Food or edible material: processes – compositions – and products – Processes – Molding – casting – or shaping
Patent
1997-05-01
1999-08-17
Yeung, George
Food or edible material: processes, compositions, and products
Processes
Molding, casting, or shaping
426635, 426656, 426661, A23K 100, A23P 100
Patent
active
059391243
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) may include an internal, apertured flow-restricting device (60, 110) which defines a mid-barrel choke point for the material being processed. An alternate extruder (120) is configured without a mid-barrel restriction and is designed to operate at essentially atmospheric internal pressure throughout the majority of the length of barrel (122) with a significant pressure rise in the final head (134) adjacent the extrusion die. Preferably, the barrel (14, 122) has an internal bore of generally frustoconical configuration with an effective length to maximum diameter ratio (L/D) of at least about 6. Novel extrusion processes and products are also provided, using extremely short extrusion barrel retention times to give cooked extrudates having essentially no amino acid or vitamin nutrient losses, and/or dense, highly cooked, low moisture feeds.
REFERENCES:
patent: 3117006 (1964-01-01), Wenger
patent: 4118164 (1978-10-01), Wenger et al.
patent: 4763569 (1988-08-01), Wenger et al.
patent: 5480673 (1996-01-01), Rokey
Wenger Manufacturing Inc.
Yeung George
LandOfFree
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