EP1586696B1 - Forming fabric - Google Patents

Forming fabric Download PDF

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Publication number
EP1586696B1
EP1586696B1 EP05102771A EP05102771A EP1586696B1 EP 1586696 B1 EP1586696 B1 EP 1586696B1 EP 05102771 A EP05102771 A EP 05102771A EP 05102771 A EP05102771 A EP 05102771A EP 1586696 B1 EP1586696 B1 EP 1586696B1
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EP
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Prior art keywords
machine direction
threads
binding
thread
forming fabric
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EP05102771A
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German (de)
French (fr)
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EP1586696A1 (en
Inventor
Stewart Lister Hay
Johann Boeck
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Voith Patent GmbH
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Voith Patent GmbH
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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 forming fabric according to the preamble of patent claim 1.
  • Forming screens are used in the forming section of a paper machine.
  • a fiber suspension is applied from the headbox of the paper machine to a forming fabric or to two forming fabrics (Gap formers). It is the task of forming fabrics to dewater the fiber suspension and to form a fibrous web, with as little pulp fibers and fillers as possible being washed out of the fiber suspension during the dewatering process.
  • the quality of the fibrous web formed is strongly influenced by the structure of the fibrous web-facing surface (paper side) of the forming fabric.
  • the life of the forming fabric is greatly affected by the structure of the paper machine facing surface (machine side) of the forming fabric.
  • multi-ply papermachine screens have been developed with a paper-side and a machine-side fabric, wherein the two independent fabrics are connected to each other by so-called stitching or binding threads.
  • stitching threads are an integral part of the paper-side weave structure (integral stitching threads), as a result of which marking tendencies due to the binding of the stitching threads are reduced.
  • each first and each second binding region is formed by running the first and second stitching yarns under at least two and at most three mutually adjacent lower machine direction yarns.
  • the paper-side weave structure and the machine-side weave structure are connected by the stitching thread (s) in which the stitching thread (s) coming from the paper-side weave structure are repeatedly formed under a lower, for example, machine direction yarn to create a weave area and subsequently woven again with threads from the paper-based weave structure.
  • the region of the machine-side weave structure, which is bound by the stitching thread is to be defined as the binding region, which span one or more lower MD threads.
  • the stitching thread on one side of the paper-side weave structure is fed to the MD thread, then passes under this MD thread and is then subsequently led away from the MD thread to the paper-side weave structure again.
  • the binding area is thus spanned by a lower MD thread.
  • two lower MD threads define the binding area; a first lower MD thread to which the stitching thread is fed from the paper side weave structure and under which the stitching thread runs, and a second lower MD thread under which the stitching thread runs and from which the stitching thread is fed back to the paper side weave structure, between them both lower MD threads of the stitching thread neither runs to the paper-side weave structure nor comes from this.
  • the force of the stitching thread acting in the direction of the paper-side weaving structure can not be transmitted due to the deflection of the "suspended" lower machine direction thread.
  • the invention is based on the consideration that the connection of the paper-side woven structure to the machine-side weave structure can be improved in a forming fabric with integral stitching threads by the force exerted by a stitching thread on the machine-side weave structure and acting in the direction of the machine-side weave structure from a lower (Machine-side) machine direction yarn (MD yarn) is divided on at least two maximum but three lower MD yarns. That According to the invention, it is a binding region with two to three lower MD threads.
  • these hinged lower MD yarns Due to the distribution of force from one to two or three lower MD yarns, these hinged lower MD yarns have a significantly smaller deflection than a single hinged lower MD yarn, thereby increasing the paper-side weave structure to the entire machine-side weave structure can be transmitted, so that the connection of the paper-side weaving structure is improved to the machine-side weaving structure. As a result, the forming fabric becomes thinner and more compact.
  • a binding portion is formed by passing the stitching thread under all the MD threads of the binding portion, whereby, contrary to the case where the stitching thread in the binding portion runs over one or more lower MD threads, the screen of the present invention is thinned can.
  • the first stitching thread or the second stitching thread runs under at least two and at most three mutually adjacent lower machine direction threads.
  • a preferred embodiment of the invention therefore provides that a maximum of three lower machine direction threads are arranged between a first and a second binding region.
  • the first stitching thread of a pair having a number of upper machine direction threads weaves first segments. Further, the pair's second stitching thread weaves second segments with a number of other top MD yarns, with the first and second segments arranged alternately one behind the other in the cross-machine direction.
  • the segment of the paper-side weave structure woven by a stitching thread should be defined as the segment, which span one or more upper MD threads.
  • the stitching thread is fed from the machine-side weave structure on one side to the upper MD thread, then passes over this upper MD thread and is then subsequently led away from the upper MD thread to the machine-side weave structure.
  • the segment is clamped by an upper MD thread.
  • two upper MD yarns delimit the segment; a first upper MD thread to which the stitching thread is fed from the machine side weave structure and over which the stitching thread runs and a second upper MD thread over which the stitching thread passes and from which the stitching thread is returned to the machine side weave structure, between these two Upper MD threads of the stitching thread neither to the machine-side weave structure still comes from this.
  • the weave structure formed by the upper MD threads and the upper cross-machine direction threads is continued by the first and the second segments.
  • the size of the segments has a direct influence on the marking tendency and the planarity of the paper-based web structure. If the segments are too small form "hard” binding sites with too much marking tendency. If the segments are too large, the paper-side weave structure may bulge around the segments, with the result that the planarity of the paper-side weave structure becomes unsatisfactory. Investigations have shown that a particularly smooth paper-side surface is created when each first and every second segment is formed with at least two and at most five mutually adjacent upper machine direction threads.
  • each first segment and the first binding region or between each second segment and the second binding region respectively a first and second transition region, in which the first and second stitching thread runs between mutually adjacent pairs of upper and lower machine direction threads, respectively.
  • a preferred embodiment therefore provides that each first and each second transition region is formed in each case with a maximum of three mutually adjacent pairs of upper and lower MD threads. This steep connection binds the paper-side and machine-side weave closer together. The more intimate connection between the two weave structures also reduces the so-called "edge-curl effect" (bulging of the edge areas of the screen).
  • the planarity of the paper-side weave structure can be further improved by running the first stitching thread of one pair per unit of repeat of the cross-machine direction weave structure above and below as many upper machine direction threads as the second stitching thread.
  • both stitching threads of each pair traverse the same path in the cross-machine direction during weaving with the upper and lower machine direction threads.
  • a preferred embodiment of the invention therefore provides that, per repeat unit of the cross-machine direction web structure, the first and second stitching yarns of each pair travel the same path under, over and between the upper and lower machine direction yarns.
  • the paper-side weave structure of the forming fabric according to the invention is formed as a plain weave pattern.
  • a preferred embodiment of the invention provides that the first and the second segments each having three adjacent upper machine direction yarns, the first and the second transition regions each having a maximum of two mutually adjacent pairs of upper and lower machine direction yarns and the first and the second bonding regions each with two mutually adjacent lower machine direction threads are formed.
  • a preferred embodiment of the invention provides that between two mutually adjacent pairs of first and second stitching threads, two lower cross machine direction yarns and one upper cross machine direction yarn are arranged. This ratio corresponds to a CD thread ratio of 1: 1.
