Apparatus for helically slitting a continuous tubular film of sy

Details Apparatus for helically slitting a continuous tubular film of sy Apparatus for helically slitting a continuous tubular film of sy

1987-04-14

1989-03-07

Gorski, Joseph M.

Metal working

Bias cutting of tubular stock

With means to feed stock along support or mandrel

29 214, 83154, B21D 4302

Patent

active

048094137

ABSTRACT:
In an apparatus for helically slitting a continuous tubular film of synthetic thermoplastic material, a pair of feed rollers for feeding flattened continuous tubular film to a mandrel are mounted at fixed locations in a main frame. A rotary support mounted in the main frame carries the mandrel which consists of spaced apart low-friction bars disposed in a circular array concentric to the axis of rotation of the rotary support. A cutter is adapted to slit the tubular film as it traverses the mandrel. The axis of rotation of the support is aligned with the nip between the feed rollers approximately at the center of their length. A reversing rod and a deflecting or guide roller are connected to the rotary support for guiding the slit film from the mandrel to a winder. The winder has a winding axis aligned with or intersecting the axis of rotation of the rotary support at a right angle. A spreader for opening out the film is disposed between the feed rollers and the mandrel. The apparatus may be disposed vertically or horizontally.

REFERENCES:
patent: 1504255 (1924-08-01), MacDonald
patent: 1753645 (1930-04-01), Camfield
patent: 2644522 (1953-07-01), Parker et al.
patent: 2987796 (1961-06-01), Evans et al.
patent: 3161942 (1964-12-01), Cheney
patent: 4047272 (1977-09-01), King et al.
patent: 4165052 (1979-08-01), Seibert

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