Frontplate and shadow mask assemblies for a modular flat panel d

Details Frontplate and shadow mask assemblies for a modular flat panel d Frontplate and shadow mask assemblies for a modular flat panel d

1980-01-17

1981-12-29

Demeo, Palmer C.

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313403, 313422, H01J 2907, H01J 2986

Patent

active

043084842

ABSTRACT:
A faceplate assembly for a display device is composed of a shadow mask assembly and a frontplate assembly both of which can be individually assembled. The shadow mask assembly is composed of a plurality of vane tips positioned between a plurality of channel shaped shadow mask sections. Tie rods pass through the tips and tip spacers to hold the members together in a single assembly. The spacers are positioned inside the tip walls to control the transverse dimension of the shadow mask assembly. The frontplate assembly includes location blocks which are affixed to the frontplate in the proximity of the corners of the frontplate. Location notches are precisely located on the frontplate and the precise positions of the location blocks with respect to the location notches recorded. A shadow mask assembly and a frontplate assembly are mated and the shadow mask assembly precisely positioned by inserting shims of the required thicknesses between the location blocks and the mask assembly.

REFERENCES:
patent: 4101802 (1978-07-01), Andrevski
patent: 4103205 (1978-07-01), Credelle
patent: 4145633 (1979-03-01), Peters et al.
patent: 4259611 (1981-03-01), Van Raalte

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