Pressurized dispenser with propellant bag

Claim 1

THE PROCESS FOR SIMULTANEOUSLY CHARGING PROPELLANT TO A PRODUCT COMPARTMENT AND TO A PROPELLANT COMPARTMENT OF A PACKAGE FOR DISPENSING FLUENT PRODUCT IN AN EXPANDED STATE, COMPRISING CHARGING PROPELLANT AT GREATER THAN ATMOSPHERIC PRESSURE TO SAID PRODUCT COMPARTMENT OF SAID PACKAGE THROUGH A VALVE THEREOF EQUIPPED WITH INLET MEANS TO SAID PRODUCT COMPARTMENT AND WITH INLET MEANS TO A FLEXIBLE BAG COMPRISING SAID PROPELLANT COMPARTMENT, SAID LATTER INLET MEANS CONTAINING A CHECK VALVE WHICH ADMITS PROPELLANT TO SAID BAG DURING SAID CHARGING OPERATION AND WHICH PREVENTS PROPELLANT FROM FLOWING THEREFROM, UNTIL SAID PROPELLANT COMPARTMENT IS SUBSTANTIALLY CHARGED WITH PROPELLANT AND CHARGING PROPELLANT TO SAID FLEXIBLE BAG AT A PRESSURE GREATER THAN THE PRESSURE AT WHICH SAID PRODUCT COMPARTMENT WAS CHARGED AND SUFFICIENT TO ACTUATE SAID CHECK VALVE TO ADMIT PROPELLANT TO SAID BAG UNTIL SAID BAG IS SUBSTANTIALLY CHARGED WITH PROPELLANT.