EP0955407B1 - Method of and device for application - Google Patents

Method of and device for application Download PDF

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Publication number
EP0955407B1
EP0955407B1 EP99101846A EP99101846A EP0955407B1 EP 0955407 B1 EP0955407 B1 EP 0955407B1 EP 99101846 A EP99101846 A EP 99101846A EP 99101846 A EP99101846 A EP 99101846A EP 0955407 B1 EP0955407 B1 EP 0955407B1
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EP
European Patent Office
Prior art keywords
twin
wires
wire zone
application
wire
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
EP99101846A
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German (de)
French (fr)
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EP0955407A1 (en
Inventor
Dieter Egelhof
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Voith Patent GmbH
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Voith Paper Patent GmbH
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Publication of EP0955407A1 publication Critical patent/EP0955407A1/en
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F9/00—Complete machines for making continuous webs of paper
    • D21F9/003—Complete machines for making continuous webs of paper of the twin-wire type
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/52—Addition to the formed paper by contacting paper with a device carrying the material

Definitions

  • the invention relates to a method and a Device for applying a liquid or pasty Medium on a running web of paper or paper Carton according to the preamble of the first Process claim, or the first Device claim.
  • the invention is based on the German patent specification DE 194 23 48 as the closest prior art.
  • a headbox Fiber suspension deposited on a fourdrinier sieve.
  • After a Initial drainage is on the so far not by one Sieve covered side of the nonwoven fabric, a second sieve hung up.
  • On the non-fleece Side of this second sieve are more Drainage elements arranged.
  • Opposite are on the Bottom of the first screen order equipment (Applicators) assigned to the screen surface.
  • This Order facilities bring an order medium (Additive) - through the lower sieve - into the Fibrous web into it.
  • the drainage elements (Suction devices) of the second sieve support this Penetration of the application medium into the fibrous web.
  • the Twin-wire sections are essentially on one They only have drainage elements on the outside other sieve outside only order facilities arranged. The order is only on one side of the Fibrous web.
  • a disadvantage of this prior art is that the generated papers, due to the relatively coarse Sieve structure as a result of the application of the Application medium also have large screen brands that means they point surveys and on the web Depressions that reduce the quality of the paper.
  • the object of the invention is characterized by the features of first procedural claim, or the first Device claim solved.
  • a strainer that can be used for both drainage and Support the fibrous web when applying the application medium serves, with regard to its mechanical properties only be optimally designed for one of the two tasks. If the sieve is optimally designed for dewatering, so it has a relatively large mesh size, so one effective and quick drainage in the initial area of the Sieve section is created.
  • the second sieve through which the application medium is placed on the Material web is applied finely structured be designed, or a porous band than the two first screens used for the drainage of the screen be used.
  • the design of the order facility can have all known embodiments.
  • a exemplary embodiment is the use of a Coating unit in the form of a slot nozzle or Doctor device.
  • the application device be a spray application system.
  • Twin-wire zone is the arrangement of others Dewatering elements. Due to the fine mesh of the Sieves lead the drainage elements to an increase the dry content of the fibrous web, without noteworthy To leave sieve marks. An alternating one Arrangement of the drainage elements in the second Twin-wire zone also favors the symmetrical one Sheet structure of the fibrous web.
  • FIG. 1 a stock suspension is shown by means of a Headbox nozzle 1 into a gap between the screens 2, 6 injected.
  • the distance between the wire guide rolls 3, 5 determines the opening width of the gap.
  • a subsequent twin-wire sheet formation zone 4 of the first Double sieve zone 19 the suspension is dewatered to the extent that a nonwoven P is formed.
  • the sieve separation takes place in the wrapping area of the screen 6 on the Screen guide roller 8.
  • the fibrous web P follows Course of the sieve 6.
  • the fibrous web P By means of the take-off suction roll 11 and its suction zone 9, the fibrous web P on the Screen 10 deflected.
  • a second, fine-mesh sieve 13 is - coming from below - from the wire guide roller 14 deflected and from below onto the fibrous web P hung up. This creates a second twin-wire zone 20, the opposite of the first, which forms the nonwoven Double sieve zone 19, fine-mesh sieves 9, 10 has.
  • a first application device 12 carries from above through the screen 10 through an application medium on the Pulp web P on.
  • a subsequent one Drainage element 15 causes drainage after below and removes the fibrous web P further White water and / or water of the application medium.
  • a Application device 16 carries to the other side of the Fibrous web P also has an application medium.
  • the Subsequent drainage element 17 arranged at the top causes an upward drainage. This mutual arrangement of the drainage elements 15, 17 prevents one-sidedness of the fibrous web surfaces in front.

