Method for the photographic production of an original for printing purposes with the aid of a line screen

Claim 1

IN THE METHOD OF MANUFACTURING PRINTING PLATES FOR REPRODUCING FROM CONTINUOUS TONE, BLACK AND WHITE OR COLORED STEREOSCOPIC PHOTOGRAPHS COMPRISING A SERIES OF NARROW, JUXTAPOSED STEREO SEPARATIONS, HALF-TONE STEREOSCOPIC ILLUSTRATIONS HAVING A SERIES OF SIMILAR STEREO SEPARATIONS AND AN ATTACHED LENTICULAR VIEWING SCREE, THE STEPS OF, SUPPORTING A PHOTO-SENSITIVE MATERIAL IN THE PATH OF A SELECTIVELY OPERABLE LIGHT SOURCE, PROJECTING ONTO THE PHOTO-SENSITIVE MATERIAL THE IMAGE OF THE CONTINUOUSTONE PHOTOGRAPH AND CONCURRENTLY PROJECTING ONTO THE PHOTO-SENSITIVE MATERIAL THE IMAGE OF A LINEATED SCREEN, THE LINES OF WHICH ARE DISPOSED IN NON-PARALLEL RELATIONSHIP TO THE INDIVIDUAL STEREO SEPARATIONS IN THE CONTINUOUSTONE PHOTOGRAPH, THE INDIVIDUAL PROJECTED LINES OF THE LINEATED SCREEN HAVING A MAXIMUM WIDTH NO GREATER THAN APPROXIMATELY THE WIDTH OF THE INDIVIDUAL LENSES OF THE LENTICULATED VIEWING SCREEN TO BE USED WITH THE PRINTED STEREO ILLUSTRATION, THE INTENSITY OF EACH PROJECTED SCREEN LINE CONTINOUSLY VARYING AT LEAST ONCE BETWEEN A MAXIMUM AND A MINIMUM ACROSS THE WIDTH THEREOF.