Method and apparatus for testing the fluid-tight sealed integrit

Details Method and apparatus for testing the fluid-tight sealed integrit Method and apparatus for testing the fluid-tight sealed integrit

1986-10-02

1987-12-29

Levy, Stewart J.

Measuring and testing

With fluid pressure

Leakage

73 454, G01M 302

Patent

active

047152150

ABSTRACT:
A leak detector is adapted to test the fluid-tight sealed integrity of a hermetically-sealed package having a movable wall portion. An enclosure surrounds a package-to-be-tested, and the space within the enclosure is evacuated by a vacuum pump. As the pressure acting on the outer surface of the package begins to fall,the gas within the package will be expand, pushing the movable wall portion outwardly. Such displacement of the movable wall portion is sensed and compared with a predetermined value. If desired, the reduced pressure within the enclosure may be held constant for as time interval, and the sensor used to determine whether the distended wall portion has relaxed.

REFERENCES:
patent: 3117441 (1964-01-01), Zimmerman
patent: 3751972 (1973-08-01), Hass
patent: 3837215 (1974-09-01), Massage
patent: 3918293 (1975-11-01), Feigel
patent: 4517827 (1985-05-01), Tapscott
patent: 4663964 (1987-05-01), Croce

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