EP1798335A1 - Papermaking fabric - Google Patents

Papermaking fabric Download PDF

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Publication number
EP1798335A1
EP1798335A1 EP06122507A EP06122507A EP1798335A1 EP 1798335 A1 EP1798335 A1 EP 1798335A1 EP 06122507 A EP06122507 A EP 06122507A EP 06122507 A EP06122507 A EP 06122507A EP 1798335 A1 EP1798335 A1 EP 1798335A1
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EP
European Patent Office
Prior art keywords
threads
thread
longitudinal
binding
transverse
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Granted
Application number
EP06122507A
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German (de)
French (fr)
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EP1798335B1 (en
Inventor
Petra Hack-Ueberall
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Voith Patent GmbH
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Voith Patent GmbH
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Publication of EP1798335A1 publication Critical patent/EP1798335A1/en
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    • 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

Definitions

  • the invention relates to a papermaking wire according to the preamble of patent claim 1.
  • Paper machine screens are subject to a great variety of requirements.
  • the paper-facing paper side of the screen in particular for the production of graphic papers, must have a finely structured surface with as few marking points as possible, which are often formed by so-called binding diagonals.
  • the running side of the clothing must have a coarse structure with a high wear volume in order to achieve the best possible service life in order to protect the machine-directional and force-absorbing yarns.
  • coverings have been developed with a paper-side fabric and with a running-side fabric connected to it by means of binding threads.
  • a forming fabric which has a paper-side fabric formed in plain weave and in which two crossing points of the binding threads are formed in each running side repeat in the warp direction when changing between their weaves with the paper side and the running side fabric.
  • the warp bumps are arranged on diagonals running parallel to one another, which results in an increased marking of the paper formed on such a fabric.
  • a paper machine wire in particular a forming fabric, having an upper fabric layer repeating itself in upper rapports, the outer side of which forms the paper side of the wire
  • the screen further comprises a lower fabric layer, the outside of which forms the machine side of the screen and arranged in groups in the longitudinal thread direction extending binding threads which connect the upper and lower fabric layers together.
  • the upper fabric layer is formed at least by the binding threads and the upper transverse threads extending transversely to the binding threads, in that the binding threads of each group alternate intermittently during weaving with the upper transverse threads in the longitudinal thread direction and jointly form an upper longitudinal thread course Repeats along the length of the upper repeat in the longitudinal direction.
  • the lower fabric layer of the paper machine clothing according to the invention is formed at least by the binding threads and these interwoven transverse transverse threads extending transversely to the binding threads, whereby the binding threads of each group undergo interweaving with the upper transverse threads for interweaving with the lower transverse threads and vice versa Crossing training of intersections.
  • the papermaking fabric according to the invention is characterized in that the binding threads of at least one group are interwoven with the upper and lower transverse threads such that at least two successive crossing points are arranged along the length of the upper repeat in the longitudinal thread direction.
  • a high binding frequency is created between the upper or paper side and the lower or running side fabric, whereby a stable connection between the paper side and the running side fabric is provided.
  • intersection points can be distributed more irregularly than is possible with the coverings known from the prior art, which in particular reduces the visibility of markings produced by different hydraulic dewatering pressure becomes.
  • the upper fabric layer is formed only by the weaving of the upper transverse threads with the binding threads.
  • the upper fabric layer is formed by the weaving of the grouped binding threads with the upper transverse threads and by the weaving of upper longitudinal threads with the upper transverse threads.
  • the upper longitudinal threads are woven only with the upper transverse threads, which is why everyone upper longitudinal thread when weaving with the upper transverse thread forms an upper longitudinal thread course.
  • the upper fabric layer is irregular. If the upper fabric layer is formed by interweaving the binding threads with the upper transverse threads, then each upper longitudinal thread course formed by a group of binding threads comprises longitudinal thread bumps and longitudinal thread bumps. In this case, a longitudinal thread lift is formed by the binding yarn of a group weaving in each case above the upper transverse threads crossing an upper transverse thread continuously on the outside of the upper fabric layer. A longitudinal thread reduction is formed in this case by the respective upper transverse threads weaving binder thread of a group between upper and lower fabric layer continuously crosses an upper transverse thread.
  • the upper fabric layer is additionally formed by the interweaving of upper longitudinal threads with the upper transverse threads, then longitudinal thread elevations are formed by the upper longitudinal thread continuously crossing an upper transverse thread on the outside of the upper fabric layer. Furthermore, longitudinal thread decreases are formed by the upper longitudinal thread between the upper and lower fabric layers continuously crossing an upper transverse thread.
  • the upper fabric layer is formed irregularly by the arrangement of the Leksfadenhebungen and -derenkungen forms an irregular pattern in the upper rapport on the outside.
  • the irregular pattern of the upper fabric layer can be formed by at least two L Lucassfadenverstructure are formed in the upper repeat that one of the two Leksfadenverstructure not by displacement of all its longitudinal thread elevations and depressions by an equal number of upper transverse threads in the longitudinal direction of the can produce other of the two longitudinal thread courses.
  • the upper repeat comprises at least two longitudinal thread courses in which one of the two longitudinal thread courses can not be produced by offsetting all of its longitudinal thread elevations and dips by an equal number of upper transverse threads in the longitudinal thread direction from the other of the two longitudinal thread courses, the number of Binding diagonals and regular structures on the paper side reduced, resulting in a reduction of the marking of the paper machine screen produced with the paper.
  • the upper weave pattern has an irregular structure in that none of the upper longitudinal thread courses in the upper repeat by offset all its longitudinal thread elevations and longitudinal thread descents by a same Number of upper transverse threads in the longitudinal direction of the thread can be generated from another upper longitudinal thread course of the repeat.
  • bonds are called creping bonds.
  • the upper fabric layer preferably comprises upper transverse threads or upper transverse threads and binding threads which have a diameter in the range from 0.03 mm to 0.5 mm, preferably 0.08 mm to 0.15 mm.
  • the irregular pattern is formed by the upper repeat has a first upper longitudinal thread course, an immediately adjacent second longitudinal thread course and the second immediately adjacent third longitudinal thread course, which are formed such that the Offset of the longitudinal thread elevations and longitudinal thread descents of the second longitudinal thread course relative to the longitudinal thread elevations and depressions of the first longitudinal thread course is not equal to the offset of the longitudinal thread elevations and longitudinal thread elevations of the third longitudinal thread course relative to the longitudinal thread elevations and depressions of the second longitudinal thread course.
  • the irregular paper-side weave structure can also be provided by the fact that the upper weave structure comprises a number of mutually different longitudinal thread runs, wherein the number of mutually different longitudinal thread runs is less than the number of longitudinal thread runs forming the upper repeat.
  • the mutually different longitudinal thread paths are arranged in a non-repetitive order over the entire upper repeat.
  • the resulting longitudinal thread repeat can then be very large, for example, 12 longitudinal thread courses include, wherein the number of mutually different longitudinal thread paths, for example, is only four. This means that a very large binding can be woven with only a small number of shafts for the paper side.
  • the order of the longitudinal thread courses can, for example, be as follows: 1-2-3-1-4-1-2-3-4-2-3-1
  • the number of longitudinal thread bumps and longitudinal thread bumps in the upper repeat is substantially the same.
  • the paper side is dominated neither by longitudinal thread elevations nor by longitudinal thread reductions, so that a result in the plane paper page with irregular structure and resulting, with even further reduced marking tendency is created.
  • another particularly preferred embodiment of the invention provides that none of the longitudinal thread courses in the upper repeat by offset all its longitudinal thread elevations and depressions by an equal number of upper transverse threads in the longitudinal direction of a different thread Create longitudinal thread course. This means that each longitudinal thread course in the upper repeat in its L jossfadenhebungs- and lowering sequence is different from the other L jossfadenverĂȘtn.
  • the irregular structure of the upper fabric layer can be formed alone or in combination by: Free textile development, alteration of a textile basic weave, derivation of a textile basic weave, extension of a textile basic weave.
  • the reduction of the marking tendency can be further reduced if the paper-side repeat is large, i. is formed from at least 14 upper transverse threads.
  • the tendency to mark can be significantly reduced, since the spacing of regularly arranged longitudinal thread elevations increases as a result of the enlargement of the repeat.
  • a preferred embodiment of the invention provides that a maximum of three, preferably a maximum of two paper-side longitudinal thread elevations are arranged adjacent to each other immediately adjacent to each upper longitudinal thread and that a maximum of three, preferably a maximum of two paper-side Leksfadensenkept are arranged adjacent to each other directly.
  • a ratio of upper to lower transverse threads of greater than 1 it is particularly possible to provide a fabric that connects a fine, ie non-marking paper side and a coarse and wearable running side, since on the one hand the paper-side fabric by more transverse threads than is formed in a 1 to 1 ratio and on the other hand for the running side fabric running side transverse threads with a larger thread diameter can be used than in a 1 to 1 ratio.
  • each lower transverse thread is held by a plurality of binding threads by each of these binding threads on the outside of the lower fabric layer continuously crosses the respective lower transverse thread, wherein some of the respective lower transverse thread holding binding threads by at least one of the respective lower Transverse thread non-retaining binding threads are spaced from each other by the non-retaining binding thread not on the outside of the lower fabric layer continuously crosses the respective lower transverse thread, and wherein a plurality of lower transverse threads are provided, in each case between successive, the respective lower transverse thread holding binding threads an equal Number of non-retaining binding threads is arranged.
  • the holding force can furthermore be uniformly distributed, as a result of which a significantly stronger connection between the two fabric layers can be achieved, as a result of which their relative movement to one another can be reduced to a minimum, which leads to a minimization of the internal wear of the paper machine wire according to the invention ,
  • the uniform distribution of the binding sites and the possible stronger attachment of the upper to the lower fabric layer leads to a reduced total thickness of the paper machine fabric according to the invention in comparison to the screens known from the prior art.
  • an equal number of binding threads not holding the transverse thread are arranged for each lower transverse thread between successive binding threads respectively holding the lower transverse thread.
  • the number of binding threads not holding the respective transverse thread is between two and twenty, preferably between six and ten. Tests have shown that with the same float lengths of between two and twenty binding threads not holding the respective lower transverse thread a good connection between upper and lower fabric layer can be provided, coupled with improved wear resistance, in particular for use in paper machines at speeds of 1500 m / min or more.
  • the overall repeat is preferably formed by a multiplicity of longitudinal threads and / or upper and lower transverse threads.
  • the overall repeat of the papermaker's fabric may include, for example, 24 or more or 26 or more or 32 or more or 48 or more longitudinal thread courses and / or 24 or more or 26 or more or 32 or more or 48 or more top and bottom transverse threads.
  • the marking tendency of the paper side can be significantly reduced by the upper fabric layer having an upper repeat formed by 24 or more longitudinal thread courses and by 24 or more upper transverse threads.
  • the binding threads are warp threads and the transverse threads are weft threads.
  • the binding threads are weft threads and the transverse threads are warp threads. In the latter case, it is a shotgun system.
  • FIG. 1 shows the course of two binder threads B1a, B1b arranged next to one another and of a papermaker's fabric 100 according to the invention designed as a forming fabric.
  • the two binding threads B1a, B1b are warp yarns which alternate in sections with upper or paper-side transverse threads P1 through P16, which are weft threads, are interwoven.
  • the two binding threads B1a, B1b together form an upper or paper-side longitudinal thread course V1, which is repeated in paper-side longitudinal thread repeat A.
  • the paper-side longitudinal thread repeat A is therefore formed from 16 upper transverse threads.
  • the two binding threads B1a, B1b are interwoven in sections alternately with lower or running transverse threads L1 to L8, which are also weft threads, and form a running-side longitudinal thread course 10 during weaving with the running side transverse threads L1 to L8, resulting in running longitudinal thread patterns B repeated.
  • the lower or continuous longitudinal thread repeat B is therefore formed from eight running side transverse threads.
  • the ratio of paper-side transverse threads P1 to P16 to running-side transverse threads L1 to L8 is 2: 1.
  • the binding threads B1a, B1b of the group intersect to form intersections 103 and 104.
  • the two binding threads B1a, B1b forming a group are interwoven with the paper-side transverse threads P1 through P16 and with the running-side transverse threads L1 through L8, that at least two successively arranged intersection points 103 and 104 are arranged within a paper-side longitudinal thread repeat A.
  • binding threads B1a, B1b are interwoven with the paper-side P1 to P16 and running-side L1 to L8 transverse threads in such a way that two consecutively arranged crossing points 103 and 104 are arranged within each longitudinal thread repeat B on the side.
  • the paper-side fabric 101 is formed by weaving the paper-side transverse threads P1 to P16 with the binding threads (this becomes apparent later from FIGS. 2 and 3). Furthermore, the running side fabric 102 is formed by weaving the running side transverse threads L1 to L8 with the binding threads (this becomes apparent from FIG. 3).
  • FIG. 2 shows a schematic representation of paper-side longitudinal thread elevations (dark squares) and paper-side longitudinal thread depressions (light squares) in plan view of the paper-side fabric 101 from FIG. 1, which are formed during weaving of the binding threads grouped as pairs with the paper-side transverse threads P1 to P16 ,
  • the two binding threads B1a, B1b weave along the longitudinal yarn path V1 over the paper-side transverse threads P2, P3, P5, P8, P10, P12, P13 and P15 to form paper-side longitudinal thread bumps and under the paper-side transverse threads P1, P4, P6, P7 , P9, P11, P14 and P16 to form paper-side longitudinal thread depressions (see also Fig. 1).
  • the paper-side fabric 101 is formed by the repetition of paper-side rapport 105 formed respectively by longitudinal yarn courses V1 to V8 in weaving above and below the paper-side transverse threads P1 to P16.
  • FIG. 2 thus represents four juxtaposed paper-side rapports 105.
  • an irregular pattern should be understood in this context to mean a pattern in which not all the longitudinal thread bumps in the repeat 105 can be developed from one of the longitudinal thread courses by a single law.
  • An example of such an irregular pattern is, for example, a pattern in which at least two longitudinal thread courses are formed such that one of the two longitudinal thread courses does not result from an offset of all its longitudinal thread elevations and elevations by an equal number of upper transverse threads in the longitudinal thread direction from the other of the two Create longitudinal thread courses.
  • the irregular pattern in the repeat 105 is formed in that none of the longitudinal thread courses V1 to V8 can be produced by displacing all of its binder thread elevations and counters by an equal number of upper transverse threads P1 to P16 in the longitudinal thread direction from another longitudinal thread course ,
  • the longitudinal thread progression V1 can not be produced from any of the longitudinal thread progressions V2 to V8 by displacing all of its longitudinal thread elevations and countersinks by an equal number of upper transverse threads P1 to P16 in the longitudinal thread direction.
  • each paper-side longitudinal thread course V1 to V8 in the paper-side repeat 105 is formed by a maximum of two paper-side longitudinal thread bumps arranged directly adjacent to one another and by a maximum of two paper-side longitudinal thread bumps arranged directly adjacent to one another.
  • FIG. 3 shows the weaving paths of all binding threads B1a, B1b, B2a, B2b .... to B8a, B8b of the repeat of the papermachine clothing 101 according to the invention from Fig. 1.
  • each form the longitudinal thread pairs B1a, B1b and B2a, B2b and B3a, B3b to B8a, B8b together when weaving with the paper-side transverse threads P1 to P16 the paper-side longitudinal thread paths 1 and 2 known from FIG 2 and 3 to 8.

