Mixing apparatus for the mixing of a bleaching agent into cellulosic pulp

Claim 1

APPARATUS FOR MIXING BLEACHING AGENT INTO CELLULOSIC PULP, PARTICULARLY PULP OF HIGH CONSISTENCY, WHICH COMPRISES A CASING, AGITATING MEANS INCLUDING A ROTATABLE SHAFT WITH MIXING VANES MOUNTED THEREON AND POSITIONED WITHIN SAID CASING, A STATIONARY, RADIALLY POSITIONED INLET FOR SUPPLYING BLEACHING AGENT TO SAID CASING LOCATED ADJACENT SAID AGITATING MEANS, SAID CASING INCLUDING AN END WALL TRANSVERSE TO SAID SHAFT AND HAVING AN OPENING THEREIN FOR SUPPLY OF PULP TO SAID CASING, SAID END WALL HAVING UPON IT A HELICAL SURFACE WHICH EXTENDS SUBSTANTIALLY A COMPLETE REVOLUTION AROUND THE SHAFT OF THE AGITATING MEANS, AND A SUPPLY CONDUIT CONNECTED TO SAID END WALL ECCENTRICALLY TO SAID SHAFT AND COMMUNICATING WITH SAID END WALL OPENING, SAID MIXING VANES BEING POSITIONED TO SWEEP OVER SAID OPENING AND CARRY PULP SUPPLIED THERETHROUGH IN A CIRCULAR PATH ALONG THE HELICAL SURFACE FORMED UPON THE END WALL WHEREBY BLEACHING AGENT FROM SAID INLET IS DISTRIBUTED INTO SAID PULP AND THE LATTER IS ADVANCED AXIALLY.