Collapsible web apparatus

Details Collapsible web apparatus Collapsible web apparatus

1979-10-11

1981-03-17

Sipos, John

Package making

Apparatus for contraction of cover by stretching or shrinking

53587, B65B 1104

Patent

active

042559189

ABSTRACT:
The present invention comprises a wrapping apparatus having a frame, a reciprocally driven carriage moveably mounted on the frame, the carriage being adapted to hold a rotatable roll of stretchable film material and a film width varying mechanism. A driven rotatable turntable adapted to support a load is positioned adjacent to the frame, and the leading edge of the film material is held adjacent the load. A brake is connected to the film roll to restrict movement of the web of material from the roll and the film width varying mechanism is mounted in the material path so that the film web travels through a pivotable "C" shaped assembly of the film width varying mechanism which when pivoted by spring action reduces the film web width, so that the film material is stretched and reduced in width as it leaves the roll. The carriage is driven along the frame in one direction to provide a wrap for a load and returns in an opposite direction while continuing to wrap the load, at which time the material web is severed from the material roll dispenser.

REFERENCES:
patent: 4077179 (1978-03-01), Lancaster et al.
patent: 4152879 (1979-05-01), Shulman
patent: 4204377 (1980-05-01), Lancaster et al.
The Digest by Infra Pak, Dec. 1977.
The Digest by Infra Pak, Sep. 1977.

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