Mixers

Claim 1

A MIXER COMPRISING TWO MIXING RECEPTACLES, AT LEAST ONE CONVEYING SCREW IN EACH RECEPTACLE, EACH SAID CONVEYING SCREW BEING ROTATABLE ABOUT ITS OWN AXIS TO MOVE MATERIAL WITHIN ITS RECEPTACLE IN THE DIRECTION OF THE LENGTH OF SAID SCREW, A DRIVING ARM FOR EACH SCREW, EACH SAID DRIVING ARM BEING ARRANGED FOR ROTATATION ABOUT AN AXIS SUBSTANTIALLY COINCIDENT WITH THE AXIS OF SYMMETRY OF THE APPROPRIATE RECEPTACLE, A SCREW ARM MOUNTED ON EACH OF SAID DRIVING ARMS ECCENTRIC OF THE AXIS OF ROTATION THEREOF FOR ROTATION ABOUT AXES SUBSTANTIALLY PARALLEL WITH THE AXES OF ROTATION OF SAID DRIVING ARMS, MEANS FOR ROTATING SAID DRIVING ARMS AND SAID SCREW ARMS ABOUT THEIR RESPECTIVE TO THEIR RESPECTIVE SCREW ARMS AT POINTS BEING ARTICULATED TO THEIR RESPECTIVE SCREW ARMS AT POINTS REMOTE FROM THE AXES OF ROTATION THEREOF, WHEREBY AT LEAST THAT PART OF EACH SAID CONVEYING SCREW ARTICULATED TO ITS SCREW ARM WILL FOLLOW A PATH SUBSTANTIALLY WITHIN AND RELATIVE TO ITS RECEPTACLE WITH A MOTION HAVING BOTH A ROTATIONAL COMPONENT ABOUT AND A RADIAL COMPONENT TO AND FROM THE AXIS OF SYMMETRY OF ITS RECEPTACLE, AND MEANS INTERCONNECTING SAID RECEPTACLES WHICH PERMIT MATERIAL MIXED AND DISCHARGED FROM ONE RECEPTACLE TO ENTER SAID SECOND RECEPTACLE FOR FURTHER MIXING.