Methods for manufacturing unleaky closed containers and leak testing apparatus
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United States of America Patent
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Sep 8, 2009
Grant Date -
Apr 24, 2008
app pub date -
Dec 19, 2007
filing date -
Sep 9, 2005
priority date (Note) -
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Abstract
In a leak testing apparatus and a method for manufacturing unleaky closed containers having first and second flexible wall areas with different flexibility characteristics, a biasing member is moved toward and onto the first flexible area and a force detector monitors a biasing force at the second flexible area. A container is considered unleaky if a difference signal from force measuring signals at first and second points in time fulfills a test criteria. Sampling the biasing force monitored which results in the first force measuring signal includes determining maximum biasing force signal value which occurs during a time span up to and including the first point in time.
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