EP1033436A3 - Method and device for addition of a fluid medium in the suspension flow in a headbox - Google Patents

Method and device for addition of a fluid medium in the suspension flow in a headbox Download PDF

Info

Publication number
EP1033436A3
EP1033436A3 EP99118683A EP99118683A EP1033436A3 EP 1033436 A3 EP1033436 A3 EP 1033436A3 EP 99118683 A EP99118683 A EP 99118683A EP 99118683 A EP99118683 A EP 99118683A EP 1033436 A3 EP1033436 A3 EP 1033436A3
Authority
EP
European Patent Office
Prior art keywords
channel
dosing
feed
entry
fluid medium
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP99118683A
Other languages
German (de)
French (fr)
Other versions
EP1033436B1 (en
EP1033436A2 (en
Inventor
Wolfgang Ruf
Hans Loser
Klaus Lehleiter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Voith Patent GmbH
Original Assignee
Voith Paper Patent GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7899314&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1033436(A3) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Voith Paper Patent GmbH filed Critical Voith Paper Patent GmbH
Publication of EP1033436A2 publication Critical patent/EP1033436A2/en
Publication of EP1033436A3 publication Critical patent/EP1033436A3/en
Application granted granted Critical
Publication of EP1033436B1 publication Critical patent/EP1033436B1/en
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/02—Head boxes of Fourdrinier machines
    • D21F1/022—Means for injecting material into flow within the headbox
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/02—Head boxes of Fourdrinier machines
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/02—Head boxes of Fourdrinier machines
    • D21F1/026—Details of the turbulence section
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/06—Regulating pulp flow
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/08—Regulating consistency

Abstract

To deliver a dosed feed of a fluid medium into the turbulence channels of a stock inlet, at a papermaking machine, at least 50% of the total pressure loss is generated in the turbulence channel downstream of the dosing by stepped changes (5,7,8,9) in the channel cross section. The dosed feed (3) is between the channel entry and outlet, in at least one channel (1). An Independent claim is included for a papermaking machine stock inlet where a part of the flow resistance in at least one channel, after the dosing point, is at least 50% or 50-60% and maximum 75% of the total channel resistance. Preferred Features: The entry into at least one channel with a dosing feed has at least one chamfer (4) with a depth (t) of 2-10 mm and preferably 4-6 mm, and with a chamfer angle ( alpha ) of 20-80 degrees . At least one channel with a dosing feed has an entry with a venturi jet contour. At least one channel with a dosing feed has a corrugated contour downstream of the dosing feed point. All the channels preferably have a dosing feed point, distributed evenly across the machine width.
EP99118683A 1999-03-02 1999-09-22 Method and device for addition of a fluid medium in the suspension flow in a headbox Revoked EP1033436B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19908898A DE19908898A1 (en) 1999-03-02 1999-03-02 Process for metering a fluid medium into a suspension stream of a headbox and headbox
DE19908898 1999-03-02

Publications (3)

Publication Number Publication Date
EP1033436A2 EP1033436A2 (en) 2000-09-06
EP1033436A3 true EP1033436A3 (en) 2001-03-21
EP1033436B1 EP1033436B1 (en) 2006-01-11

Family

ID=7899314

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99118683A Revoked EP1033436B1 (en) 1999-03-02 1999-09-22 Method and device for addition of a fluid medium in the suspension flow in a headbox

Country Status (4)

Country Link
US (2) US6464837B1 (en)
EP (1) EP1033436B1 (en)
AT (1) ATE315681T1 (en)
DE (2) DE19908898A1 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2367564B (en) * 2000-10-04 2004-02-18 Sandusky Walmsley Ltd Method of and apparatus for distribution of paper stock in paper or board making machinery
DE10208610B4 (en) * 2002-02-27 2014-03-06 Voith Patent Gmbh Method for distributing a pulp suspension in the headbox of a paper or board machine and headbox
DE102004055919A1 (en) * 2004-11-19 2006-05-24 Voith Paper Patent Gmbh headbox
US20060173313A1 (en) * 2005-01-27 2006-08-03 Siemens Medical Solutions Usa, Inc. Coherence factor adaptive ultrasound imaging
US8914725B2 (en) 2007-04-11 2014-12-16 Gvbb Holdings S.A.R.L. Method and apparatus for enhancing digital video effects (DVE)
WO2011088888A2 (en) 2010-01-19 2011-07-28 Metso Paper, Inc. Low energy head box
DE102010030352A1 (en) * 2010-06-22 2011-12-22 Voith Patent Gmbh Headbox for a machine for producing a fibrous web
US8871059B2 (en) * 2012-02-16 2014-10-28 International Paper Company Methods and apparatus for forming fluff pulp sheets
DE102012013286B4 (en) 2012-07-05 2016-06-30 Rail.One Gmbh Device for fastening a rail to a support

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0635599A1 (en) * 1993-07-01 1995-01-25 Valmet Paper Machinery Inc. Method and device in the regulation of the headbox
DE19632673A1 (en) * 1996-08-14 1998-02-19 Voith Sulzer Papiermasch Gmbh Process for distributing the stock flowing through a paper machine head box

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3514554C3 (en) * 1984-09-19 1998-01-08 Escher Wyss Gmbh Headbox device for a paper machine and method for its operation
DE4211291C3 (en) * 1992-04-03 2001-06-07 Voith Gmbh J M Mixing device and method for mixing two liquids at a constant mixture volume flow to supply the headbox of a paper machine
DE4323263C2 (en) * 1993-07-12 2001-11-29 Voith Paper Patent Gmbh Process for the sectional influencing of the stock density and the fiber orientation in a headbox of a paper machine and headbox for carrying out the process
DE4422907C2 (en) 1994-06-30 1997-03-06 Voith Gmbh J M Sectional feed of the headbox of a paper machine
US5626722A (en) * 1995-06-01 1997-05-06 Valmet Corporation Headbox of a paper/board machine
DE19634993A1 (en) * 1996-08-30 1998-03-05 Voith Sulzer Papiermasch Gmbh Method and device for adjusting the stock density and fiber orientation profile in a headbox
US6117272A (en) * 1998-09-03 2000-09-12 Voith Sulzer Papiermaschinen Device and process for metering auxiliary materials into the flow box of a paper machine
FI113672B (en) * 1999-04-28 2004-05-31 Metso Paper Inc Method and apparatus for mixing a diluent with a stock flow in a paper machine or board machine
FI116470B (en) * 1999-10-04 2005-11-30 Metso Paper Inc Method of forming a paper web

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0635599A1 (en) * 1993-07-01 1995-01-25 Valmet Paper Machinery Inc. Method and device in the regulation of the headbox
DE19632673A1 (en) * 1996-08-14 1998-02-19 Voith Sulzer Papiermasch Gmbh Process for distributing the stock flowing through a paper machine head box

Also Published As

Publication number Publication date
EP1033436B1 (en) 2006-01-11
US20030000674A1 (en) 2003-01-02
DE19908898A1 (en) 2000-09-07
US6890408B2 (en) 2005-05-10
ATE315681T1 (en) 2006-02-15
DE59913039D1 (en) 2006-04-06
EP1033436A2 (en) 2000-09-06
US6464837B1 (en) 2002-10-15

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