Method and apparatus for automatically detecting the presence of

Details Method and apparatus for automatically detecting the presence of Method and apparatus for automatically detecting the presence of

1984-12-26

1990-09-11

Williams, Hezron E.

Measuring and testing

With fluid pressure

Leakage

73 52, G01M 336

Patent

active

049552260

ABSTRACT:
A method and apparatus can automatically detect the presence of leaks in sealed plastic bags filled with product and gas by detecting the amount of displacement and the variation in displacement over time of a displacement transducer movable into contact with a fluffed bag, and utilizing the variation of displacement over time to detect such leaks. The variation of displacement over time is compared to the variation (or lack thereof) observed in a control bag without appreciable leaks, and a sufficient difference therebetween indicates a bag with a leak, which is thereafter rejected.

REFERENCES:
patent: 3751972 (1973-08-01), Hass
patent: 3805595 (1974-04-01), Dobry
patent: 3918293 (1975-11-01), Feigel
patent: 3998091 (1976-12-01), Paquette et al.
patent: 4024956 (1977-05-01), Cassidy
patent: 4148213 (1979-04-01), Prakken
patent: 4517827 (1985-05-01), Topscott

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