Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Mechanical defibration in the presence of heated gas or gas...
Patent
1987-05-18
1988-09-20
Lacey, David L.
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Mechanical defibration in the presence of heated gas or gas...
241 28, 2412613, 241297, D21B 114, B02C 712
Patent
active
047723580
ABSTRACT:
Method and appparatus for making pulp of grinding goods, such as fibre material, in the grinding zone of a grinding apparatus by pressing it against a grinding surface provided with a pattern extending in the direction of movement of the grinding goods over the grinding surface for desintegration of the grinding goods. Steam generated during the grinding work causes a pressure rise along the grinding surface. The region for the maximum pressure in the grinding zone is established with the aid of measurements of the pressure course in the grinding zone and the pattern is formed in a predetermined region around this pressure center so that braking of the grinding goods will be obtained.
REFERENCES:
patent: 3040997 (1962-06-01), Borden
patent: 3149792 (1964-09-01), Textor
patent: 3473745 (1969-10-01), Shook, Jr. et al.
patent: 3815834 (1974-06-01), Gilbert
patent: 4039154 (1977-08-01), Peterson
patent: 4090672 (1978-05-01), Ahrel
patent: 4163525 (1979-08-01), Reinhall
Hastings K. M.
Lacey David L.
Munson Eric Y.
Sunds Defibrator AB
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