G - Physics – 01 – N
Patent
G - Physics
01
N
340/124.5
G01N 21/90 (2006.01) G01N 21/88 (2006.01)
Patent
CA 1250920
ABSTRACT OF THE DISCLOSURE A bottle cap inspection apparatus having a circular shaped light source which is placed to irradiate a cap on a bottle mouth from its above; a photoelectric conversion sensor placed above the cap for receiving a reflected light on the cap; an electronic processer for precessing an electrical signal from the photoelectric conversion sensor to inspect defects of the cap; the bottle being placed under the photoelectric conversion sensor in a manner that the center axis of the bottle coincides with an optical axis of the photoelectric conversion sensor, the center of the circular light source coinciding with the optical axis; and an optical mask located between the light source and the cap on the bottle mouth such that it defines an outer peripheral surface of a visual field of the photoelectric conversion sensor looking at the bottle mouth as well as an inner peripheral surface of the irradiation range onto the bottle mouth from the circular light source as different conical shapes, a portion of the bottle mouth cap to be inspected being located in a vicinity of the crossing portion of the outer peripheral surface of the conical shaped visual field of the photoelectric conversion sensor with the inner peripheral surface of the irradiation range of the circular light source.
505130
Shimizu Toshiyuki
Sudo Masao
Gowling Lafleur Henderson Llp
Hajime Industries Ltd.
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