PAPER TRIMMERS, CONVEYORS, FOLDING MACHINES, COMBINED CUTTER-FOLDERS, CUTSHEET FEEDERS, CHART FOLDERS, AND PRINTING MACHINES

APPARATUS FOR RECEIVING SHEETS OF GENERALLY PLANAR FLEXIBLE MATERIAL, SUCH AS BLUEPRINTS AND THE LIKE, SUPPLIED OR FED TO THE APPARATUS, FOR FOLDING THE RESPECTIVE SHEETS AUTOMATICALLY TO PREDETERMINED DIMENSIONS OF SMALLER AREA THAN THAT OF SUCH SHEETS