| 摘要 |
<p>Method and apparatus for the centered engraving of flat fine-mesh printing screens covered by photoemulsion and mounted on frames suitable to the polychromatic screen printing, for the manufacture of preset at register frames. The method and the apparatus allow the use of the same references (23, 25, 28) of the frames either in the engraving than in the printing phase, achieving high precision of centering and setting at register. The method and the apparatus comprise means for performing, by means of engraving heads (16), an engraving procedure by interlaced interpolation, in order to reduce the errors due to possible malfunctioning of nozzles.</p> |
