Multi-layer tablet making machines

Claim 1

A MULTI-LAYER TABLET MAKING MACHINE COMPRISING, A ROTARY DIE TABLE HAVING A PLURALITY OF DIES SPACED THEREAROUND AND HAVING AN UPPER AND LOWER PUNCH ASSOCIATED WITH EACH DIE, A PLURALITY OF POWDER FEEDING STATIONS PAST WHICH THE DIES ARE MOVED UPON ROTATION OF THE DIE TABLE TO FEED SUCCESSIVE POWDER FILLS TO EACH DIE, MEANS FOR CONTROLLING THE POSITIONS OF THE UPPER AND LOWER PUNCHES IN THEIR DIES AS THE DIE TABLE ROTATES SO AS TO RAISE EACH UPPER PUNCH AS ITS DIE REACHES EACH POWDER FEEDING STATION, SAMPLING MEANS FOR SAMPLING ANY OF THE SUCCESSIVE POWDER FILLS, AND ADJUSTABLE COMPRESSION MEANS FOR CAUSING A LIGHT COMPRESSION OF A POWDER FILL BETWEEN A DIE AND ITS CORRESPONDING PUNCH IN SAID DIE TABLE AT A LOCATION BETWEEN SAID POWDER FEEDING STATIONS AND THEIR CORRESPONDING SAMPLING MEANS IN RESPONSE TO THE CONDITION OF SAID CORRESPONDING SAMPLING MEANS DURING NORMAL MACHINE OPERATION WHEN SAID CORRESPONDING SAMPLING MEANS IS INOPERATIVE AND WHEN SAID SAMPLING MEANS IS IN AN OPERATIVE CONDITION FOR EFFECTING A STRONGER COMPRESSION OF THE POWDER FILL SUFFICIENT TO ENSURE THE INTEGRITY THEREOF PRIOR TO ITS EJECTION FROM THE RESPECTIVE DIE.