EP0144529A2 - Multilayer cloth for a paper-making machine - Google Patents

Multilayer cloth for a paper-making machine Download PDF

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Publication number
EP0144529A2
EP0144529A2 EP84109662A EP84109662A EP0144529A2 EP 0144529 A2 EP0144529 A2 EP 0144529A2 EP 84109662 A EP84109662 A EP 84109662A EP 84109662 A EP84109662 A EP 84109662A EP 0144529 A2 EP0144529 A2 EP 0144529A2
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EP
European Patent Office
Prior art keywords
threads
binding
structural
fabric layer
cross
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP84109662A
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German (de)
French (fr)
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EP0144529B1 (en
EP0144529A3 (en
Inventor
Georg Dipl.-Ing. Borel
Bengt Jonsson
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.)
Herman Wangner GmbH and Co KG
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Herman Wangner GmbH and Co KG
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Publication date
Application filed by Herman Wangner GmbH and Co KG filed Critical Herman Wangner GmbH and Co KG
Priority to AT84109662T priority Critical patent/ATE31562T1/en
Publication of EP0144529A2 publication Critical patent/EP0144529A2/en
Publication of EP0144529A3 publication Critical patent/EP0144529A3/en
Application granted granted Critical
Publication of EP0144529B1 publication Critical patent/EP0144529B1/en
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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
    • D21F1/0027—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
    • Y10S162/903—Paper forming member, e.g. fourdrinier, sheet forming member
    • 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]
    • Y10T442/3179—Woven fabric is characterized by a particular or differential weave other than fabric in which the strand denier or warp/weft pick count is specified
    • Y10T442/3195—Three-dimensional weave [e.g., x-y-z planes, multi-planar warps and/or wefts, etc.]

