Cartoning machine

Claim 1

IN A CARTONING MACHINE INCLUDING FIRST AND SECOND CARRIERS MOUNTED ON A FRAME TO HOLD ROWS OF EQUALLY SPACED AND ALINED ARTICLES AND CARTONS RESPECTIVELY, AND ADVANCE SAID ROWS ALONG SIDE BY SIDE PATHS THROUGH A CARTON LOADING STATION, THE COMBINATION OF, A MAGAZINE FOR HOLDING A STACK OF COLLAPSED CARTONS AND RELEASING THE TERMINAL CARTON IN SAID STACK FOR TRANSFER TO SAID SECOND CARRIER; MECHANISM ON SAID FRAME FOR TRANSFERRING CARTONS FROM SAID MAGAZINE TO SAID SECOND CARRIER AT A TRANSFER STATION ALONG SAID PATHS IN ADVANCE OF SAID LOADING STATION WHILE ERECTING THE CARTONS, SAID TRANSFER MECHANISM INCLUDING AN ARM MOVABLE TOWARD AND AWAY FROM SAID TERMINAL CARTON THROUGH LOADING AND RETURN STROKES, AND AT LEAST ONE SUCTION ELEMENT ON SAID ARM ENGAGEABLE WITH THE TERMINAL CARTON WHEN THE ARM IS NEAR THE BEGINNING OF EACH LOADING STROKE; A VALVE MOVABLE BACK AND FORTH BETWEEN FIRST AND SECOND POSITIONS RELATIVE TO SAID ARM AND OPERABLE IN SAID FIRST POSITION TO APPLY VACUUM TO SAID CUP AND IN SAID SECOND POSITION TO VENT THE CUP; CONTROL MECHANISM FOR ALTERNATING SAID MEMBER BETWEEN SAID POSITIONS IN TIMED RELATION WITH THE ARM MOTION TO APPLY VACUUM TO SAID ELEMENT NEAR THE BEGINNING OF EACH LOADING STROKE AND RELEASE THE VACUUM NEAR THE END OF EACH RETURN STROKE WHEREBY THE ELEMENT GRIPS THE TERMINAL CARTON, PULLS THE SAME AWAY FROM THE STACK AND RELEASES THE CARTON; A DEVICE IN ADVANCE OF SAID TRANSFER STATION FOR SENSING THE ABSENCE OF ARTICLES FROM THE ROW ON SAID FIRST CARRIER AND PRODUCING SIGNALS INDICATING THE ABSENCE OF ARTICLES IN SENSED POSITIONS IN SAID ROW; AND ADDITIONAL CONTROL MECHANISM ACTUATED BY SAID SIGNALS AND OPERABLE WHEN ACTUATED TO MAINTAIN SAID SIGNALS AND OPERABLE WHEN ACTUATED TO MAINTAIN SAID VALVE IN SAID SECOND POSITION DURING A SELECTED LOADING STROKE.