Headbox with variable eddy decay length

Details Headbox with variable eddy decay length Headbox with variable eddy decay length

1974-02-28

1976-08-03

Bashore, S. Leon

Paper making and fiber liberation

Apparatus

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

162346, 162347, D21F 106

Patent

active

039727718

ABSTRACT:
A paper machine headbox in which the ideal distance or eddy decay length may be varied to provide improved formation and tensile ratio for different grades and types of paper. The slice for the headbox is defined by a pivotally mounted nozzle blade and an apron blade, and one of the blades is mounted for sliding movement toward and away from the other. With this construction, the effective flow area through the flow channel to the slice may be varied, thereby varying the velocity of the paper making stock delivered to the slice and the ideal distance or eddy decay length.

REFERENCES:
patent: 3328237 (1967-06-01), Notbohm
patent: 3578558 (1971-05-01), McCarrick et al.
patent: 3578560 (1971-05-01), Notbohm et al.
patent: 3661706 (1972-05-01), De Noyer
patent: 3730831 (1973-05-01), Stevens
patent: 3734822 (1973-05-01), Bennett et al.
patent: 3837999 (1974-09-01), Chung
patent: 3843470 (1974-10-01), Betley et al.
patent: 3853695 (1974-12-01), Back et al.

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