Abstract

The product band enters a further overlapping, double-sieve band (10, 13) region (20), where coating medium is applied through the sieves. An Independent claim is included for the corresponding papermaking machine. Preferably one sieve has a finer structure differing from that of earlier sieves (2, 6). Coating takes place on one or both sides. Following coating, suction is applied by nozzles or rollers, on the opposite side. Further material is applied and similarly extracted.

Description

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum Auftragen eines flüssigen oder pastösen Mediums auf eine laufende Materialbahn aus Papier oder Karton gemäß dem Oberbegriff des ersten Verfahrensanspruches, beziehungsweise des ersten Vorrichtungsanspruches.The invention relates to a method and a Device for applying a liquid or pasty Medium on a running web of paper or paper Carton according to the preamble of the first Process claim, or the first Device claim.

Die Erfindung geht von der deutschen Patentschrift DE 194 23 48 als nächstliegenden Stand der Technik aus. Dort wird mittels eines Stoffauflaufes eine Fasersuspension auf einem Langsieb abgelegt. Auf der der Fasersuspension abgewandten Seite des Siebes (Unterseite des Siebes) befinden sich erste Entwässerungselemente. Hier bildet sich ein Faservlies. Nach einer Anfangsentwässerung wird, auf der bisher nicht von einem Sieb bedeckten Seite des Faservlieses, ein zweites Sieb aufgelegt. Auf der nicht das Faservlies berührenden Seite dieses zweiten Siebes sind weitere Entwässerungselemente angeordnet. Somit erfolgt in diesem Bereich eine Entwässerung des Faservlieses in die andere Richtung. Gegenüberliegend sind auf der Unterseite des ersten Siebes Auftragseinrichtungen (Applikatoren) der Sieboberfläche zugeordnet. Diese Auftragseinrichtungen bringen ein Auftragsmedium (Zusatzstoff) - durch das untere Sieb hindurch - in die Faserstoffbahn hinein. Die Entwässerungselemente (Saugeinrichtungen) des zweiten Siebes unterstützen das Eindringen des Auftragsmediums in die Faserstoffbahn. Im Doppelsiebbereich sind im wesentlichen auf der einen Siebaußenseite nur Entwässerungselemente und auf der anderen Siebaußenseite nur Auftragseinrichtungen angeordnet. Der Auftrag erfolgt nur auf einer Seite der Faserstoffbahn.The invention is based on the German patent specification DE 194 23 48 as the closest prior art. There is a headbox Fiber suspension deposited on a fourdrinier sieve. On the the Side of the sieve facing away from the fiber suspension (underside of the sieve) there are first drainage elements. A nonwoven forms here. After a Initial drainage is on the so far not by one Sieve covered side of the nonwoven fabric, a second sieve hung up. On the non-fleece Side of this second sieve are more Drainage elements arranged. Thus in this area a drainage of the nonwoven into the other direction. Opposite are on the Bottom of the first screen order equipment (Applicators) assigned to the screen surface. This Order facilities bring an order medium (Additive) - through the lower sieve - into the Fibrous web into it. The drainage elements (Suction devices) of the second sieve support this Penetration of the application medium into the fibrous web. in the Twin-wire sections are essentially on one They only have drainage elements on the outside other sieve outside only order facilities arranged. The order is only on one side of the Fibrous web.

