Foil mask stretching apparatus and process

Details Foil mask stretching apparatus and process Foil mask stretching apparatus and process

1987-12-30

1988-09-20

Ramsey, Kenneth J.

Electric lamp or space discharge component or device manufacturi

Process

With assembly or disassembly

29447, 29448, 445 66, H01J 9236

Patent

active

047722380

ABSTRACT:
An apparatus and a process is disclosed for use in the manufacture of a color cathode ray tube having a tensed foil shadow mask with a central apertured area and an unapertured border. The apparatus, which provides for thermally expanding an in-process shadow mask, includes a pair of heated platens for embracing a mask. At least one of the platens has a recess therein with width and length dimensions no less than the apertured area such that migrant particles trapped between the platens cannot damage the apertured area.

REFERENCES:
patent: 2625734 (1953-01-01), Law
patent: 2654940 (1953-10-01), Law
patent: 3357459 (1967-12-01), Cohen et al.
patent: 3894321 (1975-08-01), Moore
patent: 4069567 (1978-01-01), Schwartz
patent: 4591344 (1986-05-01), Palae
"The CBS-Colortron: A Color Tube of Advanced Design," Fyler et al., Proceedings of the IRE, Dec. Class, R583.6, Jan. 1954, pp. 326-334.

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