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United States Patent 5363747
Douris , ê et al. November 15, 1994

Processing vessel having discharge metering/mixing auger

Clark , Ê et al. November 15, 1994

Abstract

Apparatus for preparing a product by the controlled metering of additive constituents into a base constituent includes a processing vessel having mixing and heating and/or cooling capability to produce a base constituent for discharge into the metering stage of a metering/mixing auger assembly. The metering stage of the auger assembly includes a screw type auger surrounded by a heating or cooling jacket and is operative to convey product from the processing vessel at a uniform rate to an auger mixing stage wherein the auger has increased pitch and is exposed to an open trough through which one or more additive constituents can be metered into the base constituent for mixing therewith. The auger mixing stage accommodates expansion of the mixed constituents. The metering/mixing auger and trough assembly may be readily disassembled for cleaning without need for tools.