Nachteilig bei diesem Stand der Technik ist es, daß die erzeugten Papiere, aufgrund der relativ groben Siebstruktur als Folge der Auftragung des Auftragsmediums auch große Siebmarken aufweisen, das heißt sie weisen auf der Bahn Erhebungen und Vertiefungen auf, die die Qualität des Papieres mindern.A disadvantage of this prior art is that the generated papers, due to the relatively coarse Sieve structure as a result of the application of the Application medium also have large screen brands that means they point surveys and on the web Depressions that reduce the quality of the paper.

Es ist deshalb Aufgabe der Erfindung ein weiteres Verfahren und eine weitere Vorrichtung zu finden, die eine verbesserte Oberflächengüte ergibt.It is therefore another object of the invention Finding method and another device that results in an improved surface quality.

Die Aufgabe der Erfindung wird durch die Merkmale des ersten Verfahrensanspruches, beziehungsweise des ersten Vorrichtungsanspruches gelöst.The object of the invention is characterized by the features of first procedural claim, or the first Device claim solved.

Der Erfinder hat folgendes erkannt:The inventor recognized the following:

Ein Sieb, das sowohl zur Entwässerung, als auch zum Stützen der Faserbahn beim Auftragen des Auftragsmediums dient, kann bezüglich seiner mechanischen Eigenschaften nur für eine der beiden Aufgaben optimal ausgelegt sein. Ist das Sieb für die Entwässerung optimal ausgelegt, so hat es eine relativ große Maschenweite, damit eine wirksame und schnelle Entwässerung im Anfangsbereich der Siebpartie entsteht.A strainer that can be used for both drainage and Support the fibrous web when applying the application medium serves, with regard to its mechanical properties only be optimally designed for one of the two tasks. If the sieve is optimally designed for dewatering, so it has a relatively large mesh size, so one effective and quick drainage in the initial area of the Sieve section is created.

Weiterhin hat der Erfinder erkannt, daß Siebmarken zum einen entstehen, weil die Fäden des Siebes einen Teil der Faserstoffbahn abdecken und deshalb an diesen Stellen nicht ausreichend das Auftragsmedium zwischen Faserstoffbahn und Fäden gelangt. Zum anderen kommt es beim Auftragen des Auftragsmediums im Bereich einer Masche zu einer Anhäufung des Auftragsmediums. Beim Ablösen des Siebes von der mit Auftragsmedium benetzten Faserstoffbahnoberfläche entstehen dann im Bereich der Siebmaschen kleine, störende Erhebungen. Je größer die Siebmaschen sind, desto größer fallen auch die Erhebungen in ihren Abmessungen aus. Diese Erhebungen führen zu Problemen bei der Weiterbehandlung der Faserstoffbahn. Im übrigen kann es auch vorteilhaft sein, wenn die Siebbahn, die der Auftragsvorrichtung gegenüberliegt, mechanisch für eine optimal stützende Wirkung ausgelegt wird, so daß sich eine möglichst gleichmäßige Auftragung über die gesamte Siebbreite ergibt.Furthermore, the inventor recognized that screen marks for one arise because the threads of the sieve are part cover the fibrous web and therefore on this Do not sufficiently place the order medium between Fiber web and threads arrives. On the other hand, it happens when applying the application medium in the area of a Mesh to an accumulation of the application medium. At the Detach the screen from the one wetted with the application medium Fiber web surface then arise in the area of Sieve meshes small, disturbing elevations. The bigger the Sieve meshes are the bigger they fall Surveys in their dimensions. These surveys lead to problems in the further processing of the Fibrous web. Otherwise, it can also be advantageous be when the wire is that of the applicator opposite, mechanically for optimally supportive Effect is designed so that there is a possible even application across the entire screen width results.

