Paper making and fiber liberation – Processes and products – Reclamation – salvage or reuse of materials
Patent
1991-06-05
1993-03-23
Hastings, Karen M.
Paper making and fiber liberation
Processes and products
Reclamation, salvage or reuse of materials
162203, 162217, 162264, 162301, 210783, D21F 166, D21F 180
Patent
active
051960907
ABSTRACT:
Method of feeding separate streams of (1) an aqueous dispersion of pulp and (2) white water from a paper making process into a wedge-shaped space between horizontal travelling upper and lower converging wire meshes, applying a siphon means to the upper wire mesh in said zone to form a web of solid fibrous material between the meshes separating the upper wire mesh from the web to leave it supported on the lower wire mesh as the meshes leave the wedge-spaced zone; washing all solids from the wire meshes into a receiving vessel, recycling the contents of the receiving vessel to the paper making process, and recycling the liquid from the white water to the paper making process; and apparatus to perform the above method.
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patent: 3619362 (1971-11-01), Parker
patent: 3716449 (1973-02-01), Gatward et al.
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patent: 4895623 (1990-01-01), Corbellini
Morrison "Efficient Reuse of Process Water" TAPPI Aug. 19, 1943.
Fuller "Screening of Effluents" Tappi Jun. 1973.
Corbellini Glauco
Rodriguez Peter A.
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