Measuring and testing – With fluid pressure – Leakage
Reexamination Certificate
2007-07-26
2008-11-25
Rogers, David A. (Department: 2856)
Measuring and testing
With fluid pressure
Leakage
C073S040000, C073S049200, C073S052000, C073S865800
Reexamination Certificate
active
07454957
ABSTRACT:
For leak testing closed containers (9) which are filled with a filling product containing at least one liquid component the container is introduced in a test cavity (1) which is evacuated at least down to vapour pressure of that liquid component. The pressure in the surrounding of the container (9) and thus within test cavity (1) is monitored. Monitoring is performed by a vacuum pressure sensor (7), whereas lowering pressure surrounding the container (9) is performed by a vacuum pump (5). Leakage is detected by monitoring a pressure change in the surrounding of the container which is due to evaporation of liquid emerging from a leak and being evaporated in the low pressure surrounding.
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Antonelli, Terry Stout & Kraus, LLP.
Rogers David A.
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