Plastic pelletizer

Claim 1

AN UNDERWATER PLASTIC PELLETIZER COMPRISING A DIE PLATE SUPPORTING BODY HAVING MEANS DEFINING AN EXTRUSION CAVITY THEREIN INCLUDING AN INLET AND AN OUTLET, AN ANNULAR DIE PLATE ON SAID BODY POSITIONED IN CLOSING RELATION TO SAID OUTLET AND HAVING MEANS THEREIN DEFINING A PLURALITY OF EXTRUSION ORIFICES ARRANGED ANNULARLY THEREON IN COMMUNICATION WITH SAID CAVITY, MEANS FOR CENTRALLY SUPPORTING SAID DIE PLATE INCLUDING A FIXED HOLLOW MANDREL EXTENDING INTO SAID CAVITY AND HAVING AN UPPER END THEREOF SECURED IN SAID BODY AND HAVING A LOWER END THEREOF SECURED IN SUPPORTING RELATION TO SAID DIE PLATE AT AN INSIDE PERIPHERAL PORTION THEREOF INWARDLY OF SAID ORIFICES, SAID MANDREL DEFINING WITH SAID CAVITY AN ANNULAR EXTRUSION PASSAGE LEADING FROM SAID DIE BODY INLET TO SAID OUTLET, A KNIFE DRIVE SHAFT, MEANS ROTATABLY MOUNTING SAID DRIVE SHAFT WITHIN SAID SLEEVE WITH A LOWER END OF SAID DRIVE SHAFT EXTENDING BELOW SAID DIE PLATE, A KNIFE HUB MOUNTED ON THE EXTENDED END OF SAID SHAFT, AND A PLURALITY OF PELLET SEVERING KNIVES FIXED TO SAID HUB AND EXTENDING THEREFROM FOR SWEEPING SAID DIE PLATE AT SAID ORIFICES UPON THE ROTATION ON SAID SHAFT, A PELLET COLLECTING WATER-TIGHT HOUSING SECURED TO SAID DIE BODY OVER SAID DIE PLATE AND HUB HAVING WATER INLET MEANS AND COMBINED WATER AND PELLET OUTLET MEANS, MEANS IN SAID HUB DEFINING A PLURALITY OF WATER PASSAGEWAYS POSITIONED TO RECEIVE WATER FROM SAID INLET WITH AT LEAST ONE SUCH PASSAGEWAY FOR EACH SAID BLADE ARRANGED TO DIRECT WATER BEHIND SAID BLADES TO PREVENT CAVITATION BETWEEN SAID BLADES AND SAID DIE PLATE, AND FURTHER MEANS IN SAID HOUSING FORMING A WATER DISCHARGE OPENING ADJACENT SAID HUB COMMUNICATING WITH SAID HOUSING INLET FOR ADMITTING WATER DIRECTLY INTO THE INTERIOR OF SAID HOUSING.