Short length tapered extrusion cooking device

Details Short length tapered extrusion cooking device Short length tapered extrusion cooking device

1996-07-18

1997-12-09

Alexander, Reginald L.

Foods and beverages: apparatus

Cooking

With stirring

99353, 366 82, 366 88, 366 89, 426516, A23J 100, B29B 742

Patent

active

056948336

ABSTRACT:
Improved short length extrusion cooking devices (10) are provided which can achieve product throughput and quality characteristics of conventional long-barrel extruders. The short length extruders (10) of the invention include a relatively short barrel (14) having an inlet (18) and an endmost extrusion die (20). An elongated, helically flighted axially, rotatable screw assembly (22) is positioned within the barrel (14) and is coupled to motive means (39, 39a) for rotation of the assembly (22) at a speed of at least about 500 rpm. The device (10) includes an internal, apertured flow-restricting device (60, 110) which defines a mid-barrel choke point for the material being processed. Preferably, the barrel (14) has an internal bore of generally frustoconical configuration with an effective length to maximum diameter ratio (L/D) of at least about 6.

REFERENCES:
patent: 3325865 (1967-06-01), Dunnington et al.
patent: 3881708 (1975-05-01), Carle
patent: 4963033 (1990-10-01), Huber et al.
patent: 5490725 (1996-02-01), Behrens et al.

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