Aufgrund der vorausgegangenen Überlegungen, kam der Erfinder zu der beschriebenen Lösung. Demgemäß wird vorgeschlagen, das Auftragsverfahren so zu gestalten, daß das erste Faservlies in einem ersten Doppelsieb entsteht, das optimal für die Entwässerung ausgelegt ist. Danach wird die Faserstoffbahn auf ein zweites Doppelsieb übergeben, welches bezüglich seiner mechanischen Eigenschaften optimal für die Aufbringung des Auftragsmediums im Siebbereich ausgelegt ist.Due to the previous considerations, the Inventor to the solution described. Accordingly proposed to design the order process so that the first nonwoven fabric in a first twin wire arises, which is optimally designed for drainage is. Then the fibrous web is placed on a second Pass double sieve, which regarding its mechanical properties optimal for application of the application medium is designed in the screen area.

Gemäß einer Weiterbildung des Erfindungsgedanken kann das zweite Sieb, durch das das Auftragsmedium auf die Materialbahn aufgetragen wird, feinstrukturierter gestaltet sein, oder ein poröses Band, als die beiden ersten Siebe, die für die Entwässerung der Siebbahn genutzt werden. According to a development of the inventive concept the second sieve through which the application medium is placed on the Material web is applied, finely structured be designed, or a porous band than the two first screens used for the drainage of the screen be used.

In der zweiten Doppelsiebzone hat man auch die Möglichkeit die Faserstoffbahn von zwei Seiten her mit einem Auftragsmedium zu versehen. Dieses hat den weiteren Vorteil, daß das jeweils gegenüberliegende Sieb die Auftragseinrichtung stützt. Es besteht aber auch die Möglichkeit, das Auftragsmedium nur von einer Seite her aufzutragen. In diesem Fall muß nur das auf dieser Seite sich befindende Sieb feinstrukturierter sein.In the second twin-wire zone you also have that Possibility of using the fibrous web from two sides to provide an order medium. This has that further advantage that the opposite sieve supports the order facility. But there is also Possibility of the order medium only from one side apply. In this case, only that on this page existing sieve can be more finely structured.

Die konstruktive Ausgestaltung der Auftragseinrichtung kann alle bekannten Ausführungsformen haben. Eine beispielshafte Ausgestaltung ist die Verwendung eines Streichaggregates in der Form einer Schlitzdüsen- oder Rakeleinrichtung. Ferner kann die Auftragseinrichtung ein Sprühauftragssystem sein.The design of the order facility can have all known embodiments. A exemplary embodiment is the use of a Coating unit in the form of a slot nozzle or Doctor device. Furthermore, the application device be a spray application system.

Eine weitere Ausgestaltung der erfindungsgemäßen zweiten Doppelsiebzone ist die Anordnung von weiteren Entwässerungselementen. Aufgrund der Feinmaschigkeit der Siebe führen die Entwässerungselemente zu einer Erhöhung des Trockengehalts der Faserstoffbahn, ohne nennenswerte Siebmarkierungen zu hinterlassen. Eine alternierende Anordnung der Entwässerungselemente in der zweiten Doppelsiebzone begünstigt auch den symmetrischen Blattaufbau der Faserstoffbahn.Another embodiment of the second invention Twin-wire zone is the arrangement of others Dewatering elements. Due to the fine mesh of the Sieves lead the drainage elements to an increase the dry content of the fibrous web, without noteworthy To leave sieve marks. An alternating one Arrangement of the drainage elements in the second Twin-wire zone also favors the symmetrical one Sheet structure of the fibrous web.

Ein direktes einander gegenüber Anordnen von Entwässerungselement und Auftragseinrichtung in der zweiten Doppelsiebzone, bewirkt eine präzisere Führung der Siebe und verbessert somit den Auftrags- und Entwässerungsprozeß.Placing one directly opposite each other Drainage element and application device in the second twin-wire zone, results in a more precise guidance the sieves and thus improves the order and Dewatering process.

Weitere Ausgestaltungen der Erfindungen sind in den Unteransprüchen zum ersten Verfahrensanspruch, beziehungsweise zum ersten Vorrichtungsanspruch und in der nachfolgenden Figurenbeschreibung dargestellt.Further refinements of the inventions are in the Subclaims to the first procedural claim, or the first device claim and in shown in the following description of the figures.