Abstract

Paper machine wire comprises an upper (paper-side) fabric layer and a lower (machine-side) fabric layer joined together with groups of longitudinal connecting threads. The upper layer comprises transverse threads interwoven with connecting threads in a repeat pattern; the lower layer comprises transverse threads interwoven with connecting threads; the groups of connecting threads alternate between the upper and lower layers to form crossing points; and there are at least two crossing points for each upper layer repeat.

Description

Die Erfindung betrifft Papiermaschinensieb nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a papermaking wire according to the preamble of patent claim 1.

An Papiermaschinensiebe werden unterschiedlichste Anforderungen gestellt. So muss die zum Papier gerichtete Papierseite des Siebs, insbesondere fĂŒr die Herstellung von graphischen Papieren, eine fein strukturierte OberflĂ€che mit möglichst wenig Markierungsstellen haben, welche oftmals durch sog. Bindungsdiagonalen gebildet werden. Die Laufseite der Bespannung muss hingegen zur Erzielung einer möglichst hohen Lebensdauer eine grobe Struktur mit hohem Verschleißvolumen haben, um die in Maschinenrichtung gerichteten und die Kraft aufnehmenden FĂ€den zu schĂŒtzen.Paper machine screens are subject to a great variety of requirements. Thus, the paper-facing paper side of the screen, in particular for the production of graphic papers, must have a finely structured surface with as few marking points as possible, which are often formed by so-called binding diagonals. By contrast, the running side of the clothing must have a coarse structure with a high wear volume in order to achieve the best possible service life in order to protect the machine-directional and force-absorbing yarns.

Um diese Anforderungen zu erfĂŒllen, wurden in der Vergangenheit Bespannungen mit einem papierseitigen Gewebe und mit einem mit diesem mittels BindefĂ€den verbundenen laufseitigen Gewebe entwickelt.In order to meet these requirements, in the past, coverings have been developed with a paper-side fabric and with a running-side fabric connected to it by means of binding threads.

Aus der EP 1 294 981 ist bspw. ein Formiersieb bekannt, welches ein in Leinwandbindung ausgebildetes papierseitiges Gewebe hat und bei dem in jedem Laufseitenrapport in Kettrichtung jeweils zwei Kreuzungsstellen der BindefÀden beim Wechsel zwischen deren Weben mit dem papierseitigen und dem laufseitigen Gewebe gebildet werden. Bei der Leinwandbindung sind die Ketthebungen auf zueinander parallele verlaufend angeordneten Diagonalen angeordnet, was eine erhöhte Markierung des auf einem solchen Gewebe gebildeten Papiers zu Folge hat.From the EP 1 294 981 For example, a forming fabric is known which has a paper-side fabric formed in plain weave and in which two crossing points of the binding threads are formed in each running side repeat in the warp direction when changing between their weaves with the paper side and the running side fabric. In the plain weave, the warp bumps are arranged on diagonals running parallel to one another, which results in an increased marking of the paper formed on such a fabric.

Es ist die Aufgabe der vorliegenden Erfindung ein verbessertes Papiermaschinensieb mit reduzierter Markierungsneigung vorzuschlagen, bei der die papierseitige obere und die laufseitige untere Gewebelage stabil miteinander verbunden sind.It is the object of the present invention to propose an improved papermaking screen with a reduced marking tendency, in which the paper-side upper and the running-side lower fabric layers are stably connected to one another.

Die Aufgabe wird erfindungsgemĂ€ĂŸ gelöst durch ein Papiermaschinensieb, insbesondere ein Formiersieb, mit den Merkmalen des Patentanspruchs 1.The object is achieved by a paper machine wire, in particular a forming fabric, with the features of claim 1.

GemĂ€ĂŸ der Erfindung wird ein Papiermaschinensieb, insbesondere Formiersieb, mit einer oberen sich in oberen Rapporten wiederholenden Gewebelage vorgeschlagen, deren Außenseite die Papierseite des Siebs bildet. Das Sieb umfasst des weiteren eine untere Gewebelage, deren Außenseite die Maschinenseite des Siebs bildet und in Gruppen angeordneten sich in LĂ€ngsfadenrichtung erstreckenden BindefĂ€den, welche die obere und die untere Gewebelage miteinander verbinden. Beim erfindungsgemĂ€ĂŸen Papiermaschinensieb wird die obere Gewebelage zumindest durch die BindefĂ€den und mit diesen verwobenen sich quer zu den BindefĂ€den erstreckenden oberen QuerfĂ€den gebildet, indem sich die BindefĂ€den jeder Gruppe beim Verweben mit den oberen QuerfĂ€den in LĂ€ngsfadenrichtung abschnittweise abwechseln und hierbei gemeinsam einen oberen LĂ€ngsfadenverlauf ausbilden, der sich auf der LĂ€nge des oberen Rapports in LĂ€ngsfadenrichtung wiederholt. Des weiteren wird die untere Gewebelage der erfindungsgemĂ€ĂŸen Papiermaschinenbespannung zumindest durch die BindefĂ€den und mit diesen verwobenen sich quer zu den BindefĂ€den erstreckenden unteren QuerfĂ€den gebildet, wobei sich die BindefĂ€den jeder Gruppe beim Wechsel vom Verweben mit den oberen QuerfĂ€den zum Verweben mit den unteren QuerfĂ€den und umgekehrt unter Ausbildung von Kreuzungsstellen kreuzen.According to the invention, a paper machine wire, in particular a forming fabric, having an upper fabric layer repeating itself in upper rapports, the outer side of which forms the paper side of the wire, is proposed. The screen further comprises a lower fabric layer, the outside of which forms the machine side of the screen and arranged in groups in the longitudinal thread direction extending binding threads which connect the upper and lower fabric layers together. In the case of the papermaker's fabric according to the invention, the upper fabric layer is formed at least by the binding threads and the upper transverse threads extending transversely to the binding threads, in that the binding threads of each group alternate intermittently during weaving with the upper transverse threads in the longitudinal thread direction and jointly form an upper longitudinal thread course Repeats along the length of the upper repeat in the longitudinal direction. Furthermore, the lower fabric layer of the paper machine clothing according to the invention is formed at least by the binding threads and these interwoven transverse transverse threads extending transversely to the binding threads, whereby the binding threads of each group undergo interweaving with the upper transverse threads for interweaving with the lower transverse threads and vice versa Crossing training of intersections.

