Invention Grant
- Patent Title: Headbox for a machine for producing a fibrous web
- Patent Title (中): 用于生产纤维网的机器的流浆箱
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Application No.: US13102688Application Date: 2011-05-06
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Publication No.: US08236137B2Publication Date: 2012-08-07
- Inventor: Wolfgang Ruf , Konstantin Fenkl , Markus Häuβler
- Applicant: Wolfgang Ruf , Konstantin Fenkl , Markus Häuβler
- Applicant Address: DE Heidenheim
- Assignee: Voith Patent GmbH
- Current Assignee: Voith Patent GmbH
- Current Assignee Address: DE Heidenheim
- Agency: Taylor IP, P.C.
- Priority: DE102008054896 20081218
- Main IPC: D21F1/18
- IPC: D21F1/18

Abstract:
The invention relates to a headbox which comprises 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 and an opening center line, arriving at different levels and being connected to a common supply channel. The headbox further comprises a downstream turbulence generator having a plurality of flow channels arranged in lines and columns and a headbox nozzle which is directly contiguous to the turbulence generator and which has a nozzle gap. The headbox according to the invention has a system pressure loss which is substantially composed of a first pressure loss between the feed device and the intermediate channel and a second pressure loss in the turbulence generator, the second pressure loss and the first pressure loss being in a ratio ranging from 8:1 to 1:1, preferably from 4:1 to 1:1, particularly from 2:1 to 1:1.
Public/Granted literature
- US20110265968A1 HEADBOX FOR A MACHINE FOR PRODUCING A FIBROUS WEB Public/Granted day:2011-11-03
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