Vacuum valve for an I.S. machine
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United States of America Patent
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Jan 12, 2010
Grant Date -
Sep 20, 2007
app pub date -
Mar 17, 2006
filing date -
Mar 17, 2006
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A vacuum valve for use with a blow mold in an I.S. machine. When the blow molds close around a parison, vacuum is applied to the wall of the blow mold. At some time following the application of the vacuum, final blow will occur blowing the parison into a bottle. This vacuum will be applied until the parison has been blown into a bottle. During the period during which vacuum is applied but final blow has not started, vacuum is reduced by operating a needle valve in the vacuum line.
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