Measuring and testing – With fluid pressure – Leakage
Patent
1995-01-31
1996-07-16
Noland, Thomas P.
Measuring and testing
With fluid pressure
Leakage
73 40, 73 492R, 73 45, 324693, A61B 1900, G01M 316
Patent
active
055356184
ABSTRACT:
The present invention relates to a method for testing for leaks in the bodies of sealed containers. The method comprises first placing a hole into the body of a sealed container, and then: (a) inserting a first electrode into a sealed container containing an electrolyte product composition, wherein the first electrode is inserted into the sealed container in a manner such that it is at least partially immersed in the electrolyte product composition; (b) immersing the sealed container into an electrolyte bath solution contained in a vessel, wherein the electrolyte bath solution is in direct contact with a second electrode, and wherein the sealed container is immersed into the electrolyte bath solution in a manner such that the seal of the sealed container is completely immersed in the electrolyte bath solution, the interior seal surface of the sealed container is completely submerged in the electrolyte product composition contained in the sealed container, and the first electrode is not in direct contact with the electrolyte bath solution; (c) connecting the first electrode and the second electrode to either a source of direct electric current or a conductivity measuring device; and (d) measuring the electric current flow or conductivity from one electrode to the other; wherein the sealed container is not leaking if there is no electric current flowing or electrical conductivity between the two electrodes, and the sealed container is leaking if there is electric current flowing or electrical conductivity between the two electrodes. The present invention further relates to an apparatus capable of detecting seal leaks in this manner.
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"Emphasis on Networking for Added Security," Packaging News, Jan. 1994, pp. 24-25.
"The Status of Leak Detection", R. Kelsey, Food Drug Packaging, vol. 54, No. 11, Nov. 1990, pp. 8, 10-11, 18, 21.
Johnson Lars S.
Matthews Mart C.
Noland Thomas P.
The Quaker Oats Company
Wiggins J. David
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