Packing container for pressurized contents and a method for manufacturing the same

Abstract From the Canadian patent

Packing containers in cushion-form that is to, say packing containers which comprise a liquid-tight tube which is sealed together at both ends in transverse sealing fins, cannot be used for pressurized contents since the, flexible plastic material of which the containers are made cannot be joined with sufficient strength in the sealing fins. In accordance with the invention the packing containers, and in particular their sealing fins are strengthened by means of an external strengthening band which joins the sealing fins situated at both ends of the container. At the same time the fins are held folded down against the outside of the container so that the internal pressure in the container …