Measuring and testing – With fluid pressure – Leakage
Patent
1989-02-09
1990-08-28
Chapman, John
Measuring and testing
With fluid pressure
Leakage
G01M 332
Patent
active
049514962
ABSTRACT:
A method of, and apparatus for, leak testing a package, in which the package is placed in a sheet-like, gas-tight envelope. A pressure differential is generated between the outside and the inside of the envelope, as a result of which the package is closely enveloped by the envelope. This pressure differential is so large that it decreases the volume of the package and increases the internal pressure in a non-filled portion thereof. In a sealed measuring space defined between the package and the envelope pressed against it, a pressure is used which is lower than the increased pressure in the package. In the sealed measuring space, the pressure is measured for a pre-determined measuring period. An increase in pressure in the measuring space indicates leakage from the package.
REFERENCES:
patent: 3027753 (1962-04-01), Harder, Jr.
patent: 3805595 (1974-04-01), Dobry
patent: 4055984 (1977-11-01), Marx
patent: 4593554 (1986-06-01), Aarts
patent: 4689987 (1987-09-01), Aarts
Chapman John
Product Suppliers AG
Roskos Joseph W.
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