Patent ID: 7033656
Filing Date: 2006-04-25
Classification: B29B,B29C,B29K,B29L,B65D,Y10T

Abstract:
1. A preform for blow molding a hollow plastic container, said preform being at least partially of crystallizable polymer construction and including: a neck finish and a body integral with said neck finish, said neck finish having an end portion remote from said body, a capping flange adjacent to said body, and a mid portion between said end portion and said capping flange, said end and mid portions forming a continuous outer surface and a continuous inner surface, one of said inner and outer surfaces being crystallized throughout its length and the other of said inner and outer surfaces including at least a portion that is essentially uncrystallized, crystallization in at least said mid portion of said neck finish being graded between said crystallized surface and the uncrystallized portion of the other surface, said body and said neck finish below said capping flange being essentially free of crystallization.