Factory fixture frame with means for temporarily and removably s

Details Factory fixture frame with means for temporarily and removably s Factory fixture frame with means for temporarily and removably s

1987-12-31

1990-06-19

Ramsey, Kenneth J.

Electric lamp or space discharge component or device manufacturi

Process

With assembly or disassembly

445 68, 24462, 29448, 3810291, H01J 9227, H01J 900

Patent

active

049349740

ABSTRACT:
A reusable factory fixture frame is disclosed for use in the manufacture of a color cathode ray tube having a flat faceplate and a tensed foil shadow mask. The frame provides for mounting an in-process shadow mask during photoexposure of an in-process faceplate in a lighthouse. The frame includes a generally rectangular frame structure having grooves thereabout for receiving an edge of the shadow mask. Quick-release mechanical spring clips are provided for temporarily and removably supporting the in-process shadow mask in tension in the grooves. The shadow mask is heated and allowed to expand prior to being temporarily and removably supported on the frame, and the shadow mask is allowed to cool and shrink in tension while so being supported to effect tensing of the shadow mask in clamped condition on the frame.

REFERENCES:
patent: 2625734 (1953-01-01), Law
patent: 2654940 (1953-10-01), Law
patent: 2867028 (1959-01-01), Trost
patent: 3357459 (1967-12-01), Cahen et al.
patent: 3557695 (1971-01-01), Preuss
patent: 3894321 (1975-07-01), Moore
patent: 3962805 (1976-06-01), Hamu
patent: 4525909 (1985-07-01), Newman
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: 4790786 (1988-12-01), Stauss
Improvements in the RCA Three-Beam Shadow Mask Color Kinescope, by Grimes, et al. The IRE, Jan., 1954; decimal classification R583.6.

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