Baxter Travenol Laboratories, Inc.

Philip G Ralston

Joe A Miller

Frank Cammarata, Iii

A flexible, collapsible container having walls essentially 0.01 to 0.03 inch thick and defining relatively thin lines of folding weakness in the container to facilitate flat collapse. The thickness of the lines of folding weakness is less than that of the surrounding walls. The cross-sections of the lines of folding weakness define arcs, the outer surfaces of which have a circumferential length which is 40 to 60 percent greater than the direct width of the lines of folding weakness. Preferably, the container is made of a relatively stiff polyolefin plastic such as polyethylene, polypropylene, or copolymers thereof of similar stiffness, particularly biaxially oriented materials.

Flexible collapsible container

A flexible-walled, tubular, collapsible container for liquids is disclosed of the type having a head portion with access means, and a tail portion with a sealed line joining sides of the container into a sealed end. In accordance with this invention, the sealed line occupies a recess defined in the sealed end by the flexible container walls. As a result of this, outwardly directed shock, created for example when the filled container is dropped, is absorbed by the walls of the recess, to protect the sealed line from rupture. Accordingly, the sealed end of the container of this invention exhibits increased strength and rupture resistance.

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Woodstock, IL, United States of America

Philip G Ralston