D - Textiles – Paper – 21 – F
Patent
D - Textiles, Paper
21
F
D21F 1/02 (2006.01) D21F 1/08 (2006.01)
Patent
CA 2281186
A headbox for a paper machine which mixes suspension and additives to achieve a selected basis weight cross direction profile and fiber orientation cross direction profile in paper produced from the machine. The headbox has sections across its width. Each section is supplied with a first stream Q H of one suspension component, a second stream Q L of a second suspension component. A valve regulates the total suspension flow Q M as well as the ratio between the first and second streams. An additive stream Q ad for each section communicates into the combined suspension flow. A valve regulates the additive stream for achieving the selected profiles. Various places along the suspension flow path are indicated as inlets for the additive stream. The headbox has a microturbulence generator for generating turbulence in the suspension passing through it
Sim & Mcburney
Voith Sulzer Papiertechnik Patent Gmbh
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