Pin registration board and method

Claim 1

IN A METHOD FOR PREPARING A PHOTOSENSITIVE PLATE WITH MULTIPLE EXPOSURES THEREON UTILIZING A SUBSTANTIALLY TRANSPARENT, DIMENSIONALLY STABLE MASK FORMING A REGISTRATION MEMBER HAVING PRECISELY POSITIONED HOLES WITH A PREDETERMINED SPACING BETWEEN THE SAME, ADJACENT OPPOSITE SIDE EDGES OF THE MEMBER, A PLURALITY OF PINS, A MASK HAVING AN IMAGE CARRIED THEREBY, AND A PAIR OF MASK CONTROL STRIPS, PLACING THE PHOTOSENSITIVE PLATE ON THE MEMBER AND SECURING THE SAME THERETO, PLACING PINS IN THE HOLES IN THE MEMBER SO THAT THERE IS A UNIFORM PREDETERMINED SPACING BETWEEN THE PINS, PLACING AT LEAST A PAIR OF SPACED HOLES IN EACH MASK CONTROL STRIP, THE SPACING BETWEEN THE HOLES ON EACH OF THE MASK CONTROL STRIPS BEING IDENTICAL BUT BEING DIFFERENT FROM THE SPACING BETWEEN THE PINS IN THE REGISTRATION MEMBER, SECURING THE MASK CONTROL STRIPS AT SPACED POINTS ON THE MASK SO THAT THE MASK CONTROL STRIPS CAN BE POSITIONED SO THAT ONE OF THE PINS ON EACH OF THE SAID TWO SIDES OF THE MEMBER EXTENDS THROUGH ONE OF THE HOLES IN ONE OF THE MASK CONTROL STRIPS WHEREBY THE MASK CONTROL STRIPS ARE RETAINED BY PINS OF PRECISELY POSITION THE MASK AND THE IMAGE CARRIED THEREBY, SUCCESSIVELY POSITIONING THE MASK BEARING THE IMAGE TO BE REPRODUCED ON THE PLATE UPON SUCCESSIVE PINS OF THE REGISTRATION MEMBER UTILIZING SUCCESSIVE HOLES OF THE MASK CONTROL STRIPS, AND EXPOSING THE PLATE TO THE IMAGE AFTER EACH STEP OF THE MASK.