Flattening and take-off apparatus for providing a plastic film w

Details Flattening and take-off apparatus for providing a plastic film w Flattening and take-off apparatus for providing a plastic film w

1986-06-10

1987-07-28

Chiesa, Richard L.

Plastic article or earthenware shaping or treating: apparatus

Shaping orifice and downstream work contacting gaseous...

2642093, 264563, 4253021, 425325, B29C 5310

Patent

active

046829415

ABSTRACT:
Flattening and take-off apparatus for use with a device for providing a blown tubular film. The apparatus includes a flattening device for flattening the tubular film, and a cutting device for cutting one lateral edge of the flattened film. A pair of pinch rollers is provided and is driven to carry the cut and flattened film to an unfolding device, which is defined by a pair of edges that are inclined relative to the direction of movement of the film web, and over which respective ones of the juxtaposed portions of the cut flattened web are adapted to pass to define a single ply web. The pinch rolls include removable spacing rings to prevent the formation of a fold line on the opposite lateral edge from the cut edge of the flattened film. The unfolding device is movable laterally and parallel to the direction of movement of the film.

REFERENCES:
patent: 3167814 (1965-02-01), Corbett
patent: 3355770 (1967-12-01), Augustin
patent: 3436442 (1969-04-01), Saks
patent: 3472924 (1969-10-01), Sederlund et al.
patent: 3560600 (1971-02-01), Gliniecki
patent: 3574806 (1971-04-01), Potter et al.
patent: 3784347 (1974-01-01), Robinson
patent: 3905736 (1975-09-01), Bringman
patent: 4127371 (1978-11-01), Luthra
patent: 4270891 (1981-06-01), Hopper
patent: 4533309 (1985-08-01), Planeta

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