1. APPARATUS FOR MAKING PERFORATING STRIP, INCLUDING, A CIRCULAR BLANK ROLL DIE WITH A CONTINUOUS GROOVE CAVITY IN THE CENTER OF ITS OUTER DIAMETER SURFACE, A CIRCULAR IMPRESSION ROLL DIE WITH TOOTH CAVITIES SPACED IN ALIGNMENT ALONG THE CENTER LINE OF THE OUTER DIAMETER SURFACE OF THE ROLL DIE AND HAVING UNIFORM DEPTH TOWARD THE CENTER OF THE ROLL DIE FROM THE SURFACE, MEANS FOR MAINTAINING THE ROLLS IN CONTACT AT THEIR PERIPHERIES WITH THE ALIGNED TOOTH CAVITIES EXTENDING ALONG THE CENTER OF THE GROOVE CAVITY WHILE THE ROLL DIES ARE ROTATED TOGETHER, A SUPPLY OF SOFT ANNEALED LOW-CARBON STEEL WIRE ARRANGED AT THE ENTRY TO THE ROLL DIES AND FED INTO THE TOOTH AND GROOVE CAVITIES OF THE ROLLS SO AS TO BE CONTINUOUSLY AND PROGRESSIVELY COLD FORGED BY THE DIE ROLLS INTO A PERFORATING STRIP HAVING A FLAT FACE AS A BASE AND A SECOND FLAT FACE WITH ELONGATED TEETH ARRANGED IN ALIGNMENT ALONG THE CENTER LINE OF THE SECOND FLAT FACE, A STEADY REST MOUNTED AT THE EXIT FROM THE ROLL DIES AND PROVIDING A FLAT SURFACE OVER WHICH THE COLD FORGED PERFORATING STRIP IS PASSED, AND A GRINDER ELEMENT MOUNTED OVER THE SURFACE OF THE STEADY REST TO SHARPEN THE TEETH OF THE STRIP AS THEY ARE PASSED FROM THE DIES OVER THE SURFACE OF THE STEADY REST.