EP0590288B1 - Multi-layer pressfabric for the wetpress of a paper machine - Google Patents

Multi-layer pressfabric for the wetpress of a paper machine Download PDF

Info

Publication number
EP0590288B1
EP0590288B1 EP93113084A EP93113084A EP0590288B1 EP 0590288 B1 EP0590288 B1 EP 0590288B1 EP 93113084 A EP93113084 A EP 93113084A EP 93113084 A EP93113084 A EP 93113084A EP 0590288 B1 EP0590288 B1 EP 0590288B1
Authority
EP
European Patent Office
Prior art keywords
threads
sieve according
press
water reservoir
fabric
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
EP93113084A
Other languages
German (de)
French (fr)
Other versions
EP0590288A1 (en
Inventor
Franz-Ferdinand Dipl.-Kfm. Kufferath
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.)
KUFFERATH FRANZ FERDINAND DIPL
Original Assignee
KUFFERATH FRANZ FERDINAND DIPL
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 KUFFERATH FRANZ FERDINAND DIPL filed Critical KUFFERATH FRANZ FERDINAND DIPL
Publication of EP0590288A1 publication Critical patent/EP0590288A1/en
Application granted granted Critical
Publication of EP0590288B1 publication Critical patent/EP0590288B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • D21F1/0027—Screen-cloths
    • D21F1/0036—Multi-layer screen-cloths
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S162/00—Paper making and fiber liberation
    • Y10S162/90—Papermaking press felts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/30—Woven fabric [i.e., woven strand or strip material]
    • Y10T442/3065—Including strand which is of specific structural definition
    • Y10T442/3089—Cross-sectional configuration of strand material is specified
    • Y10T442/3114—Cross-sectional configuration of the strand material is other than circular
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/30—Woven fabric [i.e., woven strand or strip material]
    • Y10T442/3472—Woven fabric including an additional woven fabric layer
    • Y10T442/3528—Three or more fabric layers

Definitions

  • the invention relates to a multi-layer press screen for wet pressing a paper machine.
  • the invention has for its object to improve the known press screens of the type mentioned. This object is achieved by a press screen with the features of claim 1.
  • the water storage integrated into the fabric of the press screen prevents due to its capillary and / or adhesive property that the water taken up by the press belt in the nip of a wet press does not prematurely after the press screen emerges from the wet press by a so-called film splitting on a guide roller or the like or under the influence of centrifugal force is given off during a deflection, rather can be transported to a drainage station, which is formed, for example, by a pipe suction device.
  • An early release of water can lead to spraying and the formation of water mist in the wet press, which can be disruptive to the manufacturing process due to the formation of drops and the like.
  • the water reservoir is formed by additional threads running in the transverse direction of the sieve and / or in the longitudinal direction of the sieve, wherein these threads can be included in at least one of the sieve layers or can also form an additional layer, which is preferably designed such that it is highly capillary and has a high wettable surface.
  • Multifilament yarns, staple fiber yarns, micro yarns, i.e. yarns in the titer range below 1 dtex, but also monofilament profile threads with an increased surface area, are therefore particularly suitable for the water reservoir. All of these threads can be very thin because, due to the distance from the contact surface for the web to be dewatered and from the machine running side, they are protected against wear by external influences.
  • the threads of the water reservoir can be arranged in one or more weft layers and / or warp layers. Furthermore, it is not necessary to form the water reservoir exclusively from multifilament yarns, staple fiber yarns and micro yarns. Alternating monofilament and multifilament threads can also follow one another.
  • the screen fabric is designed so that its water permeability decreases according to a double funnel from the contact surface for the web to be dewatered towards the water reservoir, has its smallest value in the area of the water reservoir and increases again from here to the machine running side. This results in a particularly high drainage capacity of the screen fabric, especially since the water storage tank has a retention capacity counteracts a so-called rewetting of the web, ie a release of water to the web after leaving the press nip.
  • the top layer on the preferably monoplan-shaped upper side of which the web to be dewatered comes into contact, advantageously has at least no significant change in its hydraulic drainage resistance under the pressure load in a press which allows dimensional stability. This ensures that the lowest possible hydraulic drainage resistance is opposed to the water pressed out of the web in the press nip, which is important for absorbing the water in the press nip.
  • the top layer therefore consists of pressure-resistant, monofilament threads.
  • the monofilament longitudinal threads of the top layer can also have a rectangular, oval or dumbbell-shaped cross-section instead of a round one, whereby the specific pressure load of the monofilament threads can be changed and the effective contact surface for the web can be changed, for example enlarged.
  • At least the longitudinal threads also consist of pressure-resistant, monofilament threads, which in addition to a round one also have a rectangular, oval or can have a hand-shaped cross-section, which, like the profile threads of the top layer, can change the specific pressure load of the threads and the effective running surface of the screen fabric.
  • the water retention capacity of the underlay can be increased if necessary by weaving threads twisted from monofilaments.
  • the monofilament threads are preferably made of a plastic such as PA 6.12 or PA 6.10, which has a water absorption of less than 6%.
  • a multi-layer press screen which instead of a press felt carries a web to be dewatered when it passes through a wet press of a paper or board machine, consists of an upper fabric designated as a whole with 1, the upper side of which forms the contact surface for the web to be dewatered, one as a whole with 2 designated sub-fabric, which forms the machine running side of the press screen and an intermediate layer 10 arranged between the two.
  • the upper fabric 1 is made in the embodiment, but can also be multi-layer. In the case of a multi-layer design, the lower layer adjacent to the intermediate fabric 3 would preferably be designed so that its hydraulic drainage resistance is greater than that of the upper layer.
  • the side of the upper fabric 1 forming the contact surface for the draining web is monoplan.
  • both the weft threads 4 and the warp threads 5 are monofilament threads made of pressure-resistant plastic, whereby not only those with a circular cross-section come into question, but also those with an enlarged surface, for example monofilament threads with a rectangular, oval or dumbbell-shaped cross-section.
  • Such cross-sectional shapes reduce the specific pressure load on the threads and increase the effective size of the contact surface for the web to be dewatered.
  • the lower fabric 2 has an upper weft layer consisting of upper wefts 6 and a lower weft layer consisting of lower wefts 7.
  • Each of the sub-shots 7 is precisely aligned with one of the upper shots 6.
  • Warp threads 8 bind with the upper wefts 6 and the lower wefts 7 in such a way that the hydraulic drainage resistance of the lower layer of the lower fabric 2 is lower than that of the upper layer.
  • the inclusion of the warp threads 8 in the lower layer is therefore less than in the upper layer.
  • the binding is chosen so that it supports the achievement of a dimensional stability of the lower fabric 2 under the pressure prevailing in the nip of a wet press.
  • the dimensional stability of the lower fabric 2 which ensures that the space made available for the absorption of water is not significantly reduced in the press nip, is achieved by using monofilament threads.
  • These threads can have a rectangular, oval or dumbbell-shaped cross-section instead of the round one, which reduces the specific pressure load of the threads and increases the effective machine running surface.
  • the intermediate layer 10 is arranged, which in the exemplary embodiment consists exclusively of weft threads 11, which are arranged in a single layer.
  • the intermediate layer 10 can consist of a single or multi-layer fabric, that is to say both of weft threads and of warp threads.
  • all weft threads 11 are multifilament threads. If monofilament threads are also used, then preferably monofilament and multifilament threads follow one another alternately. Monofilament threads in the intermediate layer 10 have a positive effect on the desired incompressibility of the entire press screen.
  • the intermediate layer 10 is highly capillary and adhesive for water. It therefore forms a water reservoir at a distance from the top surface of the upper fabric 1 forming the contact surface for the web to be dewatered, which has a very small storage capacity, but only releases the water stored in it at very high forces.
  • the intermediate layer 10 therefore effectively prevents the water taken up by the press screen in the nip of a press from being released prematurely after leaving the press nip, either by centrifugal forces when deflected by a guide roller or by film splitting on a roller surface.
  • the intermediate layer 10 which has the effect of a compacted fabric layer with an extremely high wettable surface and fine capillary mesh openings, has the highest hydraulic drainage resistance. Therefore, the hydraulic drainage resistance of the contact surface for the web to be dewatered top of the upper fabric 1 to the intermediate layer 10 to where it has its greatest value, and then decreases again to the machine running side. It is therefore comparable to a double funnel.
  • the size of the openings serving for dewatering decreases according to a double funnel from the contact surface for the web to be dewatered to the intermediate layer 10 and then again to the machine running side, that is to say the underside of the lower fabric 2.

