Powers Manufacturing Incorporated

Francis D McLeod, Jr

A container such as a glass bottle is inspected for out-of-round condition while being rotated and moved in line through a test area. A transmitter transducer directs a signal such as a 40 Khz acoustic wave to the outer surface of the bottle. The signal (such as the acoustic wave) reflected from the outer surface of the bottle is received by a receiver transducer. Changes in the phase difference between the transmitted and received signals are detected while the bottle is rotated. The difference between the maximum and minimum values of the changes in phase difference is compared to a threshold value to determine whether an out-of-round condition is tolerable. The bottle is ejected from the line if the difference signal exceeds the threshold value.

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Ithaca, NY, United States of America

Francis D McLeod, Jr