Patent ID: 7350960

Claim:
In a continuous mixer apparatus adapted for commingling particulate thermoplastic material of varying polymeric compositions, and having a mixer barrel, at least one main rotor with a helical profile body section at one longitudinal end thereof, a driven journal located at an opposite driven end, a drive end rotor plate, a drive end packing seal retainer, and a packing gland seal means at the drive end, the improvement in the main rotor external configuration which comprises: (a) a first upstream/leading feed flight having a plurality of Lowenherz profile threads integral with the outer periphery of the main rotor; and, (b) a second downstream/leading feed flight, abutting the first feed flight and having a plurality of screw-type standard threads, also integral with the outer periphery of the main rotor, which standard threads terminate at an abutting trailing helix flight which is integral with outer periphery of the main rotor.