  • two lower transverse machine direction threads and two upper cross machine direction threads are arranged between two mutually adjacent pairs of first and second stitching threads.
  • This ratio corresponds to a CD thread ratio of 3: 2.
  • a further embodiment of the invention provides that a lower transverse machine direction yarn and an upper transverse machine direction yarn are arranged between two mutually adjacent pairs of first and second tacking yarns. This ratio corresponds to a CD thread ratio of 2: 1.
  • each of the lower CMD yarns passes over one and then under at least seven machine direction yarns adjacent each other.
  • Another advantage of the so-called long floating is that the proportion of lower CD threads within the screen is reduced, which on the one hand makes a smaller thickness of the screen possible and on the other hand can result in lower drainage resistance.
  • a further preferred embodiment of the invention provides that at least two pairs of first and second stitching threads are arranged directly adjacent to each other. Generally, by increasing the pairs of twine, the number of tethers is increased, thereby achieving a better bonding of the upper weave structure to the lower weave structure and a higher stiffness of the forming fabric.
  • each pair of first and second stitching threads are arranged between at least two upper CMD yarns.
  • first and second stitching yarns of a pair of stitching yarns may be disposed relative to the bottom CMD yarns.
  • a preferred embodiment of the invention provides that at least one pair of stitching threads is provided in which a lower cross machine direction yarn is arranged between the first stitching thread and the second stitching thread of the pair.
  • a further preferred embodiment of the invention provides that at least one pair of stitching threads is provided in which the first and second stitching threads are arranged between at least two bottom CMD threads.
  • a lower tying site formed by passing a lower cross machine direction yarn below a first lower machine direction yarn and over a second lower machine direction yarn adjacent thereto, the second lower machine direction yarn immediately adjacent a lower machine direction yarn of a first machine direction yarn second binding region is arranged.
  • the second lower machine direction thread is a lower machine direction thread of the first or second binding area.
  • the repeat unit is a forming fabric in which the repeat unit has 8 upper and 8 lower machine direction yarns.
  • FIG. 1 shows a repeat unit of the weaving pattern of a forming fabric according to the invention.
  • the forming fabric comprises a plurality of upper MD yarns 1,3,5,7,9,11,13,15, a plurality of lower MD yarns 2,4,6,8,10,12,14,16, a Plurality of upper CD threads T1, T2, T3, T4, a plurality of lower CD threads B1, B2, B3, ..., B8, and pairs of first and second stitching threads I1 and I2, I3 and I4, I5 and I6 , I7 and I8.
  • the repeat unit 8 has upper and 8 lower machine direction threads.
  • the repeat unit is constituted by the lower and upper MD threads 1 to 16, the upper CD threads T1, T2, T3, T4, the lower CD threads B1 to B8, and the pairs of first and second stitching threads I1 and I2, I3 and I4, I5 and I6, I7 and I8.
  • the repeat unit is thus formed by 16 MD or warp threads.
  • the paper-side weave structure is formed by interweaving the upper MD yarns 1,3,5,7,9,11,13,15 with the upper CD yarns T1, T2, T3, T4 and in which the upper MD Yarns 1, 3, 5, 7, 9, 11, 13, 15 are respectively interwoven with the first and second stitching yarns I1 and I2, I3 and I4, I5 and I6, I7 and I8 of a pair so as to produce that of upper MD threads 1,3,5,7,9,11,13,15 and the upper CD threads T1, T2, T3, T4 formed web structure is continued.
  • the upper CD thread T1 passes over the upper MD threads 1,5,9,13, etc. and below the upper MD threads 3,7,11,15.
  • the stitching thread I1 runs in the repeat unit over the upper MD threads 3, 7 and under the upper MD thread 5.
  • the stitching thread 12 runs in the repeat unit over the upper MD threads 11,15 and under the upper MD thread 13th
  • the weaving of the stitching thread 11 with the upper MD threads 3,5,7 forms a first segment A. Furthermore, the weaving of the stitching thread 12 with the upper MD threads 11,13,15 forms a second segment B.
  • the first and second segments are alternately successively in the CD direction, i. in this order, the weave structure formed by the upper MD yarns 1,3,3,7,11,13,15 and the upper CD yarn T1 is continued.
  • the paper-side weave structure is a plain weave pattern.
  • the machine-side weave structure is formed by the lower MD threads 2,4,6,8,10,12,14,16 are interwoven with the lower CD threads B1, B2, B3, .... B8.
  • the lower CD thread B1 runs over the lower MD thread 2 and then under the seven mutually adjacent MD threads 4, 6, 8, 10, 12, 14 and 16.
  • the course of the CD thread B1 over the MD Thread 2 defines a lower attachment point I.
  • the lower attachment points will be discussed later.
  • machine-side weave structure forms an 8 shaft "Atlas weave pattern”.
  • the paper-side and the machine-side weave structures are connected to each other, in which the lower MD threads 2,4,6,8,10,12,14,16 with the first and second stitching threads 11 and I2, I3 and I4, I5 and I6, I7 and I8 of each pair are interwoven.
  • the stitching thread 11 runs under the lower MD threads 12 and 14 in each repeat unit.
  • the stitching thread 21 runs under the lower MD threads 4 and 6 in each repeat unit.
  • the weaving of the stitching thread 11 with the lower MD threads 12 and 14 forms a first binding region OO. Furthermore, the weaving of the stitching thread 12 with the lower MD threads 4 and 6 forms a second binding region XX.
  • each first binding region OO and each second binding region XX is formed by passing the first stitching thread I1 and the second stitching thread 12 respectively under two lower machine direction threads adjacent to each other.
  • the first and second binding regions are alternately successively in the CD direction, i. arranged in the order XX, OO.
  • the two lower MD threads 8 and 10 are arranged.
  • first segment A formed at 3,5,7) and the first binding portion OO (formed at 12,14) is disposed a first transition region in which the first stitching yarn I1 extends between the pair of upper and lower machine direction yarns 9 and 10 ,
  • the forming fabric of the invention FIG. 1 has a CD thread ratio of 1: 1.
  • two lower cross machine direction yarns and one upper cross machine direction yarn are always interposed between two mutually adjacent pairs of first and second stitching yarns.
  • the lower CD threads B2 and B3 and the upper CD thread T2 are arranged. Since each pair of stitching threads continues the weave pattern of an upper CD thread, this results in a CD thread ratio of 1: 1.
  • the pair of stitching threads I1 and I2 between the two upper cross-machine direction yarns T 1 and T2 is arranged. Further, the pair of stitching yarns I1 and I2 are arranged between the two lower cross-machine direction yarns B1 and B2.
  • the lower attachment point I is determined by the course of the lower CD thread B1 over the MD thread 2. Furthermore, the lower attachment points K are determined by the course of the lower CD thread B2 over the MD thread 8.
  • a bottom tie is generally defined by passing a bottom cross machine direction yarn under a first bottom machine direction yarn and over a second machine direction lower yarn adjacent thereto. That
  • the first lower MD threads are formed by the MD threads 4, 16 (for B1) and 6, 10 (for B2), the second lower MD threads being formed by the lower MD thread 2 (FIG. for B1) and 8 (for B2).
  • the lower MD thread 2 is arranged immediately adjacent to the lower MD thread 4 of the second binding region XX.
  • FIG. 2 shows for second repeat units, the arrangement of the binding sites and the binding areas of the weave pattern of the machine side of the embodiment of FIG. 1 ,
  • Each field represents the area in which the lower MD threads 2, 4, 6, 8, 10,... 32 (1 to 16 first repeat unit and 17 to 32 second repeat unit) are connected to the lower CD threads B1 , B2, B3, ... B8 and the first stitching threads I1, I3, I5, .. and the second stitching threads I2, I4, I6, ... are interwoven.
  • locations designated XX represent second bond areas and the locations labeled OO are first bond areas, some of which correspond to the FIG. 1 Marked are.
  • the places marked with ⁇ indicate lower connection points.
  • FIG. 2a Fig. 12 shows the arrangement of the binding sites as well as the bonding regions of the weave pattern of the machine side in the case where the first and second stitching yarns of the pairs of stitching yarns are interposed between two lower cross-machine direction yarns.
  • the stitching threads I1 and I2 are arranged between the lower CD threads B1 and B2. Furthermore, the stitching threads 13 and 14 are arranged between the lower CD threads B3 and B4.
  • FIG. 2b shows the arrangement of the binding sites as well as the binding areas of the weave pattern of the machine side for the case in which between the first and the second stitching threads of the pairs of stitching threads respectively a lower CD thread is arranged.
  • the two lower CD threads B1 and B2 are arranged between the stitching thread I1.
  • the two lower CD threads B2 and B3 are arranged between the stitching thread 12 .
  • FIG. 3 two repeat units of the weave pattern of a second embodiment of the invention in CD direction with a DC thread ratio of 3: 2.