Landscapes

  • Paper (AREA)
  • Woven Fabrics (AREA)
  • Braking Arrangements (AREA)
  • Sheet Holders (AREA)
  • Inorganic Insulating Materials (AREA)

Abstract

A multi-layer press fabric for the wet press of a paper machine has a capillary and/or adhesive water store (10) which is integrated into the fabric at a distance from both the contact surface for the web to be dehydrated and from the machine running side. <IMAGE>

Description

Die Erfindung betrifft ein mehrlagiges Pressensieb für Naßpressen einer Papiermaschine.The invention relates to a multi-layer press screen for wet pressing a paper machine.

Die bekannten Pressensiebe dieser Art, z.B. gemäß der US-A-4 941 514, wurden entwickelt, um die sogenannten Pressenfilze wegen der diesen anhaftenden Mängel ersetzen zu können.The known press screens of this type, e.g. according to US-A-4 941 514, were developed in order to be able to replace the so-called press felts because of the inherent defects.

Der Erfindung liegt die Aufgabe zugrunde, die bekannten Pressensiebe der eingangs genannten Art zu verbessern. Diese Aufgabe löst ein Pressensieb mit den Merkmalen des Anspruches 1.The invention has for its object to improve the known press screens of the type mentioned. This object is achieved by a press screen with the features of claim 1.

Der in das Gewebe des Pressensiebes integrierte Wasserspeicher verhindert aufgrund seiner kapillaren und/oder adhäsiven Eigenschaft, daß das vom Pressenband im Spalt einer Naßpresse aufgenommene Wasser nicht vorzeitig nach dem Austritt des Pressensiebs aus der Naßpresse durch eine sogenannte Filmspaltung an einer Leitwalze oder dgl. oder unter dem Einfluß der Fliehkraft bei einer Umlenkung abgegeben wird, vielmehr bis zu einer Entwässerungsstation transportiert werden kann, die beispielsweise durch einen Rohrsauger gebildet ist. Eine vorzeitige Wasserabgabe kann nämlich zum Spritzen und zur Bildung von Wassernebel in der Naßpresse führen, was für den Fertigungsprozeß durch Tropfenbildung und dgl. störend sein kann.The water storage integrated into the fabric of the press screen prevents due to its capillary and / or adhesive property that the water taken up by the press belt in the nip of a wet press does not prematurely after the press screen emerges from the wet press by a so-called film splitting on a guide roller or the like or under the influence of centrifugal force is given off during a deflection, rather can be transported to a drainage station, which is formed, for example, by a pipe suction device. An early release of water can lead to spraying and the formation of water mist in the wet press, which can be disruptive to the manufacturing process due to the formation of drops and the like.

