Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Including application of internal fluid pressure to hollow...
Reexamination Certificate
2006-09-06
2009-02-03
McDowell, Suzanne E. (Department: 1791)
Plastic and nonmetallic article shaping or treating: processes
Direct application of fluid pressure differential to...
Including application of internal fluid pressure to hollow...
C264S534000, C264S537000, C264S900000, C264S234000, C264S237000, C264S345000, C264S348000, C425S324100, C425S384000
Reexamination Certificate
active
07485252
ABSTRACT:
Apparatus and method for making a molded plastic article having a stretched and crystallized neck finish. In one embodiment, a series of platforms are carried by a conveying apparatus for transporting a series of molded plastic articles along a predetermined path of travel through one or more treatment stations. At a finish widening station, the molded article, having a relatively wide and thin-walled blow-molded body portion, and a relatively narrow and thick-walled unexpanded neck finish portion, is positioned to enable insertion of a mandrel into an open top aperture of the finish portion to widen the finish. The mandrel may include a lower heated tapered portion for expanding the finish, and an upper cooled body portion on which the expanded finish may be cooled. The article may then be sent to a finish crystallizing station having a heating device that heats the widened finish portion for a time and temperature selected to crystallize at least a portion of the widened finish. A sizing mechanism positionable in the widened finish supports the finish during crystallization.
REFERENCES:
patent: 4781954 (1988-11-01), Krishnakumar
patent: 6099766 (2000-08-01), Aoki et al.
patent: 6572812 (2003-06-01), Collette et al.
patent: 6884382 (2005-04-01), Lynch et al.
patent: 2005/0003123 (2005-01-01), Nahill
patent: 2005/0236356 (2005-10-01), Lonsway
Barker Keith
Lynch Brian
Nahill Thomas E.
Graham Packaging Company LP
McDowell Suzanne E.
Rissman Jobse Hendricks & Oliverio LLP
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