Glass container wall thickness inspecting machine

Details Glass container wall thickness inspecting machine Glass container wall thickness inspecting machine

1988-10-05

1989-09-26

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Conductor identification or location

Inaccessible

G01R 2726

Patent

active

048703427

ABSTRACT:
The capacitance of the wall of a glass bottle is sensed and converted to a periodic voltage by a measuring oscillator. A periodic voltage is generated by a phase locked loop which includes a voltage controlled reference oscillator which is forced to operate at the same frequency as the measuring oscillator. The voltage inputted to the reference oscillator will accordingly represent the thickness of the wall of the container. The following model is utilized by the machine computer to translate capacitance to thickness;

REFERENCES:
patent: 2573824 (1951-11-01), Baker
patent: 2616068 (1952-10-01), McDonald
patent: 3684089 (1972-08-01), McMeekin
patent: 4658254 (1987-04-01), Walton

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