B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/540
B29C 49/64 (2006.01) B29C 35/08 (2006.01) B29C 35/12 (2006.01)
Patent
CA 1268309
ABSTRACT OF THE DISCLOSURE A hybrid reheating of polyester preforms which are to be stretch blown into containers wherein the reheating coupled with the controlled quick initiation of the blow stretch operation after final reheating produces a container which may be filled with a hot fill without there being any disadvantageous shrinkage of the container. The reheating is by way of a specific combination of quartz oven reheating and radio frequency reheating together with specific equilibrations of the temperature cross sectionally of the preform body. Polyester preforms may be reheated to a cross sectional center temperature ranging from 225°F to 260° F and stretch blow molded without undesirable surface crystallization occurring while the ability of the container to be filled with a hot fill substantially without shrinkage is increased.
539887
Collette Wayne N.
Continental Pet Technologies Inc.
Swabey Ogilvy Renault
LandOfFree
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