Method and apparatus for grinding chips into paper pulp

Details Method and apparatus for grinding chips into paper pulp Method and apparatus for grinding chips into paper pulp

1976-07-27

1978-05-09

Fisher, Richard V.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Continuous chemical treatment or continuous charging or...

162 23, 162 24, 162 28, 162236, 162242, 241 17, 241 18, 241 28, 241 42, 241251, D21B 116, D21B 134, D21C 324

Patent

active

040885283

ABSTRACT:
In the continuous production of paper pulp from ligno-cellulose raw material, the raw material is subjected to grinding and/or delignification by passing it in the form of small pieces between interpenetrating helicoidal surfaces driven synchronously in rotation inside a casing. The pitch of the helicoidal surfaces is arranged to provide at least one supply zone in which the material is driven downstream by rotation of the surfaces and at least one braking zone in which the material is braked.

REFERENCES:
patent: 484056 (1892-10-01), Simonet
patent: 1419847 (1922-06-01), Hamilton
patent: 1579461 (1926-04-01), Winestock
patent: 3064908 (1962-11-01), Hjelte
patent: 3533563 (1970-10-01), Eriksson
patent: 3773610 (1973-11-01), Shouvlin et al.

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