Bei einer bevorzugten Ausführungsform ist der Wasserspeicher durch zusätzliche, in Siebquerrichtung und/oder in Sieblängsrichtung verlaufende Fäden gebildet, wobei diese Fäden in wenigstens eine der Sieblagen einbezogen sein oder auch eine zusätzliche Lage bilden können, die vorzugsweise so ausgebildet ist, daß sie hochkapillar ist und eine hohe benetzbare Oberfläche hat. Für den Wasserspeicher sind deshalb insbesondere multifile Garne, Stapelfasergarne, Mikrogarne, also Garne im Titerbereich unter 1 dtex, aber auch monofile Profilfäden mit erhöhter Oberfläche, geeignet. Alle diese Fäden können sehr dünn sein, weil sie infolge des Abstandes sowohl von der Anlagefläche für die zu entwässernde Bahn als auch von der Maschinenlaufseite gegen einen Verschleiß durch äußere Einwirkungen geschützt sind. Die Fäden des Wasserspeichers können in einer oder mehrere Schußlagen und/oder Kettlagen angeordnet sein. Weiterhin ist es nicht erforderlich, den Wasserspeicher ausschließlich aus multifilen Garnen, Stapelfasergarnen und Mirkogarnen zu bilden. Es können auch alternierend monofile und multifile Fäden aufeinander folgen.In a preferred embodiment, the water reservoir is formed by additional threads running in the transverse direction of the sieve and / or in the longitudinal direction of the sieve, wherein these threads can be included in at least one of the sieve layers or can also form an additional layer, which is preferably designed such that it is highly capillary and has a high wettable surface. Multifilament yarns, staple fiber yarns, micro yarns, i.e. yarns in the titer range below 1 dtex, but also monofilament profile threads with an increased surface area, are therefore particularly suitable for the water reservoir. All of these threads can be very thin because, due to the distance from the contact surface for the web to be dewatered and from the machine running side, they are protected against wear by external influences. The threads of the water reservoir can be arranged in one or more weft layers and / or warp layers. Furthermore, it is not necessary to form the water reservoir exclusively from multifilament yarns, staple fiber yarns and micro yarns. Alternating monofilament and multifilament threads can also follow one another.

Bei einer bevorzugten Ausführungsform ist das Siebgewebe so ausgebildet, daß seine Wasserdurchlässigkeit entsprechend einem Doppeltrichter von der Anlagefläche für die zu entwässernde Bahn gegen den Wasserspeicher hin abnimmt, im Bereich des Wasserspeicher ihren kleinsten Wert hat und von hier aus zur Maschinenlaufseite hin wieder zunimmt. Hierdurch erhält man eine besonders hohe Entwässerungsleistung des Siebgewebes, zumal der Wasserspeicher wegen seines Rückhaltevermögens einer sogenannten Rückfeuchtung der Bahn, d.h. einer Wasserabgabe an die Bahn nach dem Verlassen des Pressenspaltes, ebenfalls entgegenwirkt.In a preferred embodiment, the screen fabric is designed so that its water permeability decreases according to a double funnel from the contact surface for the web to be dewatered towards the water reservoir, has its smallest value in the area of the water reservoir and increases again from here to the machine running side. This results in a particularly high drainage capacity of the screen fabric, especially since the water storage tank has a retention capacity counteracts a so-called rewetting of the web, ie a release of water to the web after leaving the press nip.

Die Oberlage, an deren vorzugsweise monoplan ausgebildeten Oberseite die zu entwässernde Bahn in Anlage kommt, hat vorteilhafterweise eine zumindest keine wesentliche Änderung ihres hydraulischen Entwässerungswiderstandes unter der Druckbelastung in einer Presse zulassende Formstabilität. Hierdurch ist gewährleistet, daß dem im Pressenspalt aus der Bahn herausgedrückten Wasser ein möglichst geringer hydraulischer Entwässerungswiderstand entgegengesetzt wird, was für eine Aufnahme des Wasser im Pressenspalt wichtig ist. Außer der Wahl einer Bindung für die Oberlage, welche die Formstabilität begünstigt, besteht deshalb die Oberlage aus druckresistenten, monofilen Fäden. Die monofilen Längsfäden der Oberlage können statt eines runden auch einen rechteckigen, ovalen oder hantelförmigen Querschnitt haben, wodurch die spezifische Druckbelastung der monofilen Fäden verändert und die effektive Anlagefläche für die Bahn verändert, beispielsweise vergrößert, werden kann.The top layer, on the preferably monoplan-shaped upper side of which the web to be dewatered comes into contact, advantageously has at least no significant change in its hydraulic drainage resistance under the pressure load in a press which allows dimensional stability. This ensures that the lowest possible hydraulic drainage resistance is opposed to the water pressed out of the web in the press nip, which is important for absorbing the water in the press nip. In addition to the choice of a binding for the top layer, which favors the dimensional stability, the top layer therefore consists of pressure-resistant, monofilament threads. The monofilament longitudinal threads of the top layer can also have a rectangular, oval or dumbbell-shaped cross-section instead of a round one, whereby the specific pressure load of the monofilament threads can be changed and the effective contact surface for the web can be changed, for example enlarged.

