Method and apparatus for measuring the eccentricity of container

Details Method and apparatus for measuring the eccentricity of container Method and apparatus for measuring the eccentricity of container

1976-07-02

1977-09-06

Knowles, Allen N.

Classifying, separating, and assorting solids

Electrostatic

324 585A, B07C 534

Patent

active

040462587

ABSTRACT:
A method and apparatus for inspecting glass containers is described in which a high frequency field is produced at an inspection station. The high frequency signal, which may be a radio frequency signal, is fed to the antenna of a probe centrally positioned relative to the antenna and coaxial therewith. The probe, as a unit, is supported adjacent the container to be inspected and the container is rotated relative to the probe. The manner of mounting the probe relative to the bottle permits the probe to move closer or further away from the container wall, depending upon the out-of-roundness of the container and the radio frequency signal is picked up by the probe with the signal level depending upon the relative position of the probe and the wall of the container. This varying detection output is compared with a steady state detection output to derive a signal which is proportional to the relative position of the probe and the container wall. The signal is compared with a reject reference signal to indicate a non-acceptable container and may cause rejection of the container.

REFERENCES:
patent: 3379306 (1968-04-01), Mathias et al.
patent: 3708064 (1973-01-01), Schepler
patent: 3710938 (1973-01-01), Scherf
patent: 3776380 (1973-12-01), Damm
patent: 3780859 (1973-12-01), Scherf

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