| 摘要 |
Apparatus for inspecting glass containers to determine the presence of the defect termed "bird swing." Containers to be inspected are moved in series on a moving belt conveyor to an inspection position where a rotating multifaceted mirror causes a beam of light to sweep the container sidewall from bottom to top. If no defect is present, the beam of light passes through the container sidewall. A pair of elongated photosensitive elements are positioned adjacent to the container to view the illuminated wall portion of the container at an angle with respect to the direction of the moving light beam. Should a "bird swing" defect be present, the light beam is deflected from its normal position into one or both of the photosensitive elements. The receipt of a signal by one or the other of these photosensitive elements activates a reject circuit which causes the container having the defect to be rejected from the stream of bottles. The reject mechanism takes the form of a stream of high pressure air under the control of a solenoid valve. |
