Continuous laser beam FTM mounting for CRT

Details Continuous laser beam FTM mounting for CRT Continuous laser beam FTM mounting for CRT

1990-01-02

1991-05-07

Ramsey, Kenneth J.

Electric lamp or space discharge component or device manufacturi

Process

With assembly or disassembly

21912163, H01J 900, B23K 2600

Patent

active

050132750

ABSTRACT:
Continuous, or seam, welding of a foil tension mask (FTM) to a support structure in a color cathode ray tube (CRT) affords various advantages such as a more uniform, stronger weldment, reduced weld power, faster welding speeds, and reduced contamination of the FTM and the CRT's glass faceplate. A continuous CO.sub.2 laser beam operated at approximately 185 watts output power provides sufficient energy to form a high strength FTM-support structure bond while avoiding severing the FTM as well as fouling of the small FTM spertures by the heated, molten portions of the FTM and its support structure.

REFERENCES:
patent: 4461945 (1984-07-01), O'Cheskey et al.
patent: 4695761 (1987-09-01), Fendley
patent: 4778427 (1988-10-01), Strauss
patent: 4828523 (1989-05-01), Fendley et al.
patent: 4834686 (1989-05-01), Kautz et al.
"Pulsed Laser Beam Welding"; Metals Handbook, 9th Ed., vol. 6, American Soc. for Metals, Metals Park, Ohio 1983, pp. 656-658.

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