Definitions

  • the invention relates to a covering for paper machines made of a fabric with two or more fabric layers, each of which is a complete fabric made of interwoven structural longitudinal and transverse threads.
  • the individual fabric layers are connected to each other by additional binding cross threads.
  • the coverings are in particular those for the sheet formation area of a paper machine.
  • Such coverings for paper machines are known from DE-OSes 24 55 184, 24 55 185 and 29 17 694.
  • the binding transverse threads pose difficulties; If the binding cross threads are woven in with high tension and accordingly bind the two fabric layers tightly to one another, deep troughs occur at the binding points of the upper fabric layer. H. on the paper side. If, on the other hand, the bandage transverse threads are loosely woven in, they are rubbed through relatively quickly, both on the running side and between the fabric layers.
  • the invention has for its object to provide a covering of the type mentioned for paper machines in which the binding cross thread on the one hand does not cause troughs on the paper side and on the other hand is not prematurely rubbed on the running side or between the fabric layers.
  • binding cross threads between the double structural cross threads and the respective longitudinal thread is further improved in that the binding cross thread has a smaller diameter than the double structural cross threads.
  • Claim 3 is directed to a paper machine clothing in which both inventions are realized.
  • the covering according to the invention is generally only two layers, the upper fabric layer being finer woven than the lower fabric layer.
  • the warp number and the weft number of the lower fabric layer is that the running side is only half as large as that of the upper fabric layer.
  • the covering according to the invention usually consists of plastic wires made of the usual material for paper machine clothing, e.g. B. polyester and polyamide.
  • the covering can be open or endless woven. In the open weave, the cross threads are the weft threads, while in the endless weave they are the warp threads.
  • the basic idea of the invention can also be applied to longitudinal threads of the binding, in which case the longitudinal threads which bind together with them are each duplicated.
  • a binding transverse thread 3 also binds with the longitudinal thread 1.
  • the binding transverse thread 3 has a substantially smaller diameter than the structural transverse thread 2.
  • the central axes of the binding transverse thread 3 and the structural transverse thread 2 are approximately at the same height, i. that is, after a relatively short period of time, the binding cross thread 3 is also exposed to wear. Because of its smaller diameter, it will be destroyed in front of the structural cross thread 2.
  • By tightening the binding cross thread tighter it can be slightly raised, i. H. are shifted towards the paper side, but then he exercises too strong downwards on the longitudinal threads with which he is tied in the upper fabric layer, i. H. directed force towards the running side, so that troughs form in the upper fabric layer and the marking properties of the covering are impaired.
  • binding cross thread With some bindings, e.g. B. three-twill weaves and drap weaves, it is possible to arrange the binding cross thread on the running side between two structural cross threads of the lower fabric layer, as shown in Fig. 2.
  • the binding cross thread is then largely removed from abrasion, but has no lateral hold. Its mobility transversely to its longitudinal direction enables the two fabric layers to be displaced relative to one another, which leads to unnecessary wear on the adjoining surfaces of the two fabric layers.
  • the structural transverse threads 2 are each arranged in pairs, and the binding transverse thread 3 is pressed onto the highest point of the arch of the structural longitudinal thread 1 without any particular tension being exerted on it. At this point it is removed from abrasion. This means an increase in the running time of the paper machine clothing, since the material of the structural longitudinal and transverse threads of the lower fabric layer is completely used up without the two fabric layers separating.
  • the binding cross thread 3 exerts a lower, downward force on the structural longitudinal threads with which it is interwoven in the upper fabric layer, so that there are no or only slight troughs on the paper side.
  • the paper machine screen consists of two fabric layers, which are complete fabrics in themselves and are connected to each other with the help of additional connecting weft wires.
  • Both fabric layers are woven open, so that the warp wires are the longitudinal threads and the weft threads are the transverse threads.
  • the upper fabric layer has a plain weave and shows 28 warp wires per cm.
  • the warp wires have a diameter of 0.17 mm and are made of polyester monofilament, type Trevira 940.
  • the number of wefts in the upper fabric layer is 24 weft wires per cm.
  • the weft wires have a diameter of 0.20 mm and are made of polyester monofilament, type Trevira 900.
  • the lower fabric layer also has a plain weave and has 14 warp wires per cm.
  • the warp wires have a diameter of 0.30 mm and are made of polyester monofilament, type Trevira 940.
  • All weft wires in the lower fabric layer are designed as double wires and the weft density is 12 wire pairs per cm, i.e. 24 individual wires per cm.
  • the diameter of the weft wires is 0.25 mm in each case.
  • the material of the two individual wires of each pair of weft wires is different and one weft wire is made of polyester monofilament, type Trevira 900 and the other of polyamide 6.6 monofilament.
  • the binding weft wires that connect the two fabric layers with each other have a diameter of 0.17 mm and are made of polyester monofilament, type Trevira 900.
  • the binding weft wires are woven in after every fourth weft wire of the upper fabric layer.
  • the tying points are diagonally offset from each other in the direction of travel, so that the binding weft only binds to the same warp wire of the upper fabric layer again after 12 weft wires of the upper fabric layer.
  • the use of double weft wires in the lower three layers of fabric binds the binding weft wire between the two weft wires of a pair of weft wires and the warp wire, as shown in FIG. 3.
  • the two weft wires of the pair press the binding weft wire into the warp wire in the lower fabric layer so that all three weft wires are jointly involved in the deformation of the warp wire.
  • the binding weft wire is embedded in the warp wire at a relatively large distance from the abrasion plane.
  • the two structural weft wires of the lower fabric layer are first looped through. Then the warp wires of the lower fabric layer loop through. In this way, the binding weft wires can hold together the remnants of the warp wires of the lower fabric layer, that is, even if the running side of the paper machine screen has already been ground through.

Abstract

A clothing for use in a papermaking machine wherein the fabric includes two or more fabric layers, each layer comprised of woven structural longitudinal and transverse threads and each interconnected by additional transverse binder threads, and wherein at least the structural transverse threads of the lower fabric layer jointly interwoven with the transverse binder threads are arranged in pairs or as twin threads.

