Bag stacking machine

Details Bag stacking machine Bag stacking machine

1988-08-29

1990-03-20

Schmidt, Frederick R.

Manufacturing container or tube from paper; or other manufacturi

Container making

Pliable container

493239, 493360, 493437, 493442, 493444, 493445, B31B 156

Patent

active

049097792

ABSTRACT:
A web of flat plastic bag stock formed with transverse perforations and heat seals is separated into individual bags, then individually formed in plural folds and the folded bags are stacked for packaging. To form as many as three folds, four rollers are used. The individual, separated bag is forced between the first and second rolls by a reciprocating first "blade" which contacts the middle of the bag. After being formed with the first fold, the bag is forced between the second and third rolls by a reciprocating second "blade". The twice-folded bag is then forced between the third and fourth rolls by a third reciprocating "blade" and, after the third fold, is conveyed away on belts to a stacking station where plural bags are deposited as a layer on a table. The layers may be packaged by hand or by suitable machinery.

REFERENCES:
patent: 2253446 (1941-08-01), Spiess
patent: 4197045 (1980-04-01), Stauber
patent: 4526565 (1985-07-01), Hummel et al.
patent: 4569672 (1986-02-01), Marion et al.
patent: 4688708 (1987-08-01), Irvine et al.
patent: 4725180 (1988-02-01), Kasamatsu et al.
patent: 4746108 (1988-05-01), Hirayama et al.

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