Es versteht sich, daß die vorstehend genannten und nachstehend noch zu erläuternden Merkmale der Erfindung nicht nur in der jeweils angegebenen Kombination, sondern auch in anderen Kombinationen oder in Alleinstellung verwendbar sind, ohne den Rahmen der Erfindung zu verlassen.It is understood that the above and Features of the invention to be explained below not only in the specified combination, but also in other combinations or in USP can be used without the scope of Leaving invention.

Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung eines bevorzugten Ausführungsbeispiels unter Bezugnahme auf die Zeichnung.

Fig. 1
Siebpartie einer erfindungsgemäßen Papieroder Kartonmaschine.
Further features and advantages of the invention result from the following description of a preferred exemplary embodiment with reference to the drawing.
Fig. 1
Screen section of a paper or board machine according to the invention.

In der Figur 1 wird eine Stoffsuspension mittels einer Stoffauflaufdüse 1 in einen Spalt zwischen die Siebe 2, 6 hineingespritzt. Der Abstand der Siebleitwalzen 3, 5 bedingt die Offnungsweite des Spaltes. In einer nachfolgenden Doppelsieb-Blattbildungszone 4 der ersten Doppelsiebzone 19 wird die Suspension soweit entwässert, daß sich ein Faservlies P bildet. Die Siebtrennung erfolgt im Umschlingungsbereich des Siebes 6 auf der Siebleitwalze 8. Durch eine in der Siebleitwalze 8 vorhandenen Saugzone 7 folgt die Faserstoffbahn P dem Verlauf des Siebes 6. Im Bereich zwischen den Siebleitwalzen 8, 18 berührt das feinmaschigere Sieb 10 die Faserstoffbahn P. Mittels der Abnahmesaugwalze 11 und ihrer Saugzone 9 wird die Faserstoffbahn P auf das Sieb 10 umgelenkt. Ein zweites, feinmaschiges Sieb 13 wird - von unten kommend - von der Siebleitwalze 14 umgelenkt und von unten her auf die Faserstoffbahn P aufgelegt. Somit entsteht eine zweite Doppelsiebzone 20, die gegenüber der ersten, das Faservlies bildenden Doppelsiebzone 19, feinmaschigere Siebe 9, 10 aufweist. Eine erste Auftragseinrichtung 12 trägt von oben her durch das Sieb 10 hindurch ein Auftragsmedium auf die Faserstoffbahn P auf. Ein nachfolgendes Entwässerungselement 15 bewirkt eine Entwässerung nach unten und entzieht der Faserstoffbahn P weiteres Siebwasser und/oder Wasser des Auftragsmediums. Eine Auftragseinrichtung 16 trägt auf die andere Seite der Faserstoffbahn P ebenfalls ein Auftragsmedium auf. Das oben angeordnete, nachfolgende Entwässerungselement 17 bewirkt eine Entwässerung nach oben. Diese wechselseitige Anordnung der Entwässerungselemente 15, 17 beugt einer Einseitigkeit der Faserstoffbahn-Oberflächen vor.In FIG. 1, a stock suspension is shown by means of a Headbox nozzle 1 into a gap between the screens 2, 6 injected. The distance between the wire guide rolls 3, 5 determines the opening width of the gap. In a subsequent twin-wire sheet formation zone 4 of the first Double sieve zone 19, the suspension is dewatered to the extent that a nonwoven P is formed. The sieve separation takes place in the wrapping area of the screen 6 on the Screen guide roller 8. By a in the screen guide roller 8 Existing suction zone 7, the fibrous web P follows Course of the sieve 6. In the area between the Screen guide rollers 8, 18 touch the finer mesh screen 10 the fibrous web P. By means of the take-off suction roll 11 and its suction zone 9, the fibrous web P on the Screen 10 deflected. A second, fine-mesh sieve 13 is - coming from below - from the wire guide roller 14 deflected and from below onto the fibrous web P hung up. This creates a second twin-wire zone 20, the opposite of the first, which forms the nonwoven Double sieve zone 19, fine-mesh sieves 9, 10 has. A first application device 12 carries from above through the screen 10 through an application medium on the Pulp web P on. A subsequent one Drainage element 15 causes drainage after below and removes the fibrous web P further White water and / or water of the application medium. A Application device 16 carries to the other side of the Fibrous web P also has an application medium. The Subsequent drainage element 17 arranged at the top causes an upward drainage. This mutual arrangement of the drainage elements 15, 17 prevents one-sidedness of the fibrous web surfaces in front.