Abstract

In a papermaking process a fibrous suspension is sandwiched between two forming sieves. The sieve has a first outer set of wire threads aligned in the direction of travel, followed by a layer of transverse wire threads, followed by a layer of wire threads aligned with the direction of travel, followed by a layer of transverse threads, followed by pairs of first staples and second staples. The two outer layers are linked by wire staples.

Description

Die Erfindung betrifft ein Formiersieb nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a forming fabric according to the preamble of patent claim 1.

Formiersiebe finden in der Formierpartie- einer Papiermaschine Verwendung. Beim Formierprozess wird eine Fasersuspension vom Stoffauflauf der Papiermaschine auf ein Formiersieb oder auf zwei Formiersiebe (bei Gap - Formern) aufgebracht. Es ist die Aufgabe von Formiersieben die Fasersuspension zu entwässern und eine Faserstoffbahn zu bilden, wobei beim Entwässerungsprozess so wenig wie möglich Zellstofffasern und Füllstoffe aus der Fasersuspension aus geschwemmt werden sollen.Forming screens are used in the forming section of a paper machine. In the forming process, a fiber suspension is applied from the headbox of the paper machine to a forming fabric or to two forming fabrics (Gap formers). It is the task of forming fabrics to dewater the fiber suspension and to form a fibrous web, with as little pulp fibers and fillers as possible being washed out of the fiber suspension during the dewatering process.

