Planar member for shadow mask of cathode-ray tube and manufactur

Details Planar member for shadow mask of cathode-ray tube and manufactur Planar member for shadow mask of cathode-ray tube and manufactur

1997-05-09

1999-07-27

O'Shea, Sandra

Electric lamp or space discharge component or device manufacturi

Process

With assembly or disassembly

445 47, H01J 920

Patent

active

059280476

ABSTRACT:
A planar member for a shadow mask is provided, which is hard to generate wrinkles in or break when being pulled at four sides to apply a tension to a beam-selecting area with beam-passing apertures. The planar member comprises the beam-selecting area, a first band frame portion surrounding the beam-selecting area, a second band frame portion disposed around and spaced from the first band frame, a plurality of bridge portions bridging the first and second band frame portions at plural points, and a plurality of outer areas with plural apertures, defined by the first and second band frame portions and two bridge portions. The connecting part of the bridge portion with the second band frame portion is reinforced in such a way that the width of the bridge portion increases gradually to connect with the second band frame portion.

REFERENCES:
patent: 4767962 (1988-08-01), Adler et al.
patent: 4942333 (1990-07-01), Knox
patent: 5364340 (1994-11-01), Coll
patent: 5396145 (1995-03-01), Shiohara et al.
patent: 5620127 (1997-04-01), MacKenzie

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