Multi-layer headbox

Details Multi-layer headbox Multi-layer headbox

1994-10-24

1996-10-29

Czaja, Donald E.

Paper making and fiber liberation

Apparatus

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

162344, 162336, D21F 102

Patent

active

055693601

ABSTRACT:
A multi-layer headbox including at least two inlet headers for stock through which separate stocks are passed into a system of distributor pipes and further through a turbulence generator into a slice cone narrowing in the stock flow direction. Flaps are placed in the slice cone and one end of the flaps is attached to the turbulence generator. The flaps have at least two flap faces between which a step is formed. The step is arranged on the flap in an area in which the flap, and the flow duct, is curved and its the function is to dissipate any secondary vortices that might form on the curved flap face.

REFERENCES:
patent: 3607625 (1971-09-01), Hill et al.
patent: 3853697 (1974-12-01), Parker et al.
patent: 4181568 (1980-01-01), Pfaler
patent: 4543162 (1985-09-01), Hildebrand
patent: 4617091 (1986-10-01), Rodal et al.
patent: 5110416 (1992-05-01), Linsuri et al.

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