Operating system for press platens

Claim 1

AN OPERATING SYSTEM FOR FLUID PRESSURE OPERATED MACHINES HAVING A MOVABLE COMPONENTS POWERED BY A DOUBLE ACTING PISTON AND CYLINDER ASSEMBLY, SAID SYSTEM COMPRISING A FIRST FLUID PRESSURE LINE COMMUNICATION WITH A FIRST END OF SAID CYLINDER, CHECK VALVE MEANS IN SAID FIRST LINE, PRESSURE REGULATING VALVE MEANS IN SAID FIRST LINE BETWEEN THE CHECK VALVE MEANS AND THE CYLINDER, PRESSURE RELIEF VALVE MEANS IN SAID FIRST LINE BETWEEN THE PRESSURE REGULATING VALVE MEANS AND THE CYLINDER, SAID FIRST LINE BEING COMMUNICATED WITH A SUPPLY LINE, A SECOND FLUID PRESSURE LINE COMMUNICATED WITH THE SECOND END OF THE CYLINDER AND ALSO BEING COMMUNICATED WITH THE SUPPLY LINE, A TWO WAY VALVE IN SAID SECOND LINE WHERE IT COMMUNICATES WITH THE SUPPLY LINE, A CONTROL LINE COMMUNICATED WITH SAID TWO WAY VALVE WHEREBY THE TWO WAY VALVE WILL SELECTIVELY ADMIT PRESSURE TO SAID SECOND LINE OR CLOSE OFF THE SECOND LINE FROM THE SUPPLY LINE AND COMMUNICATE THE SECOND LINE WITH SAID CONTROL LINE, CHECK VALVE MEANS IN SAID CONTROL LINE TO ADMIT FLOW ONLY FROM THE TWO WAY VALVE INTO THE CONTROL LINE, A DISCHARGE LINE COMMUNICATED WITH SAID SECOND LINE BETWEEN THE TWO WAY VALVE AND SAID CYLINDER, A DISCHARGE VALVE IN SAID DISCHARGE LINE, CONTROL MEANS CONNECTED WITH SAID DISCHARGE VALVE, SAID CONTROL MEANS BEING COMMUNICATED WITH AND OPERATED IN RESPONSE TO PRESSURE IN THE CONTROL LINE WHEREBY THE DISCHARGE VALVE WILL BE OPENED WHEN THE TWO WAY VALVE IS ORIENTATED TO COMMUNICATE THE SECOND PRESSURE LINE WITH THE CONTROL LINE.