Da auch bei der Unterlage eine Formstabilität anzustreben ist, damit das von der Unterlage zur Verfügung gestellte Speichervolumen nicht im Pressenspalt wesentlich vermindert wird, bestehen auch bei der Unterlage zumindest die Längsfäden aus druckresistenten, monofilen Fäden, die außer einem runden auch einen rechteckigen, ovalen oder handelförmigen Querschnitt haben können, wodurch wie bei den Profilfäden der Oberlage die spezifische Druckbelastung der Fäden und die effektive Lauffläche des Siebgewebes verändert werden können.Since a dimensional stability is also to be striven for in the base so that the storage volume provided by the base is not significantly reduced in the press nip, at least the longitudinal threads also consist of pressure-resistant, monofilament threads, which in addition to a round one also have a rectangular, oval or can have a hand-shaped cross-section, which, like the profile threads of the top layer, can change the specific pressure load of the threads and the effective running surface of the screen fabric.

Werden Monofile für die Fäden des Wasserspeichers verwendet, dann ist es zweckmäßig, Profilfäden mit gegenüber runden Fäden vergrößerter Oberfläche zu versehen, beispielsweise Fäden mit einem sternförmigen oder kreuzförmigen Querschnitt.If monofilaments are used for the threads of the water reservoir, then it is expedient to provide profiled threads with a surface that is enlarged compared to round threads, for example threads with a star-shaped or cruciform cross-section.

Die Wasserrückhaltefähigkeit der Unterlage kann im Bedarfsfalle dadurch erhöht werden, daß man aus Monofilen gezwirnte Fäden einwebt.The water retention capacity of the underlay can be increased if necessary by weaving threads twisted from monofilaments.

Die monofilen Fäden bestehen vorzugsweise aus einem Kunststoff wie PA 6.12 oder PA 6.10, der eine Wasseraufnahme unter 6 % besitzt.The monofilament threads are preferably made of a plastic such as PA 6.12 or PA 6.10, which has a water absorption of less than 6%.

Im folgenden ist die Erfindung anhand eines in der Zeichnung dargestellten Ausführungsbeispiels im einzelnen erläutert.
Es zeigen

Fig. 1
einen schematisch dargestellten Kettschnitt des Ausführungsbeispiels,
Fig. 2
einen schematisch dargestellten Schußschnitt des Ausführungsbeispiels.
The invention is explained in detail below using an exemplary embodiment shown in the drawing.
Show it
Fig. 1
1 shows a schematically illustrated chain section of the exemplary embodiment,
Fig. 2
a schematically illustrated shot section of the embodiment.

Ein mehrlagiges Pressensieb, das anstelle eines Pressenfilzes eine zu entwässernde Bahn beim Durchlauf durch eine Naßpresse einer Papier- oder Kartonmaschine trägt, besteht aus einem als Ganzes mit 1 bezeichneten Obergewebe, dessen Oberseite die Anlagefläche für die zu entwässernde Bahn bildet, einem als Ganzes mit 2 bezeichneten Untergewebe, das die Maschinenlaufseite des Pressensiebes bildet und einer zwischen beiden angeordneten Zwischenlage 10.A multi-layer press screen, which instead of a press felt carries a web to be dewatered when it passes through a wet press of a paper or board machine, consists of an upper fabric designated as a whole with 1, the upper side of which forms the contact surface for the web to be dewatered, one as a whole with 2 designated sub-fabric, which forms the machine running side of the press screen and an intermediate layer 10 arranged between the two.

Das Obergewebe 1 ist im Ausführungsbeispiel einlagig ausgeführt, kann aber auch mehrlagig sein. Im Falle einer mehrlagigen Ausbildung wäre die untere, an das Zwischengewebe 3 angrenzende Lage vorzugsweise so ausgeführt, daß ihr hydraulischer Entwässerungswiderstand größer ist als derjenige der oberen Lage. Die die Anlagefläche für die entwässernde Bahn bildende Seite des Obergewebes 1 ist monoplan.The upper fabric 1 is made in the embodiment, but can also be multi-layer. In the case of a multi-layer design, the lower layer adjacent to the intermediate fabric 3 would preferably be designed so that its hydraulic drainage resistance is greater than that of the upper layer. The side of the upper fabric 1 forming the contact surface for the draining web is monoplan.

Damit das Obergewebe 1 seine Offenheit nicht verliert und sein hydraulischer Entwässerungswiderstand unter Druckbelastung in einer Presse zumindest keine wesentliche Änderung erfährt, ist das obere Gewebe 1 formstabil ausgebildet. Hierzu ist zum einen eine Bindung in kurzer Flottierung gewählt. Zum anderen sind sowohl die Schußfäden 4 als auch die Kettfäden 5 monofile Fäden aus druckresistentem Kunststoff, wobei nicht nur solche mit kreisförmigem Querschnitt in Frage kommen, sondern auch solche mit demgegenüber vergrößerter Oberfläche, also beispielsweise monofile Fäden mit rechteckigem, ovalem oder hantelförmigem Querschnitt. Durch solche Querschnittsformen wird die spezifische Druckbelastung der Fäden reduziert und die effektive Größe der Anlagefläche für die zu entwässernde Bahn erhöht.So that the upper fabric 1 does not lose its openness and its hydraulic drainage resistance under pressure load in a press does not experience at least any significant change, the upper fabric 1 is dimensionally stable. For this purpose, a binding in short floatation is chosen. On the other hand, both the weft threads 4 and the warp threads 5 are monofilament threads made of pressure-resistant plastic, whereby not only those with a circular cross-section come into question, but also those with an enlarged surface, for example monofilament threads with a rectangular, oval or dumbbell-shaped cross-section. Such cross-sectional shapes reduce the specific pressure load on the threads and increase the effective size of the contact surface for the web to be dewatered.

