Voith Patent Gmbh

Markus Iläussler

Wolfgang Ruf

Klaus Lehleiter

Konstantin Ferkl

The invention relates to a headbox for a machine for producing a fibrous web, especially a paper or cardboard web, from at least one fiber suspension, comprising a feed device feeding the at least one fiber suspension, a perforated distribution pipe plate arranged immediately downstream thereof and having a plurality of channels arranged in lines and columns, an intermediate channel arranged downstream thereof, extending over the width of the headbox and having a plurality of means for dosing a fluid in partial fluid streams to the at least one fiber suspension in a preferably adjustable/controlled manner, the means being spaced apart from each other in the width direction of the headbox and the individual means comprising a plurality of dosing channels having respective dosing channel openings on the outlet side and a dosing channel length, arriving at different levels and being connected to a common supply channel. The headbox according to the invention is characterized in that the dosing channel length of the dosing channel is 1.5 times longer than the dosing channel opening of the dosing channel on the outlet side and in that the distance of the dosing channel opening of the dosing channel on the outlet side to the turbulence generator ranges from 0 to 50 mm.

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Herbrechtingen, Germany

Markus Iläussler