System for checking seals in a packaging plant

Details System for checking seals in a packaging plant System for checking seals in a packaging plant

1988-05-06

1990-06-05

Williams, Hezron E.

Measuring and testing

With fluid pressure

Leakage

73 493, G01M 336

Patent

active

049303457

ABSTRACT:
The seal of a package comprising a cup containing a liquid or semiliquid substance and having a rim to which a flexible cover is sealed is checked by simultaneously monitoring the position of the cover, inwardly elastically deflecting at least one of the walls of the cup so that the disk is bulged outward only when the cup is sealed, and generating an output based on the monitored position of the disk when the disk is bulged outward. The cup is held substantially stationary while monitoring the cover-disk position and inwardly deflecting the one wall, although normally diametrically opposite side walls are simultaneously and oppositely inwardly deflected. The position of the cover disk is monitored by pressing a bumper against it resiliently and detecting movement of the bumper.

REFERENCES:
patent: 3261465 (1966-07-01), Haller
patent: 3847014 (1974-11-01), Mistarz
patent: 4024956 (1977-05-01), Cassidy
patent: 4706494 (1987-11-01), Creed et al.
patent: 4730482 (1988-03-01), Cerny et al.
patent: 4747299 (1988-05-01), Fox et al.

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