Attrition pulper having high level thrust for grinding pulp and

Details Attrition pulper having high level thrust for grinding pulp and Attrition pulper having high level thrust for grinding pulp and

1974-06-21

1976-03-30

Custer, Jr., Granville Y.

Solid material comminution or disintegration

Processes

With application of fluid or lubricant material

241 28, B02C 2326

Patent

active

039469514

ABSTRACT:
A vortical circulation type pulper has a bladed rotor and stator with a fixed clearance and operates at conventional horsepower to defibre conventional pulp, capable of being defibered, until the fibres are separated. With unconventional pulp, hemp, flax, rags, leather, and certain rejects, which cannot be so defibered, the rotor of the pulper of this invention is advanced to zero clearance and the horsepower increased about fifty percent, the resultant thrust grinding the mass of pulp, and then fibrillating the fibres in the pulper to a desired degree of refining. The rotor then backs off and the refined pulp is dumped from the pulper. An automatic freeness tester senses the condition of the pulp and actuates the electric control circuit.

REFERENCES:
patent: 2596586 (1952-05-01), Morden
patent: 2685826 (1954-08-01), Black
patent: 3073535 (1963-01-01), Vokes
patent: 3428261 (1969-02-01), Moulton

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