Distortion correction system

Claim 1

IN A METHOD OF MAKING PREPRINTED FLAT STOCK WHICH IS TO BE DRAWN INTO CURVED PRODUCT FORM, THE ART WHICH INCLUDES PROVIDING A DESIGN HAVING PORTIONS SUBSTANTIALLY UNIFORMLY PROPORTIONAL TO CORRESPONDING PORTIONS OF A CURVED SUBSTANTIALLY TRUE REPRODUCTION OF THE DESIGNED WHICH IS TO OCCUR ON THE CURVED SURFACE OF THE DRAWN PRODUCT, OPTICALLY IMPINGING SAID PROPORTIONAL DESIGN UPON A VIEWING SURFACE CHARACTERIZED BY HAVING A SHAPE SUCH THAT THE DISTANCE BETWEEN ITS LONGITUDINAL AXIS AND INTERSECTIONS OF SAID SURFACE WITH PLANES CONTAINING SAID AXIS DECREASES FROM ONE END OF SAID SURFACES TO THE OTHER AND A CURVATURE WHICH PROGRESSIVELY INCREASES AROUND SAID AXIS WITH PROGRESSIVELY DECREASING DISTANCE BETWEEN SAID PROPORTIONAL DESIGN AS THE OBJECT AND SAID VIEWING SURFACE, FOR AN IMAGE OF SAID DESIGN ON SAID VIEWING SURFACE AS VIEWED IN THE DIRECTION OF SAID AXIS TO HAVE DISTORTION WHICH IS TO BE COMPENSATED BY DISTORTION OF THE STOCK WHEN THE STOCK IS BEING DRAWN FROM FLAT FORM TO THE CURVATURE OF THE PRODUCT, AND PRINTING IN PROPER SIZE ONTO PORTIONS OF THE STOCK, WHICH ARE TO BE FORMED CURVED BY DRAWING, A COPY OF SAID IMAGE CORRESPONDING TO A VIEW THEREOF ALONG SAID AXIS, FOR A CURVED SUBSTANTIALLY TRUE REPRODUCTION OF SAID DESIGN TO BE PRODUCED ON THE CURVED PRODUCT WHEN THE FLAT STOCK IS DRAWN.