Container comprising an inner pouch
AssigneeGaplast GmbH
InventorRoland Kneer
Life of this patent
Estimating the term…
Abstract
A container comprises a substantially dimensionally stable outer wall and an easily deformable inner pouch which gradually contracts upon discharge of the contents of the container. As a result, pressure compensation is provided in the increasing space between the outer wall and the inner pouch. The outer wall and the inner pouch have, therebetween, a layer of a pressure compensating material that expands when acted upon by an agent. The expanding layer comprises, in an exemplary embodiment, citric acid and sodium bicarbonate foam acting against the inner pouch. The foamed pressure-compensating layer supports the inner pouch so that no vacuum is generated in the pouch.
Claims8
A container comprising a substantially dimensionally stable outer wall and an easily deformable inner pouch, including an expandable material which, upon action of an agent gradually passes into a foam-like or gaseous state and fills the space created between said inner pouch and said outer wall upon discharge of filing material from said inner pouch, characterized in that said expandable material (2) is arranged between said outer wall (1) and said inner pouch (3), and that said agent passes through the wall of said inner pouch or the dimensionally stable outer wall to said expandable material (2);
- and wherein said filing material is not mixed with said expandable material.
Dependencies are inferred from the claim text.