Das erfindungsgemĂ€ĂŸe Papiermaschinensieb ist dadurch gekennzeichnet, dass die BindefĂ€den zumindest einer Gruppe derart mit den oberen und unteren QuerfĂ€den verwoben sind, dass auf der LĂ€nge des oberen Rapports in LĂ€ngsfadenrichtung zumindest zwei aufeinander folgende Kreuzungsstellen angeordnet sind.The papermaking fabric according to the invention is characterized in that the binding threads of at least one group are interwoven with the upper and lower transverse threads such that at least two successive crossing points are arranged along the length of the upper repeat in the longitudinal thread direction.

Durch die Bereitstellung von zumindest zwei aufeinander folgend angeordneten Kreuzungsstellen pro oberem LĂ€ngsfadenrapport wird zum einen eine hohe Bindungsfrequenz zwischen dem oberen bzw. papierseitigen und dem unteren bzw. laufseitigen Gewebe geschaffen, wodurch eine stabile Verbindung zwischen dem papierseitigen und dem laufseitigen Gewebe bereitgestellt wird. Zum Anderen ist es durch die Bereitstellung von zumindest zwei aufeinander folgend angeordneten Kreuzungsstellen pro oberem LĂ€ngsfadenrapport aufgrund eines lĂ€ngeren, d.h. mit mehr oberen QuerfĂ€den gebildeten LĂ€ngsfadenrapports möglich, einen grĂ¶ĂŸeren oberen Rapport mit weniger regelmĂ€ĂŸig zueinander angeordneten LĂ€ngsfadenhebungen als bei einer Leinwandbindung zu schaffen, wodurch die Markierungsneigung bedeutend reduziert wird. Es ist sogar möglich, eine völlig unregelmĂ€ĂŸige Anordnung der LĂ€ngsfadenhebungen und -senkungen im oberen Rapport bereitzustellen, wodurch eine papierseitige Gewebestruktur mit nahezu keiner Markierungsneigung geschaffen werden kann, da hierdurch eine Papierseite geschaffen wird, deren Muster sich nur von papierseitigem Rapport zu papierseitigem Rapport und nicht bereits innerhalb eines einzigen papierseitigen Rapports wiederholt.By providing at least two consecutively arranged crossing points per upper longitudinal thread repeat, on the one hand, a high binding frequency is created between the upper or paper side and the lower or running side fabric, whereby a stable connection between the paper side and the running side fabric is provided. On the other hand, it is possible by providing at least two consecutively arranged crossing points per upper longitudinal thread repeat due to a longer, ie formed with more upper transverse threads longitudinal thread repeat to create a larger upper repeat with less regularly arranged longitudinal thread lifts than a plain weave, creating the tendency to mark is significantly reduced. It is even possible to provide a completely irregular arrangement of the longitudinal thread elevations and depressions in the upper rapport, whereby a paper-side fabric structure with almost no tendency to mark can be created, as a result, a paper page is created whose pattern is only from Papierseitigem repeat to Papierseitigem repeat and not already repeated within a single paper-side repeat.

Des weiteren können durch die Bereitstellung von zumindest zwei aufeinander folgend angeordneten Kreuzungsstellen pro papierseitigem bzw. oberem LĂ€ngsfadenrapport die Kreuzungsstellen unregelmĂ€ĂŸiger verteilt werden als dies bei den aus dem Stand der Technik bekannten Bespannungen möglich ist, wodurch insbesondere die Sichtbarkeit von durch unterschiedlichen hydraulischen EntwĂ€sserungsdruck entstehenden Markierungen verringert wird.Furthermore, by providing at least two consecutively arranged crossing points per paper-side or upper longitudinal thread repeat, the intersection points can be distributed more irregularly than is possible with the coverings known from the prior art, which in particular reduces the visibility of markings produced by different hydraulic dewatering pressure becomes.

Nach einer Ausgestaltung der Erfindung wird die obere Gewebelage nur durch das Weben der oberen QuerfĂ€den mit den BindefĂ€den gebildet. Ein Vorteil dieser Konfiguration besteht darin, dass ein Papiermaschinensieb geschaffen werden kann, das insbesondere fĂŒr Anwendungen, bei denen die Bespannung hohen Walkarbeiten ausgesetzt ist, eine bessere Verbindung zwischen der oberen und unteren Gewebelage gewĂ€hrleistet.According to one embodiment of the invention, the upper fabric layer is formed only by the weaving of the upper transverse threads with the binding threads. An advantage of this configuration is that a papermaking fabric can be created that provides a better bond between the upper and lower fabric layers, particularly for applications where the fabric is subjected to high flexing work.

SelbstverstÀndlich ist es auch möglich, dass die obere Gewebelage durch das Verweben der gruppierten BindefÀden mit den oberen QuerfÀden und durch das Verweben von oberen LÀngsfÀden mit den oberen QuerfÀden gebildet wird. Hierbei sind die oberen LÀngsfÀden nur mit den oberen QuerfÀden verwoben, weshalb jeder obere LÀngsfaden beim Verweben mit den oberen Querfaden einen oberen LÀngsfadenverlauf bildet.Of course, it is also possible that the upper fabric layer is formed by the weaving of the grouped binding threads with the upper transverse threads and by the weaving of upper longitudinal threads with the upper transverse threads. Here, the upper longitudinal threads are woven only with the upper transverse threads, which is why everyone upper longitudinal thread when weaving with the upper transverse thread forms an upper longitudinal thread course.

Nach einer bevorzugten Weiterbildung der Erfindung ist die obere Gewebelage unregelmĂ€ĂŸig. Wird die obere Gewebelage durch das Verweben der BindefĂ€den mit den oberen QuerfĂ€den gebildet, so umfasst jeder durch eine Gruppe von BindefĂ€den gebildete obere LĂ€ngsfadenverlauf LĂ€ngsfadenhebungen und LĂ€ngsfadensenkungen. Eine LĂ€ngsfadenhebung wird hierbei gebildet, indem der jeweils obere QuerfĂ€den webende Bindefaden einer Gruppe auf der Außenseite der oberen Gewebelage laufend einen oberen Querfaden kreuzt. Eine LĂ€ngsfadensenkung wird hierbei gebildet, indem der jeweils obere QuerfĂ€den webende Bindefaden einer Gruppe zwischen oberer und unterer Gewebelage laufend einen oberen Querfaden kreuzt.According to a preferred embodiment of the invention, the upper fabric layer is irregular. If the upper fabric layer is formed by interweaving the binding threads with the upper transverse threads, then each upper longitudinal thread course formed by a group of binding threads comprises longitudinal thread bumps and longitudinal thread bumps. In this case, a longitudinal thread lift is formed by the binding yarn of a group weaving in each case above the upper transverse threads crossing an upper transverse thread continuously on the outside of the upper fabric layer. A longitudinal thread reduction is formed in this case by the respective upper transverse threads weaving binder thread of a group between upper and lower fabric layer continuously crosses an upper transverse thread.

Wird die obere Gewebelage zusĂ€tzlich durch das Verweben von oberen LĂ€ngsfĂ€den mit den oberen QuerfĂ€den gebildet, so werden hierdurch LĂ€ngsfadenhebungen gebildet indem der obere LĂ€ngsfaden auf der Außenseite der oberen Gewebelage laufend einen oberen Querfaden kreuzt. Des weiteren werden LĂ€ngsfadensenkungen gebildet indem der obere LĂ€ngsfaden zwischen oberer und unterer Gewebelage laufend einen oberen Querfaden kreuzt.If the upper fabric layer is additionally formed by the interweaving of upper longitudinal threads with the upper transverse threads, then longitudinal thread elevations are formed by the upper longitudinal thread continuously crossing an upper transverse thread on the outside of the upper fabric layer. Furthermore, longitudinal thread decreases are formed by the upper longitudinal thread between the upper and lower fabric layers continuously crossing an upper transverse thread.

Die obere Gewebelage ist hierbei unregelmĂ€ĂŸig ausgebildet, indem im oberen Rapport die Anordnung der LĂ€ngsfadenhebungen und -senkungen auf der Außenseite ein unregelmĂ€ĂŸiges Muster bildet.The upper fabric layer is formed irregularly by the arrangement of the LĂ€ngsfadenhebungen and -derenkungen forms an irregular pattern in the upper rapport on the outside.

Konkret kann das unregelmĂ€ĂŸige Muster der oberen Gewebelage dadurch gebildet werden, indem im oberen Rapport zumindest zwei LĂ€ngsfadenverlĂ€ufe derart ausgebildet sind, dass sich der eine der beiden LĂ€ngsfadenverlĂ€ufe nicht durch Versatz aller seiner LĂ€ngsfadenhebungen und -senkungen um eine gleiche Anzahl von oberen QuerfĂ€den in LĂ€ngsfadenrichtung aus dem anderen der beiden LĂ€ngsfadenverlĂ€ufe erzeugen lĂ€sst.Specifically, the irregular pattern of the upper fabric layer can be formed by at least two LĂ€ngsfadenverlĂ€ufe are formed in the upper repeat that one of the two LĂ€ngsfadenverlĂ€ufe not by displacement of all its longitudinal thread elevations and depressions by an equal number of upper transverse threads in the longitudinal direction of the can produce other of the two longitudinal thread courses.

Dadurch, dass der obere Rapport zumindest zwei LĂ€ngsfadenverlĂ€ufe umfasst, bei denen sich der eine der beiden LĂ€ngsfadenverlĂ€ufe nicht durch Versatz aller seiner LĂ€ngsfadenhebungen und -senkungen um eine gleiche Anzahl von oberen QuerfĂ€den in LĂ€ngsfadenrichtung aus dem anderen der beiden LĂ€ngsfadenverlĂ€ufe erzeugen lĂ€sst, wird die Anzahl von Bindungsdiagonalen und regelmĂ€ĂŸigen Strukturen auf der Papierseite reduziert, was zu einer Reduzierung der Markierung des mit dem Papiermaschinensieb hergestellten Papiers fĂŒhrt.Due to the fact that the upper repeat comprises at least two longitudinal thread courses in which one of the two longitudinal thread courses can not be produced by offsetting all of its longitudinal thread elevations and dips by an equal number of upper transverse threads in the longitudinal thread direction from the other of the two longitudinal thread courses, the number of Binding diagonals and regular structures on the paper side reduced, resulting in a reduction of the marking of the paper machine screen produced with the paper.

Um eine nahezu völlig unregelmĂ€ĂŸige Papierseite des erfindungsgemĂ€ĂŸen Siebs zu erhalten, sieht eine weitere besonders bevorzugte Weiterbildung der Erfindung vor, dass das obere Webmuster eine unregelmĂ€ĂŸige Struktur aufweist, indem sich keiner der oberen LĂ€ngsfadenverlĂ€ufe im oberen Rapport durch Versatz aller seiner LĂ€ngsfadenhebungen und LĂ€ngsfadensenkungen um eine gleiche Anzahl von oberen QuerfĂ€den in LĂ€ngsfadenrichtung aus einem anderen oberen LĂ€ngsfadenverlauf des Rapports erzeugen lĂ€sst. Solche Bindungen werden als Kreppbindungen bezeichnet.In order to obtain a virtually completely irregular paper side of the sieve according to the invention, another particularly preferred development of the invention provides that the upper weave pattern has an irregular structure in that none of the upper longitudinal thread courses in the upper repeat by offset all its longitudinal thread elevations and longitudinal thread descents by a same Number of upper transverse threads in the longitudinal direction of the thread can be generated from another upper longitudinal thread course of the repeat. Such bonds are called creping bonds.

