Automatic thickness control means for flat products

Claim 1

IN A PRESS HAVING RESPECTIVE STATIONARY AND MOVABLE DIE MEMBERS IN TELESCOPIC RELATION FOR FORMING A DIE CAVITY, A DUST BOX RECIPROCALLY MOVABLE ACROSS SAID DIE CAVITY TO DEPOSIT DUST THEREIN, AN IMPACT MEMBER ABOVE SAID CAVITY FOR PRESSING DUST THEREIN INTO FLAT PRODUCTS, A HORIZONTAL TABLE ADJACENT TO SAID PRESS AND ONTO WHICH SAID PRODUCTS ARE PUSHED IN SUCCESSION BY THE FRONT END OF SAID DUST BOX, SAID PRESS ALSO HAVING AN OPERATING CYLINDER WITH ITS PISTON CONNECTED TO SAID MOVABLE DIE MEMBER FOR EFFECTING MOVEMENT THEREOF ON SAID STATIONARY MEMBER IN EITHER DIRECTION, A CAM SHAFT HAVING THEREON A FIXED CAM JOURNALED IN SAID PRESS, AND AN ABUTMENT ON SAID PISTON IN ENGAGEMENT WITH SAID CAM FOR LIMITING THE FORWARD MOVEMENT OF SAID PISTON TOGETHER WITH SAID MOVABLE DIE MEMBER: MEANS IN SAID PRESS FOR ROTATABLY ADJUSTING SAID CAM TO CORRECT VARIATIONS IN THE THICKNESS OF FLAT PRODUCTS PRESSED IN SAID DIE CAVITY, SAID MEANS COMPRISING, IN COMBINATION, A HYDRO-PNEUMATIC CYLINDER HAVING A PISTON, A SERIES OF COOPERATIVE MEMBERS CONNECTING SAID PISTON TO SAID CAM SHAFT FOR EFFECTING ROTARY ADJUSTMENT OF SAID CAM TOWARD AND FROM THE ABUTMENT ON SAID PISTON, AN INJECTION CYLINDER HAVING COMMUNICATION AT ITS ENDS WITH SOURCES OF LIQUID PRESSURE AND WITH EACH END OF SAID HYDRO-PNEUMATIC CYLINDER FOR FORCING SMALL INCREMENTS OF LIQUID PRESSURE INTO EITHER END OF SAID CYLINDER, ELECTRICAL VALVE MEANS FOR CONTROLLING THE FLOW OF LIQUID PRESSURE INTO AND FROM SAID INJECTION CYLINDER, AN ELECTRICAL LINEAR ACTUATOR MOUNTED ABOVE THE AFORESAID HORIZONTAL TABLE AND ACTUATED BY COMPLATED FLAT PRODUCTS PASSING THEREUNDER IN SLIDABLE CONTACT THEREWITH, AN ELECTRICAL RELAY CONNECTED IN AN ELECTRICAL CIRCUIT WITH SAID LINEAR ACTUATOR AND WITH ALL OF SAID ELECTRICAL VALVE MEANS FOR ACTUATING SAID VALVE MEANS COOPERATIVELY IN RESPONSE TO VARIATIONS IN THE THICKNESS OF FLAT PRODUCTS PASSING UNDER SAID LINEAR ACTUATOR FOR CONTROLLING THE MOVEMENT OF THE PISTON OF THE HYDRO-PNEUMATIC CYLINDER IN EITHER DIRECTION AND THEREBY, THROUGH THE AFORESAID SERIES OF COOPERATIVE MEMBERS, EFFECTING ROTARY ADJUSTMENT OF SAID CAM TOGETHER WITH THE DEPTH OF SAID DIE CAVITY.