Importance

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Abstract

A reusable bi-directional, fluid-tight, vertical sealing device for closing, sealing, and permitting re-opening of, flexible bags, with two sealing strips arranged to be interlocked and uninterlocked by a slider which has internal means such as rails acting upon the sealing strips so as to move them into a vertically interlocked fluid-tight sealing contact capable of holding a vacuum without leakage and of resisting pressure differences in either direction across the seal, so that the efficacy of the seal is improved by increases in the pressure differential. The word 'fluid', is used in its usual meaning of liquid or gas or a mixture of both, and, in addition, powder, and 'vertical', herein means in the plane of interior contact of the sheets of the bag when empty and hanging vertically.

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First Claim