A pressurization pouch having a pressurization system therein activated by the application of a vacuum underpressure to the outside surfaces of the pouch is inserted into a dispensing container through an opening in a lid portion of the container. Upon the sealing of the container by the attachment of...http://www.google.com.au/patents/US4896794?utm_source=gb-gplus-sharePatent US4896794 - Method for prepressurizing dispensing container and for filling pressurized container with flowable product
