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PACKAGE FOR STORING AND DISPENSING LIQUIDS

  • US 3,838,794 A
  • Filed: 07/10/1972
  • Issued: 10/01/1974
  • Est. Priority Date: 07/10/1972
  • Status: Expired due to Term
First Claim
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1. A package for storing and dispensing liquids comprising:

  • a closed flexible container for containing a liquid initially to be stored and later to be dispensed, said container comprising a pair of flat sheet-like flexible and inelastic container sidewall members which face each other and are joined together at their peripheries to form a liquid-tight construction in such manner that, when the container is empty, the inside surfaces of the container sidewall members can substantially abut one another, and when liquid is placed in the container, they move apart to receive liquid between them; and

    a vessel comprising a pair of flat sheet-like flexible and inelastic vessel sidewall members which face each other and are joined together at their peripheries to form a fluid-tight closed bounding wall member enclosing said container, all of the sidewall members being able to lie in a substantially flat stack in substantial contiguity with any abutting sidewall member when the container and vessel are empty, the vessel sidewall members being so proportioned relative to the container sidewall members that a region can be formed between them when both are distended by fluid, such that the container'"'"''"'"'s enlargement is not prevented by the vessel, and as liquid is withdrawn from the container, the vessel does not interfere with the return of the container sidewall members to mutual surface-to-surface abutment;

    there being an outlet port from the outside of the vessel to the inside of the container, both of said container sidewall members being substantially fully exposed to pressure in the region which is formed between the vessel and the container, the container sidewall members being substantially unattached to the inside of the vessel sidewall members, there being a port providing for entry of fluid under pressure into said region between the container and the vessel.

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