Support frame for a planar mask pertaining to a cathodic...

Details Support frame for a planar mask pertaining to a cathodic... Support frame for a planar mask pertaining to a cathodic...

H - Electricity

01

J

H01J 29/07 (2006.01)

Patent

CA 2363778

The support frame for a planar mask pertaining to a cathodic colour display tube, which is generally rectangular in shape, comprises two vertical end members (41,41') that are placed opposite each other and can receive a planar mask, in addition to two side members (40,40') that keep the vertical end members separate from each other. The vertical end members and the side members are generally tubular in shape and are assembled in such a way as to constitute a practically continuous hollow body, whereby it is possible to define a closed planar line that is located fully inside the hollow body and passes inside each vertical end and side member. The inventive support frame can be made by folding a single metal strip or by interlocking two pressed casting moulds. The production method involves folding.

Le cadre support de masque d'ombre pour tube cathodique de visualisation en couleur, de forme généralement rectangulaire, comporte deux montants d'extrémité (41, 41') disposés en regard l'un de l'autre et destinés à recevoir un masque d'ombre, et deux montants latéraux (40, 40') destinés à maintenir les montants d'extrémité écartés l'un de l'autre. Lesdits montants d'extrémité et lesdits montants latéraux sont de forme généralement tubulaire et sont assemblés de façon à constituer un corps creux pratiquement continu de telle sorte qu'il soit possible de définir une ligne fermée plane, située entièrement à l'intérieur du corps creux et passant à l'intérieur de chacun desdits montants d'extrémité et latéraux. Il peut être réalisé par pliage d'une seule bande métallique ou par emboîtement de deux coquilles embouties. Procédé de fabrication par pliage.

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