EP0629739B1 - Caisse de tête pour machine à papier - Google Patents

Caisse de tête pour machine à papier Download PDF

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Publication number
EP0629739B1
EP0629739B1 EP94108842A EP94108842A EP0629739B1 EP 0629739 B1 EP0629739 B1 EP 0629739B1 EP 94108842 A EP94108842 A EP 94108842A EP 94108842 A EP94108842 A EP 94108842A EP 0629739 B1 EP0629739 B1 EP 0629739B1
Authority
EP
European Patent Office
Prior art keywords
headbox
intermediate chamber
accordance
turbulence
turbulence generator
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.)
Expired - Lifetime
Application number
EP94108842A
Other languages
German (de)
English (en)
Other versions
EP0629739B2 (fr
EP0629739A1 (fr
Inventor
Alfred Dr. Bubik
Klaus Lehleiter
Hans Dr. Dahl
Peter Mirsberger
Karl-Heinz Enderle
Elmer Dr. Weisshuhn
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 Sulzer Papiermaschinen GmbH
Original Assignee
Voith Sulzer Papiertechnik 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
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Application filed by Voith Sulzer Papiertechnik Patent GmbH filed Critical Voith Sulzer Papiertechnik Patent GmbH
Publication of EP0629739A1 publication Critical patent/EP0629739A1/fr
Application granted granted Critical
Publication of EP0629739B1 publication Critical patent/EP0629739B1/fr
Publication of EP0629739B2 publication Critical patent/EP0629739B2/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • the invention relates to a headbox for a paper machine according to The preamble of claim 1 or 2.
  • a headbox of the above Type is e.g. in the unpublished German Patent application P 42 13 707 described.
  • This particular embodiment of the previously announced object allows, already by adding air or a other medium in particular water or its discharge in the area between two Turbulence producers a targeted influence on the consistency and the Flow condition in the hydraulic headbox.
  • One of the goals of this proposed measure is then, in addition to the setting of Basis weight cross-section using geometric gap changes is made to be able to change the flow state.
  • a headbox is known from German Offenlegungsschrift DE 37 41 603 A1 with a machine-wide fabric duct, a pipe distribution grid, a compensation duct, a turbulence generator and a nozzle are known, with the material channel a device for dispensing dilution liquid is connected.
  • the said Device is attached so that the place of delivery of the dilution liquid immediately in front of the turbulence generator, which is known per se Formed as a turbulence grille insert with an upstream throttle is.
  • the German utility model G 91 15 296 U discloses a headbox for one Machine for the production of fibrous webs, in particular paper webs, with a transverse distribution pipe serving to supply material suspension, which via a Pipe distribution grid is connected to a machine-wide compensation channel as well as with an adjoining machine-wide turbulence generator with an in machine-wide nozzle following the flow direction of the stock suspension, wherein in the equalization channel numerous arranged in a row, across the Supply lines for an additional liquid, which extend across the machine, and the mouths of these feed lines both at a fixed distance from nearest inlet of the turbulence generator as well as at a fixed distance are arranged from the outlet of the pipe distribution grid.
  • a headbox device shown with a tube bank consisting of a multitude of tubes, the paper stock flowing through the tubes to form a paper web.
  • the upstream end of the tube bank is a variety of feed channels connected and each feed channel is in turn connected to a source for dilution of the paper material, which allows the flowing into the tube bank Paperwork is diluted.
  • Each feed channel and the associated closure is structured and arranged so that the flow of the dilute of the paper supply water through the closure essentially perpendicular to the flow of the paper product past the end against the neighboring one Tube is out.
  • this task is characterized by the characteristics of the Claim 1 or 2 solved.
  • the invention makes use of the knowledge that one in front of the intermediate chamber lying intensive turbulence generator with high pressure loss the mixing favored and limited at the same time locally as appropriate.
  • a hydraulic turbulence generator with a higher effect comparatively smaller flow cross sections. So he offers the liquid between them leading pipes or channels enough space for the in the characterizing part of claim 1 mentioned additional measures and is also often easier to set up.
  • the comparatively small space requirement in the first turbulence generator can be used by the individual channels to make the lines appropriate and appropriate to accommodate space-saving.
  • one is considered to be the fluid mentioned in the characterizing part of claims 1 and 2 use a relatively clear dilution water or an aqueous suspension and admit. But it can also partially the fiber suspension flowing in the headbox and derived in doses. Even a limited air supply is possible, as far as it is allows the desired paper quality.
