SE8800607D0 - headbox - Google Patents

headbox

Info

Publication number
SE8800607D0
SE8800607D0 SE8800607A SE8800607A SE8800607D0 SE 8800607 D0 SE8800607 D0 SE 8800607D0 SE 8800607 A SE8800607 A SE 8800607A SE 8800607 A SE8800607 A SE 8800607A SE 8800607 D0 SE8800607 D0 SE 8800607D0
Authority
SE
Sweden
Prior art keywords
transducers
control signal
nozzle chamber
headbox
pressure
Prior art date
Application number
SE8800607A
Other languages
Swedish (sv)
Other versions
SE8800607A0 (en
Inventor
H Dahl
E Weisshuhn
Original Assignee
Escher Wyss 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
Application filed by Escher Wyss Gmbh filed Critical Escher Wyss Gmbh
Publication of SE8800607D0 publication Critical patent/SE8800607D0/en
Publication of SE8800607A0 publication Critical patent/SE8800607A0/en

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
    • D21F1/024—Details of the feed chamber
    • 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
    • D21F1/06—Regulating pulp flow

Landscapes

  • Paper (AREA)

Abstract

A headbox comprising a distribution duct 1 and nozzle chamber 7 formed between side plates 9 and slice lips 8 is provided with pressure transducers 10 or velocity transducers within or in front of the nozzle chamber to measure the rates at which a fibrous papermaking suspension flows therethrough, a control device 11 for receiving the signals from the transducers and transmitting a control signal in response to the difference therebetween and a flow regulating device 12 which is controlled by the control signal. The pressure transducers may comprise piezoelectric, membrane, pressure head or Pitot tube - type sensors. Velocity measurement may be made using lasers. A more even web of paper over the whole web width is said to result. <IMAGE>
SE8800607A 1987-02-23 1988-02-22 Headbox SE8800607A0 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH67587A CH671418A5 (en) 1987-02-23 1987-02-23

Publications (2)

Publication Number Publication Date
SE8800607D0 true SE8800607D0 (en) 1988-02-22
SE8800607A0 SE8800607A0 (en) 1988-08-24

Family

ID=4192539

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8800607A SE8800607A0 (en) 1987-02-23 1988-02-22 Headbox

Country Status (6)

Country Link
AT (1) AT391719B (en)
CH (1) CH671418A5 (en)
DE (1) DE3715329A1 (en)
FI (1) FI880290A (en)
GB (1) GB2201173B (en)
SE (1) SE8800607A0 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0391015A1 (en) * 1989-04-06 1990-10-10 Hans Albert Headbox system
DE19923149A1 (en) * 1999-05-20 2000-11-23 Voith Sulzer Papiertech Patent Fine control system for the pressures at the stock inlet of a papermaking machine
JP2003510472A (en) * 1999-09-21 2003-03-18 メトソ ペーパ インコーポレイテッド Short circulation of paper machine or its equivalent and headbox adjustment system
DE19953225A1 (en) * 1999-11-05 2001-05-23 Voith Paper Patent Gmbh Fiber orientation control in a paper/cardboard web uses pulp flow data at the stock inlet to correct the flow speed and pulp throughput in sections by a diaphragm together with throttles and fluid feed/extraction systems
WO2001049929A1 (en) * 1999-12-30 2001-07-12 Metso Paper, Inc. Method and system for controlling headbox in a paper/board machine
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
FI113197B (en) * 2002-09-20 2004-03-15 Metso Paper Inc The applicator
CN104120616B (en) * 2014-07-25 2016-05-18 陕西科技大学 The fine-tuning quadrate centrum main pipe of exempting to reflux

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3487686A (en) * 1967-11-15 1970-01-06 Beloit Corp Velocity measurement for headboxes
CH608049A5 (en) * 1976-01-23 1978-12-15 Escher Wyss Gmbh
SE428810B (en) * 1981-12-01 1983-07-25 Karlstad Mekaniska Ab CONTROL SYSTEM FOR REGULATING A MULTIPLE INPUT CHARGE FOR A PAPER MACHINE
DE3439051A1 (en) * 1984-09-19 1986-03-27 Sulzer-Escher Wyss GmbH, 7980 Ravensburg Headbox device for a papermachine
DE3514554C3 (en) * 1984-09-19 1998-01-08 Escher Wyss Gmbh Headbox device for a paper machine and method for its operation
DE3441612A1 (en) * 1984-11-14 1985-11-21 Sulzer-Escher Wyss GmbH, 7980 Ravensburg Headbox for drainage machines

Also Published As

Publication number Publication date
GB8803306D0 (en) 1988-03-09
AT391719B (en) 1990-11-26
ATA344987A (en) 1990-05-15
SE8800607A0 (en) 1988-08-24
DE3715329A1 (en) 1988-09-01
CH671418A5 (en) 1989-08-31
FI880290A0 (en) 1988-01-22
FI880290A (en) 1988-08-24
GB2201173B (en) 1991-02-13
GB2201173A (en) 1988-08-24

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