Measuring and testing – With fluid pressure – Leakage
Patent
1993-11-18
1996-03-12
Williams, Hezron E.
Measuring and testing
With fluid pressure
Leakage
73 52, G01M 332
Patent
active
054976545
ABSTRACT:
A method and test chamber for leak testing a container with substantially flexible side wall wherein the container is introduced into a test cavity so that the flexible side wall of the container is spaced from at least first, relatively recessed portions of an inner adjacent wall of the test cavity with a gap being defined between at least the first, relatively recessed portions of the inner wall of the test cavity and the flexible side wall of the container. A pressure difference is installed as an initial value between the interior of the container and at least the gap by applying a pressure at least to the gap which is smaller than a pressure inside the container. The flexible side wall is supported from its exterior side within the test cavity on second, relatively raised portions of the adjacent inner wall of the test cavity so as to mechanically stabilize the flexible side wall with respect to the outward bending as a result of the pressure difference. The time course of a pressure prevailing within the gap is measured as a leak indicative signal. The volume of the container can be reduced during testing by mechanically biasing the container from the outside to receive the pressure inside the container during testing and to additional stress selected areas of the container.
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Wiggins J. David
Williams Hezron E.
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