Headbox having a primary stock flow and a laterally injected sec

Details Headbox having a primary stock flow and a laterally injected sec Headbox having a primary stock flow and a laterally injected sec

1989-02-27

1992-09-22

Hastings, Karen M.

Paper making and fiber liberation

Apparatus

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

162216, 162343, D21F 102

Patent

active

051494027

ABSTRACT:
A headbox is disclosed for ejecting stock onto a forming wire of a papermaking machine. The headbox includes an upper, lower, first and second side wall, with each of the side walls extending between the upper and the lower walls such that the upper, lower and side walls define therebetween a slice chamber for the passage therethrough of a primary flow of the stock. A secondary flow of stock is injected laterally relative to the primary flow such that the secondary flow extends through the side walls for controlling fiber orientation along the lateral side edges of the stock ejected from the headbox onto the forming wire.

REFERENCES:
patent: 2904461 (1959-09-01), Washburn et al.
patent: 2956623 (1960-10-01), Ikavalko
patent: 3493463 (1970-02-01), Baker
patent: 3853695 (1974-10-01), Back et al.
patent: 3888729 (1975-06-01), Parker et al.
patent: 3902961 (1975-09-01), Roerig et al.
patent: 4285767 (1981-08-01), Page
patent: 4687548 (1987-08-01), Ilmoriemi et al.
patent: 4898643 (1990-02-01), Weisshuhn

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