Inspection head

Details Inspection head Inspection head

1975-07-11

1976-12-07

Woodiel, Donald O.

Measuring and testing

With fluid pressure

Leakage

73 94, G01M 326

Patent

active

039954730

ABSTRACT:
An inspection head to test objects such as plastic bottles for absence of leaks and crushing resistance includes a column having a seal for an aperture in the object which may be applied to the object to exert a crushing force and a fluid supply source to apply a pressure inside the object, which pressure is compared with a reference pressure by means of a movable diaphragm. When the object has an adequate resistance to crushing so that the column does not move beyond a certain point, and the object is free from leaks so that the difference in pressure does not exceed a given value, apertures in sliding members movable according to the positions of the diaphragm and column are in alignment, which fact may be checked by passing a light beam through the apertures. When the apertures are not in alignment the object may be rejected. The head may be used for continuous in-line inspection of objects which are produced successively.

REFERENCES:
patent: 3771649 (1973-11-01), Strauss
patent: 3805594 (1974-04-01), Hayashi
patent: 3832892 (1974-09-01), Bohl

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