Measuring and testing – With fluid pressure – Leakage
Patent
1992-05-15
1993-11-09
Williams, Hezron E.
Measuring and testing
With fluid pressure
Leakage
73 52, G01M 336
Patent
active
052592375
ABSTRACT:
Method and apparatus for leak-testing a filled and closed flexible package, in which the package is placed on a vertically movable support member and is compressed between the support member and a pressure member bearing on the top of the package as a result of relative movement of these members towards each other. The change in the pressure is measured for a fixed measuring time and from this the presence or absence of a leak is determined.
The support member supports the package, substantially completely filled with a liquid product, by means of springs. The package is compressed by lowering the pressure member onto the package, the support member thereby being pressed downwards against the spring force acting on the support member.
For a fixed measuring time, the change in the spring force is measured for determining possible leakage of liquid from the compressed package.
REFERENCES:
patent: 3805595 (1974-04-01), Dobry
patent: 4517827 (1985-05-01), Tapscott
patent: 4697452 (1987-10-01), Prakken
patent: 4706494 (1987-11-01), Creed et al.
patent: 4955226 (1990-09-01), Beaty et al.
Roskos Joseph W.
Sara Lee / DE N.V.
Williams Hezron E.
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