Out-of-round detector

Details Out-of-round detector Out-of-round detector

1981-01-30

1983-01-18

Gill, James J.

Measuring and testing

Vibration

By mechanical waves

73637, 324 585B, 356428, G01N 2900

Patent

active

043686419

ABSTRACT:
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.

REFERENCES:
patent: 3108469 (1963-10-01), Dyer et al.
patent: 3289468 (1966-12-01), Van der Veer et al.
patent: 3380293 (1968-04-01), Murphy
patent: 3636778 (1972-01-01), Huffstetler
patent: 3828609 (1974-08-01), Furon et al.
patent: 4096738 (1978-06-01), Rupp et al.
patent: 4099418 (1978-07-01), Bennett et al.

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