Process and apparatus for the production of fibrous webs, especially for making paper or cardboard

Claim 1

A METHOD OF PRODUCING FIBROUS WEBS SUCH AS PAPER AND CARDBOARD AND THE LIKE FROM FLOWABLE FIBROUS PULP BY CAUSING FIBERS TO SETTLE FROM THE PULP ON A PERVIOUS SETTING SURFACE WHICH COMPRISES; PLACING THE SETTLING SURFACE IN A PULP CONTAINER WITH AMPLE DISTANCE BETWEEN THE SETTLING SURFACE AND THE BOUNDARY WALL OF THE CONTAINER TO PERMIT FREE MOVEMENT OF THE PULP AND FIBERS RELATIVE TO SAID SETTLING SURFACE, CONTINUOUSLY SUPPLYING PULP TO SAID CONTAINER NEAR THE BOTTOM THEREOF AND CONTINOUSLY OVERFLOWING PULP FROM SAID CONTAINER NEAR THE TOP THEREOF TO KEEP THE PULP IN MOTION IN THE CONTAINER AND PREVENT FLOCCULATION OF FIBERS THEREIN, MAINTAINING A PRESSURE DIFFERENTIAL BETWEEN THE PULP SIDE OF SAID SETTLING SURFACE AND THE OPPOSITE SIDE THEREOF TO CAUSE LIQUID OF THE PULP TO PASS THROUGH SAID SURFACE AND FIBERS OF THE PULP TO SETTLE ON SAID SURFACE, CONTINUING THE DEPOSITION OF FIBERS ON SAID SETTLING SURFACE IN SAID PULP CONTAINER UNTIL THE DESIRED THICKNESS OF FIBROUS LAYER HAS BEEN BUILT UP ON SAID SURFACE, MAINTAINING FIBER POOR LIQUID IN A SECOND CONTAINER COMMUNICATING WITH SAID PULP CONTAINER AT ONE REGION THEREOF SO THERE IS A CONTINUOUS LIQUID PATH BETWEEN SAID CONTAINERS, MOVING THE SAID SURFACE WHEN THE REQUIRED THICKNESS OF FIBROUS LAYER IS BUILT UP THEREON FROM SAID PULP CONTAINER TO SAID SECOND CONTAINER ALONG SAID LIQUID PATH AND WHILE KEEPING THE FIBROUS LAYER BEARING SIDE OF SAID SURFACE IMMERSED IN SAID LIQUID, MAINTAINING A PRESSURE DIFFERENTIAL BETWEEN THE LIQUID SIDE OF SAID SURFACE AND THE OPPOSITE SIDE THEROF IN SAID SECOND CONTAINER TO CAUSE SAID LIQUID IN SAID SECOND CONTAINER TO COMPACT THE FIBROUS LAYER ON SAID SURFACE, MOVING THE SURFACE OUT OF SAID SECOND CONTAINER AND OUT OF SAID LIQUID, AND REMOVING THE COMPACTED FIBROUS LAYER FROM SAID SURFACE WHILE SAID SURFACE IS REMOVED FROM BOTH CONTAINERS.

Claim 2

A METHOD OF PRODUCING FIBROUS WEBS SUCH AS PAPER AND CARDBOARD AND THE LIKE FROM FLOWABLE FIBROUS PULP BY CAUSING FIBERS TO SETTLE FROM THE PULP ON A PERVIOUS SETTING SURFACE WHICH COMPRISES; PLACING THE SETTLING SURFACE IN A PULP CONTAINER WITH AMPLE DISTANCE BETWEEN THE SETTLING SURFACE AND THE BOUNDARY WALL OF THE CONTAINER TO PERMIT FREE MOVEMENT OF THE PULP AND FIBERS RELATIVE TO SAID SETTLING SURFACE, CONTINUOUSLY SUPPLYING PULP TO SAID CONTAINER NEAR THE BOTTOM THEREOF AND CONTINOUSLY OVERFLOWING PULP FROM SAID CONTAINER NEAR THE TOP THEREOF TO KEEP THE PULP IN MOTION IN THE CONTAINER AND PREVENT FLOCCULATION OF FIBERS THEREIN, MAINTAINING A PRESSURE DIFFERENTIAL BETWEEN THE PULP SIDE OF SAID SETTLING SURFACE AND THE OPPOSITE SIDE THEREOF TO CAUSE LIQUID OF THE PULP TO PASS THROUGH SAID SURFACE AND FIBERS OF THE PULP TO SETTLE ON SAID SURFACE, CONTINUING THE DEPOSITION OF FIBERS ON SAID SETTLING SURFACE IN SAID PULP CONTAINER UNTIL THE DESIRED THICKNESS OF FIBROUS LAYER HAS BEEN BUILT UP ON SAID SURFACE, MAINTAINING FIBER POOR LIQUID IN A SECOND CONTAINER COMMUNICATING WITH SAID PULP CONTAINER AT ONE REGION THEREOF SO THERE IS A CONTINUOUS LIQUID PATH BETWEEN SAID CONTAINERS, MOVING THE SAID SURFACE WHEN THE REQUIRED THICKNESS OF FIBROUS LAYER IS BUILT UP THEREON FROM SAID PULP CONTAINER TO SAID SECOND CONTAINER ALONG SAID LIQUID PATH AND WHILE KEEPING THE FIBROUS LAYER BEARING SIDE OF SAID SURFACE IMMERSED IN SAID LIQUID, MAINTAINING A PRESSURE DIFFERENTIAL BETWEEN THE LIQUID SIDE OF SAID SURFACE AND THE OPPOSITE SIDE THEROF IN SAID SECOND CONTAINER TO CAUSE SAID LIQUID IN SAID SECOND CONTAINER TO COMPACT THE FIBROUS LAYER ON SAID SURFACE, MOVING THE SURFACE OUT OF SAID SECOND CONTAINER AND OUT OF SAID LIQUID, AND REMOVING THE COMPACTED FIBROUS LAYER FROM SAID SURFACE WHILE SAID SURFACE IS REMOVED FROM BOTH CONTAINERS.