  • the solution proposed in claim 2 uses the after the intermediate chamber lying turbulence generator initially available place to accommodate the Lines, the reversal of direction giving an impulse for better mixing can deliver. Even if the pipes are intended to flow in the direction of flow turbulence generator which takes up more space behind the intermediate chamber to accommodate, can be exploited the fact that at the intermediate chamber facing side of the turbulence generator, smaller flow cross sections for the Suspension leading channels are required, which is again a cheap Installation situation for the supply and discharge lines.
  • the turbulence generator can too can be used as a rectifier with low pressure loss, so that the Reversal of direction in the feed into the intermediate chamber is a very advantageous Provides support for the relatively weak mixing effect in the rectifier.
  • turbulence generators in the form of individual turbulence-increasing pipes and to be provided with the appropriate connections for supply or discharge lines.
  • Such Measure could replace the usually quite complex cross-flow distributor make by directly connecting the pipes belonging to the turbulence generator, for example to a hydraulic vibration damping container.
  • FIG. 1 shows schematically in side view, partly in section, an embodiment of the Headbox according to the invention.
  • An intermediate chamber 4 follows, which is followed by a further turbulence generator 3.
  • the one from this second Turbulence generator 3 material suspension emerging in the operation of the headbox is in a nozzle chamber collected and fed to an outlet gap 5, from which they are in shape of a wide gap meets at least one paper machine screen.
  • Lines 6 and 6 ' are in the case shown here with those designed as step diffusers Pipelines 7 connected.
  • the intermediate chamber 4 can advantageously have a length that is 10 to 20 times as large is like a step change of a turbulence generator designed as a step diffuser to achieve an optimal mixing.
  • FIG. 2 shows a device similar to FIG. 1, with line 6 in each case is the same for all superimposed pipelines 7.
  • the headbox shown in FIG. 3 contains only the first turbulence generator 2 a pipe 7, viewed in the vertical, which is also a step diffuser. It are indicated several places where a line 6 may be present. In the In most cases, the line not shown in dashed lines, which is in the first part of the turbulence generator, the most advantageous option. Both in this Line 6 and in the feed line to the turbulence generator 2 are control valves provided that can be controlled together via a control loop. As Another possibility to the flow in the turbulence generator 2 as desired influence, the change in the angle at which the line is indicated in Fig. 3 6 opens into the turbulence generator 2. This allows very targeted impulses to better mixing can be generated.
  • the intermediate chamber 4 is intrinsically in number Flow direction and walls 11 in extending perpendicular to the sieve plane Sub-chambers divided. In special cases this can cause an undesirable Cross-mixing in the intermediate chamber 4 can be prevented.
  • the lines 6 in the first part of the gradual widening flow channels 8 open.
  • FIG. 8 the technical structure of a with stage diffuser-like flow channels 8 provided turbulence generator 2 shown.
  • One way of making the lines 6 particularly simple, that is to say with little construction effort to produce, is shown there:
  • Within the turbulence generator block Bores with such a diameter transverse to the flow channels 8 introduced that they cut the flow channels, creating a connection is established between flow channels and lines. Expediently two adjacent rows of superimposed flow channels so with the same Supply line connected.
  • This embodiment is shown in somewhat more detail in FIG. 13.
  • the lines 6 can also within the second Turbulence generator 3 and be connected to the intermediate chamber 4. To this In this way an impulse is generated against the actual flow direction, which too a mixing of the supplied water with the suspension leads (Fig. 9 and 10).
  • FIG. 11 shows a somewhat simpler embodiment, in which the turbulence generator 2 two channels lie one above the other and the line 6 only in one of them superimposed channels, in this case in the upper one.
  • Figure 12 shows the combination of supply of dilution water (arrow 12) in the Turbulence generator 2 and withdrawal of suspension (arrow 13) in the turbulence generator 3.
  • arrow 12 dilution water
  • Figure 13 withdrawal of suspension
  • Figure 12 shows the combination of supply of dilution water (arrow 12) in the Turbulence generator 2 and withdrawal of suspension (arrow 13) in the turbulence generator 3.
  • liquid is supplied and removed in a streamline the total amount of liquid in an imaginary direction of flow contiguous area set as desired, e.g. kept the same be, with an additional option being created to the fiber amount the headbox width by changing the existing in this streamline Adjust fiber density.
  • the invention can also be easily implemented in multilayer headboxes, 14 as an example.
  • the one shown schematically there Two-layer headbox has two independently loadable Liquid supply devices 1, which are two downstream Connect turbulence generators 2 and 3, with an intermediate chamber 4 in between lies and the last turbulence generator 3 in the direction of a nozzle with a Partition 14 follows, at the end of which the exit gap 5 is located.