Das Untergewebe 2 weist, wie Fig. 1 zeigt, eine aus Oberschüssen 6 bestehende obere Schußlage und eine aus Unterschüssen 7 bestehende untere Schußlage auf. Jeder der Unterschüsse 7 ist genau auf einen der Oberschüsse 6 ausgerichtet. Kettfäden 8 binden derart mit den Oberschüssen 6 und den Unterschüssen 7 ab, daß der hydraulische Entwässerungswiderstand der unteren Lage des Untergewebes 2 geringer ist als derjenige der oberen Lage. Im Ausführungsbeispiel ist deshalb die Einbindung der Kettfäden 8 in die untere Lage geringer als in die obere Lage. Außerdem ist die Bindung so gewählt, daß sie die Erreichung einer Formstabilität des Untergewebes 2 unter dem im Spalt einer Naßpresse herrschenden Druck unterstützt. In erster Linie wird die Formstabilität des Untergewebes 2, die sicherstellt, daß der für die Aufnahme von Wasser zur Verfügung gestellte Raum nicht im Pressenspalt wesentlich verringert wird, durch die Verwendung von monofilen Fäden erreicht. Dabei können diese Fäden statt des runden einen rechteckigen, ovalen oder hantelförmigen Querschnitt haben, wodurch die spezifische Druckbelastung der Fäden reduziert und die effektive Maschinenlauffläche vergrößert wird.As shown in FIG. 1, the lower fabric 2 has an upper weft layer consisting of upper wefts 6 and a lower weft layer consisting of lower wefts 7. Each of the sub-shots 7 is precisely aligned with one of the upper shots 6. Warp threads 8 bind with the upper wefts 6 and the lower wefts 7 in such a way that the hydraulic drainage resistance of the lower layer of the lower fabric 2 is lower than that of the upper layer. In the exemplary embodiment, the inclusion of the warp threads 8 in the lower layer is therefore less than in the upper layer. In addition, the binding is chosen so that it supports the achievement of a dimensional stability of the lower fabric 2 under the pressure prevailing in the nip of a wet press. First and foremost, the dimensional stability of the lower fabric 2, which ensures that the space made available for the absorption of water is not significantly reduced in the press nip, is achieved by using monofilament threads. These threads can have a rectangular, oval or dumbbell-shaped cross-section instead of the round one, which reduces the specific pressure load of the threads and increases the effective machine running surface.

Zwischen dem Obergewebe 1 und dem Untergewebe 2, die miteinander durch Bindeschüsse 9 verbunden sind, ist die Zwischenlage 10 angeordnet, die im Ausführungsbeispiel ausschließlich aus Schußfäden 11 besteht, die in einer einzigen Lage angeordnet sind. Es ist aber auch möglich, die Zwischenlage 10 aus Kettfäden zu bilden, wobei sowohl die Schußfäden als auch die Kettfäden mehrlagig angeordnet sein können. Ferner kann die Zwischenlage 10 aus einem ein- oder mehrlagigen Gewebe, also sowohl aus Schußfäden als auch aus Kettfäden, bestehen.Between the upper fabric 1 and the lower fabric 2, which are connected to one another by binding wefts 9, the intermediate layer 10 is arranged, which in the exemplary embodiment consists exclusively of weft threads 11, which are arranged in a single layer. However, it is also possible to form the intermediate layer 10 from warp threads, both the weft threads and the warp threads being able to be arranged in multiple layers. Furthermore, the intermediate layer 10 can consist of a single or multi-layer fabric, that is to say both of weft threads and of warp threads.

Im Ausführungsbeispiel sind alle Schußfäden 11 multifile Fäden. Werden auch monofile Fäden verwendet, dann folgen vorzugsweise monofile und multifile Fäden alternierend aufeinander. Monofile Fäden in der Zwischenlage 10 wirken sich positiv auf die angestrebte Inkompressibilität des gesamten Pressensiebes aus.In the exemplary embodiment, all weft threads 11 are multifilament threads. If monofilament threads are also used, then preferably monofilament and multifilament threads follow one another alternately. Monofilament threads in the intermediate layer 10 have a positive effect on the desired incompressibility of the entire press screen.

Die Zwischenlage 10 ist hochkapillar und für Wasser adhäsiv. Sie bildet deshalb im Abstand von der die Anlagefläche für die zu entwässernde Bahn bildenden Oberseite des Obergewebes 1 einen Wasserspeicher, welcher zwar eine sehr geringe Speicherkapazität hat, jedoch erst bei sehr hohen Kräften das in ihm gespeicherte Wasser abgibt. Die Zwischenlage 10 verhindert deshalb wirksam, daß das vom Pressensieb im Spalt einer Presse aufgenommene Wasser vorzeitig nach dem Verlassen des Pressenspaltes abgegeben wird, sei es durch Fliehkräfte bei einer Umlenkung durch eine Leitwalze, sei es durch eine Filmspaltung an einer Walzenoberfläche.The intermediate layer 10 is highly capillary and adhesive for water. It therefore forms a water reservoir at a distance from the top surface of the upper fabric 1 forming the contact surface for the web to be dewatered, which has a very small storage capacity, but only releases the water stored in it at very high forces. The intermediate layer 10 therefore effectively prevents the water taken up by the press screen in the nip of a press from being released prematurely after leaving the press nip, either by centrifugal forces when deflected by a guide roller or by film splitting on a roller surface.