Vorzugsweise umfasst die obere Gewebelage hierbei obere QuerfÀden oder obere QuerfÀden und BindefÀden, die einen Durchmesser im Bereich von 0,03mm bis 0,5mm, bevorzugt 0,08mm bis 0,15mm, haben. Hierdurch kann eine besonders feine und markierungsfreie Papierseite geschaffen werden.In this case, the upper fabric layer preferably comprises upper transverse threads or upper transverse threads and binding threads which have a diameter in the range from 0.03 mm to 0.5 mm, preferably 0.08 mm to 0.15 mm. As a result, a particularly fine and mark-free paper page can be created.

Nach einer weiteren zusĂ€tzlichen Ausgestaltung der Erfindung kann vorgesehen sein, dass das unregelmĂ€ĂŸige Muster gebildet wird, indem der obere Rapport einen ersten oberen LĂ€ngsfadenverlauf, einen dazu unmittelbar benachbarten zweiten LĂ€ngsfadenverlauf und einen zum zweiten unmittelbar benachbarten dritten LĂ€ngsfadenverlauf aufweist, die derart ausgebildet sind, dass der Versatz der LĂ€ngsfadenhebungen und LĂ€ngsfadensenkungen des zweiten LĂ€ngsfadenverlaufs relativ zu den LĂ€ngsfadenhebungen und -senkungen des ersten LĂ€ngsfadenverlaufs ungleich dem Versatz der LĂ€ngsfadenhebungen und LĂ€ngsfadensenkungen des dritten LĂ€ngsfadenverlaufs relativ zu den LĂ€ngsfadenhebungen und -senkungen des zweiten LĂ€ngsfadenverlaufs ist.According to a further additional embodiment of the invention can be provided that the irregular pattern is formed by the upper repeat has a first upper longitudinal thread course, an immediately adjacent second longitudinal thread course and the second immediately adjacent third longitudinal thread course, which are formed such that the Offset of the longitudinal thread elevations and longitudinal thread descents of the second longitudinal thread course relative to the longitudinal thread elevations and depressions of the first longitudinal thread course is not equal to the offset of the longitudinal thread elevations and longitudinal thread elevations of the third longitudinal thread course relative to the longitudinal thread elevations and depressions of the second longitudinal thread course.

Nach einer weiteren bevorzugten AusfĂŒhrungsform der Erfindung kann die unregelmĂ€ĂŸige papierseitige Webstruktur auch dadurch bereitgestellt werden, dass die obere Webstruktur eine Anzahl von zueinander unterschiedlichen LĂ€ngsfadenverlĂ€ufen umfasst, wobei die Anzahl der zueinander unterschiedlichen LĂ€ngsfadenverlĂ€ufe geringer ist als die Anzahl der den oberen Rapport bildenden LĂ€ngsfadenverlĂ€ufe.According to a further preferred embodiment of the invention, the irregular paper-side weave structure can also be provided by the fact that the upper weave structure comprises a number of mutually different longitudinal thread runs, wherein the number of mutually different longitudinal thread runs is less than the number of longitudinal thread runs forming the upper repeat.

Bei dieser AusfĂŒhrungsform sind die zueinander unterschiedlichen LĂ€ngsfadenverlĂ€ufe in einer sich nicht wiederholenden Reihenfolge ĂŒber den ganzen oberen Rapport angeordnet. Der dadurch entstehende LĂ€ngsfadenrapport kann dann sehr groß sein, bspw. 12 LĂ€ngsfadenverlĂ€ufe umfassen, wobei die Anzahl der zueinander unterschiedlichen LĂ€ngsfadenverlĂ€ufe bspw. nur vier betrĂ€gt. Dies bedeutet, dass eine sehr großrapportige Bindung kann mit nur einer geringen Anzahl an SchĂ€ften fĂŒr die Papierseite gewoben werden kann. Die Reihenfolge der LĂ€ngsfadenverlĂ€ufe kann bspw. wie folgt sein:
1-2-3-1-4-1-2-3-4-2-3-1In this embodiment, the mutually different longitudinal thread paths are arranged in a non-repetitive order over the entire upper repeat. The resulting longitudinal thread repeat can then be very large, for example, 12 longitudinal thread courses include, wherein the number of mutually different longitudinal thread paths, for example, is only four. This means that a very large binding can be woven with only a small number of shafts for the paper side. The order of the longitudinal thread courses can, for example, be as follows:
1-2-3-1-4-1-2-3-4-2-3-1

Auch eine solche Bindung wird als Kreppbindung bezeichnet.Also, such a bond is referred to as Kreppbindung.

Vorzugsweise ist die Anzahl von LĂ€ngsfadenhebungen und LĂ€ngsfadensenkungen im oberen Rapport im wesentlichen gleich. Hierdurch wird die Papierseite, weder durch LĂ€ngsfadenhebungen noch durch LĂ€ngsfadensenkungen dominiert, sodass eine im Ergebnis plane Papierseite mit unregelmĂ€ĂŸiger Struktur und daraus resultierend, mit noch weiter reduzierter Markierungsneigung geschaffen wird.Preferably, the number of longitudinal thread bumps and longitudinal thread bumps in the upper repeat is substantially the same. As a result, the paper side is dominated neither by longitudinal thread elevations nor by longitudinal thread reductions, so that a result in the plane paper page with irregular structure and resulting, with even further reduced marking tendency is created.

Um eine nahezu völlig unregelmĂ€ĂŸige Papierseite des erfindungsgemĂ€ĂŸen Siebs zu erhalten, sieht eine weitere besonders bevorzugte Weiterbildung der Erfindung vor, dass sich keiner der LĂ€ngsfadenverlĂ€ufe im oberen Rapport durch Versatz aller seiner LĂ€ngsfadenhebungen und -senkungen um eine gleiche Anzahl von oberen QuerfĂ€den in LĂ€ngsfadenrichtung aus einem anderen LĂ€ngsfadenverlauf erzeugen lĂ€sst. Dies bedeutet, dass jeder LĂ€ngsfadenverlauf im oberen Rapport in seiner LĂ€ngsfadenhebungs- und senkungssequenz unterschiedlich zu den anderen LĂ€ngsfadenverlĂ€ufen ist.In order to obtain a nearly completely irregular paper side of the sieve according to the invention, another particularly preferred embodiment of the invention provides that none of the longitudinal thread courses in the upper repeat by offset all its longitudinal thread elevations and depressions by an equal number of upper transverse threads in the longitudinal direction of a different thread Create longitudinal thread course. This means that each longitudinal thread course in the upper repeat in its LĂ€ngsfadenhebungs- and lowering sequence is different from the other LĂ€ngsfadenverlĂ€ufen.

Bindungstechnisch kann die unregelmĂ€ĂŸige Struktur der oberen Gewebelage allein oder in Kombination gebildet werden durch:
freie textile Entwicklung, VerÀnderung einer textilen Grundbindung, Ableitung einer textilen Grundbindung, Erweiterung einer textilen Grundbindung.Binding technically, the irregular structure of the upper fabric layer can be formed alone or in combination by:
Free textile development, alteration of a textile basic weave, derivation of a textile basic weave, extension of a textile basic weave.

Die Reduzierung der Markierungsneigung kann weiter reduziert werden, wenn der papierseitige Rapport groß ist, d.h. aus zumindest 14 oberen QuerfĂ€den gebildet wird. Durch die VergrĂ¶ĂŸerung des papierseitigen Rapports kann bspw. bei unregelmĂ€ĂŸiger Anordnung der LĂ€ngsfadenhebungen im papierseitigen Rapport die Markierungsneigung deutlich reduziert werden, da sich der Abstand regelmĂ€ĂŸig zueinander angeordneter LĂ€ngsfadenhebungen durch die VergrĂ¶ĂŸerung des Rapports vergrĂ¶ĂŸert.The reduction of the marking tendency can be further reduced if the paper-side repeat is large, i. is formed from at least 14 upper transverse threads. By increasing the paper-side repeat, for example, in the case of irregular arrangement of the longitudinal thread elevations in the paper-side repeat, the tendency to mark can be significantly reduced, since the spacing of regularly arranged longitudinal thread elevations increases as a result of the enlargement of the repeat.

Zur Schaffung einer fein strukturierten Papierseite ist es vorteilhaft, wenn die o.g. oberen LĂ€ngsfadensenkungen und LĂ€ngsfadenerhebungen relativ kurze Flottierungen haben. Deshalb sieht eine bevorzugte AusfĂŒhrungsform der Erfindung vor, dass bei jedem oberen LĂ€ngsfadenverlauf maximal drei, vorzugsweise maximal zwei papierseitige LĂ€ngsfadenhebungen unmittelbar zueinander benachbart angeordnet sind und dass maximal drei, vorzugsweise maximal zwei papierseitige LĂ€ngsfadensenkungen unmittelbar zueinander benachbart angeordnet sind.To create a finely structured paper page, it is advantageous if the o.g. upper LĂ€ngsfadensenkungen and longitudinal thread surveys have relatively short floats. Therefore, a preferred embodiment of the invention provides that a maximum of three, preferably a maximum of two paper-side longitudinal thread elevations are arranged adjacent to each other immediately adjacent to each upper longitudinal thread and that a maximum of three, preferably a maximum of two paper-side LĂ€ngsfadensenkungen are arranged adjacent to each other directly.

Nach einer bevorzugten Weiterentwicklung der Erfindung ist das VerhĂ€ltnis von oberen zu unteren QuerfĂ€den grĂ¶ĂŸer als 1, insbesondere 2:1 oder 3:2. Durch die Bereitstellung eines VerhĂ€ltnis von oberen zu unteren QuerfĂ€den von grĂ¶ĂŸer als 1 ist es insbesondere möglich eine Bespannung zu schaffen, die eine feine, d.h. nicht markierende Papierseite und eine grobe und verschleißfĂ€hige Laufseite miteinander verbindet, da zum einen das papierseitige Gewebe durch mehr QuerfĂ€den als bei einem 1 zu 1 VerhĂ€ltnis gebildet wird und zum anderen fĂŒr das laufseitige Gewebe laufseitige QuerfĂ€den mit grĂ¶ĂŸerem Fadendurchmesser als bei einem 1 zu 1 VerhĂ€ltnis verwendet werden können.According to a preferred development of the invention, the ratio of upper to lower transverse threads greater than 1, in particular 2: 1 or 3: 2. By providing a ratio of upper to lower transverse threads of greater than 1, it is particularly possible to provide a fabric that connects a fine, ie non-marking paper side and a coarse and wearable running side, since on the one hand the paper-side fabric by more transverse threads than is formed in a 1 to 1 ratio and on the other hand for the running side fabric running side transverse threads with a larger thread diameter can be used than in a 1 to 1 ratio.

