Apparatus for eleminating specks from fibrous suspensions, especially in the reprocessing of mixed waste paper

Abstract From the Canadian patent

Apparatus for defibering fibrous suspensions of the type including a horizontal hollow cylinder disposed within a housing, and a rotor coaxial with the cylinder and disposed inside same, the rotor being of the type including at its periphery defibering projections. The stock enters at one axial end of the rotor. The portion of the rotor near the inlet is surrounded by a first annular section of the cylinder. At least the lowermost segment of the first annular section is in the form of a screen. Spaced axially downstream of the inlet section of the rotor is a second section thereof which is provided, with said defibering projections. In a third section disposed axially downstream of the …