Apparatus, method and system for determining the integrity of se

Details Apparatus, method and system for determining the integrity of se Apparatus, method and system for determining the integrity of se

1980-05-12

1982-02-16

Howell, Kyle L.

Measuring and testing

Testing sealed receptacle

73 493, 209529, G01M 302

Patent

active

043154271

ABSTRACT:
A method, apparatus and system for determining the integrity of a container sealed by means of a closure comprising a resilient sealing element and a cup-like cap having a top and a depending skirt compressing the resilient sealing element over the discharge opening in the container. The invention consists of verifying seal integrity by applying an external force to the cap and measuring the force required to effect initial movement thereof to overcome the residual static force in the resilient sealing element and by comparing the measured force which is essentially equal to the residual static force in the resilient sealing element to a predetermined standard known to provide an acceptable seal. It is known that when the force between the crimped edge of the cap and the container is zero which occurs upon initial displacement of the cap relative to the container, the externally applied force is essentially equal to the residual static force in the resilient sealing element. The residual static force in the resilient sealing element is measured by apparatus including a mechanical force applicator unit having an anvil engageable with the cap mounted on an actuator member of a gauge for measuring the applied force and a microscope, for observing initial downward displacement of the cap when a given external force essentially equal to the residual static force in the resilient sealing element is applied.

REFERENCES:
patent: 2512134 (1950-06-01), Baule
patent: 3371781 (1968-03-01), Armbruster et al.
patent: 3416360 (1968-12-01), Ochs
patent: 3586165 (1971-06-01), Keinanen
patent: 3633742 (1972-01-01), Melton

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