Method for the mounting of a shadow mask in a trichromatic catho

Details Method for the mounting of a shadow mask in a trichromatic catho Method for the mounting of a shadow mask in a trichromatic catho

1988-01-25

1989-12-19

Rowan, Kurt

Electric lamp or space discharge component or device manufacturi

Process

With assembly or disassembly

445 30, 445 52, H01J 9236

Patent

active

048879886

ABSTRACT:
A method for the mounting of a shadow mask in a trichromatic cathode tube pertains especially to the mounting of the mask on a frame. The shadow mask has a perforated, plane active surface which must be held under sufficient mechanical tension, so that it preserves its planarity during the functioning of the tube. The method consists in increasing the dimensions of the active surface, either by heating it to expand it or by stretching it mechanically to give it the desired mechanical tension, and then in soldering the mask to a sufficiently rigid frame to maintain the active surface in its state of mechanical tension.

REFERENCES:
patent: 2625734 (1953-01-01), Law
patent: 3493356 (1970-02-01), Torrence
patent: 3894321 (1975-07-01), Moore
patent: 4069567 (1978-01-01), Schwartz
patent: 4591344 (1986-05-01), Palac
patent: 4652791 (1987-03-01), Palac et al.
patent: 4721488 (1988-01-01), Dougherty

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