Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – With washing
Patent
1978-02-27
1979-05-15
Fisher, Richard J.
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
With washing
8156, 68158, 162217, 162351, 162364, 210 77, 210188, 210400, D21C 906
Patent
active
041546440
ABSTRACT:
A horizontal, Fourdrinier foraminous belt type, countercurrent, high-capacity, cellulose pulp washer is described. The described washer is equipped with a hood positioned over a portion of the belt and over vacuum boxes or receptacles under the upper loop of the belt. The gases and vapors drawn into the vacuum boxes or receptacles with the wash liquid are separated from the liquid in the receptacles and recycled to the hood to control the atmosphere in the hood and maintain the desired pressure differential for operation of the washer.
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patent: 3938206 (1976-02-01), Stranger-Johannessen
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Chevis Peter P.
Fisher Richard J.
Georgia-Pacific Corporation
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