Description

Die Erfindung betrifft eine Bespannung für Papiermaschinen aus einem Gewebe mit zwei oder mehr Gewebelagen, die jeweils in sich vollständige Gewebe aus miteinander verwobenen strukturellen Längs- und Querfäden sind. Die einzelnen Gewebelagen sind durch zusätzliche Binde-Querfäden miteinander verbunden. Bei den Bespannungen handelt es sich insbesondere um solche für den Blattbildungsbereich einer Papiermaschine.The invention relates to a covering for paper machines made of a fabric with two or more fabric layers, each of which is a complete fabric made of interwoven structural longitudinal and transverse threads. The individual fabric layers are connected to each other by additional binding cross threads. The coverings are in particular those for the sheet formation area of a paper machine.

Derartige Bespannungen für Papiermaschinen, insbesondere für deren Blattbildungsbereich sind aus den DE-OSen 24 55 184, 24 55 185 und 29 17 694 bekannt. In der Praxis ergeben sich durch die Binde-Querfäden Schwierigkeiten; werden die Binde-Querfäden mit hoher Spannung eingewoben und binden dementsprechend die beiden Gewebelagen fest aneinander, so entstehen tiefe Mulden an den Abbindestellen der oberen Gewebelage, d. h. auf der Papierseite. Werden die Binde-Querfäden dagegen locker eingewoben, so werden sie relativ rasch durchgerieben, und zwar sowohl auf der Laufseite als auch zwischen den Gewebelagen.Such coverings for paper machines, in particular for their sheet formation area, are known from DE-OSes 24 55 184, 24 55 185 and 29 17 694. In practice, the binding transverse threads pose difficulties; If the binding cross threads are woven in with high tension and accordingly bind the two fabric layers tightly to one another, deep troughs occur at the binding points of the upper fabric layer. H. on the paper side. If, on the other hand, the bandage transverse threads are loosely woven in, they are rubbed through relatively quickly, both on the running side and between the fabric layers.

Der Erfindung liegt die Aufgabe zugrunde, eine Bespannung der eingangs genannten Art für Papiermaschinen zu schaffen, bei der der Binde-Querfaden einerseits keine Mulden auf der Papierseite verursacht und andererseits nicht vorzeitig auf der Laufseite oder zwischen den Gewebelagen durchgerieben wird.The invention has for its object to provide a covering of the type mentioned for paper machines in which the binding cross thread on the one hand does not cause troughs on the paper side and on the other hand is not prematurely rubbed on the running side or between the fabric layers.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß zumindest diejenigen strukturellen Querfäden der untersten Gewebelage, die gemeinsam mit den Binde-Querfäden abbinden, doppelt ausgeführt sind. Dadurch wird erreicht, daß der Binde-Querfaden in der untersten Gewebelage zwischen den doppelt ausgeführten strukturellen Querfäden und dem jeweils abgebundenen strukturellen Längsfaden eingeschlossen werden.This object is achieved in that at least those structural transverse threads of the lowest fabric layer, which bind together with the binding transverse threads, are designed in duplicate. It is thereby achieved that the binding cross thread is enclosed in the lowermost fabric layer between the double structural cross threads and the structural longitudinal thread that has been set.

Der Einschluß der Binde-Querfäden zwischen den doppelt ausgeführten strukturellen Querfäden und dem jeweiligen Längsfaden wird noch dadurch verbessert, daß der Binde-Querfaden einen kleineren Durchmesser aufweist als die doppelt ausgeführten strukturellen Querfäden.The inclusion of the binding cross threads between the double structural cross threads and the respective longitudinal thread is further improved in that the binding cross thread has a smaller diameter than the double structural cross threads.

