Control device for rotary printing apparatus

Claim 1

A CONTROL DEVICE FOR CYCLICALLY OPERATING APPARATUS TO INTERRUPT THE OPERATION THEREOF IN THE ABSENCE OF WORKPIECES TO BE PROCESSED, AND INCLUDING A CYCLICALLY ROTATABLE TURRET PLATE HAVING UNIFORMLY CIRCUMFERENTIALLY SPACED MANDRELS CARRYING HOLLOW WORKPIECES THROUGH PLURAL STOPPING POINTS AND EVENTUALLY INTO OPERATIVE RELATION WITH A WORK UNIT INCLUDED IN SAID APPARATUS, SAID DEVICE COPMPRISING, IN COMBINATION A CHECKING DEVICE SELECTIVELY POSITIONABLE FIXEDLY AT A SELECTED ONE OF SAID STOPPING POINTS IN ADVANCE OF SAID WORK UNIT ADJACENT THE PATH OF MOVEMENT OF SAID MANDRELS AND OPERABLE TO DETECT THE ABSENCE OF A HOLLOW WORKPIECE ON A MANDREL; A CONTROL DEVICE FOR STORING AND RELEASING SIGNALS; A FIRST CONTROL SWITCH CONNECTED IN A FIRST INPUT CIRCUIT TO SAID CONTROL DEVICE; A FIRST DRIVING ECCENTRIC PERIODICALLY CLOSING SAID FIRST CONTROL SWITCH IN ACCORDANCE WITH ROTATION OF SAID TURRET PLATE, SAID FIRST CONTROL SWITCH, IN CONJUNCTION WITH SAID CHECKING DEVICE, TRANSMITTING PULSES THROUGH SAID INPUT CIRCUIT TO SAID CONTROL DEVICE FOR STORAGE OF SIGNALS RESPONSIVE TO ABSENCE OF A WORKPIECE ON A MANDREL; A SECOND CONTROL SWITCH; A COUPLING AND BRAKING DEVICE EFFECTIVE, WHEN ACTIVATED, SELECTIVELY TO DRIVE SAID WORK UNIT OR TO ARREST THE LATTER AT A FIXED POSITION; A CONTROLLER FOR SAID DEVICE; SAID SECOND CONTROL SWITCH BEING A NORMALLY OPEN SWITCH CONNECTED IN AN INPUT CIRCUIT TO SAID CONTROLLER; A SECOND ECCENTRIC OPERABLE BY SAID WORK UNIT AND EFFECTIVE TO CLOSE SAID SECOND CONTROL SWITCH TO TRANSMIT A SIGNAL TO SAID CONTROLLER FOR ACTIVATING SAID DEVICE TO INTERRUPT THE OPERATION OF SAID WORK UNIT; A THIRD CONTROL SWITCH CONNECTED IN A SECOND INPUT CIRCUIT TO SAID CONTROL DEVICE; A THIRD ECCENTRIC OPERATED CYCLICALLY BY SAID ROTATING TURRET PLATE TO CLOSE SAID THIRD CONTROL SWITCH TO COMPLETE SAID SECOND INPUT CIRCUIT TO DELIVER AN ERASE IMPULSE TO SAID CONTROL DEVICE; CIRCUIT MEANS CONNECTING SAID CONTROL DEVICE TO SAID CONTROLLER AND OPERABLE, RESPONSIVE TO A RECEIPT OF AN ERASING PULSE FROM SAID SECOND INPUT CIRCUIT, AND IN THE ABSENCE OF A PULSE FROM SAID FIRST INPUT CIRCUIT PROVIDED BY ACTIVATION OF SAID CHECKING DEVICE RESPONSIVE TO ABSENCE OF A HOLLOW WORKPIECE ON A MANDREL, TO CONDITION SAID CONTROLLER TO OPERATE SAID COUPLING AND BRAKE DEVICE TO RESTART CYCLICAL OPERATION OF SAID APPARATUS.