Plastic bag with zig zag plies

Details Plastic bag with zig zag plies Plastic bag with zig zag plies

1973-12-28

1976-11-09

Price, William

Envelopes, wrappers, and paperboard boxes

File folder or file envelope

Hanging type

B65D 3114

Patent

active

039906280

ABSTRACT:
A plastic bag with zig zag plies provided with a tubular valve foil sealed on the one hand to an outwardly folded tubular foil part originally situated between two incisions along zig zag ply edges and on the other hand to an end seal of the tubular foil and at last to the tubular foil by a seal extending between the end points of the said incisions and said end seal.
The plastic bag may be provided with an outer lining or covering bag for protecting the bag. The covering bag is provided with an opening for passage of the tubular valve foil.

REFERENCES:
patent: 1819425 (1931-08-01), Kronmiller
patent: 2340546 (1944-02-01), Meaker
patent: 2959343 (1960-11-01), Rosander
patent: 3004698 (1961-10-01), Ashton
patent: 3167241 (1965-01-01), Woerner

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