Durch den Einschluß der Binde-Querfäden ergibt sich die Möglichkeit, diese Fäden mit wesentlich geringerer Zugspannung zu verarbeiten, sei es durch den flacheren Verlauf der Binde-Querfäden, sei es durch die Wahl eines leichter dehnbaren Werkstoffes. Da die senkrechte Kraftkomponente für die Muldenbildung auf der Papierseite verantwortlich ist, führt dieser flachere Verlauf der Binde-Querfäden zu besseren Markierungseigenschaften der Papiermaschinenbespannung.Uerfäden by the inclusion of connective Q results in the ability to process these threads with substantially less tension, whether through the flatter course of the binding cross threads, either by choosing a lighter stretchable material. D is a vertical force component for the trough formation on the paper side responsible for this flatter course of the binding cross threads leads to better marking properties of the P apiermaschinenbespannung.

Die vorliegende Erfindung läßt sich in idealer Weise mit der Erfindung kombinieren, die in der gleichzeitig eingereichten Anmeldung (= DE 33 29 740.1-26) beschrieben ist. Anspruch 3 ist auf eine Papiermaschinenbespannung gerichtet, in der beide Erfindungen verwirklicht sind.The present invention can be ideally combined with the invention described in the application filed at the same time (= DE 33 29 740.1-26). Claim 3 is directed to a paper machine clothing in which both inventions are realized.

Die erfindungsgemäße Bespannung ist im allgemeinen nur zweilagig, wobei die obere Gewebelage feiner gewoben ist als die untere Gewebelage. Normalerweise ist die Kettzahl und die Schußzahl der unteren Gewebelage, die die Laufseite bildet, nur halb so groß wie die der oberen Gewebelage.The covering according to the invention is generally only two layers, the upper fabric layer being finer woven than the lower fabric layer. Usually the warp number and the weft number of the lower fabric layer is that the running side is only half as large as that of the upper fabric layer.

Die erfindungsgemäße Bespannung besteht normalerweise aus Kunststoffdrähten aus dem für Papiermaschinenbespannungen üblichen Material, z. B. Polyester-und Polyamid. Die Bespannung kann offen oder endlos gewebt sein. Bei der offenen Webart sind die Querfäden die Schußfäden, während sie bei der endlosen Webart die Kettfäden sind.The covering according to the invention usually consists of plastic wires made of the usual material for paper machine clothing, e.g. B. polyester and polyamide. The covering can be open or endless woven. In the open weave, the cross threads are the weft threads, while in the endless weave they are the warp threads.

Der Grundgedanke der Erfindung läßt sich auch auf Binde-Längsfäden anwenden, wobei dann jeweils die gemeinsam mit ihnen abbindenden Längsfäden doppelt ausgeführt sind.The basic idea of the invention can also be applied to longitudinal threads of the binding, in which case the longitudinal threads which bind together with them are each duplicated.

Daß erfindungsgemäß bestimmte strukturelle Querfäden doppelt ausgeführt sind, bedeutet, daß anstelle eines einzelnen Querfadens zwei parallel verlaufende Querfäden gesetzt sind. Der Gesamtquerschnitt der doppelt ausgeführten strukturellen Querfäden entspricht dabei etwa der Querschnittsfläche eines einzelnen strukturrellen Querfadens nach dem Stand der Technik bei einem ansonsten vergleichbaren Papiermaschinensieb.The fact that certain structural transverse threads are designed in accordance with the invention means that two parallel transverse threads are set instead of a single transverse thread. The total cross-section of the double structural cross-threads corresponds approximately to the cross-sectional area of a single structural cross-thread according to the prior art in an otherwise comparable paper machine wire.