Eine Weiterbildung der Erfindung sieht vor, dass jeder untere Querfaden durch jeweils mehrere BindefĂ€den gehalten wird, indem jeder dieser BindefĂ€den auf der Außenseite der unteren Gewebelage laufend den jeweiligen unteren Querfaden kreuzt, wobei manche der einen jeweiligen unteren Querfaden haltenden BindefĂ€den durch zumindest einen den jeweiligen unteren Querfaden nicht haltenden Bindefaden voneinander beabstandet sind, indem der nicht haltende Bindefaden nicht auf der Außenseite der unteren Gewebelage laufend den jeweiligen unteren Querfaden kreuzt, und wobei mehrere untere QuerfĂ€den vorgesehen sind, bei denen jeweils zwischen aufeinander folgenden, den jeweiligen unteren Querfaden haltenden BindefĂ€den eine gleiche Anzahl von nicht haltenden BindefĂ€den angeordnet ist.A development of the invention provides that each lower transverse thread is held by a plurality of binding threads by each of these binding threads on the outside of the lower fabric layer continuously crosses the respective lower transverse thread, wherein some of the respective lower transverse thread holding binding threads by at least one of the respective lower Transverse thread non-retaining binding threads are spaced from each other by the non-retaining binding thread not on the outside of the lower fabric layer continuously crosses the respective lower transverse thread, and wherein a plurality of lower transverse threads are provided, in each case between successive, the respective lower transverse thread holding binding threads an equal Number of non-retaining binding threads is arranged.

Dadurch dass bei mehreren der unteren QuerfĂ€den zwischen aufeinander folgenden, den unteren Querfaden jeweils haltenden BindefĂ€den immer eine gleiche Anzahl von nicht haltenden BindefĂ€den angeordnet sind, wird erreicht, dass jeder dieser QuerfĂ€den zwischen aufeinander folgenden Stellen an denen dieser von einem Bindefaden gehalten wird, sog. Bindestellen des oberen Gewebes an das untere Gewebe, immer gleiche FlottierungslĂ€ngen auf der Außenseite des unteren Gewebes, d.h. auf der Maschinenseite, des Papiermaschinensiebs hat.The fact that in several of the lower transverse threads between successive, the lower transverse thread each holding binding threads are always arranged an equal number of non-retaining binding threads, it is achieved that each of these transverse threads between successive points where this is held by a binder thread, so-called. Binding sites of the upper tissue to the lower tissue, always the same Fleet lengths on the outside of the lower tissue, ie on the machine side, the paper machine screen has.

Durch die gleichen FlottierungslĂ€ngen der QuerfĂ€dens zwischen den Bindestellen wird eine gleichmĂ€ĂŸig verteilte Anbindung der oberen an die untere Gewebelage bereitgestellt, weshalb ein Papiermaschinensieb mit einer bezĂŒglich dem Stand der Technik deutlich verbesserten PlanaritĂ€t der Maschinen- und Papierseite bereitgestellt wird.Due to the same floating lengths of the transverse threads between the binding points, a uniformly distributed connection of the upper to the lower fabric layer is provided, which is why a papermaking fabric with a relative to the prior art Technique significantly improved planarity of the machine and paper side is provided.

Durch die gleichmĂ€ĂŸige Verteilung der Bindestellen kann des weiteren die Haltekraft gleichmĂ€ĂŸig verteilt werden, weshalb eine deutlich festere Verbindung zwischen den beiden Gewebelagen erreicht werden kann, wodurch deren Relativbewegung zueinander auf ein Minimum reduziert werden kann, was zu einer Mininierung des Inneren Verschleißes des erfindungsgemĂ€ĂŸen Papiermaschinensiebs fĂŒhrt.Due to the uniform distribution of the binding sites, the holding force can furthermore be uniformly distributed, as a result of which a significantly stronger connection between the two fabric layers can be achieved, as a result of which their relative movement to one another can be reduced to a minimum, which leads to a minimization of the internal wear of the paper machine wire according to the invention ,

DarĂŒber hinaus fĂŒhrt die gleichmĂ€ĂŸige Verteilung der Bindestellen und die damit mögliche festere Anbindung der oberen an die untere Gewebelage zu einer reduzierten Gesamtdicke des erfindungsgemĂ€ĂŸen Papiermaschinensiebs im Vergleich zu den aus dem Stand der Technik bekannten Sieben.In addition, the uniform distribution of the binding sites and the possible stronger attachment of the upper to the lower fabric layer leads to a reduced total thickness of the paper machine fabric according to the invention in comparison to the screens known from the prior art.

Durch die gleichen FlottierungslĂ€ngen der QuerfĂ€den zwischen den Bindestellen wird des weiteren ein gleichmĂ€ĂŸig verteiltes Verschleißvolumen der sich auf der Außenseite des unteren Gewebes (Maschinenseite) erstreckenden unteren QuerfĂ€den geschaffen, welche die Last aufnehmenden BindefĂ€den schĂŒtzen.By the same FlottierungslĂ€ngen the transverse threads between the binding sites further a uniformly distributed wear volume is created on the outside of the lower fabric (machine side) extending lower transverse threads, which protect the load-absorbing binding threads.

Es ist somit denkbar, dass bei einem unteren Querfaden die Anzahl von nicht haltenden BindefĂ€den, die zwischen aufeinander folgenden haltenden BindefĂ€den angeordnet sind fĂŒnf betrĂ€gt und bei einem anderen untern Querfaden sieben.It is thus conceivable that, in a lower transverse thread, the number of non-retaining binding threads arranged between successive retaining binding threads is five, and for another lower transverse thread is seven.

Nach einer darauf aufbauenden bevorzugten Ausgestaltung der Erfindung ist vorgesehen, dass fĂŒr jeden unteren Querfaden zwischen aufeinander folgenden, den unteren Querfaden jeweils haltenden BindefĂ€den eine gleiche Anzahl von den Querfaden nicht haltenden BindefĂ€den angeordnet sind. Dadurch, dass sĂ€mtliche untere QuerfĂ€den jeweils fĂŒr sich und in Bezug zu den anderen unteren QuerfĂ€den immer eine gleiche FlottierungslĂ€nge aufweisen, wird die GleichmĂ€ĂŸigkeit der Bindestellen weiter erhöht, weshalb die oben beschriebenen positiven Effekte bei dieser AusfĂŒhrungsform verstĂ€rkt werden.According to a preferred embodiment of the invention based thereon, it is provided that an equal number of binding threads not holding the transverse thread are arranged for each lower transverse thread between successive binding threads respectively holding the lower transverse thread. The fact that all the lower transverse threads always have the same float length per se and with respect to the other lower transverse threads, the uniformity of the binding points is further increased, so that the above-described positive effects are enhanced in this embodiment.

Vorzugsweise betrĂ€gt die Anzahl der den jeweiligen Querfaden nicht haltenden BindefĂ€den zwischen zwei und zwanzig, bevorzugt zwischen sechs und zehn. Versuche haben ergeben, dass bei gleichen FlottierungslĂ€ngen von zwischen zwei und zwanzig den jeweiligen unteren Querfaden nicht haltende BindefĂ€den eine gute Anbindung zwischen oberer und unterer Gewebelage bereitgestellt werden kann gepaart mit einer verbesserten VerschleißbestĂ€ndigkeit, insbesondere fĂŒr den Einsatz in Papiermaschinen bei Geschwindigkeiten von 1500m/min oder mehr.Preferably, the number of binding threads not holding the respective transverse thread is between two and twenty, preferably between six and ten. Tests have shown that with the same float lengths of between two and twenty binding threads not holding the respective lower transverse thread a good connection between upper and lower fabric layer can be provided, coupled with improved wear resistance, in particular for use in paper machines at speeds of 1500 m / min or more.

Um die FlexibilitĂ€t bei der Ausgestaltung der oberen und unteren Gewebelage des erfindungsgemĂ€ĂŸen Papiermaschinensiebs zu erhöhen, wird der Gesamtrapport vorzugsweise durch eine Vielzahl von LĂ€ngsfĂ€den und / oder oberen und unteren QuerfĂ€den gebildet. Konkret kann der Gesamtrapport des Papiermaschinensiebs beispielsweise 24 oder mehr oder 26 oder mehr oder 32 oder mehr oder 48 oder mehr LĂ€ngsfadenverlĂ€ufe und / oder 24 oder mehr oder 26 oder mehr oder 32 oder mehr oder 48 oder mehr obere und untere QuerfĂ€den umfassen.In order to increase the flexibility in the configuration of the upper and lower fabric layers of the papermachine fabric according to the invention, the overall repeat is preferably formed by a multiplicity of longitudinal threads and / or upper and lower transverse threads. Specifically, the overall repeat of the papermaker's fabric may include, for example, 24 or more or 26 or more or 32 or more or 48 or more longitudinal thread courses and / or 24 or more or 26 or more or 32 or more or 48 or more top and bottom transverse threads.

So kann bspw. die Markierungsneigung der Papierseite dadurch deutlich reduziert werden, indem die obere Gewebelage einen oberen Rapport hat, der durch 24 oder mehr LÀngsfadenverlÀufe und durch 24 oder mehr obere QuerfÀden gebildet wird.Thus, for example, the marking tendency of the paper side can be significantly reduced by the upper fabric layer having an upper repeat formed by 24 or more longitudinal thread courses and by 24 or more upper transverse threads.

Nach einer konkreten Ausgestaltung der Erfindung sind die BindefÀden KettfÀden und die QuerfÀden SchussfÀden. In diesem Fall handelt es sich um ein kettgebundenes System. Es ist aber auch möglich, dass die BindefÀden SchussfÀden und die QuerfÀden KettfÀden sind. Im letzt genannten Fall handelt es sich um ein schussgebundenes System.According to a specific embodiment of the invention, the binding threads are warp threads and the transverse threads are weft threads. In this case, it is a chain-bound system. But it is also possible that the binding threads are weft threads and the transverse threads are warp threads. In the latter case, it is a shotgun system.

Die Erfindung soll im weiteren anhand der nachfolgenden schematischen Zeichnungen nÀher erlÀutert werden. Es zeigen:

Fig. 1
die Webpfade von zwei LĂ€ngsfĂ€den einer erfindungsgemĂ€ĂŸen Papiermaschinenbespannung, die eine Gruppe bilden,
Fig. 2
eine schematische Darstellung von papierseitigen LĂ€ngsfadenhebungen in Draufsicht auf die Papierseite aus Fig. 1,
Fig. 3
die Webpfade von sĂ€mtlichen LĂ€ngsfĂ€den eines Rapports der erfindungsgemĂ€ĂŸen Papiermaschinenbespannung aus Fig. 1.
The invention will be explained in more detail below with reference to the following schematic drawings. Show it:
Fig. 1
the weaving paths of two longitudinal threads of a papermachine fabric according to the invention, which form a group,
Fig. 2
a schematic representation of paper-side LĂ€ngsfadenhebungen in Top view of the paper side of Fig. 1,
Fig. 3
the weaving paths of all longitudinal threads of a repeat of the papermachine clothing according to the invention from FIG. 1.