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  • Paper (AREA)

Claims (19)

  1. Arrivée de matière pour une machine à papier comprenant au moins un dispositif d'alimentation de liquide (1) qui se poursuit en aval par au moins chaque fois deux générateurs de turbulences constitués chacun de plusieurs éléments générateurs de turbulences et, entre deux générateurs de turbulences (2, 3) successifs, il y a une chambre intermédiaire (4), le dernier générateur de turbulences, dans le sens de l'écoulement, étant suivi par une chambre de buse dont l'extrémité est constituée par une fente de sortie (5) s'étendant pratiquement sur toute la largeur de la machine à papier, et permettant la sortie d'un jet de matière en suspension lorsque l'arrivée de matière fonctionne,
    caractérisée en ce qu'
    au niveau du générateur de turbulences (2) qui se trouve en amont de la chambre intermédiaire (4) dans le sens de l'écoulement, il y a des conduites (6) conçues et branchées pour permettre l'arrivée ou la sortie de fluide.
  2. Arrivée de matière pour une machine à papier comprenant au moins un dispositif d'alimentation de liquide (1) qui se poursuit en aval par au moins chaque fois deux générateurs de turbulences constitués chacun de plusieurs éléments générateurs de turbulences et, entre deux générateurs de turbulences (2, 3) successifs, il y a une chambre intermédiaire (4), le dernier générateur de turbulences, dans le sens de l'écoulement, étant suivi par une chambre de buse dont l'extrémité est constituée par une fente de sortie (5) s'étendant pratiquement sur toute la largeur de la machine à papier, et permettant la sortie d'un jet de matière en suspension lorsque l'arrivée de matière fonctionne,
    caractérisée en ce que
    dans la zone du générateur de turbulences (3), qui se trouve derrière la chambre intermédiaire (4), dans le sens de l'écoulement, il y a des conduites (6) conçues et branchées pour permettre l'arrivée ou la sortie de fluide dans la chambre intermédiaire, la direction d'arrivée du fluide étant opposée à la direction d'écoulement du jet de matière en suspension.
  3. Arrivée de matière selon la revendication 1 ou 2,
    caractérisée en ce que
    le générateur de turbulences (2), qui se trouve en amont de la chambre intermédiaire (4), est formé de plusieurs conduites (7) dont la section d'écoulement est conçue pour générer les turbulences.
  4. Arrivée de matière selon la revendication 3,
    caractérisée en ce que
    l'angle, entre la conduite (6) et la conduite (7), est réglable en cours de fonctionnement.
  5. Arrivée de matière selon la revendication 1 ou 2,
    caractérisée en ce que
    le générateur de turbulences (2), situé en amont de la chambre intermédiaire (4), est réalisé comme un ensemble de construction ayant plusieurs canaux d'écoulement (8) s'élargissant par gradins, appelés diffuseurs étagés.
  6. Arrivée de matière selon les revendications 3, 4 ou 5,
    caractérisée en ce que
    les conduites (6, 6') débouchent dans les canaux d'écoulement ou les conduites.
  7. Arrivée de matière selon les revendications 1, 3 ou 5,
    caractérisée en ce que
    les conduites (6, 6') débouchent dans la chambre intermédiaire (4), du côté opposé au générateur de turbulences (2) situé devant.
  8. Arrivée de matière selon la revendication 5,
    caractérisée en ce qu'
    en plus des diffuseurs étagés, l'ensemble de construction comporte d'autres canaux pour le liquide fourni ou évacué par les conduites (6, 6'), ces canaux débouchant dans la chambre intermédiaire (4) du côté non tourné vers le générateur de turbulences (2) qui se trouve devant.
