| 摘要 |
<p>A shadow mask for a colored TV picture tube contains the conventional foraminous or translucent area formed by multiple vertical rows of miniature apertures or slits with the improvement being a pattern set of recesses which are located between the rows of slits and which extend into the margin of the mask. Because of the patterned set of recesses, doming the mask can be accurately and smoothly accomplished for insertion into the envelope of a colored television picture tube.</p> |