Die Figur 1 zeigt den Verlauf von zwei nebeneinander angeordneten und eine Gruppe bildenden BindefĂ€den B1a, B1b eines erfindungsgemĂ€ĂŸen als Formiersieb ausgebildeten Papiermaschinensiebs 100. Bei den beiden BindefĂ€den B1a, B1b handelt es sich um KettfĂ€den, die abschnittweise abwechselnd mit oberen bzw. papierseitigen QuerfĂ€den P1 bis P16, die SchussfĂ€den sind, verwoben sind. Beim Verweben mit den papierseitigen QuerfĂ€den P1 bis P16 bilden die beiden BindefĂ€den B1 a, B1 b zusammen einen oberen bzw. papierseitige LĂ€ngsfadenverlauf V1, der sich in papierseitigen LĂ€ngsfadenrapporten A wiederholt. Der papierseitige LĂ€ngsfadenrapport A wird demzufolge aus 16 oberen QuerfĂ€den gebildet. Des weiteren sind die beiden BindefĂ€den B1a, B1b abschnittweise abwechselnd mit unteren bzw. laufseitigen QuerfĂ€den L1 bis L8, die ebenfalls SchussfĂ€den sind, verwoben und bilden hierbei beim Verweben mit den laufseitigen QuerfĂ€den L1 bis L8 zusammen einen laufseitigen LĂ€ngsfadenverlauf 10, der sich in laufseitigen LĂ€ngsfadenrapporten B wiederholt. Der untere bzw. laufseitige LĂ€ngsfadenrapport B wird demzufolge aus acht laufseitigen QuerfĂ€den gebildet. Durch das Weben der beiden BindefĂ€den B1a, B1 b mit den papierseitigen QuerfĂ€den P1 bis P16 und mit den laufseitigen QuerfĂ€den L1 bis L8 wird zum einen das papierseitige Gewebe 101 mit dem laufseitigen Gewebe 102 verbunden und zum anderen das papierseitige Gewebe 101 und das laufseitige Gewebe 102 gebildet.FIG. 1 shows the course of two binder threads B1a, B1b arranged next to one another and of a papermaker's fabric 100 according to the invention designed as a forming fabric. The two binding threads B1a, B1b are warp yarns which alternate in sections with upper or paper-side transverse threads P1 through P16, which are weft threads, are interwoven. When weaving with the paper-side transverse threads P1 to P16, the two binding threads B1a, B1b together form an upper or paper-side longitudinal thread course V1, which is repeated in paper-side longitudinal thread repeat A. The paper-side longitudinal thread repeat A is therefore formed from 16 upper transverse threads. Furthermore, the two binding threads B1a, B1b are interwoven in sections alternately with lower or running transverse threads L1 to L8, which are also weft threads, and form a running-side longitudinal thread course 10 during weaving with the running side transverse threads L1 to L8, resulting in running longitudinal thread patterns B repeated. The lower or continuous longitudinal thread repeat B is therefore formed from eight running side transverse threads. By weaving the two binding threads B1a, B1b with the paper-side transverse threads P1 to P16 and with the running-side transverse threads L1 to L8, the paper-side fabric 101 is connected to the running-side fabric 102 on the one hand and the paper-side fabric 101 and the running-side fabric 102 on the other hand educated.

Wie aus der Fig. 1 zu erkennen ist, betrÀgt das VerhÀltnis von papierseitigen QuerfÀden P1 bis P16 zu laufseitigen QuerfÀden L1 bis L8 2:1.As can be seen from FIG. 1, the ratio of paper-side transverse threads P1 to P16 to running-side transverse threads L1 to L8 is 2: 1.

Beim Wechsel der BindefÀden B1a, B1b vom Weben mit den papierseitigen QuerfÀden P1 bis P16 zum Weben mit den laufseitigen QuerfÀden L1 bis L8 und umgekehrt kreuzen sich die BindefÀden B1a, B1b der Gruppe unter Bildung von Kreuzungsstellen 103 und 104.When changing the binding threads B1a, B1b from weaving with the paper-side transverse threads P1 to P16 for weaving with the running-side transverse threads L1 to L8 and vice versa, the binding threads B1a, B1b of the group intersect to form intersections 103 and 104.

ErfindungsgemĂ€ĂŸ sind die beiden eine Gruppe bildenden BindefĂ€den B1 a, B1 b derart mit den papierseitigen QuerfĂ€den P1 bis P16 und mit den laufseitigen QuerfĂ€den L1 bis L8 verwoben, dass innerhalb eines papierseitigen LĂ€ngsfadenrapports A zumindest zwei aufeinander folgend angeordnete Kreuzungsstellen 103 und 104 angeordnet sind.According to the invention, the two binding threads B1a, B1b forming a group are interwoven with the paper-side transverse threads P1 through P16 and with the running-side transverse threads L1 through L8, that at least two successively arranged intersection points 103 and 104 are arranged within a paper-side longitudinal thread repeat A.

Des weiteren sind die BindefÀden B1a, B1b derart mit den papierseitigen P1 bis P16 und laufseitigen L1 bis L8 QuerfÀden verwoben, dass innerhalb jedes laufseitigen LÀngsfadenrapports B zwei aufeinander folgend angeordnete Kreuzungsstellen 103 und 104 angeordnet sind.Furthermore, the binding threads B1a, B1b are interwoven with the paper-side P1 to P16 and running-side L1 to L8 transverse threads in such a way that two consecutively arranged crossing points 103 and 104 are arranged within each longitudinal thread repeat B on the side.

Bei der in Figur 1 dargestellten AusfĂŒhrungsform der erfindungsgemĂ€ĂŸen Papiermaschinenbespannung 100 wird das papierseitige Gewebe 101 durch das Weben der papierseitigen QuerfĂ€den P1 bis P16 mit den BindefĂ€den gebildet (dies wird spĂ€ter aus den Figuren 2 und 3 ersichtlich). Des weiteren wird das laufseitige Gewebe 102 durch das Weben der laufseitigen QuerfĂ€den L1 bis L8 mit den BindefĂ€den gebildet (dies wird aus der Figur 3 ersichtlich).In the embodiment of the paper machine clothing 100 according to the invention shown in FIG. 1, the paper-side fabric 101 is formed by weaving the paper-side transverse threads P1 to P16 with the binding threads (this becomes apparent later from FIGS. 2 and 3). Furthermore, the running side fabric 102 is formed by weaving the running side transverse threads L1 to L8 with the binding threads (this becomes apparent from FIG. 3).

Die Figur 2 zeigt eine schematische Darstellung von papierseitigen LĂ€ngsfadenhebungen (dunkle Quadrate) und papierseitigen LĂ€ngsfadensenkungen (helle Quadrate) bei Draufsicht auf das papierseitige Gewebe 101 aus Fig. 1, die beim Weben der als Paare gruppierten BindefĂ€den mit den papierseitigen QuerfĂ€den P1 bis P16 gebildet werden. So weben bspw. die beiden BindefĂ€den B1a, B1b entlang des LĂ€ngsfadenverlaufs V1 ĂŒber den papierseitigen QuerfĂ€den P2, P3, P5, P8, P10, P12, P13 und P15 unter Bildung von papierseitigen LĂ€ngsfadenhebungen und unter den papierseitigen QuerfĂ€den P1, P4, P6, P7, P9, P11, P14 und P16 unter Bildung von papierseitigen LĂ€ngsfadensenkungen (siehe auch Fig. 1).FIG. 2 shows a schematic representation of paper-side longitudinal thread elevations (dark squares) and paper-side longitudinal thread depressions (light squares) in plan view of the paper-side fabric 101 from FIG. 1, which are formed during weaving of the binding threads grouped as pairs with the paper-side transverse threads P1 to P16 , For example, the two binding threads B1a, B1b weave along the longitudinal yarn path V1 over the paper-side transverse threads P2, P3, P5, P8, P10, P12, P13 and P15 to form paper-side longitudinal thread bumps and under the paper-side transverse threads P1, P4, P6, P7 , P9, P11, P14 and P16 to form paper-side longitudinal thread depressions (see also Fig. 1).

Das papierseitige Gewebe 101 wird durch die Wiederholung von papierseitigen Rapporten 105 gebildet, die jeweils durch LĂ€ngsfadenverlĂ€ufe V1 bis V8 beim Weben ĂŒber und unter den papierseitigen QuerfĂ€den P1 bis P16 gebildet werden. Die Fig. 2 stellt somit vier nebeneinander angeordnete papierseitige Rapporte 105 dar.The paper-side fabric 101 is formed by the repetition of paper-side rapport 105 formed respectively by longitudinal yarn courses V1 to V8 in weaving above and below the paper-side transverse threads P1 to P16. FIG. 2 thus represents four juxtaposed paper-side rapports 105.

Wie aus der Fig. 2 zu erkennen ist, ist die Anordnung der papierseitigen LĂ€ngsfadenhebungen innerhalb des papierseitigen Rapports 105 derart, dass ein unregelmĂ€ĂŸiges Muster bildet wird. Unter einem unregelmĂ€ĂŸigen Muster soll in diesem Zusammenhang ein Muster verstanden werden, bei dem sich nicht alle LĂ€ngsfadenhebungen im Rapport 105 aus einem der LĂ€ngsfadenverlĂ€ufe durch eine einzige GesetzmĂ€ĂŸigkeit entwickeln lassen. Ein Beispiel eines solchen unregelmĂ€ĂŸigen Musters ist beispielsweise ein Muster, bei dem zumindest zwei LĂ€ngsfadenverlĂ€ufe derart ausgebildet sind, dass sich der eine der beiden LĂ€ngsfadenverlĂ€ufe nicht durch Versatz aller seiner LĂ€ngsfadenhebungen und - senkungen um eine gleiche Anzahl von oberen QuerfĂ€den in LĂ€ngsfadenrichtung aus dem anderen der beiden LĂ€ngsfadenverlĂ€ufe erzeugen lĂ€sst.As can be seen from Fig. 2, the arrangement of the paper-side longitudinal thread bumps within the paper-side repeat 105 is such that an irregular pattern is formed. An irregular pattern should be understood in this context to mean a pattern in which not all the longitudinal thread bumps in the repeat 105 can be developed from one of the longitudinal thread courses by a single law. An example of such an irregular pattern is, for example, a pattern in which at least two longitudinal thread courses are formed such that one of the two longitudinal thread courses does not result from an offset of all its longitudinal thread elevations and elevations by an equal number of upper transverse threads in the longitudinal thread direction from the other of the two Create longitudinal thread courses.