Der Stand der Technik und Ausführungsbeispiele der Erfindung werden nachfolgend anhand der Zeichnung erläutert. Es zeigen:

  • Fig. 1 die Anordnung von Binde-Querfaden und strukturellem Querfaden in der unteren Gewebelage gemäß dem Stand der Technik;
  • Fig. 2 die Anordnung von Binde-Querfaden und strukturellen Querfäden in der unteren Gewebelage bei einer Dreiköperbindung und
  • Fig. 3 die erfindungsgemäße Anordnung eines Rinde-Querfadens und der doppelt ausgeführten strukturellen Querfäden.
The prior art and exemplary embodiments of the invention are explained below with reference to the drawing. Show it:
  • Figure 1 shows the arrangement of binding cross thread and structural cross thread in the lower fabric layer according to the prior art.
  • Fig. 2 shows the arrangement of binding cross thread and structural cross threads in the lower fabric layer with a three-twill weave and
  • Fig. 3 shows the inventive arrangement of a bark cross thread and the double structural cross threads.

In der Zeichnung ist jeweils nur die untere Gewebelage eines insgesamt zweilagigen Gewebes dargestellt. Bezüglich der oberen Gewebelage ist der Verlauf der Fäden wie beim Stand der Technik, allerdings sind die Markierungseigenschaften verbessert.In the drawing, only the lower fabric layer of a two-layer fabric is shown. With regard to the upper fabric layer, the course of the threads is the same as in the prior art, but the marking properties are improved.

Fig. 1 zeigt die Abbindung eines Einzel-Querfadens 2 mit einem Längsfaden 1. An der gleichen Stelle bindet auch ein Binde-Querfaden 3 mit dem Längsfaden 1 ab. Wie üblich, hat der Binde-Querfaden 3 einen wesentlich kleineren Durchmesser als der strukturelle Querfaden 2. Die Mittelachsen des Binde-Querfadens 3 und des strukturellen Querfadens 2 liegen etwa auf gleicher Höhe, d. h., daß nach relativ kurzer Laufzeit auch der Binde-Querfaden 3 dem Abrieb ausgesetzt wird. Wegen seines kleineren Durchmessers wird er dabei vor dem strukturellen Querfaden 2 zerstört sein. Durch ein strafferes Einweben des Binde-Querfadens kann er zwar etwas angehoben werden, d. h. zur Papierseite hin verlagert werden, er übt dann jedoch auf die Längsfäden, mit denen er in der oberen Gewebelage abgebunden ist, eine zu starke nach unten, d. h. zur Laufseite hin, gerichtete Kraft aus, so daß sich in der oberen Gewebelage Mulden bilden und die Markierungseigenschaften der Bespannung beeinträchtigt werden.1 shows the binding of a single transverse thread 2 with a longitudinal thread 1. At the same point, a binding transverse thread 3 also binds with the longitudinal thread 1. As usual, the binding transverse thread 3 has a substantially smaller diameter than the structural transverse thread 2. The central axes of the binding transverse thread 3 and the structural transverse thread 2 are approximately at the same height, i. that is, after a relatively short period of time, the binding cross thread 3 is also exposed to wear. Because of its smaller diameter, it will be destroyed in front of the structural cross thread 2. By tightening the binding cross thread tighter, it can be slightly raised, i. H. are shifted towards the paper side, but then he exercises too strong downwards on the longitudinal threads with which he is tied in the upper fabric layer, i. H. directed force towards the running side, so that troughs form in the upper fabric layer and the marking properties of the covering are impaired.

Bei einigen Bindungen, z. B. Dreiköper-Bindungen und Drap-Bindungen, besteht die Möglichkeit, den Binde-Querfaden auf der Laufseite zwischen zwei strukturellen Querfäden der unteren Gewebelage anzuordnen, wie es in Fig. 2 gezeigt ist. Der Binde-Querfaden ist dann zwar dem Abrieb weitgehend entzogen, hat jedoch keinen seitlichen Halt. Seine Beweglichkeit quer zu seiner Längsrichtung ermöglicht eine Verschiebung der beiden Gewebelagen zueinander, was zu einem unnötigen Verschleiß der aneinandergrenzenden Flächen der beiden Gewebelagen führt.With some bindings, e.g. B. three-twill weaves and drap weaves, it is possible to arrange the binding cross thread on the running side between two structural cross threads of the lower fabric layer, as shown in Fig. 2. The binding cross thread is then largely removed from abrasion, but has no lateral hold. Its mobility transversely to its longitudinal direction enables the two fabric layers to be displaced relative to one another, which leads to unnecessary wear on the adjoining surfaces of the two fabric layers.