Die Zwischenlage 10, welche die Wirkung einer verdichteten Gewebeschicht mit extrem hoher benetzbarer Oberfläche und feinkapillaren Maschenöffnungen hat, hat den höchsten hydraulischen Entwässerungswiderstand. Deshalb nimmt der hydraulische Entwässerungswiderstand von der die Anlagefläche für die zu entwässernde Bahn bildenden Oberseite des Obergewebes 1 zur Zwischenlage 10 hin zu, wo er seinen größten Wert hat, und nimmt dann wieder zur Maschinenlaufseite hin ab. Er ist deshalb mit einem Doppeltrichter vergleichbar. Entsprechend nimmt die Größe der der Entwässerung dienenden Öffnungen gemäß einem Doppeltrichter von der Anlagefläche für die zu entwässernde Bahn zur Zwischenlage 10 hin ab und dann wieder zur Maschinenlaufseite, also der Unterseite des Untergewebes 2 hin, zu.The intermediate layer 10, which has the effect of a compacted fabric layer with an extremely high wettable surface and fine capillary mesh openings, has the highest hydraulic drainage resistance. Therefore, the hydraulic drainage resistance of the contact surface for the web to be dewatered top of the upper fabric 1 to the intermediate layer 10 to where it has its greatest value, and then decreases again to the machine running side. It is therefore comparable to a double funnel. Correspondingly, the size of the openings serving for dewatering decreases according to a double funnel from the contact surface for the web to be dewatered to the intermediate layer 10 and then again to the machine running side, that is to say the underside of the lower fabric 2.

Claims (17)

  1. Multi-layer press sieve for wet-presses of a paper machine, characterised by a capillary and/or adhesive water reservoir (10) which is integrated into the fabric at a distance both from the supporting surface for the path from which water is to be removed and from the contact side of the machine.
  2. Press sieve according to Claim 1, characterised in that the water reservoir (10) is formed by additional threads (11) extending in the transverse direction of the sieve and/or in the longitudinal direction of the sieve.
  3. Press sieve according to Claim 2, characterised in that at least one part of the threads (11) of the water reservoir (10) are multi-filament threads, staple fibre threads, microthreads or multifilament profile threads.
  4. Press sieve according to Claim 2 or 3, characterised in that the threads (11) of the water reservoir (10) are disposed in one or more weft and/or warp positions.
  5. Press sieve according to any one of Claims 2 to 4, characterised in that, in the layer which forms the water reservoir, monofilament and multi-filament threads follow one another in an alternating manner.
  6. Press sieve according to any one of Claims 2 to 5, characterised in that the threads of the water reservoir (10) form a highly capillary fabric layer with a large wettable surface.
  7. Press sieve according to Claim 6, characterised in that the fabric layer forming the water reservoir is integrated in at least one of the positions of the press sieve.
  8. Press sieve according to Claim 6, characterised in that the fabric layer forming the water reservoir is disposed as an intermediate layer (10) below an upper fabric (1).
  9. Press sieve according to any one of Claims 1 to 8, characterised in that the permeability thereof to water reduces corresponding to a double funnel from the supporting surface for the path from which the water is to be removed towards the water reservoir, has the smallest value in the vicinity of the water reservoir and increases again from there towards the contact side of the machine.
  10. Press sieve according to any one of Claims 1 to 9 characterised in that the upper fabric (1) consists of pressure-resistant, monofilament threads (4,5).
  11. Press sieve according to any one of Claims 1 to 10, characterised in that the monofilament threads of the upper fabric (1) have a right-angled, oval or dumbbell-shaped cross-section.
  12. Press sieve according to any one of Claims 1 to 11, characterised in that a lower fabric (2) has a form stability which at least does not permit any substantial alteration of its hydraulic water-removing resistance.
  13. Press sieve according to any one of Claims 1 to 12, characterised in that at least the longitudinal threads of the lower fabric (2) are of monofilament threads consisting of pressure-resistant plastics material.
  14. Press sieve according to any one of Claims 1 to 13, characterised in that the monofilament longitudinal threads of the lower fabric (2) have a round, rectangular or oval cross-section.
  15. Press sieve according to any one of Claims 2 to 14, characterised in that the threads of the water reservoir are monofilament threads with a surface which is enlarged in relation to round threads, in particular monofilaments with star-shaped or cruciform cross-sections.
  16. Press sieve according to any one of Claims 1 to 15, characterised in that twisted threads are woven into the lower fabric consisting of monofibres.
  17. Press sieve according to one of Claims 1 to 16, characterised in that the monofilament threads which are used consist of a plastics material with an ability to absorb water of under 6%.
EP93113084A 1992-09-26 1993-08-16 Multi-layer pressfabric for the wetpress of a paper machine Expired - Lifetime EP0590288B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4232319A DE4232319A1 (en) 1992-09-26 1992-09-26 Multi-layer press screen for wet pressing of a paper machine
DE4232319 1992-09-26

Publications (2)

Publication Number Publication Date
EP0590288A1 EP0590288A1 (en) 1994-04-06
EP0590288B1 true EP0590288B1 (en) 1995-11-02

Family

ID=6468922

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93113084A Expired - Lifetime EP0590288B1 (en) 1992-09-26 1993-08-16 Multi-layer pressfabric for the wetpress of a paper machine

Country Status (10)