Im vorliegenden Beispiel der Figur 2 wird das unregelmĂ€ĂŸige Muster im Rapport 105 dadurch gebildet, indem sich keiner der LĂ€ngsfadenverlĂ€ufe V1 bis V8 durch Versatz aller seiner Bindefadenhebungen und -senkungen um eine gleiche Anzahl von oberen QuerfĂ€den P1 bis P16 in LĂ€ngsfadenrichtung aus einem anderen LĂ€ngsfadenverlauf erzeugen lĂ€sst. So lĂ€sst sich bspw. der LĂ€ngsfadenverlauf V1 aus keinem der LĂ€ngsfadenverlĂ€ufe V2 bis V8 durch Versatz aller seiner LĂ€ngsfadenhebungen und - senkungen um eine gleiche Anzahl von oberen QuerfĂ€den P1 bis P16 in LĂ€ngsfadenrichtung erzeugen.In the present example of FIG. 2, the irregular pattern in the repeat 105 is formed in that none of the longitudinal thread courses V1 to V8 can be produced by displacing all of its binder thread elevations and counters by an equal number of upper transverse threads P1 to P16 in the longitudinal thread direction from another longitudinal thread course , Thus, for example, the longitudinal thread progression V1 can not be produced from any of the longitudinal thread progressions V2 to V8 by displacing all of its longitudinal thread elevations and countersinks by an equal number of upper transverse threads P1 to P16 in the longitudinal thread direction.

Um einen möglichst feine Struktur des papierseitigen Gewebes 101 zu erhalten, wird jeder papierseitige LÀngsfadenverlauf V1 bis V8 im papierseitigen Rapport 105 durch maximal zwei papierseitige unmittelbar zueinander benachbart angeordnete LÀngsfadenhebungen und durch maximal zwei unmittelbar zueinander benachbart angeordnete papierseitige LÀngsfadensenkungen gebildet.In order to obtain the finest possible structure of the paper-side fabric 101, each paper-side longitudinal thread course V1 to V8 in the paper-side repeat 105 is formed by a maximum of two paper-side longitudinal thread bumps arranged directly adjacent to one another and by a maximum of two paper-side longitudinal thread bumps arranged directly adjacent to one another.

Die Fig. 3 zeigt die Webpfade von sĂ€mtlichen BindefĂ€den B1a, B1b, B2a, B2b ....bis B8a, B8b des Rapports der erfindungsgemĂ€ĂŸen Papiermaschinenbespannung 101 aus Fig. 1. Wie zu erkennen ist, bilden jeweils die LĂ€ngsfadenpaare B1a, B1b und B2a, B2b und B3a, B3b bis B8a, B8b zusammen beim Weben mit den papierseitigen QuerfĂ€den P1 bis P16 die aus der Fig. 2 bekannten papierseitigen LĂ€ngsfadenverlĂ€ufe 1 und 2 und 3 bis 8. Der Übersichtlichkeit halber sind keine laufseitigen LĂ€ngsfadenverlĂ€ufe bezeichnet, die beim Weben der LĂ€ngsfadenpaare B1a, B1b und B2a, B2b und B3a, B3b bis B8a, B8b mit den laufseitigen QuerfĂ€den L1 bis L8 gebildet werden.FIG. 3 shows the weaving paths of all binding threads B1a, B1b, B2a, B2b .... to B8a, B8b of the repeat of the papermachine clothing 101 according to the invention from Fig. 1. As can be seen, each form the longitudinal thread pairs B1a, B1b and B2a, B2b and B3a, B3b to B8a, B8b together when weaving with the paper-side transverse threads P1 to P16 the paper-side longitudinal thread paths 1 and 2 known from FIG 2 and 3 to 8. For the sake of clarity, no running longitudinal thread courses are designated, which are formed during weaving of the longitudinal thread pairs B1a, B1b and B2a, B2b and B3a, B3b to B8a, B8b with the running side transverse threads L1 to L8.

Claims (22)

