Improvements introduced in a container inserted into a container to develop pressure in order to distribute the contents of the container.

摘要

A closed receptacle for pressurizing the contents of dispensing or delivery containers. The receptacle contains chemical products which react in order to develop a gas pressure for expanding the receptacle when it is in the delivery container. A series of sequentially breakable cavities add additional increments of internal pressure as dispensing or delivery proceeds. These cavities, and additional cavities which contain chemical products for initiating pressurization of the receptacle, are formed in an outer film welded or closed by heat onto a second outer film for defining the receptacle. The breakable cavities are covered with a tape for keeping the chemical products isolated until breakage takes place by progressive separation of the tape as the receptacle expands.