  9. Arrivée de matière selon la revendication 1 ou 2,
    caractérisée en ce qu'
    à l'entrée du générateur de turbulences (2), qui se trouve devant la chambre intermédiaire (4), on choisit les sections d'écoulement pour qu'à cet endroit, lorsque l'arrivée de matière fonctionne, on accélère au moins au triple de la vitesse d'écoulement antérieure.
  10. Arrivée de matière selon la revendication 1, 2 ou 9,
    caractérisée en ce que
    sur le générateur de turbulences (2), situé devant la chambre intermédiaire (4), la perte de charge est égale à au moins 1,5 fois celle du générateur de turbulences (3) situé derrière la chambre intermédiaire (4).
  11. Arrivée de matière selon les revendications 1 et 2,
    caractérisée en ce que
    les conduites (6) sont reliées à une alimentation en liquide et les conduites (6') à une évacuation de liquide.
  12. Arrivée de matière selon la revendication 1,
    caractérisée en ce que
    la section d'écoulement, à l'entrée du générateur de turbulences (2), monté en amont de la chambre intermédiaire (4), est réglable.
  13. Arrivée de matière selon la revendication 1,
    caractérisée par
    une vanne de réglage (9) ou un moyen analogue pour régler le débit à travers les conduites (6).
  14. Arrivée de matière selon les revendications 12 et 13,
    caractérisée en ce que
    le réglage de la vanne (9) sur la conduite est accordé sur le réglage d'une vanne (10), à l'entrée du générateur de turbulences, en amont de la chambre intermédiaire (4).
  15. Arrivée de matière selon la revendication 1,
    caractérisée en ce que
    les conduites (6) débouchent dans un premier segment du générateur de turbulences (2) qui se trouve en amont de la chambre intermédiaire (4).
  16. Arrivée de matière selon la revendication 1,
    caractérisée en ce que
    la longueur de la chambre intermédiaire (4), dans la direction de l'écoulement, est de 10 à 20 fois la mesure du gradin entre l'avant-dernier élément du générateur de turbulences (2) en amont de la chambre intermédiaire (4), et le dernier élément.
  17. Arrivée de matière selon la revendication 1,
    caractérisée en ce que
    la chambre intermédiaire (4) est subdivisée en chambres partielles par des cloisons (11) qui s'étendent essentiellement perpendiculairement au plan du tamis et dans la direction de l'écoulement.
  18. Arrivée de matière selon la revendication 17,
    caractérisée en ce que
    les cloisons (11) ont des parties de surfaces ouvertes pour autoriser un écoulement transversal limité dans la chambre intermédiaire (4).
  19. Arrivée de matière selon l'une quelconque des revendications précédentes,
    caractérisée en ce qu'
    elle est constituée par une arrivée de matière à plusieurs couches avec deux ou plusieurs dispositifs d'alimentation de liquide (1) qui se raccordent en amont à au moins deux générateurs de turbulences par dispositif d'alimentation de liquide,
    et entre deux générateurs de turbulences (2, 3) successifs, il y a une chambre intermédiaire (4), tandis que dans le dernier générateur de turbulences, dans la direction de l'écoulement, il y a une chambre à buse avec au moins une cloison (14) avec, à l'extrémité, une fente de sortie (5).
EP94108842A 1993-06-18 1994-06-09 Caisse de tête pour machine à papier Expired - Lifetime EP0629739B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4320243A DE4320243C2 (de) 1993-06-18 1993-06-18 Stoffauflauf für eine Papiermaschine
DE4320243 1993-06-18