Insbesondere kann auch bereits in der ersten Doppelsiebzone ein Vorimprägnieren der Bahn und die feinere Auftragung in der zweiten Doppelsiebzone mit den Mitteln 12, 15, 16, 17 - wie beschrieben -, erfolgen.In particular, even in the first Twin wire zone pre-impregnating the web and the finer application in the second twin wire zone with the Means 12, 15, 16, 17 - as described - take place.

Mit dem oben beschriebenen erfindungsgemäßen Verfahren und der erfindungsgemäßen Vorrichtung ist es nun möglich, das Aufbringen von Auftragsmedium in der Naßpartie der Papiermaschine optimal durchzuführen, da jetzt die Auftragung mit Hilfe von besonders geeigneten Siebe erfolgt, während die initiale Entwässerung des Faservlieses weiterhin ohne jegliche Einschränkung betrieben werden kann. Dies führt im Endergebnis zu einer wesentlichen Reduzierung von Siebmarkenbildung und einer gleichmäßigen Oberfläche der entstehenden Papierbahn. With the inventive method described above and the device according to the invention is now possible to apply the application medium in the To perform the wet end of the paper machine optimally, because now apply with the help of particularly suitable ones Sieving takes place during the initial drainage of the Nonwoven continues to be without any restrictions can be operated. This leads to the bottom line a substantial reduction of sieve mark formation and a uniform surface of the emerging Paper web.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Stoffauflaufheadbox
22
Siebscree
33
Siebleitwalzewire guide roll
44
DoppelsiebblattbildungszoneDoppelsiebblattbildungszone
55
Siebleitwalzewire guide roll
66
Siebscree
77
Saugzonesuction zone
88th
SiebsaugwalzeSuction roll
99
Saugzonesuction zone
1010
feinmaschiges Siebfine mesh sieve
1111
SiebsaugwalzeSuction roll
1212
Auftragseinrichtungapplicator
1313
feinmaschiges Siebfine mesh sieve
1414
Siebleitwalzewire guide roll
1515
Entwässerungselementdewatering element
1616
Auftragseinrichtungapplicator
1717
Entwässerungselementdewatering element
1818
Saugzonesuction zone
1919
erste Doppelsiebzonefirst twin-wire zone
2020
zweite Doppelsiebzonesecond twin-wire zone

Claims (14)

