Patent ID: 7469629

Claim:
Homogenizing and kneading mixer comprising a premixer ( 12 ) placed upstream from a kneader having at least two kneading screws ( 20 , 21 ) connected to a vacuum tank ( 37 ) feeding final compression screws ( 44 ), in which said kneader has a containment cylinder ( 19 a , 19 b ) and respective kneading screws ( 20 , 21 ) having different diameters, a first portion of said kneading screws having a smaller diameter ( 19 a , 20 a , 21 a ) are arranged at a pasta scrap feeding conduit ( 25 ) and a second portion of said kneading screws having a greater diameter ( 19 b , 20 b , 21 b ) are arranged at said premixer ( 12 ) which is provided with paddles ( 14 ) arranged on said premixer ( 12 ) which when rotated have a trajectory which is tangent to spirals on said second portion of said kneading screws of greater diameter ( 20 b , 21 b ) of said kneading screws ( 20 , 21 ).