Thermoplastic bag and method of forming the same

Details Thermoplastic bag and method of forming the same Thermoplastic bag and method of forming the same

1984-02-29

1986-09-23

Moy, Joseph Man-Fu

Flexible bags

Lifting or suspending element

Unitary with bag

383120, 383126, 383903, 206554, B65D 3310

Patent

active

046139885

ABSTRACT:
A plastic film sack having gussetted side walls, and in the bottom of said sack, a heat-seal stripe welding together the four film layers in the gusseted regions of the sack and a heat seal stripe welding together the two film layers between said gusseted regions; and between the heat-seal stripes of the four film layers and the heat-seal stripe of the two film layers are unsealed, arcuate stress-relief regions and the method of forming the same.

REFERENCES:
patent: 2689594 (1954-09-01), Wendt
patent: 3064652 (1962-11-01), Corcoran et al.
patent: 3133691 (1964-05-01), Corbett
patent: 3142437 (1964-07-01), Grant et al.
patent: 3378189 (1968-04-01), Dickson
patent: 3970130 (1976-07-01), Casey
patent: 4401427 (1983-08-01), Benoit et al.
patent: 4476979 (1984-10-01), Reimann et al.
patent: 4491959 (1985-01-01), Leofberg

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