Method and apparatus for enveloping granular and/or short fibred substances in coatings of other substances, preferably in thin films of synthetic plastic substances

Claim 1

AN APPARATUS FOR ENVELOPING THE PARTICLES OF GRANULAR MATERIALS AND FIBROUS MATERIALS WITH COATINGS OF OTHER SUBSTANCES, STARTING WITH A SOLUTION OF THE COATING SUBSTANCES, REMOVING THE SOLVENT FROM THE MIXTURE, AND MAINTAINING THE STRUCTURE OF THE GRANULAR AND FIBOUS MATERIALS, COMPRISING, IN COMBINATION, A MIXING DRUM WHICH IS MOUNTED SUBSTANTIALLY HORIZONTALLY, AT LEAST ONE COAXIALLY ARRANGED ROTATABLE SHAFT EXTENDING THROUGH SAID MIXING DRUM, CARRIER ARMS ARRANGED HELICALLY ON SAID SHAFT AND AT RIGHT ANGLES THERETO, PLOUGHSHARE-LIKE MIXING MEMBERS WHICH ARE MOUNTED ON THE ENDS OF SAID CARRIER ARMS AND EXTEND CLOSE TO THE DRUM WALL, FRICTION MEMBERS WHICH ARE MOUNTED ON THE INNER WALL OF SAID MIXING DRUM PARALLEL TO THE DIRECTION OF MOVEMENT OF SAID MIXING MEMBERS BETWEEN EACH TWO MIXING MEMBERS AND WHICH COOPERATE WITH THE LATERAL FACES OF THE MIXING MEMBERS, A DRIVE MEANS FOR SAID SHAFT WHICH MOVES SAID MIXING MEMBERS AT A PERIPHERAL SPEED OF ABOUT 2.5 TO 6 METRES PER SECOND, A FEED APERTURE IN THE UPPER PORTION OF SAID MIXING DRUM, MEANS FOR FEEDING THE SOLUTION OF THE COATING SUBSTANCE INTO THE MIXING DRUM, AND A CLOSABLE DISCHARGE APERTURE IN THE LOWER PORTION OF SAID MIXING DRUM, AT LEAST ONE AIRINJECTION APERTURE WHICH IS MOUNTED ABOVE SAID SHAFT AT THE SIDE OF SAID MIXING DRUM PAST WHICH APERTURE SAID MIXING MEMBERS TRAVEL DOWNWARDS, A VENTILATING SHAFT ON THE UPPER PART OF SAID MIXING DRUM CONNECTING THEREWITH, KNIFE-LIKE CUTTING MEMBERS WHICH RUN INTHE DIRECTION OF MOVEMENT OF SAID CARRIER ARMS AND WHICH ARE MOUNTED ON SAID ARMS CLOSE TO SAID MIXING MEMBERS AND BETWEEN THE SAME AND SAID SHAFT EXTENDING THROUGH THE MIXING DRUM, AND DIVIDING AND DEFLECTING RODS WHICH ARE MOUNTED BELOW SAID VENTILATING SHAFT BETWEEN EACH TWO MIXING MEMBERS AND WHICH DIVIDE UP THE MATERIAL BEING MIXED DURING ITS MOVEMENT, REMOVE IT FROM THE DRUM WALL AND DEFLECT IT TOWARDS THE SHAFT EXTENDING THROUGH THE MIXING DRUM.

Claim 2

AN APPARATUS FOR ENVELOPING THE PARTICLES OF GRANULAR MATERIALS AND FIBROUS MATERIALS WITH COATINGS OF OTHER SUBSTANCES, STARTING WITH A SOLUTION OF THE COATING SUBSTANCES, REMOVING THE SOLVENT FROM THE MIXTURE, AND MAINTAINING THE STRUCTURE OF THE GRANULAR AND FIBOUS MATERIALS, COMPRISING, IN COMBINATION, A MIXING DRUM WHICH IS MOUNTED SUBSTANTIALLY HORIZONTALLY, AT LEAST ONE COAXIALLY ARRANGED ROTATABLE SHAFT EXTENDING THROUGH SAID MIXING DRUM, CARRIER ARMS ARRANGED HELICALLY ON SAID SHAFT AND AT RIGHT ANGLES THERETO, PLOUGHSHARE-LIKE MIXING MEMBERS WHICH ARE MOUNTED ON THE ENDS OF SAID CARRIER ARMS AND EXTEND CLOSE TO THE DRUM WALL, FRICTION MEMBERS WHICH ARE MOUNTED ON THE INNER WALL OF SAID MIXING DRUM PARALLEL TO THE DIRECTION OF MOVEMENT OF SAID MIXING MEMBERS BETWEEN EACH TWO MIXING MEMBERS AND WHICH COOPERATE WITH THE LATERAL FACES OF THE MIXING MEMBERS, A DRIVE MEANS FOR SAID SHAFT WHICH MOVES SAID MIXING MEMBERS AT A PERIPHERAL SPEED OF ABOUT 2.5 TO 6 METRES PER SECOND, A FEED APERTURE IN THE UPPER PORTION OF SAID MIXING DRUM, MEANS FOR FEEDING THE SOLUTION OF THE COATING SUBSTANCE INTO THE MIXING DRUM, AND A CLOSABLE DISCHARGE APERTURE IN THE LOWER PORTION OF SAID MIXING DRUM, AT LEAST ONE AIRINJECTION APERTURE WHICH IS MOUNTED ABOVE SAID SHAFT AT THE SIDE OF SAID MIXING DRUM PAST WHICH APERTURE SAID MIXING MEMBERS TRAVEL DOWNWARDS, A VENTILATING SHAFT ON THE UPPER PART OF SAID MIXING DRUM CONNECTING THEREWITH, KNIFE-LIKE CUTTING MEMBERS WHICH RUN INTHE DIRECTION OF MOVEMENT OF SAID CARRIER ARMS AND WHICH ARE MOUNTED ON SAID ARMS CLOSE TO SAID MIXING MEMBERS AND BETWEEN THE SAME AND SAID SHAFT EXTENDING THROUGH THE MIXING DRUM, AND DIVIDING AND DEFLECTING RODS WHICH ARE MOUNTED BELOW SAID VENTILATING SHAFT BETWEEN EACH TWO MIXING MEMBERS AND WHICH DIVIDE UP THE MATERIAL BEING MIXED DURING ITS MOVEMENT, REMOVE IT FROM THE DRUM WALL AND DEFLECT IT TOWARDS THE SHAFT EXTENDING THROUGH THE MIXING DRUM.