Die Qualität der gebildeten Faserstoffbahn wird hierbei stark von der Struktur der zur Faserstoffbahn weisenden Oberfläche (Papierseite) des Formiersiebs mitbestimmt. Die Lebensdauer des Formiersiebs wird hingegen stark von der Struktur der zur Papiermaschine weisenden Oberfläche (Maschinenseite) des Formiersiebs beeinflusst.The quality of the fibrous web formed is strongly influenced by the structure of the fibrous web-facing surface (paper side) of the forming fabric. On the other hand, the life of the forming fabric is greatly affected by the structure of the paper machine facing surface (machine side) of the forming fabric.

Um diesen zum Teil sich widersprechenden Anforderungen Rechnung zu tragen wurden mehrlagige Papiermaschinensiebe mit einem papierseitigen und einem maschinenseitigen Gewebe entwickelt, wobei die beiden unabhängigen Gewebe durch sog. Heft- oder Bindfäden miteinander verbunden sind. Um eine möglichst einheitliche papierseitige Gewebestruktur zu gewährleisten, sind die Heftfäden bevorzugt integraler Bestandteil der papierseitigen Webstruktur (integrale Heftfäden), wodurch Markierungsneigungen bedingt durch die Anbindung der Heftfäden reduziert werden.In order to meet these partly conflicting requirements, multi-ply papermachine screens have been developed with a paper-side and a machine-side fabric, wherein the two independent fabrics are connected to each other by so-called stitching or binding threads. In order to ensure as uniform a paper-side fabric structure as possible, the stitching threads are an integral part of the paper-side weave structure (integral stitching threads), as a result of which marking tendencies due to the binding of the stitching threads are reduced.

Beispiele für solche Formiersiebe sind in der US 5,152,326 oder der DE 297 24 238 U1 gezeigt.Examples of such forming fabrics are in the US 5,152,326 or the DE 297 24 238 U1 shown.

Aus der EP 1 158 090 ist des Weiteren ein zweilagiges Formiersieb gemäß den Oberbegriff des vorliegenden Auspruchs 1 bekannt.From the EP 1 158 090 Furthermore, a two-ply Formiersieb according to the preamble of the present Auspruchs 1 is known.

Es ist die Aufgabe der vorliegenden Erfindung ein Formiersieb vorzuschlagen, bei dem die Anbindung zwischen den papierseitigen Gewebe und dem maschinenseitigen Gewebe verbessert ist.It is the object of the present invention to propose a forming fabric in which the connection between the paper-side fabric and the machine-side fabric is improved.

Die Aufgabe wird erfindungsgemäß durch die Merkmale des Patentanspruchs 1 gelöst.The object is achieved by the features of claim 1.

Vorteilhafte Ausführungsformen und Weiterbildungen der Erfindung sind in den Unteransprüchen angegeben.Advantageous embodiments and further developments of the invention are specified in the subclaims.

Nach einem ersten Aspekt der Erfindung ist ein Formiersieb vorgesehen mit oberen Maschinenrichtungsfäden, oberen Maschinenquerrichtungsfäden, unteren Maschinenrichtungsfäden, unteren Maschinenquerrichtungsfäden und Paaren von ersten und zweiten Heftfäden,

  • wobei eine papierseitige Webstruktur gebildet wird, in dem die oberen Maschinenrichtungsfäden mit den oberen Maschinenquerrichtungsfäden verwoben sind und in dem die oberen Maschinenrichtungsfäden mit ersten und zweiten Heftfäden eines Paares jeweils derart verwoben sind, dass dadurch das von den oberen Maschinenrichtungsfäden und den oberen Maschinenquerrichtungsfäden gebildete Webstruktur fortgesetzt wird,
  • wobei eine maschinenseitige Webstruktur gebildet wird, in dem die unteren Maschinenrichtungsfäden mit den unteren Maschinenquerrichtungsfäden verwoben sind, und
  • wobei die papierseitige und die maschinenseitige Webstruktur miteinander verbunden sind, in dem der erste Heftfaden jedes Paares mit unteren Maschinenrichtungsfäden verwoben ist und erste Bindungsbereiche bildet und in dem der zweite Heftfaden jedes Paares mit unteren Maschinenrichtungsfäden verwoben ist und zweite Bindungsbereiche bildet und wobei die ersten und zweiten Bindungsbereiche in Maschinenquerrichtung abwechselnd hintereinander liegend angeordnet sind,
und wobei zumindest ein erster und / oder zweiter Bindungsbereich dadurch gebildet wird, in dem der erste Heftfaden und / oder der zweite Heftfaden jeweils unter zumindest zwei und maximal drei zueinander benachbarten unteren Maschinenrichtungsfäden läuft.According to a first aspect of the invention, there is provided a forming fabric having upper machine direction yarns, upper cross machine direction yarns, lower machine direction yarns, lower cross machine direction yarns and pairs of first and second stitching yarns.
  • forming a paper-side weave structure in which the upper machine direction yarns are interwoven with the upper CMD yarns and in which the upper machine direction yarns are interwoven with first and second stitching yarns of a pair, thereby continuing the weaving structure formed by the upper machine direction yarns and the upper CMD yarns becomes,
  • forming a machine side weave structure in which the bottom machine direction yarns are interwoven with the bottom cross machine direction yarns, and
  • wherein the paper-side and machine-side weave structures are joined together, in which the first stitching thread of each pair is woven with lower machine direction threads and forms first binding regions and in which the second stitching thread of each pair is interwoven with lower machine direction threads and forms second bonding regions, and wherein the first and second Binding areas are arranged alternately one behind the other in the cross machine direction,
and wherein at least one first and / or second binding region is formed by running the first stitching thread and / or the second stitching thread respectively under at least two and at most three mutually adjacent bottom machine direction threads.

Vorzugsweise wird jeder erste und jeder zweite Bindungsbereich dadurch gebildet, in dem der erste und der zweite Heftfaden jeweils unter zumindest zwei und maximal drei zueinander benachbarten unteren Maschinenrichtungsfäden läuft.Preferably, each first and each second binding region is formed by running the first and second stitching yarns under at least two and at most three mutually adjacent lower machine direction yarns.

