01), Achelphl

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