Lightweight preform and method of manufacture

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

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Details

C264S523000, C264S537000, C428S035700, C428S036920, C215S040000, C215S042000, C215S044000

Reexamination Certificate

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07976767

ABSTRACT:
A preform for use in blow molding a plastic container is disclosed herein. The preform has an open end and closed end, and a body adapted to form a body of the container when the container is blow molded. The preform further includes a finish having a top surface, an inner wall having circumferentially-spaced thin segments alternating with thick segments, and an outer wall wherein the thin segments exist entirely in the finish and extend towards the open end of the body of the preform. The thick segments do not extend to the top surface.

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patent: 4649068 (1987-03-01), Collette
patent: 5366774 (1994-11-01), Pinto et al.
patent: 5756172 (1998-05-01), Semersky
patent: 6648157 (2003-11-01), Shai et al.
patent: 6974047 (2005-12-01), Kelley et al.
patent: 2003/0168374 (2003-09-01), O'Neill
patent: 2005/0158495 (2005-07-01), Nahill
patent: 11208630 (1999-08-01), None
Kapolas, W., “Voluntary Standard CSD Finish PCO-1810”, Closure Manufacturers Association, 2003, https://secure.closuremanufacturers.org/files/specifications/58/PCO-1810.pdf (registration required)).

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