Vacuum package tester and method

Details Vacuum package tester and method Vacuum package tester and method

1982-11-10

1984-10-23

Swisher, S. Clement

Measuring and testing

With fluid pressure

Leakage

G01M 334

Patent

active

044780702

ABSTRACT:
A vacuum package tester is capable of providing data by which the internal pressure and volume of residual gas of a flexible wall vacuum package exposed to atmospheric pressure may be calculated. A container partially filled with liquid is surrounded by a deformation-absorbing enclosure. A vacuum pump reduces the pressure in the head space above the liquid, thereby causing a submerged package to expand. Pressure gauges record the respective pressures in the head space when the package expands by first and second known volumes. From this data, the internal pressure and volume of residual gas of said package, when exposed to ambient pressure and temperature, may be calculated. In use, the invention also performs an improved method.

REFERENCES:
patent: 3646804 (1972-03-01), Myers
patent: 4259975 (1981-04-01), Kinsey, Jr. et al.
Lampi, Flexible Packages for Thermoprocessed Food, 1977.
Rizvi, Retortable Pouches, Summer, 1980.
Shappee and Werkowski, Non-Distructive Test for Determining the Volume of Air in Flexible Food Package, 6/72.
Ghosh and Rizvi, Non-Distructive Determination of Residual Volume of Air in Retort Pouches.

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