Reclosable twin-Z-fold dispensing valve construction for a liqui

Details Reclosable twin-Z-fold dispensing valve construction for a liqui Reclosable twin-Z-fold dispensing valve construction for a liqui

1977-01-03

1978-04-25

Peters, Jr., Joseph F.

Envelopes, wrappers, and paperboard boxes

File folder or file envelope

Hanging type

B65D 3338

Patent

active

040858863

ABSTRACT:
An automatically reclosable dispensing valve construction for a liquid-containing film pouch of the type comprising first and second flexible film walls or sides joined together at their peripheral edges. A twin-Z fold, incorporating both sides of the pouch, is formed extending between two spaced apart pouch edge portions and the edge portions of the pouch at the fold are joined together to maintain the fold. When a portion of the pouch beyond the fold is removed to form a dispensing opening, the twin-Z fold serves as the reclosable valve partially unfolding and permitting passage of the liquid from the pouch through the dispensing opening when the pouch is subjected to a squeezing force and refolding to prevent passage of the liquid from the pouch through the dispensing opening upon release of the squeezing force.

REFERENCES:
patent: 3430842 (1969-03-01), Yamaguchi
patent: 3815810 (1974-06-01), Wellman

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