Valved bag

Details Valved bag Valved bag

1984-06-25

1986-01-21

Garbe, Stephen P.

Flexible bags

With closure

Self-closing type

383 52, B65D 3029

Patent

active

045661316

ABSTRACT:
A valved bag consists of a collapsed section of a tubular plastic film, which has been formed in that the side portions of a plastic film web have been infolded to overlap each other and which has been provided with transverse top and bottom seam welds and in the overlap area of the side portions has been provided with two spaced apart parallel longitudinal seams, which join only said side portions and terminate or are interrupted at a distance from the top seam weld so as to provide a filling passage. In order to simplify the manufacture of the valved bags, the longitudinal seams consist of strips of adhesive and are in contact with both side portions of the film web at both edges of the overlap area. One of said side portions is provided with an adhesive bond-inhibiting agent adjacent to the filling passage at least across the strip of adhesive.

REFERENCES:
patent: 3040967 (1962-06-01), Klein
patent: 3371849 (1968-03-01), Rochla
patent: 3394871 (1968-07-01), Williams et al.
patent: 3410300 (1968-11-01), Mondano
patent: 3456868 (1969-07-01), Snabb et al.
patent: 3833166 (1974-09-01), Murray

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