Publications (3)

Publication Number Publication Date
EP0629739A1 EP0629739A1 (fr) 1994-12-21
EP0629739B1 true EP0629739B1 (fr) 1999-09-08
EP0629739B2 EP0629739B2 (fr) 2006-04-19

Family

ID=6490642

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94108842A Expired - Lifetime EP0629739B2 (fr) 1993-06-18 1994-06-09 Caisse de tête pour machine à papier

Country Status (3)

Country Link
EP (1) EP0629739B2 (fr)
AT (1) ATE184336T1 (fr)
DE (2) DE4320243C2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8221590B2 (en) 2008-12-18 2012-07-17 Voith Patent Gmbh Headbox for a machine for producing a fibrous web
US8236138B2 (en) 2008-12-18 2012-08-07 Voith Patent Gmbh Headbox for a machine for producing a fibrous web
US8236137B2 (en) 2008-12-18 2012-08-07 Voith Patent Gmbh Headbox for a machine for producing a fibrous web

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5560807A (en) * 1995-03-29 1996-10-01 Beloit Technologies, Inc. Headbox additive injection system
US5626722A (en) * 1995-06-01 1997-05-06 Valmet Corporation Headbox of a paper/board machine
US6210535B1 (en) * 1995-06-01 2001-04-03 Valmet Corporation Stock feed system for a multi-layer headbox and method in the operation of a multi-layer headbox
FI115646B (fi) 1996-11-26 2005-06-15 Metso Paper Inc Paperikoneen/kartonkikoneen monikerrosperälaatikko
DE19652442A1 (de) * 1996-12-17 1998-06-18 Voith Sulzer Papiermasch Gmbh Verfahren und Vorrichtung zur Verteilung einer Faserstoffsuspension
DE19705591A1 (de) * 1997-02-14 1998-08-20 Voith Sulzer Papiermasch Gmbh Vorrichtung und Verfahren zur Reinhaltung von Stauflächen
DE19705590A1 (de) * 1997-02-14 1998-08-20 Voith Sulzer Papiermasch Gmbh Stoffauflauf einer Papiermaschine
AU6695798A (en) * 1997-04-29 1998-11-24 Beloit Technologies, Inc. High consistency stock profiling
DE19718034A1 (de) * 1997-04-29 1998-11-05 Voith Sulzer Papiermasch Gmbh Stoffauflauf mit Dämpfungsverteiler
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
DE19926805A1 (de) * 1999-06-12 2000-12-14 Voith Sulzer Papiertech Patent Stoffauflauf mit Fluidzudosierung
DE10208610B4 (de) * 2002-02-27 2014-03-06 Voith Patent Gmbh Verfahren zum Verteilen einer Faserstoffsuspension im Stoffauflauf einer Papier- oder Kartonmaschine und Stoffauflauf
DE10233007B3 (de) * 2002-07-20 2004-04-01 Sächsisches Textilforschungsinstitut e.V. Fahrzeugsitz, vorzugsweise Autokindersitz, mit wechselbarer Auflage
EP1496150A1 (fr) * 2003-07-09 2005-01-12 Voith Paper Patent GmbH Caisse de tête
DE10331039A1 (de) * 2003-07-09 2005-01-27 Voith Paper Patent Gmbh Stoffauflauf
DE102004055919A1 (de) * 2004-11-19 2006-05-24 Voith Paper Patent Gmbh Stoffauflauf
DE102009014268B3 (de) * 2009-03-20 2010-04-08 Andritz Küsters Gmbh Anordnung an Papiermaschinen zur Einstellung eines Flächengewichts-Querprofils
CN103821023A (zh) * 2014-03-03 2014-05-28 广东石油化工学院 一种互补式布浆器
CN108166302A (zh) * 2018-01-10 2018-06-15 浙江山鹰纸业有限公司 一种用于双网纸机的流浆箱