Country Link
US (1) US5601691A (en)
EP (1) EP0590288B1 (en)
JP (1) JPH06294089A (en)
AT (1) ATE129763T1 (en)
CA (1) CA2106362A1 (en)
DE (2) DE4232319A1 (en)
DK (1) DK0590288T3 (en)
ES (1) ES2079930T3 (en)
FI (1) FI97158C (en)
NO (1) NO304995B1 (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT400854B (en) * 1994-07-01 1996-04-25 Hutter & Schrantz Papiermaschi FABRICS FOR USE AS PAPER MACHINE COVERING
DE4423436A1 (en) * 1994-07-05 1996-01-11 Franz F Kufferath Extraction of water from paper web after the fourdrinier section
DE9416520U1 (en) * 1994-10-14 1996-02-15 Württembergische Filztuchfabrik D. Geschmay GmbH, 73035 Göppingen Press felt for drainage
US5651394A (en) * 1996-02-02 1997-07-29 Huyck Licensco, Inc. Papermakers fabric having cabled monofilament oval-shaped yarns
GB9609761D0 (en) * 1996-05-10 1996-07-17 Jwi Ltd Low air permeability papermaking fabric including flattened secondary weft yarns and pin seam
US5787936A (en) * 1996-11-22 1998-08-04 Asten, Inc. Laminated papermaker's fabric having projecting seaming loops
US6030908A (en) * 1998-03-16 2000-02-29 Jwi Ltd. Multilayer porous fabric
DE19859582A1 (en) * 1998-12-22 2000-06-29 Voith Fabrics Heidenheim Gmbh Three or multi-layer paper machine screen in the form of a composite fabric
JP3938817B2 (en) * 1999-02-16 2007-06-27 日本フイルコン株式会社 Industrial fabric joining loop and joints using this loop
US6331341B1 (en) 1999-07-09 2001-12-18 Albany International Corp. Multiaxial press fabric having shaped yarns
US7059361B1 (en) * 2005-04-28 2006-06-13 Albany International Corp. Stable forming fabric with high fiber support
JP4828330B2 (en) * 2006-07-07 2011-11-30 日本フイルコン株式会社 Press fabric for pulp machine
CA2600307A1 (en) * 2007-09-07 2009-03-07 Ralph Roemer Fabric for producing spunmelt or airlaid nonwovens including profiled yarns for soil release and contamination resistance
GB2495397A (en) * 2011-10-03 2013-04-10 Itex Fabrics Ltd Layered textile material and method of formation
US10858766B2 (en) * 2013-07-31 2020-12-08 Nippon Filcon Co., Ltd. Industrial fabric
DE202013104888U1 (en) 2013-10-31 2015-02-02 Heimbach Gmbh & Co. Kg Breathable covering for paper or pulp dewatering machines and their use
DE102018123390A1 (en) 2018-09-24 2020-03-26 Voith Patent Gmbh Machine and method for producing a fibrous web
DE102018123389A1 (en) * 2018-09-24 2020-02-13 Voith Patent Gmbh Machine and method for producing a fibrous web

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3158984A (en) * 1962-08-10 1964-12-01 Lindsay Wire Weaving Co Porous fabric or structure and the method of making the same
US4162190A (en) * 1974-04-29 1979-07-24 Scapa-Porritt Limited Paper makers wet felts
US4199401A (en) * 1979-03-01 1980-04-22 Asten Group, Inc. Felt for papermaking machine
US4361618A (en) * 1981-05-18 1982-11-30 Ascoe Felts, Inc. Papermakers felt with improved drainage
US4633596A (en) * 1981-09-01 1987-01-06 Albany International Corp. Paper machine clothing
US4503113A (en) * 1982-03-12 1985-03-05 Huyck Corporation Papermaker felt with a three-layered base fabric
US4414263A (en) * 1982-07-09 1983-11-08 Atlanta Felt Company, Inc. Press felt
US4799998A (en) * 1983-08-01 1989-01-24 Albany International Corp. Papermachine clothing
FI72362C (en) * 1983-10-03 1987-05-11 Tamfelt Oy Ab FOERFARANDE OCH MEDEL FOER ATT AOSTADKOMMA AVLAEGSNANDE AV VATTEN I EN PRESS VID EN PAPPERSMASKIN.
US4533594A (en) * 1983-12-16 1985-08-06 Porritts & Spencer Batt-on-mesh felt employing polyurethane-coated multifilaments in the cross-machine direction
US4520059A (en) * 1983-12-16 1985-05-28 Engineered Yarns, Inc. Ionomer-coated yarns and their use in papermakers wet press felts
DE3426264A1 (en) * 1984-07-17 1986-01-30 Franz F. 5160 Düren Kufferath DRAINAGE TAPE FOR PRESSES IN THE WET OF A PAPER MACHINE
CA1277209C (en) * 1986-11-28 1990-12-04 Dale B. Johnson Composite forming fabric
US4705601A (en) * 1987-02-05 1987-11-10 B.I. Industries, Inc. Multi-ply paper forming fabric with ovate warp yarns in lowermost ply
FI78329B (en) * 1987-02-10 1989-03-31 Tamfelt Oy Ab PAPPERSMASKINDUK.
EP0346307A3 (en) * 1988-06-09 1991-03-06 Nordiskafilt Ab Wet press felt to be used in a papermaking machine
US4943476A (en) * 1988-10-27 1990-07-24 Albany International Corp. Water removal on papermachine through riblet effect
DE4002761A1 (en) * 1990-01-31 1991-08-01 Heimbach Gmbh Thomas Josef PRESS FELT
US5097872A (en) * 1990-12-17 1992-03-24 Tamfelt, Inc. Woven work fabric with X-shaped monofilament yarns
DE4040861C3 (en) * 1990-12-20 2001-02-01 Conrad Munzinger & Cie Ag Olte Press felt and process for its production
US5360518A (en) * 1991-12-18 1994-11-01 Albany International Corp. Press fabrics for paper machines
US5366798A (en) * 1993-11-30 1994-11-22 Wangner Systems Corporation Multi-layered papermaking fabric having stabilized stacked weft yarn

