APPARATUS FOR PULPING AND DEINKING

摘要

Apparatus for recycling office waste paper and the like of the type having ink and laser print particles coated thereon. The apparatus (200) includes two screw shafts (212, 214) disposed in substantially parallel relationship within a housing having interconnected side walls (202, 204, 206, 208) attached to an underlying bottom wall (210). Each screw shaft (212, 214) includes two frustoconically-shaped sectors (228, 230 and 234, 236, respectively) with radially extending screw flights (240, 242 and 244, 246, respectively) wherein the flights of each screw shaft have opposite pitch to each other. One screw shaft tapers from a large diameter at the ends to a smaller diameter at the midpoint while the other screw shaft tapers from a small diameter at the ends to a larger diameter at the midpoint. The bottom wall has frustoconically-shaped sections corresponding to the overlying screw shaft sectors.