Jet velocity vector profile measurement and control

Details Jet velocity vector profile measurement and control Jet velocity vector profile measurement and control

2008-07-15

2008-07-15

Hug, Eric (Department: 1791)

Paper making and fiber liberation

Processes and products

With measuring, inspecting and/or testing

C162S259000, C162S263000, C162SDIG011, C700S129000

Reexamination Certificate

active

07399380

ABSTRACT:
In a papermaking system having a headbox to dispense a jet of liquid and paper forming fibers, an improvement comprising at least one sensor arrangement for simultaneously or sequentially measuring in at least one location the jet velocity or jet flow correlation of the jet at plural known angles relative to the machine direction. The measured data is analyzed to generate a velocity vector profile or velocity direction profile of the jet, and hence to determine the profile of fiber orientation angles laid down in the sheet formed of the jet.

REFERENCES:
patent: 3-45795 (1991-02-01), None
patent: 2000-144597 (2000-05-01), None
patent: WO 01/53603 (2001-07-01), None

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