One-way package for fluids and apparatus for the extraction of fluids from this package

Abstract From the Canadian patent

A flat, rectangular box made of cardboard contains a bag of multilayered foil material. A tube, which is disposed in the inside of the box when the package is in the transport condition and can be removed from this through an opening which is closed by a tear-off strip is, connected in a fluid-tight manner with the bag by a connecting piece. An outlet provided at the free end of the tube is controlled by a pressure relief valve provided in the tube and which opens in the direction of the outlet. The walls of the narrow sides of the box each have a longitudinal fold along which these walls can fold outward when the broad sides of the box are pressed together in order to empty the bag which …