Headbox trailing element

Details Headbox trailing element Headbox trailing element

1985-09-11

1986-10-14

Bashore, S. Leon

Paper making and fiber liberation

Apparatus

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

162336, 162344, D21F 106, D21F 102

Patent

active

046170910

ABSTRACT:
A headbox for delivering stock to a forming surface in a papermaking machine with the headbox having a slice chamber and a slice opening and having trailing elements positioned in the slice chamber extending transversely of the headbox with means anchoring the elements only at their upstream ends with the downstream portion unattached and constructed to be self-positionable so as to be solely responsive to forces exerted thereon by the stock flowing toward the slice with the elements having greater structural stiffness in the cross-machine direction so that the elements offer resistance to deflection in a cross-machine direction by transient pressure variations and offer minimal resistance to deformation of the fluid flow stream for balancing forces on opposite sides of the elements with the elements in one form being laminated with a plurality of anisotropic layers.

REFERENCES:
patent: Re28269 (1974-12-01), Hill et al.
patent: 3843470 (1974-10-01), Betley et al.
patent: 4051289 (1977-09-01), Adamson
patent: 4173670 (1979-11-01), Van Auken
patent: 4566945 (1986-01-01), Ewald et al.

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