Combined safety and exhaust hood for pressing machine

Claim 1

A PRESSING MACHINE COMPRISING A SUPPORT, A STATIONARY BUCK ON SAID SUPPORT, A MOVABLE PRESSING HEAD MOUNTED ON SAID SUPPORT FOR A MOTION CYCLE INCLUDING A CLOSING PHASE FROM AN OPEN POSITION TO A CLOSED POSITION, PNEUMATIC ACTUATING MEANS OPERATIVELY CONNECTED TO SAID PRESSING HEAD FOR MOVING SAID PRESSING HEAD THROUGH SAID CLOSING PHASE INTO SAID CLOSED POSITION, SPRING MEANS OPERATIVELY CONNECTED TO SAID PRESSING HEAD ARRANGED TO RETURN SAID PRESSING HEAD TO SAID OPEN POSITION, A COMBINED VENTILATING AND SAFETY HOOD OF LOW MASS RELATIVE TO SAID PRESSING HEAD POSITIONED OVER SAID PRESSING HEAD AND TERMINATING IN A SENSING PORTION SURROUNDING AND BELOW SAID PRESSING HEAD, MEANS MOUNTING SAID HOOD ON SAID PRESSING HEAD FOR RELATIVE MOVEMENT THEREBETWEEN DURING AN INTERVAL OF PHYSICAL CONTACT OF SAID SENSING PORTION WITH AN OBSTRUCTION BENEATH SAID PRESSING HEAD, A PNEUMATIC SUPPLY FOR SAID ACTUATING MEANS AND CONTROL MEANS FOR CONNECTING SAID PNEUMATIC SUPPLY TO SAID ACTUATING MEANS FOR INITIATING SAID MOTION CYCLE AND INCLUDING SENSING MEANS RESPONSIVE TO SAID PHYSICAL CONTACT BETWEEN SAID SENSING PORTION AND SAID OBSTRUCTION FOR DISCONNECTING SAID PNEUMATIC SUPPLY FROM SAID ACTUATING MEANS WHEREBY SAID MOTION CYCLE IS ABORTED AND SAID PRESSING HEAD AND HOOD ARE RESTORED TO SAID OPEN POSITION BY SAID SPRING MEANS.