GB393824A - Improvements in or relating to the continuous treatment of paper refuse, old paper, wood pulp, cellulose and the like in the preparation of paper pulp - Google Patents

Abstract

393,824. Utilization of waste paper, wood pulp, &c. GREWIN, F., Hallstavik, Sweden. Oct. 3, 1932, No. 27454. Conven. tion date, Oct. 15, 1931. [Class 96.] Waste paper, cardboard, wood pulp, cellulose, and the like which accrues during paper making is thoroughly moistened and mechanically disintegrated continuously with its production. The waste paper is preferably sprayed with water and fed straight into the disintegrating apparatus, which may conveniently be situated in a cellar directly underneath the papermaking machine. The waste paper drops down into the trough A through shoots, the sides of which are sprayed with water, and is beaten by the revolving arms a<3>. A water spray d<3> and adjustable baffle a<4> holds back paper which is still voluminous from the beating vat B containing the beater arms b<2> which rotate between steel plates b<4>. The pulp flows through a sieve b<3>, kept clear by a rotating brush or spiked roller b<5>, into the tank c<1>. Coarse material is returned by the pump D to the trough A by nozzles d<2> or to the vat B by nozzles d4, and fine material overflows into the tank c<2> and is pumped to the paper-making machine above by a pump E controlled by the float el. In a modified form of apparatus for use when space is restricted, the trough A is replaced by an endless conveyer belt.