Method for producing a flat bottom plastic bag

Details Method for producing a flat bottom plastic bag Method for producing a flat bottom plastic bag

1979-08-30

1981-06-16

Coan, James F.

Manufacturing container or tube from paper; or other manufacturi

Container making

Pliable container

493244, 493256, 493267, B31B 142, B31B 154, B31B 180

Patent

active

042735505

ABSTRACT:
A flat-bottom bag is produced from a heat sealable tubular material having gusseted sides by clamping front and back walls in a central longitudinal region, flaring the gussets outward to about 180.degree. to provide a corner gusset tuck and refolding the gussets to their original position with the corner tucks in position between the gussets.

REFERENCES:
patent: 407813 (1889-07-01), Burdick
patent: 503810 (1893-08-01), Stanley
patent: 711369 (1902-10-01), West
patent: 715360 (1902-12-01), Dulin
patent: 2412501 (1946-12-01), Gardner
patent: 3606822 (1971-09-01), Platz et al.
patent: 3669347 (1972-06-01), Platz et al.
patent: 3799042 (1974-03-01), Platz et al.
patent: 3886850 (1975-06-01), Cole
patent: 3896709 (1975-07-01), Brinkmeier
patent: 3967544 (1976-07-01), Brock et al.

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