Dual-chamber container, and method and apparatus for its manufacture
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United States of America Patent
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Aug 5, 2003
Grant Date -
N/A
app pub date -
Sep 24, 2001
filing date -
Sep 24, 2001
priority date (Note) -
Expired
status (Latency Note)
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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.
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