Tape transport mechanism

Claim 1

IN COMBINATION WITH A TAPE TRANSPORT SYSTEM HAVING A TAPE DRIVING CAPSTAN, A SOLENOID COMPRISING A POLE PIECE, A MOVABLE ARMATURE WITH A PINCH ROLLER ATTACHED THERETO, SAID PINCH ROLLER MOVABLE TOWARD SAID CAPSTAN AS SAID ARMATURE IS ATTRACTED TO SAID POLE PIECE AND SAID ARMATURE MOVABLE AWAY FROM SAID POLE PIECE AS SAID PINCH ROLLER IS MOVED AWAY FROM SAID CAPSTAN, AND A SUPPLY OF TAPE MOUNTED FOR TRANSMISSION BY SAID CAPSTAN; THE IMPROVEMENT COMPRISING A TAPE LEADER FOR SAID TAPE HAVING A THICKNESS SUBSTANTIALLY THROUGHOUT THE LENGTH OF THE LEADER MUCH GREATER THAN THAT OF SAID TAPE, WHEREBY UPON MOVEMENT OF SAID LEADER BETWEEN SAID CAPSTAN AND SAID PINCH ROLLER AT A TIME WHEN SAID SOLENOID IS ENERGIZED, SAID PINCH ROLLER WILL BE FORCED AWAY FROM SAID CAPSTAN AND SAID ARMATURE WILL MOVE AWAY FROM SAID POLE PIECE, WITH A CONSEQUENT REDUCTION IN THE MAGNETIC FORCE URGING SAID PINCH ROLLER TOWARD SAID CAPSTAN, THE REDUCTION IN MAGNETIC FORCE BEING SUFFICIENT TO ALLOW SLIPPAGE BETWEEN SAID LEADER AND SAID CAPSTAN.