Processing waste paper or the like

Claim 1

IN A DISC MILL FOR PULPING WASTE PAPER AND OTHER PAPER WASTES COMPRISING TWO COAXIAL CIRCULAR DISCS UPON WHICH ARE FORMED RADIALLY EXTENDING ELEVATIONS WITH ROUNDED LONGITUDINAL EDGES, THE SPACING OF SAID DISCS LEAVING A NARROW GAP BETWEEN SAID OPPOSING ELEVATIONS, THE PROVISION OF MEANS FOR ROTATING AT LEAST ONE OF SAID DISCS IN RELATION TO THE OTHER OF SAID DISCS, MEANS FOR FEEDING THE MATERIAL INTO THE CENTRAL REGION OF THE GAP BETWEEN SAID DISCS, AND SAID DISCS EACH HAVING AN ANNULAR SURFACE DIRECTED TOWARD SAID GAP BETWEEN SAID DISCS AND BEING ADAPTED FOR GENTLY PUSHING AND ROLLING SAID FIBER MATERIAL THROUGH AND BETWEEN SAID GAP, SAID SURFACES BEING OF UNDULAR CROSS SECTION, ALL PORTIONS OF SAID UNDULATED SURFACES BEING SMOOTH AND OF SUCH A KIND THAT EACH ELEVATION IS FREE OF FLAT SURFACE PORTIONS PARALLEL TO THE PLANE OF ROTATION OF THE DISCS, AND HAS A CROWN LINE EXTREMITY FROM WHICH SIDE SURFACES CONTINUALLY INCLINE TOWARD ADJACENT VALLEY LINES.