Papiermaschinensieb, insbesondere Formiersieb, mit einer oberen sich in oberen Rapporten wiederholenden Gewebelage deren Außenseite die Papierseite des Siebs bildet und mit einer unteren Gewebelage deren Außenseite die Maschinenseite des Siebs bildet und mit in Gruppen angeordneten sich in LĂ€ngsfadenrichtung erstreckenden BindefĂ€den, welche die obere und die untere Gewebelage miteinander verbinden, - wobei die obere Gewebelage zumindest durch die BindefĂ€den und mit diesen verwobenen sich quer zu den BindefĂ€den erstreckenden oberen QuerfĂ€den gebildet wird, indem sich die BindefĂ€den jeder Gruppe beim Verweben mit den oberen QuerfĂ€den in LĂ€ngsfadenrichtung abschnittweise abwechseln und hierbei gemeinsam einen oberen LĂ€ngsfadenverlauf ausbilden, der sich nach der LĂ€nge des oberen Rapports in LĂ€ngsfadenrichtung wiederholt, - wobei die untere Gewebelage zumindest durch die BindefĂ€den und mit diesen verwobenen sich quer zu den BindefĂ€den erstreckenden unteren QuerfĂ€den gebildet wird, - wobei sich die BindefĂ€den jeder Gruppe beim Wechsel vom Verweben mit den oberen QuerfĂ€den zum Verweben mit den unteren QuerfĂ€den und umgekehrt unter Ausbildung von Kreuzungsstellen kreuzen, dadurch gekennzeichnet,
dass die BindefÀden zumindest einer Gruppe derart mit den oberen und unteren QuerfÀden verwoben sind, dass auf der LÀnge des oberen Rapports in LÀngsfadenrichtung zumindest zwei aufeinander folgende Kreuzungsstellen angeordnet sind.Papermaking fabric, in particular forming fabric, with an upper repeating in upper repeats fabric layer whose outer side forms the paper side of the screen and with a lower fabric layer whose outer side forms the machine side of the screen and arranged in groups extending in the longitudinal direction of thread binding threads which the upper and lower Connect the fabric layer, - The upper fabric layer is formed at least by the binding threads and these interwoven transversely to the binding threads extending upper transverse threads by the binding threads of each group when weaving with the upper transverse threads in the longitudinal direction of the thread alternately alternate and this together form an upper longitudinal thread course, the repeated in the longitudinal direction of the thread according to the length of the upper repeat - wherein the lower fabric layer is formed at least by the binding threads and with these interwoven transverse transverse threads extending transversely to the binding threads, in which the binding threads of each group intersect with the lower transverse threads during the change from interweaving with the upper transverse threads and vice versa, forming intersections, characterized,
that the binding threads at least one group are so interwoven with the upper and lower cross threads, that at least two successive crossing points are disposed on the length of the upper repeat in the longitudinal thread direction. Papiermaschinenbespannung nach Anspruch 1,
dadurch gekennzeichnet,
dass das obere Gewebe durch das Weben der oberen QuerfÀden mit den BindefÀden gebildet wird.Paper machine clothing according to claim 1,
characterized,
that the upper fabric is formed by weaving the upper transverse threads with the binding threads. Papiermaschinenbespannung nach Anspruch 1,
dadurch gekennzeichnet,
dass das obere Gewebe durch das Weben der oberen QuerfÀden mit den BindefÀden und mit oberen LÀngsfÀden gebildet wird.Paper machine clothing according to claim 1,
characterized,
that the upper fabric is formed by weaving the upper transverse threads with the binding threads and with upper longitudinal threads. Papiermaschinenbespannung nach einem der AnsprĂŒche 1 bis 3,
dadurch gekennzeichnet,
dass das untere Gewebe durch das Weben der unteren QuerfÀden mit den LÀngsfÀden gebildet wird.Paper machine clothing according to one of claims 1 to 3,
characterized,
that the lower fabric is formed by the weaving of the lower transverse threads with the longitudinal threads. Papiermaschinenbespannung nach einem der AnsprĂŒche 1 bis 3,
dadurch gekennzeichnet,
dass das untere Gewebe durch das Weben der unteren QuerfÀden mit den LÀngsfÀden und mit unteren LÀngsfÀden gebildet wird.Paper machine clothing according to one of claims 1 to 3,
characterized,
that the lower fabric is formed by the weaving of the lower transverse threads with the longitudinal threads and with lower longitudinal threads. Papiermaschinenbespannung nach einem der AnsprĂŒche 1 bis 5,
dadurch gekennzeichnet,
dass das VerhĂ€ltnis von oberen zu unteren QuerfĂ€den grĂ¶ĂŸer als 1, insbesondere 2:1 oder 3:2 ist.Paper machine clothing according to one of claims 1 to 5,
characterized,
that the ratio of upper to lower transverse threads is greater than 1, in particular 2: 1 or 3: 2. Papiermaschinenbespannung nach einem der AnsprĂŒche 1 bis 6,
dadurch gekennzeichnet,
dass jeder durch eine Gruppe von BindefĂ€den gebildeter obere LĂ€ngsfadenverlauf Bindefadenhebungen und Bindefadensenkungen umfasst, wobei eine Bindefadenhebung gebildet wird, indem der jeweils obere QuerfĂ€den webende Bindefaden einer Gruppe auf der Außenseite der oberen Gewebelage laufend einen oberen Querfaden kreuzt, wobei eine Bindefadensenkung gebildet wird, indem der jeweils obere QuerfĂ€den webende Bindefaden einer Gruppe zwischen oberer und unterer Gewebelage laufend einen oberen Querfaden kreuzt und wobei die Anordnung der Bindefadenhebungen und -senkungen im oberen Rapport ein unregelmĂ€ĂŸiges Muster bildet.Paper machine clothing according to one of claims 1 to 6,
characterized,
in that each upper longitudinal thread course formed by a group of binding threads comprises binder thread bumps and binder thread bumps, wherein a binding thread bump is formed by the upper thread crossing yarn of a group continuously crossing an upper thread on the outside of the upper fabric layer, forming a binding thread bump by forming the thread bobbin thread each upper transverse thread weaving binder threads a group between upper and lower fabric layer continuously crosses an upper transverse thread and wherein the arrangement of the binder thread bumps and depressions in the upper rapport forms an irregular pattern. Papiermaschinenbespannung nach Anspruch 7,
dadurch gekennzeichnet,
dass das unregelmĂ€ĂŸige Muster gebildet wird, indem im oberen Rapport zumindest zwei LĂ€ngsfadenverlĂ€ufe derart ausgebildet sind, dass sich der eine der beiden LĂ€ngsfadenverlĂ€ufe nicht durch Versatz aller seiner Bindefadenhebungen und -senkungen um eine gleiche Anzahl von oberen QuerfĂ€den in LĂ€ngsfadenrichtung aus dem anderen der beiden LĂ€ngsfadenverlĂ€ufe erzeugen lĂ€sst.Paper machine clothing according to claim 7,
characterized,
that the irregular pattern is formed by at least two LÀngsfadenverlÀufe are formed in the upper repeat that one of the two LÀngsfadenverlÀufe not by misalignment of all its Bindefadenhebungen and -senkungen by an equal number of upper transverse threads in the longitudinal thread direction from the other of the two LÀngsfadenverlÀufe produce leaves. Papiermaschinenbespannung nach Anspruch 8,
dadurch gekennzeichnet,
dass sich keiner der LÀngsfadenverlÀufe im oberen Rapport durch Versatz aller seiner Bindefadenhebungen und -senkungen um eine gleiche Anzahl von oberen QuerfÀden in LÀngsfadenrichtung aus einem anderen LÀngsfadenverlauf erzeugen lÀsst.Paper machine clothing according to claim 8,
characterized,
that none of the longitudinal thread courses in the upper repeat can be produced by offsetting all of its binding thread elevations and depressions by an equal number of upper transverse threads in the longitudinal thread direction from another longitudinal thread course. Papiermaschinenbespannung nach einem der AnsprĂŒche 7 bis 9,
dadurch gekennzeichnet,
dass das unregelmĂ€ĂŸige Muster gebildet wird, indem der obere Rapport einen ersten oberen LĂ€ngsfadenverlauf, einen dazu unmittelbar benachbarten zweiten LĂ€ngsfadenverlauf und einen zum zweiten unmittelbar benachbarten dritten LĂ€ngsfadenverlauf aufweist, die derart ausgebildet sind, dass der Versatz der LĂ€ngsfadenhebungen und LĂ€ngsfadensenkungen des zweiten LĂ€ngsfadenverlaufs relativ zu den LĂ€ngsfadenhebungen und -senkungen des ersten LĂ€ngsfadenverlaufs ungleich dem Versatz der LĂ€ngsfadenhebungen und LĂ€ngsfadensenkungen des dritten LĂ€ngsfadenverlaufs relativ zu den LĂ€ngsfadenhebungen und -senkungen des zweiten LĂ€ngsfadenverlaufs ist.Paper machine clothing according to one of claims 7 to 9,
characterized,
in that the irregular pattern is formed by the upper repeat having a first upper longitudinal thread course, a second longitudinal thread course directly adjacent thereto and a third immediately adjacent third longitudinal thread course, which are designed such that the offset of the longitudinal thread bumps and longitudinal thread bumps of the second longitudinal thread course relative to Longitudinal thread elevations and depressions of the first longitudinal thread course is not equal to the offset of the longitudinal thread elevations and longitudinal thread depressions of the third longitudinal thread course relative to the longitudinal thread elevations and depressions of the second longitudinal thread course. Papiermaschinenbespannung nach einem der AnsprĂŒche 7 bis 10,
dadurch gekennzeichnet,
dass die Anzahl von LĂ€ngsfadenhebungen und LĂ€ngsfadensenkungen im oberen Rapport im wesentlichen gleich ist.Paper machine clothing according to one of claims 7 to 10,
characterized,
that the number of longitudinal thread elevations and reductions of longitudinal threads in the upper repeat is substantially the same. Papiermaschinenbespannung nach einem der AnsprĂŒche 7 bis 11,
dadurch gekennzeichnet,
dass die unregelmĂ€ĂŸige Struktur des oberen Webmusters allein oder in Kombination gebildet wird durch: freie textile Entwicklung, VerĂ€nderung einer textilen Grundbindung, Ableitung einer textilen Grundbindung, Erweiterung einer textilen Grundbindung. Paper machine clothing according to one of claims 7 to 11,
characterized,
that the irregular structure of the upper weave pattern is formed alone or in combination by: Free textile development, alteration of a textile basic weave, derivation of a textile basic weave, extension of a textile basic weave. Papiermaschinenbespannung nach einem der AnsprĂŒche 7 bis 12,
dadurch gekennzeichnet,
dass jeweils maximal zwei obere LĂ€ngsfadenhebungen und maximal zwei obere LĂ€ngsfadensenkungen unmittelbar zueinander benachbart angeordnet sind.Paper machine clothing according to one of claims 7 to 12,
characterized,
that in each case a maximum of two upper longitudinal thread elevations and a maximum of two upper longitudinal thread depressions are arranged directly adjacent to each other. Papiermaschinenbespannung nach einem der AnsprĂŒche 1 bis 14,
dadurch gekennzeichnet,
dass jeder untere Querfaden durch jeweils mehrere BindefĂ€den gehalten wird, indem jeder dieser BindefĂ€den auf der Außenseite der unteren Gewebelage laufend den jeweiligen unteren Querfaden kreuzt, wobei manche der einen jeweiligen unteren Querfaden haltenden BindefĂ€den durch zumindest einen den jeweiligen unteren Querfaden nicht haltenden Bindefaden voneinander beabstandet sind, indem der nicht haltende Bindefaden nicht auf der Außenseite der unteren Gewebelage laufend den jeweiligen unteren Querfaden kreuzt, und wobei mehrere untere QuerfĂ€den vorgesehen sind, bei denen jeweils zwischen aufeinander folgenden, den jeweiligen unteren Querfaden haltenden BindefĂ€den eine gleiche Anzahl von nicht haltenden BindefĂ€den angeordnet ist.Paper machine clothing according to one of claims 1 to 14,
characterized,
that each lower transverse thread is held by a plurality of binding threads by each of these binding threads on the outside of the lower fabric layer continuously crosses the respective lower transverse thread, wherein some of the respective lower transverse thread-holding binding threads are spaced from each other by at least one of the respective lower transverse thread non-holding binding threads in that the non-holding binding thread does not continuously cross on the outside of the lower fabric layer the respective lower transverse thread, and wherein a plurality of lower transverse threads are provided, in each case between successive, the respective lower transverse thread holding binding threads an equal number of non-retaining binding threads is arranged , Papiermaschinensieb nach Anspruch 14,
dadurch gekennzeichnet,
dass fĂŒr jeden unteren QuerfĂ€den zwischen aufeinander folgenden, den unteren Querfaden jeweils haltenden BindefĂ€den, immer eine gleiche Anzahl von den unteren Querfaden nicht haltenden BindefĂ€den angeordnet ist.Papermaking fabric according to Claim 14,
characterized,
that for each lower transverse threads between successive, the lower transverse thread each retaining binding threads, always an equal number of binding threads not holding the lower transverse thread is arranged. Papiermaschinensieb nach Anspruch 14 oder 15,
dadurch gekennzeichnet,
dass die Anzahl der den jeweiligen Querfaden nicht haltenden BindefÀden zwischen zwei und zwanzig, bevorzugt zwischen sechs und zehn ist.Papermaking fabric according to Claim 14 or 15, characterized
characterized,
that the number of non-holding the respective transverse thread binder threads between two and twenty, preferably between six and ten. Papiermaschinensieb nach einem der AnsprĂŒche 1 bis 16,
dadurch gekennzeichnet,
dass der Rapport der oberen Gewebelage 14 oder mehr obere QuerfÀden umfasst.Papermaking fabric according to one of claims 1 to 16,
characterized,
that the repeat of the upper fabric layer 14 or more upper transverse threads comprising. Papiermaschinensieb nach einem der AnsprĂŒche 1 bis 17,
dadurch gekennzeichnet,
dass der Rapport der unteren Gewebelage sieben oder mehr untere QuerfÀden umfasst.Papermaking fabric according to one of claims 1 to 17,
characterized,
that the repeat of the lower fabric layer comprises seven or more lower transverse threads. Papiermaschinensieb nach einem der AnsprĂŒche 1 bis 18,
dadurch gekennzeichnet,
dass die BindefÀden in sieben Gruppen zu je zwei BindefÀden angeordnet sind.Papermaking fabric according to one of Claims 1 to 18,
characterized,
that the binding threads are arranged in seven groups of two binding threads. Papiermaschinensieb nach einem der AnsprĂŒche 1 bis 19,
dadurch gekennzeichnet,
dass der Gesamtrapport des Papiermaschinensiebs 24 oder mehr, oder 26 oder mehr oder 32 oder mehr oder 48 oder mehr LÀngsfÀden und / oder obere und untere QuerfÀden umfasst.Papermaking fabric according to one of Claims 1 to 19,
characterized,
that the overall repeat of the papermaker's fabric comprises 24 or more, or 26 or more, or 32 or more, or 48 or more longitudinal threads and / or upper and lower transverse threads. Papiermaschinensieb nach einem der AnsprĂŒche 1 bis 20,
dadurch gekennzeichnet,
dass die BindefÀden KettfÀden und die QuerfÀden SchussfÀden sind.Papermaking fabric according to one of Claims 1 to 20,
characterized,
that the binding threads are warp threads and the transverse threads are weft threads. Papiermaschinensieb nach einem der AnsprĂŒche 1 bis 20,
dadurch gekennzeichnet,
dass die BindefÀden SchussfÀden und die QuerfÀden KettfÀden sind.Papermaking fabric according to one of Claims 1 to 20,
characterized,
that the binding threads are weft threads and the transverse threads are warp threads.
EP06122507A 2005-12-16 2006-10-18 Papermaking fabric Not-in-force EP1798335B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005060301A DE102005060301A1 (en) 2005-12-16 2005-12-16 Paper machine clothing

Publications (2)

Publication Number Publication Date
EP1798335A1 true EP1798335A1 (en) 2007-06-20
EP1798335B1 EP1798335B1 (en) 2010-07-14

Family

ID=37762471

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06122507A Not-in-force EP1798335B1 (en) 2005-12-16 2006-10-18 Papermaking fabric

Country Status (5)

Country Link
US (1) US7503351B2 (en)
EP (1) EP1798335B1 (en)
AT (1) ATE474084T1 (en)
DE (2) DE102005060301A1 (en)
ES (1) ES2346785T3 (en)

Cited By (2)

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EP1936025A1 (en) * 2006-12-22 2008-06-25 Voith Patent GmbH Fabric for a production machine for sheet material and method for manufacturing such a fabric
CN102741474A (en) * 2010-05-21 2012-10-17 ćź‰ćŸ·é‡ŒèŒšæŠ€æœŻè”„äș§çźĄç†æœ‰é™ć…Źćž Sheet-forming wire

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DE102005060300A1 (en) * 2005-12-16 2007-06-21 Voith Patent Gmbh papermaker
US20080196784A1 (en) * 2007-02-15 2008-08-21 Scott Quigley Wear side weave pattern of a composite forming fabric
CN103088691B (en) * 2012-12-13 2016-06-01 ćź‰ćŸœć€ȘćčłæŽ‹ç‰čç§çœ‘äžšæœ‰é™ć…Źćž A kind of through the production technique to access node three-layer paper making net
JP7334099B2 (en) * 2019-09-17 2023-08-28 æ—„æœŹăƒ•ă‚šăƒ«ăƒˆæ ȘćŒäŒšç€Ÿ Two-ply woven fabric for papermaking

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WO2002000996A1 (en) * 2000-06-29 2002-01-03 Andreas Kufferath Gmbh & Co. Kg Paper making wire cloth
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Also Published As

Publication number Publication date
ES2346785T3 (en) 2010-10-20
EP1798335B1 (en) 2010-07-14
US20070137720A1 (en) 2007-06-21
DE102005060301A1 (en) 2007-06-21
US7503351B2 (en) 2009-03-17
ATE474084T1 (en) 2010-07-15
DE502006007409D1 (en) 2010-08-26

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