Fig. 3 zeigt ein.Ausführungsbeispiel der Erfindung. Die strukturellen Querfäden 2 sind jeweils paarweise angeordnet, und der Binde-Querfaden 3 wird, ohne daß auf ihn eine besondere Spannung ausgeübt wird, an die höchste Stelle des Bogens des strukturellen Längsfadens 1 gedrückt. Er ist an dieser Stelle dem Abrieb entzogen. Dies bedeutet eine Erhöhung der Laufzeit der Papiermaschinenbespannung, da das Material der strukturellen Längs- und Querfäden der unteren Gewebelage restlos verbraucht wird, ohne daß sich die beiden Gewebelagen trennen.3 shows an embodiment of the invention. The structural transverse threads 2 are each arranged in pairs, and the binding transverse thread 3 is pressed onto the highest point of the arch of the structural longitudinal thread 1 without any particular tension being exerted on it. At this point it is removed from abrasion. This means an increase in the running time of the paper machine clothing, since the material of the structural longitudinal and transverse threads of the lower fabric layer is completely used up without the two fabric layers separating.

Infolge der geringen Zugspannung, die im Binde-Querfaden 3 vorhanden ist und wegen dessen flacherem Verlauf übt der Binde-Querfaden 3 auf die strukturellen Längsfäden, mit denen er in der oberen Gewebelage verwoben ist, eine geringere, nach unten gerichtete Kraft aus, so daß keine oder nur geringfügige Mulden auf der Papierseite entstehen.As a result of the low tensile stress that is present in the binding cross thread 3 and because of its flatter course, the binding cross thread 3 exerts a lower, downward force on the structural longitudinal threads with which it is interwoven in the upper fabric layer, so that there are no or only slight troughs on the paper side.

Beispiel:Example:

Das Papiermaschinensieb besteht aus zwei Gewebelagen, die in sich vollständige Gewebe sind und mit Hilfe von zusätzlichen Bindeschußdrähten miteinander verbunden sind.The paper machine screen consists of two fabric layers, which are complete fabrics in themselves and are connected to each other with the help of additional connecting weft wires.

Beide Gewebelagen sind offen gewoben, so daß die Kettdrähte die Längsfäden und die Schußfäden die Querfäden sind.Both fabric layers are woven open, so that the warp wires are the longitudinal threads and the weft threads are the transverse threads.

Die obere Gewebelage besitzt Leinwandbindung und weist 28 Kettdrähte je cm auf. Die Kettdrähte haben einen Durchmesser von 0,17 mm und bestehen aus Polyester-Monofil, Type Trevira 940. Die Schußzahl der oberen Gewebelage beträgt 24 Schußdrähte je cm. Die Schußdrähte haben einen Durchmesser von 0,20 mm und bestehen aus Polyester-Monofil, Type Trevira 900.The upper fabric layer has a plain weave and shows 28 warp wires per cm. The warp wires have a diameter of 0.17 mm and are made of polyester monofilament, type Trevira 940. The number of wefts in the upper fabric layer is 24 weft wires per cm. The weft wires have a diameter of 0.20 mm and are made of polyester monofilament, type Trevira 900.