Bei den bekannten Formiersieben mit integralen Heftfäden werden die papierseitige Webstruktur und die maschinenseitige Webstruktur durch den oder die Heftfäden dadurch verbunden, in dem wiederholt der oder die Heftfäden, von der papierseitigen Webstruktur kommend, unter einem unteren bspw. Maschinenrichtungsfaden unter Schaffung eines Bindungsbereichs durchgeführt werden und anschließend wieder mit Fäden der papierseitigen Webstruktur verwoben werden.In the known forming fabrics with integral stitching yarns, the paper-side weave structure and the machine-side weave structure are connected by the stitching thread (s) in which the stitching thread (s) coming from the paper-side weave structure are repeatedly formed under a lower, for example, machine direction yarn to create a weave area and subsequently woven again with threads from the paper-based weave structure.

Als Bindungsbereich soll hierbei der durch den Heftfaden eingebundene Bereich der maschinenseitigen Webstruktur definiert werden, den ein oder mehrere untere MD-Fäden aufspannen.In this case, the region of the machine-side weave structure, which is bound by the stitching thread, is to be defined as the binding region, which span one or more lower MD threads.

Bei einem MD-Faden wird der Heftfaden auf der einen Seite von der papierseitigen Webstruktur dem MD-Faden zugeführt, läuft dann unter diesem MD-Faden und wird dann anschließend vom MD-Faden zur papierseitigen Webstruktur wieder weggeführt. Der Bindungsbereich wird somit durch einen unteren MD-Faden aufgespannt.In an MD thread, the stitching thread on one side of the paper-side weave structure is fed to the MD thread, then passes under this MD thread and is then subsequently led away from the MD thread to the paper-side weave structure again. The binding area is thus spanned by a lower MD thread.

Handelt es sich um zwei oder mehr untere MD-Fäden begrenzen zwei untere MD-Fäden den Bindungsbereich; ein erster unterer MD-Faden, dem der Heftfaden von der papierseitigen Webstruktur zugeführt wird und unter dem der Heftfaden läuft und ein zweiter unterer MD-Faden, unter dem der Heftfaden läuft und von dem der Heftfaden wieder der papierseitigen Webstruktur zugeführt wird, wobei zwischen diesen beiden unteren MD-Fäden der Heftfaden weder zur papierseitigen Webstruktur läuft noch von dieser kommt.If there are two or more lower MD threads, two lower MD threads define the binding area; a first lower MD thread to which the stitching thread is fed from the paper side weave structure and under which the stitching thread runs, and a second lower MD thread under which the stitching thread runs and from which the stitching thread is fed back to the paper side weave structure, between them both lower MD threads of the stitching thread neither runs to the paper-side weave structure nor comes from this.

Wird der Heftfaden in nur einen unteren bspw. Maschinenrichtungsfaden eingehängt, kann die in Richtung der papierseitigen Webstruktur wirkende Kraft des Heftfadens aufgrund der Durchbiegung des "eingehängten" unteren Maschinenrichtungsfadens nicht übertragen werden.If the stitching thread is hung in only one lower, for example, machine direction thread, the force of the stitching thread acting in the direction of the paper-side weaving structure can not be transmitted due to the deflection of the "suspended" lower machine direction thread.

Die Erfindung geht von der Überlegung aus, dass die Anbindung der papierseitigen Webstruktur an die maschinenseitigen Webstruktur bei einem Formiersieb mit integralen Heftfäden dadurch verbessert werden kann, indem die von einem Heftfaden auf die maschinenseitige Webstruktur ausgeübte und in Richtung der maschinenseitigen Webstruktur wirkende Kraft von einem unteren (maschinenseitigen) Maschinenrichtungsfaden (MD-Faden) auf zumindest zwei maximal aber drei untere MD-Fäden aufgeteilt wird. D.h. erfindungsgemäß handelt es sich um einen Bindungsbereich mit zwei bis drei unteren MD-Fäden. Aufgrund der Verteilung der Kraftwirkung von ein auf zwei oder drei unteren MD-Fäden weisen diese eingehängten unteren MD-Fäden eine bedeutend kleinere Durchbiegung auf als bei nur einem eingehängten unteren MD-Faden, wodurch die in Richtung papierseitige Webstruktur weisende Kraft auf die gesamte maschinenseitige Webstruktur übertragen werden kann, so dass die Anbindung der papierseitigen Webstruktur an die maschinenseitige Webstruktur verbessert wird. Dies hat zur Folge, dass das Formiersieb dünner und kompakter wird.The invention is based on the consideration that the connection of the paper-side woven structure to the machine-side weave structure can be improved in a forming fabric with integral stitching threads by the force exerted by a stitching thread on the machine-side weave structure and acting in the direction of the machine-side weave structure from a lower (Machine-side) machine direction yarn (MD yarn) is divided on at least two maximum but three lower MD yarns. That According to the invention, it is a binding region with two to three lower MD threads. Due to the distribution of force from one to two or three lower MD yarns, these hinged lower MD yarns have a significantly smaller deflection than a single hinged lower MD yarn, thereby increasing the paper-side weave structure to the entire machine-side weave structure can be transmitted, so that the connection of the paper-side weaving structure is improved to the machine-side weaving structure. As a result, the forming fabric becomes thinner and more compact.

Des weiteren wird ein Bindungsbereich erfindungsgemäß dadurch gebildet, dass der Heftfaden unter sämtlichen MD-Fäden des Bindungsbereichs läuft, wodurch, im Gegensatz zum Fall in dem der Heftfaden im Bindungsbereich über einen oder mehrere untere MD-Fäden laufen würde, das erfindungsgemäße Sieb dünner gehalten werden kann.Further, according to the present invention, a binding portion is formed by passing the stitching thread under all the MD threads of the binding portion, whereby, contrary to the case where the stitching thread in the binding portion runs over one or more lower MD threads, the screen of the present invention is thinned can.

