Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1982-11-19
1985-02-05
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
356240, G01N 2190
Patent
active
044980035
ABSTRACT:
In a device for testing the rim around the apertures of bottles for flaws there is a rotor which has an optic fiber bundle for transmitting light to the rim or sealing surface of the bottle and another fiberoptic bundle for receiving light reflected or scattered by the surface that is to be sealed with a crown cap. The optical axes of the light transmitter and receiver are arranged in a common scanning plane which is substantially perpendicular to the plane of the aperture or rim and intersects the plane tangentially to the sealing surface. The optical axes are inclined by an acute angle, alpha, with respect to the plane of the aperture or rim. The light transmitter and receiver optical bundles have lenses at their ends for, respectively, projecting a light beam through the aperture plane and for receiving light reflected or scattered therefrom. One end of the light conductor or transmitter is coupled to a light source. One end of the light receiver is coupled to a photosensitive device. The bottles are rotated at high speed during a scanning and testing cycle. If a flaw is present, the light reflected from the rim of the aperture drops below a threshold level. This event results in producing electric signals that operate an ejection device for removing the bottle from the series of bottles that are being inspected.
REFERENCES:
patent: 3533704 (1970-10-01), Krenmayr
patent: 4213702 (1980-07-01), Bryant et al.
patent: 4284353 (1981-08-01), Yoshida et al.
patent: 4293219 (1981-10-01), Ducloux
Brophy J. J.
Krones A.G. Hermann Kronseder Maschinenfabrik
Nelms David C.
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