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Method of drape drawing a shadow mask for a colour display tube, shadow mask manufactured by said method, and colour display tube comprising such a shadow mask
Method of drape drawing a shadow mask for a colour display tube, shadow mask manufactured by said method, and colour display tube comprising such a shadow mask
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机译:披覆用于彩色显像管的荫罩的方法,通过所述方法制造的荫罩以及包括这种荫罩的彩色显象管
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摘要
A shadow mask sheet 1 for a colour display tube consisting of an iron-nickel alloy of the invar type is drape drawn by means of a drawing process. During said drawing process the shadow mask sheet 1 is provided with a skirt 2. By keeping the rim 16 of the skirt 22 clamped in a slip-free manner during the drawing process, the skirt 22 can be plastically deformed simultaneously with the formation of the skirt 22, as a result of which the reproducibility of the shape of the shadow mask sheet 1 is increased.
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