Paperboard carton blanking dies and method of making same

Claim 1

THE METHOD OF FORMING A FEMALE DIE COMPRISING A PHOTOSENSITIVE SHEET TO BE GROOVED AND PLACED IN REGISTRY WITH THE SCORING RULES OF A MALE DIE FOR USE IN CREASING BOX CARTON BLANKS, THE IMPROVEMENT COMPRISING THE STEPS OF FORMING A PHOTOGRAPHIC REPRODUCTION OF SAID SCORING RULES ON A LIGHT SENSITIVE PLATE, TOGETHER WITH DESIRED CLEARANCE DIMENSIONS, EXPOSING SAID LIGHT SENSITIVE PLATE TO SAID REPRODUCTION FOR REGISTERING AREAS SUSCEPTIBLE TO ETCHING ON SAID PLATE AND CONFORMING TO SAID RULES, ETCHING SAID PLATE TO FORM GROOVES IN SAID AREAS, AND THEREAFTER PRESSING A BLANK BETWEEN SAID MALE DIE AND SAID PLATE WHILE SAID PLATE IS PERMITTED TO SHIFT INTO A POSITION OF REGISTRY WITH SAID MALE DIE.