Untersuchungen haben gezeigt, dass die Anbindung nicht weiter verbessert werden kann, wenn die Anzahl der MD-Fäden unter denen ein Heftfaden läuft größer als drei ist.Investigations have shown that the connection can not be further improved if the number of MD threads under which a stitching thread runs is greater than three.

Durch die verbesserte Anbindung der papierseitigen Webstruktur an die maschinenseitige Webstruktur wird auch die Biegesteifigkeit des Formiersiebs erhöht.Due to the improved connection of the paper-side weave structure to the machine-side weave structure, the bending stiffness of the forming fabric is also increased.

Nach einer besonders bevorzugten Ausgestaltung der Erfindung ist vorgesehen, dass bei jedem ersten und / oder bei jedem zweiten Bindungsbereich der erste Heftfaden bzw. der zweite Heftfaden unter zumindest zwei und maximal drei zueinander benachbarten unteren Maschinenrichtungsfäden läuft. Durch diese Ausgestaltung werden die oben beschriebenen Effekte verstärkt und somit die Anbindung der papierseitigen Webstruktur an die maschinenseitige Webstruktur weiter verbessert.According to a particularly preferred embodiment of the invention, it is provided that, for each first and / or every second binding region, the first stitching thread or the second stitching thread runs under at least two and at most three mutually adjacent lower machine direction threads. This embodiment enhances the effects described above and thus further improves the connection of the paper-side weave structure to the machine-side weave structure.

Um die Anbindung der papierseitigen Webstruktur an die maschinenseitige Webstruktur weiter zu verbessern ist es des weiteren sinnvoll, wenn auf der Maschinenseite so viel wie möglich erste und zweite hintereinander angeordnete Bindungsbereiche angeordnet sind. Eine bevorzugte Ausführungsform der Erfindung sieht deshalb vor, dass zwischen einem ersten und einem zweiten Bindungsbereich maximal drei untere Maschinenrichtungsfäden angeordnet sind.In order to further improve the connection of the paper-side weave structure to the machine-side weave structure, it also makes sense to arrange as much first and second successive binding regions as possible on the machine side. A preferred embodiment of the invention therefore provides that a maximum of three lower machine direction threads are arranged between a first and a second binding region.

Bei jedem Paar von Heftfäden webt der erste Heftfaden eines Paares mit einer Anzahl von oberen Maschinenrichtungsfäden erste Segmente. Des weiteren webt der zweite Heftfaden des Paares webt mit einer Anzahl von anderen oberen Maschinenrichtungsfäden zweite Segmente, wobei die ersten und zweiten Segmente in Maschinenquerrichtung abwechselnd hintereinander liegend angeordnet sind.For each pair of stitching yarns, the first stitching thread of a pair having a number of upper machine direction threads weaves first segments. Further, the pair's second stitching thread weaves second segments with a number of other top MD yarns, with the first and second segments arranged alternately one behind the other in the cross-machine direction.

Als Segment soll hierbei der durch einen Heftfaden gewobene Bereich der papierseitigen Webstruktur definiert werden, den ein oder mehrere obere MD-Fäden aufspannen.In this case, the segment of the paper-side weave structure woven by a stitching thread should be defined as the segment, which span one or more upper MD threads.

Bei einem oberen MD-Faden wird der Heftfaden von der maschinenseitigen Webstruktur auf der einen Seite dem oberen MD-Faden zugeführt, läuft dann über diesem oberen MD-Faden und wird dann anschließend vom oberen MD-Faden zur maschinenseitigen Webstruktur wieder weggeführt. Das Segment wird hierbei durch einen oberen MD-Faden aufgespannt.In an upper MD thread, the stitching thread is fed from the machine-side weave structure on one side to the upper MD thread, then passes over this upper MD thread and is then subsequently led away from the upper MD thread to the machine-side weave structure. The segment is clamped by an upper MD thread.

Handelt es sich um zwei oder mehr obere MD-Fäden, begrenzen zwei obere MD-Fäden das Segment; ein erster oberer MD-Faden, dem der Heftfaden von der maschinenseitigen Webstruktur zugeführt wird und über dem der Heftfaden läuft und ein zweiter oberer MD-Faden über dem der Heftfaden läuft und von dem der Heftfaden wieder der maschinenseitigen Webstruktur zugeführt wird, wobei zwischen diesen beiden oberen MD-Fäden der Heftfaden weder zur maschinenseitigen Webstruktur läuft noch von dieser kommt.If there are two or more upper MD yarns, two upper MD yarns delimit the segment; a first upper MD thread to which the stitching thread is fed from the machine side weave structure and over which the stitching thread runs and a second upper MD thread over which the stitching thread passes and from which the stitching thread is returned to the machine side weave structure, between these two Upper MD threads of the stitching thread neither to the machine-side weave structure still comes from this.

Bei integralen Heftfäden wird hierbei durch die ersten und die zweiten Segmente die von den oberen MD-Fäden und den oberen Maschinenquerrichtungsfäden (CD-Fäden) gebildete Webstruktur fortgesetzt. Auf die Markierungsneigung und die Planarität der papierseitigen Webstruktur hat hierbei die Größe der Segmente unmittelbaren Einfluss. Sind die Segmente zu klein bilden sich "harte" Anbindestellen mit zu großer Markierungsneigung. Sind die Segmente zu groß, kann sich die papierseitige Webstruktur im Bereich der Segmente aufwölben, mit der Folge, dass die Planarität der papierseitigen Webstruktur unbefriedigend wird. Untersuchungen haben gezeigt, dass eine besonders glatte papierseitige Oberfläche geschaffen wird, wenn jedes erste und jedes zweite Segment jeweils mit zumindest zwei und maximal fünf zueinander benachbarten oberen Maschinenrichtungsfäden gebildet wird.In the case of integral stitching threads, the weave structure formed by the upper MD threads and the upper cross-machine direction threads (CD threads) is continued by the first and the second segments. The size of the segments has a direct influence on the marking tendency and the planarity of the paper-based web structure. If the segments are too small form "hard" binding sites with too much marking tendency. If the segments are too large, the paper-side weave structure may bulge around the segments, with the result that the planarity of the paper-side weave structure becomes unsatisfactory. Investigations have shown that a particularly smooth paper-side surface is created when each first and every second segment is formed with at least two and at most five mutually adjacent upper machine direction threads.

