Head box for a paper machine

Details Head box for a paper machine Head box for a paper machine

1987-12-17

1988-11-08

Lacey, David L.

Paper making and fiber liberation

Apparatus

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

162336, 162344, D21F 102

Patent

active

047832410

ABSTRACT:
A head box has a preferably fixed flow-carrying wall (11) and a movable flow-carrying wall (13) defining a nozzle-like stock conduit (14) and an outlet slot (15). The movable wall is provided with an adjustable profile bar (35) at the stock outlet slot. For coarse adjustment of the slot width, two lifting devices (21) act on the movable flow-carrying wall. Fine adjustment of the slot width is performed by adjustment spindles (36) acting on the profile bar.
To improve adjustment of the stock outlet slot by the movable wall and to use the profile bar adjustment to perform very small corrections to the slot width, a front end section (24) of the movable wall located in the region of the stock outlet slot is flexibly constructed with respect to the remaining part of the wall, and a plurality of adjustment units (33) are spaced across the machine width and act on the flexible end section directly in front of the stock outlet slot.
Thereby the movable wall (33) can be adapted with relatively high accuracy to the contour of the fixed wall (11) on the outlet slot side by the adjustment units (33) acting on the flexible end section (24). The immersion depth of the profile bar (35) into the stock conduit is therefore largely constant over the machine width. Cross currents and variable velocities of the stock flow are avoided and the paper's properties are improved.

REFERENCES:
patent: 3043370 (1967-07-01), Ostertag, Jr. et al.
patent: 3628589 (1971-12-01), Means et al.
patent: 4373993 (1983-02-01), Fujiwari
patent: 4406740 (1983-09-01), Brieu
patent: 4551204 (1985-11-01), Holik

Affiliated with

Also associated with

Rating

Head box for a paper machine does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Head box for a paper machine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Head box for a paper machine will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-462625