Die untere Gewebelage besitzt ebenfalls Leinwandbindung und weist 14 Kettdrähte je cm auf. Die Kettdrähte haben einen Durchmesser von 0,30 mm und bestehen aus Polyester-Monofil, Type Trevira 940. Alle Schußdrähte der unteren Gewebelage sind als Doppeldrähte ausgebildet und die Schußdichte beträgt 12 Drahtpaare je cm, d.h. 24 Einzeldrähte je cm. Der Durchmesser der Schußdrähte beträgt jeweils 0,25 mm. Das Material der beiden Einzeldrähte jedes Schußdrahtpaares ist unterschiedlich und der eine Schußdraht besteht aus Polyester-Monofil, Type Trevira 900 und der andere aus Polyamid-6.6-Monofil.The lower fabric layer also has a plain weave and has 14 warp wires per cm. The warp wires have a diameter of 0.30 mm and are made of polyester monofilament, type Trevira 940. All weft wires in the lower fabric layer are designed as double wires and the weft density is 12 wire pairs per cm, i.e. 24 individual wires per cm. The diameter of the weft wires is 0.25 mm in each case. The material of the two individual wires of each pair of weft wires is different and one weft wire is made of polyester monofilament, type Trevira 900 and the other of polyamide 6.6 monofilament.

Die Binde-Schußdrähte, die die beiden Gewebelagen miteinander verbinden, haben einen Durchmesser von 0,17 mm, und bestehen aus Polyester-Monofil, Type Trevira 900. Die Binde-Schußdrähte werden nach jedem vierten Schußdraht der oberen Gewebelage eingewoben. Die Abbindestellen sind in Laufrichtung diagonal gegeneinander versetzt, so daß erst wieder nach 12 Schußdrähten der oberen Gewebelage der Bindeschuß an dem gleichen Kettdraht der oberen Gewebelage abbindet.The binding weft wires that connect the two fabric layers with each other have a diameter of 0.17 mm and are made of polyester monofilament, type Trevira 900. The binding weft wires are woven in after every fourth weft wire of the upper fabric layer. The tying points are diagonally offset from each other in the direction of travel, so that the binding weft only binds to the same warp wire of the upper fabric layer again after 12 weft wires of the upper fabric layer.

Durch die Verwendung doppelt ausgeführter Schußdrähte in 3er unteren Gewebelage ist der Binde-Schußdraht zwischen den beiden Schußdrähten eines Schußdrahtpaares und dem Kettdraht eingeschlossen, wie es in Fig. 3 dargestellt ist. Die beiden Schußdrähte des Paares drücken in der unteren Gewebelage den Binde-Schußdraht in den Kettdraht hinein, so daß alle drei Schußdrähte gemeinsam an der Verformung des Kettdrahtes beteiligt sind. Dadurch wird der Binde-Schußdraht mit relativ großem Abstand von der Abriebebene in den Kettdraht eingebettet. Beim Durchschliff des Papiermaschinensiebes werden zuerst die beiden strukturellen Schußdrähte der unteren Gewebelage durchgeschliffen. Danach schleifen sich die Kettdrähte der unteren Gewebelage durch. Die Binde-Schußdrähte können auf diese Weise bis zuletzt die Reste der Kettdrähte der unteren Gewebelage zusammenhalten, also selbst dann noch, wenn die Laufseite des Papiermaschinensiebes bereits durchgeschliffen worden ist.The use of double weft wires in the lower three layers of fabric binds the binding weft wire between the two weft wires of a pair of weft wires and the warp wire, as shown in FIG. 3. The two weft wires of the pair press the binding weft wire into the warp wire in the lower fabric layer so that all three weft wires are jointly involved in the deformation of the warp wire. As a result, the binding weft wire is embedded in the warp wire at a relatively large distance from the abrasion plane. When grinding through the paper machine screen, the two structural weft wires of the lower fabric layer are first looped through. Then the warp wires of the lower fabric layer loop through. In this way, the binding weft wires can hold together the remnants of the warp wires of the lower fabric layer, that is, even if the running side of the paper machine screen has already been ground through.

