METHOD OF TREATING A HOT FILLED PLASTIC THIN WALLED CONTAINER AND ASSOCIATED DEVICE
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United States of America Patent
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Issued Date -
Apr 26, 2012
app pub date -
Jul 29, 2009
filing date -
Jul 29, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A process for treatment of a thin-walled plastic container, the container having residual stresses resulting from its manufacture from a preform, which has been hot-filled and stoppered with liquid contents and then cooled once filled and stoppered, and being designed to undergo stress relief by a heat treatment, characterized in that it includes a stage prior to that of the heat treatment that consists in exerting mechanical force on the external surface of the thin wall of the container that is deformed by the hot filling to generate an interior pressure so as to compensate for at least the underpressure to which it is subjected and to restore its initial shape to it. An associated device for the implementation of the process is also described.
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