Package making – Methods – Filling preformed receptacle and closing
Reexamination Certificate
2006-06-21
2010-06-15
Truong, Thanh K (Department: 3721)
Package making
Methods
Filling preformed receptacle and closing
C053S048200, C053S127000, C053S440000, C426S401000
Reexamination Certificate
active
07735300
ABSTRACT:
A process for hot filling a container with a sterilized liquid, generally at a temperature that is between 60 to 95° C. An embodiment of the process includes (a) providing a container that is made of a polymer and following a process that can make it able to withstand the hot filling of said liquid; (b) filling the container with said hot liquid; (c) closing the filled container immediately after filling; (d) allowing the container to cool at least below a transition temperature that is on the order of from 40° C. to 50° C. and forming a depression inside the container, resulting in visible deformation; and (e) heating the container to bring about a relief of the residual stresses, whereby this relief leads to a shrinkage and consecutively generates an internal pressurization that compensates for at least the deformation undergone by the effects of the depression of stage (d).
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International Search Report of PCT/FR2006/001408 filed Jun. 21, 2006, date of mailing Nov. 11, 2006.
Plastipak Packaging, Inc.
Tabone Mario A.
Tecsor HR
Truong Thanh K
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