Measuring and testing – With fluid pressure – Leakage
Patent
1985-12-20
1987-05-12
Levy, Stewart J.
Measuring and testing
With fluid pressure
Leakage
G01M 326
Patent
active
046639640
ABSTRACT:
Disclosed herein is an apparatus and method for testing the integrity of a package having a flexible surface. The apparatus includes a chamber which can be sealed whereby it may be pressurized or a vacuum may be drawn. Inside the chamber is a transducer sensitive to the flexible surface of the package to be tested. Positioning of the transducer against the package to be tested is done automatically by a device which is computer controlled. The sequence of testing is also computer controlled whereby the chamber is sealed with the package in it, the probe is automatically adjusted to contact the flexible surface, the pressure of vacuum is applied to the chamber in order to test the integrity and thereafter the condition of the package is analyzed and recorded by a computer which receives the signal generated from the measuring transducers. The information is analyzed by the computer and a decision made regarding the airtightness of the package using either linear regression analysis or peak detection. Any change in the flexible surface of the package is monitored and considered throughout the test sequence. The information derived from the transducers is recorded on, for example, a strip chart or a CRT and thereafter the pressure or vacuum in the chamber is released whereby the package can be removed and contents replaced therein for testing.
REFERENCES:
patent: 3117441 (1964-01-01), Zimmermann
patent: 3343404 (1967-09-01), La Rosa et al.
patent: 3837215 (1974-09-01), Massage
patent: 3991622 (1976-11-01), Oowada
patent: 3998091 (1976-12-01), Paquett et al.
patent: 4326408 (1982-04-01), Kanoh
Jeanette Henry C.
Levy Stewart J.
Nath Gary M.
Roskos Joseph W.
Scola, Jr. Daniel A.
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