Pneumatic stratification with vibratory draw-off

Claim 1

A MACHINE FOR SEPARATING MATERIALS INCLUDING A CHAMBER HAVING SIDE WALLS AND ENCLOSING A DOWNWARDLY SLOPING STATIONARY SCREEN WITH A MINERAL INTAKE ABOVE ITS UPPER END AND A STRATA SEPARATOR AT ITS LOWER END AND A SUPPLY OF PNEUMATIC PRESSURE UPWARDLY THROUGH THE SCREEN FOR ITS FULL LENGTH TO SUSPEND A MINERAL BED OVER THE FULL LENGTH OF THE SCREEN AND CAUSE IT TO FLOW DOWNWARDLY TO STRATIFY THE MATERIALS OF DIFFERENT SPECIFIC GRAVITY, AT LEAST TWO SPACED SCREEN SECTIONS OF SAID SLOPING SCREEN INDEPENDENTLY SUPPORTED FOR VIBRATION AND EACH POSITIONED DOWN SAID SLOPING SCREEN FROM QUIESCENT ZONE SECTIONS OF SAID SLOPING SCREEN AND TO VIBRATE THE UNDER SIDE OF THE PNEUMATICALLY SUSPENDED MINERAL BED AFTER PASSING A QUIESCENT ZONE SECTION OF SCREEN TO DRAW OFF SCREEN SIZED MINERAL PARTICLES OF HEAVY SPECIFIC GRAVITY BEFORE THE LOWER STRATA BECOMES TOO DENSE, SAID INDEPENDENTLY SUSPENDED SCREEN SECTION CONSISTS OF A PAIR OF OPPOSITELY DISPOSED ELASTOMER ISOLATORS MOUNTED IN SOCKETS IN SAID SIDE WALLS, A BAR SUSPENDED BY SAID ELASTOMER ISOLATORS, SAID SPACED INDEPENDENTLY SUSPENDED SCREEN SECTIONS SUPPORTED BY SAID ELASTOMER ISOLATORS INDEPENDENTLY OF SAID SLOPING SCREEN AND FORMING A CONTINUOUS SCREEN SURFACE THEREWITH, AND SAID VIBRATOR MEANS SECURED TO SAID BAR TO RECIPROCATE SAID SCREEN SECTIONS ON SAID ELASTOMER ISOLATORS IN THE DIRECTION OF THE MINERAL BED FLOW.