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    • 7. 发明专利
    • MX160021A
    • 1989-11-07
    • MX111185
    • 1985-12-27
    • BROCKWAY INC
    • JOSEPH JAMES RWESDOCK JAMES FLEARCH ALLEN
    • B07C5/34B65B57/02G01N21/90B07C1/12
    • An apparatus and method for detecting sidewall and dimensional defects in transparent containers includes a laser scanning system (40, 42, 44) positioned astride a conveyor (12) in a production line. In an upstream inspection zone a laser beam vertically scans a portion of the side wall of the container. Photosensors (62, 64, 66, 68) positioned in a detection chamber (56) 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 (78) and when the count equals a pre-set value a reject signal is generated (98) to eject the defective container from the conveyor. If a container is not rejected, is passes through a rotator assembly which rotates the container precisely 90 DEG . The container then continues to a similar downstream inspection zone where an indentical scanning and detection process is repeated with regard to the previously uninspected portions of the side wall of the container.