  1. Method of applying a liquid or pasty application medium to a moving material web (P) of paper or board, the material web (P) being formed in a wire section in a first twin-wire zone (19) between two wires (2, 6) running in the manner of a sandwich, or possibly between a wire and a forming roll surface, characterized in that the material web (P) is transferred to a further twin-wire zone (20) having two further wires (10, 13) running in a manner of a sandwich, and the application medium is applied to the material web (P) through at least one of the two wires (10; 13).
  2. Method according to Claim 1, characterized in that at least one of the two wires (10, 13) has another, finer structure than the first wires (2, 6).
  3. Method according to one of Claims 1 - 2, characterized in that the application medium is applied only to one side of the material web (P).
  4. Method according to one of Claims 1 - 3, characterized in that the application medium is applied to both sides of the material web (P).
  5. Method according to one of Claims 1 - 4, characterized in that, following the application of the application medium, extraction is carried out with suction means or suction rolls on the opposite side of the material web.
  6. Method according to Claim 5, characterized in that following the extraction, on the same side of the material web, a further application of application medium is carried out with subsequent extraction on the opposite side.
  7. Papermaking machine having an apparatus for applying a liquid or pasty application medium to a moving material web (P) of paper or board, having a wire section which has a first twin-wire zone (19) with wires (2, 3) running in a manner of a sandwich, characterized in that a second twin-wire zone (20) is provided, following the first twin-wire zone (19), and has at least one application device (12, 16) on at least one side of the web.
  8. Papermaking machine having an apparatus according to Claim 7, characterized in that at least one of the wires (10, 13) of the second twin-wire zone (20) has another, finer structure than the wires (2, 6) of the first twin-wire zone (19).
  9. Papermaking machine having an apparatus according to one of Claims 7 - 8, characterized in that the two wires (10, 13) of the second twin-wire zone have the same structure.
  10. Papermaking machine having an apparatus according to one of Claims 7 - 9, characterized in that at least one dewatering device (15, 17) is arranged in the second twin-wire zone (20).
  11. Papermaking machine having an apparatus according to one of Claims 7 - 10, characterized in that at least one dewatering device (15, 17) and at least one application device (12, 16) are arranged alternately in the second twin-wire zone (20).
  12. Papermaking machine having an apparatus according to one of Claims 7 to 11, characterized in that at least one dewatering device (15, 17) and at least one application device (12, 16) are arranged opposite each other in the second twin-wire zone (20).
  13. Papermaking machine having an apparatus according to one of Claims 7 - 12, characterized in that, instead of the wires of conventional design used in the second twin-wire zone, porous structured belts are used.
  14. Papermaking machine having an apparatus according to one of Claims 7 - 13, characterized in that the application devices (12, 16) and the dewatering elements (15, 17) are additionally arranged in the first twin-wire zone.
EP99101846A 1998-05-08 1999-01-28 Method of and device for application Expired - Lifetime EP0955407B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19820585A DE19820585A1 (en) 1998-05-08 1998-05-08 Application method and device
DE19820585 1998-05-08

Publications (2)

Publication Number Publication Date
EP0955407A1 EP0955407A1 (en) 1999-11-10
EP0955407B1 true EP0955407B1 (en) 2003-08-20

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US (1) US6258212B1 (en)
EP (1) EP0955407B1 (en)
AT (1) ATE247749T1 (en)
CA (1) CA2271186A1 (en)
DE (2) DE19820585A1 (en)

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US3560334A (en) * 1965-09-27 1971-02-02 Mead Corp Apparatus for incorporating additive dispersions to wet webs of paper
US3577290A (en) * 1968-08-19 1971-05-04 Procter & Gamble Process of making a nonwoven fabric
DE1942348A1 (en) * 1969-08-20 1971-03-04 Voith Gmbh J M Wire section of a paper machine with an applicator
DE6932836U (en) * 1969-08-20 1971-12-30 Voith Gmbh J M SCREEN SECTION OF A PAPER MACHINE WITH AN APPLICATOR.
DE3327056A1 (en) * 1983-07-27 1985-02-14 J.M. Voith Gmbh, 7920 Heidenheim MACHINE FOR MAKING A FIBER TRAIN
GB8427704D0 (en) * 1984-11-01 1984-12-05 Wiggins Teape Group Ltd Applying liquid composition to fibrous web
FR2574829B1 (en) * 1984-12-17 1987-01-09 Du Pin Cellulose PROCESS AND DEVICE FOR REMOVING LIQUID FROM A LAYER OBTAINED IN PARTICULAR BY A PAPER PROCESS
AT391677B (en) * 1988-11-22 1990-11-12 Fehrer Textilmasch DEVICE FOR THE SENSUAL APPLICATION OF A FLEECE TAPE ON A MOVING CARRIAGE RAIL

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CA2271186A1 (en) 1999-11-08
DE59906635D1 (en) 2003-09-25
DE19820585A1 (en) 1999-11-11
US6258212B1 (en) 2001-07-10
EP0955407A1 (en) 1999-11-10
ATE247749T1 (en) 2003-09-15

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