G - Physics – 01 – N
Patent
G - Physics
01
N
341/58, 209/29.1
G01N 21/90 (2006.01) B07C 5/34 (2006.01)
Patent
CA 1244915
ABSTRACT OF THE DISCLOSURE A system for automatically detecting sidewall and dimensional defects in a transparent container includes a laser scanning system positioned astride a conveyor in a production line. In an upstream inspec- tion zone a laser beam vertically scans a portion of the side wall of the container. Photosensors posi- tioned in a detection chamber detect the specific effect which any defect has upon the laser beam by determining the location of light passing through the container and comparing its intensity against pre-set thresholds. A flaw signal is generated when a threshold is exceeded. The number of flaw signals is counted and when the count equals a pre-set value a reject signal is generated to eject the defective container from the conveyor. If a container is not rejected, it passes through a rotator assembly which rotates the conainer precisely 90°. The container then continues to a similar downstream inspection zone where an identical scanning and detection process is repeated with regard to the previously uninspected portions of the side wall of the container.
498555
Brennen Brad
Chollock Ronald
Joseph James R.
Lerch Allen
Lindberg Glenn
Brockway Inc. (n.y.)
Gowling Lafleur Henderson Llp
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