Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Waste paper or textile waste
Patent
1991-07-08
1992-07-28
Hastings, Karen M.
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Waste paper or textile waste
162 55, 162 6, 209 17, D21C 502
Patent
active
051338327
ABSTRACT:
In apparatus and methods for preparing deinked paper making stock, the initially pulped and cleaned stock is fractionated by filtering through a continuously moving mesh belt of a predetermined mesh size which will retain substantially all of the fibers of greater than a predetermined length as a first suspension fraction and a second suspension fraction comprising the majority of the liquid component of the feed suspension along with small contaminant particles and the remaining fines. These two fractions are then treated separately by bleaching the first fraction and recovering the fines from the second fraction, after which the fines and the first fraction are recombined for further treatment and use.
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Hastings Karen M.
The Black Clawson Company
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