Zwischen jedem ersten Segment und ersten Bindungsbereich bzw. zwischen jedem zweiten Segment und zweiten Bindungsbereich verläuft jeweils ein erster bzw. zweiter Übergangsbereich, in dem der erste bzw. zweite Heftfaden zwischen zueinander benachbarten Paaren von oberen und unteren Maschinenrichtungsfäden läuft. Um die Anbindung der papierseitigen Webstruktur an die maschinenseitige Webstruktur weiter zu verbessern ist es sinnvoll, wenn die Bindungsbereiche eines Heftfadens in CD-Richtung jeweils wenig von den Segmenten beabstandet sind. Eine bevorzugte Ausführungsform sieht deshalb vor, dass jeder erste und jeder zweite Übergangsbereich jeweils mit maximal drei zueinander benachbarten Paaren aus oberen und unteren MD-Fäden gebildet wird. Durch diese steile Anbindung werden die papierseitige und die maschinenseitige Webstruktur dichter aneinander gebunden. Durch die innigere Verbindung zwischen den beiden Webstrukturen wird nicht zuletzt auch der sog. "Edge - Curl - Effekt" (Aufwölben der Randbereiche des Siebs) reduziert.Between each first segment and the first binding region or between each second segment and the second binding region, respectively a first and second transition region, in which the first and second stitching thread runs between mutually adjacent pairs of upper and lower machine direction threads, respectively. In order to further improve the connection of the paper-side weave structure to the machine-side weave structure, it makes sense if the binding regions of a stitching thread in the CD direction are respectively spaced a little from the segments. A preferred embodiment therefore provides that each first and each second transition region is formed in each case with a maximum of three mutually adjacent pairs of upper and lower MD threads. This steep connection binds the paper-side and machine-side weave closer together. The more intimate connection between the two weave structures also reduces the so-called "edge-curl effect" (bulging of the edge areas of the screen).

Die Planarität der papierseitigen Webstruktur kann dadurch weiter verbessert werden, in dem der erste Heftfaden eines Paares pro Wiederholungseinheit der Webstruktur in Maschinenquerrichtung über und unter gleich vielen oberen Maschinenrichtungsfäden läuft wie der zweite Heftfaden.The planarity of the paper-side weave structure can be further improved by running the first stitching thread of one pair per unit of repeat of the cross-machine direction weave structure above and below as many upper machine direction threads as the second stitching thread.

Um dem oben beschriebenen "Edge - Curl - Effekt" weiter entgegenzuwirken ist es sinnvoll, wenn beide Heftfäden jedes Paares pro Wiederholungseinheit in Maschinenquerrichtung beim Weben mit den oberen und unteren Maschinenrichtungsfäden den gleichen Weg zurücklegen. Dadurch werden von beiden Heftfäden eines Paares gleiche Spannungen in das Sieb eingetragen. Eine bevorzugte Ausführungsform der Erfindung sieht deshalb vor, dass pro Wiederholungseinheit der Webstruktur in Maschinenquerrichtung die ersten und die zweiten Heftfäden jedes Paares den gleichen Weg unter, über und zwischen den oberen und unteren Maschinenrichtungsfäden laufen.In order to further counteract the "edge-curl" effect described above, it is expedient if both stitching threads of each pair traverse the same path in the cross-machine direction during weaving with the upper and lower machine direction threads. As a result, equal stresses are introduced into the wire by both stitching threads of a pair. A preferred embodiment of the invention therefore provides that, per repeat unit of the cross-machine direction web structure, the first and second stitching yarns of each pair travel the same path under, over and between the upper and lower machine direction yarns.

Vorzugsweise ist die die papierseitige Webstruktur des erfindungsgemäßen Formiersiebs als Leinwandbindungsmuster ausgebildet.Preferably, the paper-side weave structure of the forming fabric according to the invention is formed as a plain weave pattern.

Eine bevorzugte Ausführungsform der Erfindung sieht vor, dass die ersten und die zweiten Segmente jeweils mit drei zueinander benachbarten oberen Maschinenrichtungsfäden, die ersten und die zweiten Übergangsbereiche jeweils mit maximal zwei zueinander benachbarten Paaren aus oberen und unteren Maschinenrichtungsfäden und die ersten und die zweiten Bindungsbereiche jeweils mit zwei zueinander benachbarten unteren Maschinenrichtungsfäden gebildet werden.A preferred embodiment of the invention provides that the first and the second segments each having three adjacent upper machine direction yarns, the first and the second transition regions each having a maximum of two mutually adjacent pairs of upper and lower machine direction yarns and the first and the second bonding regions each with two mutually adjacent lower machine direction threads are formed.

Selbstverständlich sind beim erfindungsgemäßen Formiersieb unterschiedliche Verhältnisse zwischen oberen und unteren Maschinenquerrichtungsfäden möglich. Eine bevorzugte Ausführungsform der Erfindung sieht vor, dass zwischen zwei zueinander benachbarten Paaren von ersten und zweiten Heftfäden zwei untere Maschinenquerrichtungsfäden und ein oberer Maschinenquerrichtungsfaden angeordnet sind. Dieses Verhältnis entspricht einem CD-Faden Verhältnis von 1:1.Of course, different ratios between upper and lower cross-machine direction yarns are possible in the forming fabric according to the invention. A preferred embodiment of the invention provides that between two mutually adjacent pairs of first and second stitching threads, two lower cross machine direction yarns and one upper cross machine direction yarn are arranged. This ratio corresponds to a CD thread ratio of 1: 1.

