Device for feeding raw materials to plastic extrusion machines

Claim 1

IN COMBINATION WITH A PLASTIC EXTRUSION MACHINE HAVING AN AUGER MEANS CONNECTED WITH SAID AUGER FROM ROTATING IT AT A SELECTED SPEED; A DEVICE FOR SIMULTANEOUSLY FEEDING MOULDING COMPOUNDS AND DYES TO SAID AUGER, SAID DEVICE COMPRISING A HOPPER HAVING SIDE WALLS ENCLOSING AN UPPER OPENING FOR RECEIVING THE MOULDING COMPOUNDS AND A LOWER OPENING COMMUNICATING WITH SAID AUGER, A CONDUIT FOR FEEDING DYES TO SAID AUGER, SAID CONDUIT BEING LOCATED WITHIN SAID HOPPER AND ATTACHED TO AND EXTENDING ALONG AN INNER SURFACE THEREOF, SAID CONDUIT HAVING AN UPPER OPENING EXTENDING OUTWARDLY THROUGH A SIDE OF SAID HOPPER AND A LOWER OPENING WHICH IS SUBSTANTIALLY IN ALINEMENT WITH THE LOWER OPENING OF SAID HOPPER, A TROUGH HAVING A SNOUT LOCATED ADJACENT THE UPPER OPENING OF SAID CONDUIT FOR FEEDING DYES THERETO, AND MEANS CONNECTED WITH SAID TROUGH FOR VIBRATING SAID TROUGH AT A SELECTED RATE CORRESPONDING TO THE SELECTED SPEED OF SAID AUGER, WHEREBY SELECTED PROPORTIONS OF MOULDING COMPOUNDS AND DYES AND FED BY SAID AUGER.