Electric lamp or space discharge component or device manufacturi – Process – With assembly or disassembly
Patent
1987-06-09
1988-10-18
Ramsey, Kenneth J.
Electric lamp or space discharge component or device manufacturi
Process
With assembly or disassembly
445 45, 445 52, 445 68, H01J 9227, H01J 920
Patent
active
047784270
ABSTRACT:
Negative interference fixturing means and process are disclosed for use in the photoexposure of an in-process faceplate assembly for a color cathode ray tube, and the attachment of a shadow mask to its support. The assembly includes a flat glass faceplate having on its inner surface a centrally disposed screening area for receiving a predetermined pattern of phosphor deposits, a shadow mask having a pattern of apertures corresponding to the pattern of phosphor deposits, and a shadow mask support structure located on opposed sides of the screening area for supporting the mask in tension. The negative interference fixturing means comprises shadow mask mounting means for mounting and locating the mask in tension in a proximate, but negative interference relationship with the mask support structure, and means for installing the faceplate on a photoexposure lighthouse in conjunction with the shadow mask mounting means, and for positioning the mounting means relative to the faceplate and the support structure such that the predetermined pattern of shadow mask apertures lies in precise registration with the screening area. The fixturing means also includes means for temporarily urging the shadow mask into uniform engagement with the support structure while maintaining the precise registration with the screening area, and means for photoexposing the screening area, and welding the mask to its support. As a result, precise registration of the screening area of the faceplate with the shadow mask apertures is accomplished without frictional constraint between the shadow mask support structure and the mask.
REFERENCES:
patent: 2625734 (1953-01-01), Law
patent: 2654940 (1953-10-01), Law
patent: 3894321 (1975-07-01), Moore
patent: 4547696 (1985-10-01), Strauss
patent: 4591344 (1986-05-01), Palac
patent: 4593224 (1986-06-01), Palac
patent: 4656389 (1987-04-01), Palac
patent: 4695761 (1987-09-01), Fendley
patent: 4721488 (1988-01-01), Dougherty et al.
Grimes et al., "Improvements in the RCA Three-Beam Shadow Mask Color Kinescope", Jan. 1954.
Ramsey Kenneth J.
Zenith Electronics Corporation
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