Apparatus for Shell Freezing a Liquid Content in a Container
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United States of America Patent
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N/A
Issued Date -
Aug 21, 2008
app pub date -
May 9, 2005
filing date -
May 10, 2004
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
An apparatus for shell freezing a liquid content in a container, comprising an endless loop conveyor having a conveying length adapted to convey plural containers such as pharmaceutical vials, incorporating plural rollers to spin the containers as they are conveyed by the conveyor, and a return length, along at least part of the return length the rollers are immersed in a cooling liquid at a temperature below the freezing point of the liquid content of the containers, and along the conveying length the rollers are entirely above the surface of the cooling liquid. A preferred cooling liquid is liquid nitrogen, the evaporating vapour of which can be used to shield vials on the conveying length.
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