Method and apparatus for determinating a vacuum degree within a

Details Method and apparatus for determinating a vacuum degree within a Method and apparatus for determinating a vacuum degree within a

1985-10-29

1987-12-01

Levy, Stewart J.

Measuring and testing

With fluid pressure

Leakage

73 52, G01M 336

Patent

active

047095784

ABSTRACT:
Method and apparatus for determining a vacuum degree of a flexible vacuum package. The vacuum package is sealingly placed within a vacuum chamber and then the vacuum chamber is evacuated to a vacuum degree below the vacuum degree of the vacuum package placed within the vacuum chamber. A start of inflation of the package is detected during the evacuation step and pressure within the vacuum chamber is measured when the start of the inflation of the package is detected.

REFERENCES:
patent: 1974026 (1934-09-01), Hicks
patent: 2648977 (1953-08-01), Mills
patent: 3117441 (1964-01-01), Zimmerman
patent: 3667281 (1972-06-01), Pfeifer
patent: 3859844 (1975-01-01), Hruby
patent: 4188819 (1980-02-01), Egee et al.
patent: 4478070 (1984-10-01), Clifford et al.

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