Measuring and testing – Testing sealed receptacle
Patent
1979-12-10
1981-12-22
Goldberg, Gerald
Measuring and testing
Testing sealed receptacle
33172R, 209529, 209597, G01M 300, G01B 502
Patent
active
043064485
ABSTRACT:
A method, apparatus and system for testing 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 sealing element over the discharge opening in the container. The invention consists in measuring the change in thickness of the resilient sealing element resulting from compression of the sealing element on the container and comparing the change in thickness or a value determined therefrom to a predetermined standard known to indicate sufficient compression to provide an acceptable seal. Resilient sealing element thickness is measured by apparatus including a sensing head having an anvil engageable with the closure mounted on an actuator member of a dial indicator. A face of the anvil engages the top of the cap along a circular line adjacent of the corner radius at its juncture to the top of the cap. With the indicator in a set, fixed position, the height of the container closure assembly can be measured and the change in thickness of the sealing element determined by simply noting the difference in the pre- and post- sealing position of the dial indicator.
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
Goldberg Gerald
Renz Jr. Eugene E.
Roskos Joseph W.
The West Company
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