Rotors for mixing, pulverising and like machines

Claim 1

A ROTOR FOR USE IN A COMMINUTING OR MIXING APPARATUS COMPRISING A HUB SECTION AND A PLATE SECTION RIGID WITH SAID HUB SECTION, A DRIVE SHAFT MOUNTING SAID HUB SECTION FOR ROTATION ABOUT A SUBSTANTIALLY HORIZONTAL AXIS, SAID PLATE SECTION EXTENDING SUBSTANTIALLY HORIZONTALLY AND HAVING A SMOOTH TOP FACE AND DEFINING WITH SAID HUB SECTION AN IMPERFORATE SURFACE FOR SUPPORTING THE MATERIAL TO BE WORKED ON, AT LEAST TWO RADIALLY DISPOSED BLADES RIGID WITH SAID PLATE SECTION AND PROJECTING DOWNWARDLY FROM THE UNDER SURFACE OF SAID PLATE SECTION TO EXTEND ENTIRELY BELOW SAID PLATE SECTION, EACH OF SAID BLADES HAVING A LEADING MATERIAL ENGAGING SURFACE AND A TRAILING SURFACE FACING IN THE OPPOSITE DIRECTION FROM SAID LEADING CONTINUOUS AND IRREGULARLY SHAPED SUCH THAT A SUBSTANTIAL PORTION OF THE LEADING SURFACE OF EACH BLADE EXTENDS BEYOND THE ADJACENT PERIPHERY OF SAID PLATE SECTION EXTENDING CIRCUMFERENTIALLY FORWARDLY OF THE BLADE IN THE DIRECTION OF ROTATION AND A REDUCED PORTION OF THE TRAILING SURFACE OF EACH BLADE WHICH IS SUBSTANTIALLY LESS THAN SAID SUBSTANTIAL LEADING SURFACE PORTION EXTENDS BEYOND THE ADJACENT PERIPHERY OF SAID PLATE SECTION EXTENDING CIRCUMFERENTIALLY REARWARDLY OF EACH BLADE.