Process and apparatus for forming particulate layers

Details Process and apparatus for forming particulate layers Process and apparatus for forming particulate layers

1988-05-25

1990-07-31

Chin, Peter

Paper making and fiber liberation

Processes and products

Pore forming in situ

162190, 162210, 162264, 162336, 162339, 162363, 162364, D21F 100, D21F 148, D21F 166

Patent

active

049448439

ABSTRACT:
A layer of particulate material is formed by forming a foamed dispersion of a particulate material, supplying the foamed dispersion to a predetermined zone of a plane through which a foraminous element is moving, applying a vacuum to said plane across the zone on the other side of the foraminous element, so as to drain foam and form a particulate layer thereon, removing any free air from the drained foam, and continuously recycling the resulting foam for re-use in forming the foamed particulate dispersion. An apparatus is provided for carrying out the process.

REFERENCES:
patent: 2893486 (1959-07-01), Marti
patent: 3631982 (1972-01-01), Lejeune
patent: 3801436 (1974-04-01), Prechtel

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