Apparatus for detecting internal pressure of a can

Measuring and testing – Testing sealed receptacle

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73 41, G01M 336

Patent

active

048980234

ABSTRACT:
An apparatus for detecting internal pressure of a can has a reaction detector comprising two sets of fixed members and load cells arranged slightly narrower than the outside diameter of a can body and in a slightly different spaced apart from each other and a buckling detection sensor for detecting a displacement of the center of a cover. The reaction detector and the buckling detection sensor are mounted on a frame adjustable in position according to the kind of cans to be tested. The can is made to pass between two fixed members and load cells while being held by side retaining belts provided along the conveyor while being prevented from rotation. The same part of a can body is forced with different amounts of force and the reaction at that time is measured and converted into internal pressure of the can. The internal pressure of a can is thus measured accurately by this apparatus even if there are deviations in the roundness of the can body. The cover buckling detection sensor detects a can having an excessively high internal pressure which gives rise to buckling.

REFERENCES:
patent: 2407062 (1946-09-01), Darrah
patent: 4024956 (1977-05-01), Cassidy
patent: 4117718 (1978-10-01), Hayward

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