Also Published As

Publication number Publication date
NO933412D0 (en) 1993-09-24
US5601691A (en) 1997-02-11
FI934148A (en) 1994-03-27
FI97158C (en) 1996-10-25
CA2106362A1 (en) 1994-03-27
DE59300854D1 (en) 1995-12-07
NO304995B1 (en) 1999-03-15
ATE129763T1 (en) 1995-11-15
DE4232319A1 (en) 1994-03-31
NO933412L (en) 1994-03-28
FI97158B (en) 1996-07-15
JPH06294089A (en) 1994-10-21
EP0590288A1 (en) 1994-04-06
FI934148A0 (en) 1993-09-22
ES2079930T3 (en) 1996-01-16
DK0590288T3 (en) 1996-03-04

Similar Documents

Publication Publication Date Title
EP0590288B1 (en) Multi-layer pressfabric for the wetpress of a paper machine
DE3224187C2 (en) Bandage fabric as a covering for the sheet forming area of a paper machine
EP0116945B1 (en) Covering cloth for the wet end of a papermaking machine
EP0168718B2 (en) Drainage fabric for presses in the wet end section of a paper machine
EP0432413B1 (en) Compound tissue for paper-making machine fabrics
EP0264881B1 (en) Fabric for the wet end of a paper-making machine
EP1294981B1 (en) Paper making wire cloth
DE2435376C2 (en) Paper machine felt
EP0048962A2 (en) Two-layered sieve for the sheet forming zone of a paper machine
EP2470716B1 (en) Forming fabric
DE2853564C2 (en) Single-ply paper machine fabric for the wet end of a paper machine
DE602004009179T2 (en) PAPER MACHINE COVERING
EP1565613B1 (en) Papermaking screen
EP2205791B1 (en) Forming screen
EP2067895B1 (en) Forming fabric for use in a paper making machine
EP1738020B1 (en) Wire cloth, in particular paper making wire cloth
DE2455185A1 (en) FABRIC FOR THE MAKING OF PAPER
DE2847327C3 (en)
DE102011054163B3 (en) papermaker
EP2004903B1 (en) Upper side, in particular paper side, for a paper machine forming fabric and paper machine forming fabric
DE4002761C2 (en)
WO2003014447A1 (en) Fabric belt for a corrugated board gluing machine
EP0131940A2 (en) Multi-layer screen cloth, in particular for the wet end of a paper-making machine
AT394869B (en) FABRICS FOR USE AS PAPER MACHINE COVERING
DE7438850U (en) Fabric web for the manufacture of paper

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB IT LI NL PT SE

17P Request for examination filed

Effective date: 19940507

17Q First examination report despatched

Effective date: 19950126

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE DK ES FR GB IT LI NL PT SE

REF Corresponds to:

Ref document number: 129763

Country of ref document: AT

Date of ref document: 19951115

Kind code of ref document: T

REF Corresponds to:

Ref document number: 59300854

Country of ref document: DE

Date of ref document: 19951207

ET Fr: translation filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2079930

Country of ref document: ES

Kind code of ref document: T3

ITF It: translation for a ep patent filed

Owner name: MODIANO & ASSOCIATI S.R.L.

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: ISLER & PEDRAZZINI AG PATENTANWAELTE

SC4A Pt: translation is available

Free format text: 951207 AVAILABILITY OF NATIONAL TRANSLATION

REG Reference to a national code

Ref country code: DK

Ref legal event code: T3

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19960220

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

REG Reference to a national code

Ref country code: CH

Ref legal event code: PCAR

Free format text: ISLER & PEDRAZZINI AG;POSTFACH 1772;8027 ZUERICH (CH)

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20090909

Year of fee payment: 17

Ref country code: DK

Payment date: 20090930

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: PT

Payment date: 20090908

Year of fee payment: 17

Ref country code: NL

Payment date: 20090929

Year of fee payment: 17

Ref country code: GB

Payment date: 20090915

Year of fee payment: 17

Ref country code: CH

Payment date: 20090910

Year of fee payment: 17

Ref country code: AT

Payment date: 20090910

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20090929

Year of fee payment: 17

Ref country code: DE

Payment date: 20091001

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20090922

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20090930

Year of fee payment: 17

Ref country code: FR

Payment date: 20091016

Year of fee payment: 17

REG Reference to a national code

Ref country code: PT

Ref legal event code: MM4A

Free format text: LAPSE DUE TO NON-PAYMENT OF FEES

Effective date: 20110216

BERE Be: lapsed

Owner name: *KUFFERATH FRANZ-FERDINAND

Effective date: 20100831

REG Reference to a national code

Ref country code: NL

Ref legal event code: V1

Effective date: 20110301

REG Reference to a national code

Ref country code: DK

Ref legal event code: EBP

EUG Se: european patent has lapsed
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20100816

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF THE APPLICANT RENOUNCES

Effective date: 20100810

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100831

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100831

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20110502

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100816

Ref country code: PT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110216

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110301

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100816

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100831

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100831

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100816

Ref country code: DK

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100831

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20111019

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100817

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100817