Valved sack

Details Valved sack Valved sack

1984-02-13

1985-06-18

Garbe, Stephen P.

Flexible bags

With closure

Self-closing type

383 48, 383 51, 383 52, 383 44, B65D 3024

Patent

active

045244600

ABSTRACT:
A sack is constructed from a thermoplastic film of which the side portions are brought into partial overlapping relationship to define a tube section and top and bottom weld seams are applied transversely. A longitudinal weld seam applied within the confines of the region of overlap terminates at a spacing from the top weld seam to define a filling valve passage. The region of overlap contains a longitudinal inner strip of reduced thickness made in one piece with the walls of the sack.

REFERENCES:
patent: 2651451 (1953-09-01), Bennett
patent: 3040967 (1962-06-01), Klein
patent: 3482762 (1969-12-01), Jones
patent: 3833166 (1974-09-01), Murray
patent: 3937395 (1976-02-01), Lawes
patent: 4073429 (1978-02-01), Lawes

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