Apparatus for making thermoplastic tiles with color effects

Claim 1

APPARATUS FOR EXTRUDING POLYVINYLCHLORIDE OR OTHER THERMOPLASTIC MATERIAL COMPRISING AN EXTRUDER WORM, A DIE HOUSING, AN EXTRUSION DIE HAVING AN ELONGATED SLOT, SAID DIE BEING SECURED IN ONE SIDE OF SAID DIE HOUSING, THE OPPOSITE SIDE OF SAID DIE HOUSING BEING SECURED TO SAID EXTRUDER WORM, MEANS FORMING A PASSAGEWAY THROUGH SAID DIE HOUSING AND COMMUNICATING BETWEEN SAID WORM AND SAID DIE, A SCREW MOUNTED IN SAID PASSAGEWAY ADJACENT SAID WORM, MEANS FOR ROTATING THE SCREW, A SHAFT MOUNTED IN SAID PASSAGEWAY ADJACENT SAID DIE, MEANS IN THE CONDUIT BETWEEN SAID SCREW AND SAID SHAFT FOR DIVIDING SAID MATERIAL INTO A PLURALITY OF STREAMS, AND MEANS FOR ROTATING SAID SHAFT, SAID SHAFT HAVING A PLURALITY OF PLANE SURFACES THEREON, SAID SCREW AND SAID SHAFT BEING SUBSTANTIALLY PARALLEL TO SAID SLOT.