Claims (3)

1. Bespannung für Papiermaschinen aus einem Gewebe mit zwei oder mehr Gewebelagen aus miteinander verwobenen strukturellen Längs- und Querfäden, wobei die Gewebelagen durch zusätzliche Binde-Querfäden miteinander verbunden sind, dadurch gekennzeichnet, daß zumindest die strukturellen Querfäden (2) der untersten Gewebelage, die gemeinsam mit den Binde-Querfäden (3) abbinden, doppelt ausgeführt sind, wodurch die Binde-Querfäden (3) in der untersten Gewebelage zwischen den doppelt ausgeführten strukturellen Querfäden (2) und dem an der betreffenden Stelle abgebundenen strukturellen Längsfaden (1) eingeschlossen werden.1. covering for paper machines from a fabric with two or more fabric layers of interwoven structural longitudinal and transverse threads, the fabric layers being connected to one another by additional binding transverse threads, characterized in that at least the structural transverse threads (2) of the lowermost fabric layer, the tie together with the binding cross threads (3), are double, whereby the binding cross threads (3) are enclosed in the lowest fabric layer between the double-running structural cross threads (2) and the structural longitudinal thread (1) tied at the relevant point . 2. Bespannung nach Anspruch 1, dadurch gekennzeichnet , daß die Binde-Querfäden (3) dünner sind als die strukturellen Querfäden (2) der untersten Gewebelage.2. Covering according to claim 1, characterized in that the binding transverse threads (3) are thinner than the structural transverse threads (2) of the lowest fabric layer. 3. Bespannung nach Anspruch 1 oder 2, dadurch gekennzeichnet , daß auch in der oberen Gewebelage zumindest ein Teil der strukturellen Querfäden doppelt ausgeführt ist und an den Abbindestellen jeweils ein Querfaden eines Querfadenpaares als Binde-Querfaden mit einem Längsfaden der unteren Gewebelage abbindet.3. covering according to claim 1 or 2, characterized in that in the upper fabric layer at least a part of the structural transverse threads is double and a cross thread of a pair of cross threads as binding cross thread with a longitudinal thread of the lower fabric layer at the binding points.
EP84109662A 1983-08-17 1984-08-14 Multilayer cloth for a paper-making machine Expired EP0144529B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84109662T ATE31562T1 (en) 1983-08-17 1984-08-14 MULTI-LAYER CLOTHING FOR PAPER MACHINES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3329739A DE3329739C1 (en) 1983-08-17 1983-08-17 Multi-layer covering for paper machines
DE3329739 1983-08-17

Publications (3)

Publication Number Publication Date
EP0144529A2 true EP0144529A2 (en) 1985-06-19
EP0144529A3 EP0144529A3 (en) 1985-07-03
EP0144529B1 EP0144529B1 (en) 1987-12-23

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EP84109662A Expired EP0144529B1 (en) 1983-08-17 1984-08-14 Multilayer cloth for a paper-making machine

Country Status (6)

Country Link
US (1) US4592396A (en)
EP (1) EP0144529B1 (en)
AT (1) ATE31562T1 (en)
DE (2) DE3329739C1 (en)
FI (1) FI80091C (en)
NO (1) NO155975C (en)

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EP0889160A1 (en) * 1997-07-02 1999-01-07 Andreas Kufferath GmbH & Co. KG Screencloth for papermaking machine

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Also Published As

Publication number Publication date
EP0144529B1 (en) 1987-12-23
ATE31562T1 (en) 1988-01-15
EP0144529A3 (en) 1985-07-03
NO155975B (en) 1987-03-23
FI80091B (en) 1989-12-29
FI843225A0 (en) 1984-08-15
NO843271L (en) 1985-02-18
DE3329739C1 (en) 1985-01-10
FI80091C (en) 1992-11-10
FI843225A (en) 1985-02-18
NO155975C (en) 1987-07-01
US4592396A (en) 1986-06-03
DE3468244D1 (en) 1988-02-04

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