Production of magnetic sound tape

Claim 1

IN A METHOD OF PRODUCING BLANK MAGNETIC SOUND RECORING TAPE WHEREIN AN ELONGATED PIECE OF TAPE BASE OF THE MOVING PICTURE FILM TYPE HAVING AT LEAST ONE LONGITUDINAL ROW OF SPROCKET HOLES IN UNWOUND FROM A ROLL OF THE SAME IN A WINDING ZONE, PASSED WHILE UNDER TENSION THROUGH A MAGNETIC COATING ZONE AND A DRYING ZONE AND WOUND INTO A ROLL IN A WINDING ZONE; THE IMPROVEMENT WHICH COMPRISES UNWINDING THE TAPE BASE FROM THE ROLL IN AN UNWINDING ZONE SEPARATED AND REMOVED FROM THE MAGNETIC COATING ZONE TO MAKE POSSIBLE A FIXED PATH OF TRAVEL FOR THE UNWOUND TAPE BASE AS IT GOES THROUGH THE MAGNETIC COATING ZONE, PASSING THE TAPE BASE WHILE STILL UNDER TENSION FROM THE WINDING ZONE, IN A FIXED PATH OF TRAVEL, THROUGH A GAP OF PREDETERMINED TRANVERSE HEIGHT BENEATH A SUPERPOSED SOURCE OF A FLUID MAGNETIC COATING MATERIAL AND, AS THE TAPE PASSES BENEATH SAID SOURCE OF COATING MATERIAL, DEPOSITING ON THE TOP SURFACE OF AN INTERMEDIATE TRANSVERSE PORTION OF THE TAPE BASE AND INWARDLY OF THE ROW OF SPROCKET HOLES A COATING OF THE MAGNETIC MATERIAL, SAID FIXED PATH OF TRAVEL CARRYING THE TAPE BASE A FIXED DISTANCE BELOW THE SOURCE OF THE COATING MATERIAL, WHEREBY THE LAYER OF COATING MATERIAL APPLIED TO THE TAPE BASE IS OF PREDETERMINED UNIFORM WIDTH AND THICKNESS, AND SEPARATELY REMOVING ANY OF THE MAGNETIC COATING MATERIAL DRAINING THROUGH SAID SPROCKET HOLES TO PREVENT SPREADING OF THE COATING MATERIAL LATERALLY BEYOND THE HOLES OF THE TAPE BASE.