Method of manufacturing cathode ray tubes with binary coded face

Details Method of manufacturing cathode ray tubes with binary coded face Method of manufacturing cathode ray tubes with binary coded face

1989-12-28

1991-05-28

Ramsey, Kenneth J.

Electric lamp or space discharge component or device manufacturi

Process

With assembly or disassembly

445 3, 445 1, 445 45, 220 21A, 346140R, H01J 100

Patent

active

050190040

ABSTRACT:
A method of manufacturing CRT tubes with binary coded faceplates including dispensing a frit paste on the faceplate in the form of a bar code. The frit is devitrified as part of conventional faceplate processing either during normalizing or during devitrification of the mask rail frit without any additional steps. In one embodiment the frit is dispensed through a single dispensing nozzle and the nozzle is moved relative to the faceplate in x and y coordinates to form a single undulating line. In another embodiment, frit is selectively dispensed through a plurality of nozzles for each character pair to form either narrow bars or wide bars.

REFERENCES:
patent: 4514456 (1985-04-01), Deal et al.
patent: 4692351 (1987-09-01), Maeda et al.
patent: 4720914 (1988-01-01), Maeda et al.
patent: 4721488 (1988-01-01), Dougherty et al.
patent: 4778427 (1988-10-01), Strauss
patent: 4791267 (1988-12-01), Yokoyama et al.
patent: 4856670 (1989-08-01), Hang et al.

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