Turning panel flap of zipper-equipped package material

Details Turning panel flap of zipper-equipped package material Turning panel flap of zipper-equipped package material

1985-10-15

1987-03-03

Sipos, John

Package making

Progressively seamed cover web or web folds

With closing of web between package units

53568, 53382, 493244, 493410, 493439, B65B 906

Patent

active

046465111

ABSTRACT:
A feed conveyor arrangement is disclosed for horizontally unwinding zipper-equipped sheet packaging material from a supply roll and turning back a flap portion of the sheet material for reception of product prior to delivery into a form, fill, and seal machine. The feed conveyor utilizes a special guide wheel device for maintaining the zipper, and hence the sheet material, in an aligned flow path and holding down the flap portion only adjacent the zipper. A subsequent flap turning wheel device turns the flap portion away from the remaining panel area of the sheet below the zipper line, pivoting the flap about the hold down area of the guide wheel device. The guide wheel device is in the form of skewed wheels acting on the upper surface of the flap at opposed sides of the zipper. The flap turning wheel device includes an offset wheel which applies both upward and horizontal forces to the upturned inner surface of the flap to open up the sheet material.

REFERENCES:
patent: 2762273 (1956-09-01), Harker
patent: 3012603 (1961-12-01), Newsome
patent: 3274746 (1966-09-01), James
patent: 3291007 (1966-12-01), McDowell
patent: 3389532 (1968-06-01), Stelzer
patent: 3613524 (1971-10-01), Behr
patent: 4260116 (1981-04-01), Collin
patent: 4449351 (1984-05-01), Henderson

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