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

H - Electricity – 01 – J

Patent

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Details

H01J 29/07 (2006.01) H01J 31/10 (2006.01) H01J 31/16 (2006.01)

Patent

CA 2205330

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.

Élément plan pour masque perforé, pour la génération d'onndulations, ou devant se rompre lorsqu'il est tiré par les quatre côtés, pour appliquer une tension à une zone de faisceau avec trous de passage de faisceau. L'élément plan comprend la zone de sélection de faisceau, une partie de première bande entourant la zone de sélection de faisceau, une deuxième bande disposée autour de la première bande et séparée de cette dernière, une pluralité de parties de pont chevauchant la première et la deuxième partie en plusieurs endroits, et une pluralité de zones extérieures avec plusieurs trous, définies par la première et la deuxième bandes et deux parties de pont. La connexion du pont avec la deuxième bande est renforcée d'une manière telle que la partie du pont augmente graduellement pour se raccorder avec la deuxième bande.

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