Bag with closed valve

Details Bag with closed valve Bag with closed valve

1982-06-14

1984-08-07

Garbe, Stephen P.

Flexible bags

Plural

383 44, B65D 3024

Patent

active

044647905

ABSTRACT:
A valve bag and a series of interconnected valve bags is disclosed wherein the bag is constructed from first and second walls, with one wall having first and second overlapping panels. The valve is formed between unsealed portions of the overlapping panels, and other areas of the overlapping portions are sealed together. A tunnel is provided along a first edge of the series of bags so that the series may be guided into a bag filling machine. This tunnel is to be threaded by a mandrel to align the series of bags in the bag filling machine. As constructed, the valves in the bags are sealed closed, and only at the filling machine is the tunnel slit open by a cutter to expose the exterior opening of the valve so that the bag may be filled through this valve.

REFERENCES:
patent: 3559874 (1971-02-01), Titchenal
patent: 3746246 (1973-07-01), Murray
patent: 3779449 (1973-12-01), Membrino
patent: 3791573 (1974-02-01), Titchenal et al.
patent: 4073429 (1978-02-01), Lawes

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