Feeding device for paper machines

Details Feeding device for paper machines Feeding device for paper machines

1974-07-11

1976-05-04

Bashore, S. Leon

Paper making and fiber liberation

Apparatus

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

162344, 162347, D21F 106

Patent

active

039545580

ABSTRACT:
A feeding device to which a fibrous suspension is supplied by an input manifold includes a passage extending over the entire width of the forming wire to which the suspension is to be fed. The passage may be composed of several sections, any two consecutive sections including with one another an angle which increases in direction from the inlet to the outlet of the passage. The flow-through cross-sectional area of at least one of the sections may decrease in direction of the flow of the suspension, and the inlet cross-sectional area of any downstream section at most equals the outlet cross-sectional area of the preceding section. A microturbulent flow pattern is obtained throughout the passage so that deposition of the fibers on the walls bounding the passage and agglomeration thereof are prevented. The passage may be bounded by two independent portions of the feeding device and the flow-through cross-sectional area of the passage may be varied by changing the relative positions of the portions with attendant variation of the amount of suspension being fed to the wire.

REFERENCES:
patent: 2506678 (1950-05-01), Osgood
patent: 3661702 (1972-05-01), Means
patent: 3769155 (1973-10-01), Schiel
patent: 3846230 (1974-11-01), Wahren et al.
patent: 3853695 (1974-12-01), Back et al.
bratton et al., "The Flow Spreader," The Paper Industry and Paper World, Jan. 1943, pp. 1062, 1064, 1066.

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