Method of making matching photoprinting masters
Abstract
Abstract TWO MATCHED PHOTOPRINTING MASTERS, ONE COMPRISING AN ARRAY OF UNIFORM OPAQUE DOTS OF A GIVEN SIZE AND THE OTHER COMPRISING AN ARRAY OF OPAQUE DOTS OF A DIFFERENT SIZE, ON A TRANSPARENT BACKGROUND, WITH EXACTLY THE SAME PATTERN, ARE MADE BY FIRST MAKING AN ACCURATE ORIGINAL MASTER, HAVING AN ARRAY OF ELEMENTAL AREAS, EACH CONTAINING, THE OUTLINES OF THE TWO DIFFERENT SIZE DOTS IN THE TWO DESIRED MATCHING MASTERS, POSITIONED IN THE DESIRED PATTERN ON A TRANSPARENT BACKGROUND, AND AT LEAST ONE INTERMEDIATE ORIGINAL MASTER COMPRISING AN ARRAY OF OPAQUE DOTS HAVING A DIAMETER INTERMEDIATE THE DIAMTERES OF THE TWO DIFFERENT SIZE DOTS, ARRANGED IN A PATTERN CLOSELY MATCHING THE DESIRED PATTERN ON A TRANSPARENT BACKGROUND. THEN, THESE TWO MASTERS ARE COMBINED BY PHOTOPRINTING TECHNIQUES, USING THE INTERMEDIATE MASTER TO MASK PORTIONS OF THE OUTLINES OF THE ACCURATE MASTER, TO PRODUCE THE DESIRED TWO MATCHING SMALL AND LARGE DOT MASTERS, THESE TWO MATCHING MASTERS MAY BE USED IN THE MAKING OF SHADOW MASKS FOR COLOR PICTURE TUBES.
Inventors
- 👤 John Alton Dodd Jr
- 👤 George Harry Line
Bibliographic Details
Claims Analysis
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