Method for testing panel-to-funnel sealing layer of a cathode-ra

Details Method for testing panel-to-funnel sealing layer of a cathode-ra Method for testing panel-to-funnel sealing layer of a cathode-ra

1980-03-28

1981-11-24

Tokar, Michael J.

Electricity: measuring and testing

Electric lamp or discharge device

Cathode-ray tube

29574, G01R 3122

Patent

active

043027253

ABSTRACT:
Method of testing a completed cathode-ray tube comprises applying a higher-than-operating voltage between the metal structure around the sidewall of the panel of the tube and the internal conductive coating on the funnel of the tube whereby the panel-to-funnel sealing layer is punctured if it does not have sufficient electrical-breakdown strength.

REFERENCES:
patent: 3943438 (1976-03-01), Barber et al.
Conductive Dand Apparatus for Testing Frit Seal Between Faceplate Panel and Funnel of a Cathode-Ray Tube, by Bachinger et al., RCA Technical Notes No. 1111, May 14, 1975, two sheets.

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