Abstract: An extruder machine for processing of plastic materials, rubber or polymers in which a stationary casing is provided with a generally tubular bore having an inlet opening near one end thereof, and a discharge opening at the other end thereof. A generally cylindrical rotor is rotatably mounted in the bore of the casing. The casing is comprised of a pair of generally coaxially aligned spaced apart cylindrical members, having a length substantially longer than their diameters. A heating or a cooling fluid is passed in the spacing between the cylindrical members in a heat transfer relationship. Each pair of cylindrical members is provided with expansion/contraction joints to permit longitudinal expansion or contraction of the components with respect to one another.

Abstract: A mixing machine more particularly for pastes, doughs, slurries or the like has a mixing chamber with a central core, a pair of rotary mixing elements, one for sweeping the surface of the core and the other for sweeping the wall of the chamber and a static pin within the chamber between the mixing elements whereby a product is sheared and divided during mixing.