Dual-chamber container, and method and apparatus for its manufacture
AssigneeGraham Packaging Company, L.P.
InventorsRichard R. Johnston, Michael Hsieh
Life of this patent
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Abstract
A method of fabricating a dual-chamber plastic container in an injection/extrusion/blow-molding operation, in which a container finish is first injection molded. The finish mold tooling is then moved axially upwardly as plastic continues to be extruded through extrusion tooling in which an orifice bushing surrounds a mandrel tip. The mandrel tip has a passage through which plastic is extruded to form a wall that divides the extruded tube into separate chambers. Blow molds are brought in from both sides to capture the extruded tube, and air is blown through a passage in the finish mold tooling to blow the tube chambers to the confines of the mold.
Claims1
A one-piece dual-chamber plastic container that includes:
- a hollow body having a peripheral sidewall, a closed bottom, and a dividing wall extruding laterally across and longitudinally through said body dividing said body into dual chambers, and
- a finish integrally molded to said body having a pair of spaced outlet openings in registry with said chambers,
- said dividing wall being planar in the container as molded and sufficiently thin to flex for self-leveling of fluids between said chambers.
Dependencies are inferred from the claim text.