Cutting machine having magnetic storage mechanism for control of work feed means

Claim 1

IN A PAPER CUTTER HAVING A POWER OPERATED KNIFE, A TABLE FOR SUPPORTING PILES OF MATERIAL TO BE CUT BY SAID KNIFE, AND A POWER OPERATED BACK GAGE MOVABLE OVER SAID TABLE TOWARD AND AWAY FROM SAID KNIFE TO POSITION A PILE FOR CUTTING; THE IMPROVEMENT COMPRISING SELECTIVELY OPERABLE AND REVERSIBLE DRIVE MEANS FOR SAID BACK GAGE FOR EFFECTING CONTROLLED MOVEMENT THEREOF, A MEMORY DEVICE IN THE FORM OF A TUBE MOUNTED TO EXTEND ALONG THE PATH OF MOVEMENT OF SAID BACK GAGE AND HAVING A SURFACE THEREON CAPABLE OF STORING A PLURALITY OF MAGNETICALLY CREATED MARKS INDICATING DESIRED POSITIONS OF SAID BACK GAGE A POSITION CONTROL READING/RECORDING HEAD MOVABLE WITH SAID BACK GAGE AND POSITIONED TO SCAN ALONG SAID TUBE AND SELECTIVELY TO RECORD REFERENCE MARKS THEREON AND TO READ THE REFERENCE MARKS THEREFROM FOR PRODUCING CONTROL SIGNALS, A DIRECTION CONTROL READING/RECORDING HEAD ALSO MOUNTED TO MOVE WITH SAID AFOREMENTIONED HEAD ALONG SAID TUBE ON A DIFFERENT PATH AND SELECTIVELY TO CREATE DIRECTION CONTROL MARKS ALONG SAID DIFFERENT PATH AND TO READ DIRECTION CONTROL MARKS THEREFROM, CONTROL CIRCUITY CONNECTED TO RECEIVE SIGNALS FROM EACH OF SAID HEADS AND INCLUDING A DRIVE REVERSING CIRCUIT OPERABLE IN RESPONSE TO A SIGNAL FROM SAID DIRECTION CONTROL HEAD DURING MOVEMENT OF THE BACK GAGE TOWARD THE KNIFE TO REVERSE SAID DRIVE MEANS AND SIMULTANEOUSLY TO MAKE INEFFECTIVE CONTROL SIGNALS FROM SAID POSITION CONTROL HEAD WHEREBY SAID BACK GAGE IS THEN OPERATED IN A REVERSE DIRECTION TO MOVE AWAY FROM THE KNIFE, AND SAID REVERSE CONTROL CIRCUIT INCLUDING MEANS RESPONSIVE TO A SUBSEQUENT SIGNAL FROM SAID DIRECTION CONTROL HEAD TO AGAIN REVERSE SAID DRIVE MEANS AND THEREBY TO CAUSE SAID BACK GAGE TO MOVE FORWARD TOWARD SAID KNIFE AND SIMULTANEOUSLY TO RESTORE THE CONTROL OF SAID DRIVE MEANS TO SAID CIRCUITS RESPONSIVE TO SAID POSITION CONTROL HEAD.