Method for effective de-oxygenation of product containers for use as containers for oxygen sensitive products
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United States of America Patent
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Issued Date -
Jun 21, 2012
app pub date -
Dec 20, 2010
filing date -
Dec 20, 2010
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Abandoned
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Abstract
The invention generally relates to the use of liquid nitrogen to displace air, or other water and/or oxygen containing atmospheres, from containers prior to filling with a highly sensitive product. The process in general has two steps: a) depositing a volume of liquid nitrogen into the cavity of an empty container and b) applying a vacuum to the cavity of the container. The vacuum will accelerate vaporization and thereby shorten the liquid nitrogen vaporization time frame. This procedure results in a highly effective one step de-oxygenation and/or de-humidification of the container cavity. Further, the evacuation ensures complete liquid nitrogen vaporization prior to product filling.
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