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3573160A (en) * 1969-01-29 1971-03-30 Kasimir Lopas Tapered manifold stock distribution system for a papermaking machine with movable wall therein
CH598407A5 (fr) * 1975-09-30 1978-04-28 Escher Wyss Gmbh
FI66931C (fi) * 1983-01-04 1984-12-10 Tampella Oy Ab Haolskiva foer en inloppslaoda foer en pappersmaskin
DE3514554C3 (de) * 1984-09-19 1998-01-08 Escher Wyss Gmbh Stoffauflauf-Vorrichtung für eine Papiermaschine und Verfahren zu deren Betrieb
DE3741603A1 (de) * 1987-12-09 1989-06-22 Voith Gmbh J M Stoffauflauf fuer eine papiermaschine od.dgl.
FR2631353A1 (fr) † 1988-05-13 1989-11-17 Semti Dispositif d'alimentation en melange pateux
FI84920C (fi) * 1988-05-27 1992-02-10 Valmet Ahlstroem Inc Hydraulisk inloppslaoda i pappers- eller kartongmaskin.
DE4005281C2 (de) * 1990-02-20 1995-04-06 Schultz Hans Joachim Dr Ing Stoffauflauf mit Regelung des Flächengewicht-Querprofiles über die Verdünnung der Fasersuspension
FI901593A (fi) † 1990-03-30 1991-10-01 Tampella Oy Ab Foerfarande vid en pappers- eller kartongmaskin foer reglering av ur inloppslaodan loepande massa samt inloppslaoda foer en papperseller kartongmaskin.
DE4019593C2 (de) † 1990-06-20 1994-01-20 Voith Gmbh J M Stoffauflauf für Papiermaschinen
US5196091A (en) * 1991-10-29 1993-03-23 Beloit Technologies, Inc. Headbox apparatus with stock dilution conduits for basis weight control
DE9115296U1 (fr) * 1991-12-10 1992-03-19 J.M. Voith Gmbh, 7920 Heidenheim, De
DE4234940C2 (de) * 1992-10-16 1994-04-07 Voith Gmbh J M Stoffauflauf mit Flächengewichts-Querprofilregelung durch lokale Konzentrationsänderung
DE4239845C2 (de) * 1992-11-05 1998-12-03 Voith Gmbh J M Verfahren zur Messung der Auswirkung von Verstellungen am Stoffauflauf und zur Korrektur des Flächengewichts- und Faserorientierungs-Querprofils

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8221590B2 (en) 2008-12-18 2012-07-17 Voith Patent Gmbh Headbox for a machine for producing a fibrous web
US8236138B2 (en) 2008-12-18 2012-08-07 Voith Patent Gmbh Headbox for a machine for producing a fibrous web
US8236137B2 (en) 2008-12-18 2012-08-07 Voith Patent Gmbh Headbox for a machine for producing a fibrous web

Also Published As

Publication number Publication date
DE4320243C2 (de) 1996-02-22
DE59408713D1 (de) 1999-10-14
EP0629739B2 (fr) 2006-04-19
ATE184336T1 (de) 1999-09-15
EP0629739A1 (fr) 1994-12-21
DE4320243A1 (de) 1994-12-22

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