Core cleanup and blast machine

Claim 1

A UNIT MACHINE FOR SEQUENTIALLY KNOCKING OUT HARD TO DISLODGE CORES FROM CASTINGS AND THEN FINISH-CLEANING THE SAME, SAID MACHINE COMPRISING, A CASTING RECEIVING DEVICE ADAPTED TO TUMBLE THE CASTING, A BLAST DEVICE ARRANGED TO THROW BLAST MEDIA AT THE CASTING AS IT IS TUMBLED, A FEEDER DELIVERING BLAST MEDIA TO SAID BLAST DEVICE, A SEPARATOR HAVING AN INTAKE RECEIVING DEBRIS AND SPENT MEDIA FALLING AWAY FROM SAID CASTING, SAID SEPARATOR HAVING A DEBRIS DISCHARGE AND A REUSABLE MEDIA DISCHARGE SEPARATE THEREFROM, SAID REUSABLE MEDIA DISCHARGE NORMALLY DELIVERING TO SAID FEEDER, A BY-PASS CONVEYOR PROVIDING A RETURN LINK BETWEEN SAID MEDIA DISCHARGE AND SAID SEPARATOR INTAKE, A FIRST VALVE CONTROLLING PASSAGE THROUGH SAID BY-PASS CONVEYOR, A SECOND VALVE CONTROLLING PASSAGE THROUGH SAID FEEDER, AND CONTROL MEANS OPERABLE TO SEQUENTIALLY CONTROL SAID VALVES SO AS TO INITIALLY BLOCK PASSAGE OF MEDIA THROUGH SAID FEEDER WHILE CIRCULATING ALL MATERIAL FALLING AWAY FROM SAID CASTING THROUGH SAID SEPARATOR AND SUBSEQUENTLY CYCLING THE REUSABLE MEDIA THEREFROM THROUGH SAID FEEDER AND SAID BLAST DEVICE AGAINST SAID CASTING.