Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – With classifying – separating or screening of pulp
Patent
1983-02-17
1984-08-21
Alvo, Steve
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
With classifying, separating or screening of pulp
209143, 209144, 209250, D21C 518, D21C 520
Patent
active
044668627
ABSTRACT:
Apparatus and method for use in making non-woven fabrics by wet-laying an aqueous dispersion. The apparatus and method screens, separates and remover fiber defects and foreign matter above a prescribed size from other dispersion fibers. The apparatus includes a housing having an inlet and several outlets, an accelerator within the housing for creating relative movement between the dispersion fluid and fibers to axially align at least some of the fibers in the direction of dispersion flow to disperse those fibers in the dispersion and a separator within the housing for separating bundles and lumps above a prescribed size from other dispersion fibers. The housing discharges the bundles and lumps above the prescribed size from the process at one outlet, and passes the other dispersion fibers through to another outlet for use in the wet-laying process. The method includes the steps of producing a stream of dispersion, directing the stream over a curvilinear path, creating relative movement between the dispersion fibers and fluid to axially align at least some of the fibers in the direction of dispersion flow, screening fiber bundles and lumps above a prescribed size from other dispersion fibers by intercepting the stream along a curvilinear path at a lateral stream boundary and washing accumulated fiber bundles and lumps above the prescribed size from the screen for discharge from the process and passing the other dispersion fibers for use in the wet-laying process.
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Angelini Peter
Ring Michael
Alvo Steve
International Paper Company
Zielinski Walt Thomas
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