Process for preparing a web of paper fibers

Details Process for preparing a web of paper fibers Process for preparing a web of paper fibers

1997-06-04

2000-07-18

Hastings, Karen M.

Paper making and fiber liberation

Processes and products

Running or indefinite length work forming and/or treating...

34454, 162207, 162211, 162217, 1623591, D21F 148, D21F 514

Patent

active

060902434

ABSTRACT:
Improved method of removing water from a wet web of paper includes the steps of (a) passing the web and its supporting fabric above and in sliding contact with a surface of a meniscus separator unit having a plurality of spaced cells in contact with the inner surface of the fabric; (b) applying a small vacuum to an internal space of each cell to extract water from the web using the tension meniscus of water while preventing air from passing through the web; and (c) permitting air from the atmosphere only to be applied to the inner surface of the fabric by each cell and thence into the fabric to replace water removed from the fabric in step (b) thereby enhancing the removal of water from the web and from the fabric, the atmospheric air passing along and through the interstices between the inner and outer surfaces of the fabric to the internal space of each cell. The air from step (c) travels in an inclined path from the fabric inner surface toward the direction of fabric travel and thence through the fabric in the latter direction, and the air from step (c) is removed through an inclined path away from the fabric. The fabric may be a Fourdrinier wire fabric, a felt fabric, or other fabric. In most uses a moving surface is located on the outer surface of the wet web of fibers opposite to the meniscus separator unit.

REFERENCES:
patent: 3224928 (1965-12-01), Lee et al.
patent: 3691010 (1972-09-01), Krake
patent: 4302282 (1981-11-01), Young
patent: 4561939 (1985-12-01), Justus
patent: 5064503 (1991-11-01), Tavi
patent: 5393382 (1995-02-01), Corbellini et al.

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