Nach einer weiteren bevorzugten Ausführungsform der Erfindung ist vorgesehen, dass zwischen zwei zueinander benachbarten Paaren von ersten und zweiten Heftfäden zwei untere Maschinenquerrichtungsfäden und zwei obere Maschinenquerrichtungsfäden angeordnet sind. Dieses Verhältnis entspricht einem CD-Faden Verhältnis von 3:2.According to another preferred embodiment of the invention, it is provided that two lower transverse machine direction threads and two upper cross machine direction threads are arranged between two mutually adjacent pairs of first and second stitching threads. This ratio corresponds to a CD thread ratio of 3: 2.

Eine weitere Ausführungsform der Erfindung sieht vor, dass zwischen zwei zueinander benachbarten Paaren von ersten und zweiten Heftfäden ein unterer Maschinenquerrichtungsfaden und ein oberer Maschinenquerrichtungsfaden angeordnet ist. Dieses Verhältnis entspricht einem CD-Faden Verhältnis von 2:1.A further embodiment of the invention provides that a lower transverse machine direction yarn and an upper transverse machine direction yarn are arranged between two mutually adjacent pairs of first and second tacking yarns. This ratio corresponds to a CD thread ratio of 2: 1.

Um die die Zugkraft aufnehmenden unteren MD-Fäden vor Verschleiß durch Abrieb zu schützen ist es sinnvoll, wenn so viel wie möglich der unteren MD-Fäden von unteren CD-Fäden geschützt sind. Es ist deshalb besonders vorteilhaft, wenn die unteren CD-Fäden unter so viel wie möglich unteren MD-Fäden laufen. Eine bevorzugte Ausführungsform der Erfindung sieht deshalb vor, dass jeder der unteren Maschinenquerrichtungsfäden jeweils über einen und anschließend unter zumindest sieben zueinander benachbarten Maschinenrichtungsfäden läuft. Ein weiterer Vorteil der sog. langen Flotierung ist, dass der Anteil von unteren CD-Fäden innerhalb des Siebs reduziert wird, was einerseits eine geringere Dicke des Siebs möglich macht und andererseits einen geringeren Entwässerungswiderstand zur Folge haben kann.In order to protect the traction absorbing lower MD yarns from abrasion wear, it is useful to protect as much of the lower MD yarns as possible from lower CD yarns. It is therefore particularly advantageous if the lower CD threads run under as much as possible lower MD threads. A preferred embodiment of the invention therefore provides that each of the lower CMD yarns passes over one and then under at least seven machine direction yarns adjacent each other. Another advantage of the so-called long floating is that the proportion of lower CD threads within the screen is reduced, which on the one hand makes a smaller thickness of the screen possible and on the other hand can result in lower drainage resistance.

Durch die Verwendung von mehr unteren CD-Fäden bei den CD-Fadenverhältnissen 1:1 und 3:2 im Vergleich zum CD-Faden Verhältnis 2:1, werden bei diesen die Zugkraft aufnehmenden unteren MD-Fäden stärker vor Abrieb geschützt, was die Lebensdauer des Siebs stark erhöht.By using more lower CD yarns at the CD yarn ratios of 1: 1 and 3: 2 compared to the CD yarn ratio of 2: 1, these lower MD yarns receiving the tensile force are more resistant to abrasion, which increases the life of the screen increased greatly.

Eine weitere bevorzugte Ausführungsform der Erfindung sieht vor, dass zumindest zwei Paare von ersten und zweiten Heftfäden unmittelbar zueinander benachbart angeordnet sind. Allgemein wird durch Erhöhung der Bindfadenpaare die Anzahl der Anbindestellen erhöht, wodurch eine bessere Anbindung der oberen Webstruktur an die untere Webstruktur und eine höhere Steifigkeit des Formiersiebs erreicht wird.A further preferred embodiment of the invention provides that at least two pairs of first and second stitching threads are arranged directly adjacent to each other. Generally, by increasing the pairs of twine, the number of tethers is increased, thereby achieving a better bonding of the upper weave structure to the lower weave structure and a higher stiffness of the forming fabric.

Nach einer weiteren bevorzugten Ausführungsform der Erfindung ist vorgesehen, dass jedes Paar von ersten und zweiten Heftfäden zwischen zumindest zwei oberen Maschinenquerrichtungsfäden angeordnet sind.According to another preferred embodiment of the invention, it is provided that each pair of first and second stitching threads are arranged between at least two upper CMD yarns.

Es gibt unterschiedliche Möglichkeiten, wie die ersten und zweiten Heftfäden eines Heftfadenpaares in Bezug zu den unteren Maschinenquerrichtungsfäden angeordnet sein können. Eine bevorzugte Ausführungsform der Erfindung sieht vor, dass zumindest ein Paar von Heftfäden vorgesehen ist, bei dem zwischen dem ersten Heftfaden und dem zweiten Heftfaden des Paares ein unterer Maschinenquerrichtungsfaden angeordnet ist.There are various ways in which the first and second stitching yarns of a pair of stitching yarns may be disposed relative to the bottom CMD yarns. A preferred embodiment of the invention provides that at least one pair of stitching threads is provided in which a lower cross machine direction yarn is arranged between the first stitching thread and the second stitching thread of the pair.

Eine weitere bevorzugte Ausführungsform der Erfindung sieht vor, dass zumindest ein Paar von Heftfäden vorgesehen ist, bei dem der erste und zweite Heftfaden zwischen zumindest zwei unteren Maschinenquerrichtungsfäden angeordnet ist.A further preferred embodiment of the invention provides that at least one pair of stitching threads is provided in which the first and second stitching threads are arranged between at least two bottom CMD threads.

Nach einem zweiten Aspekt der Erfindung ist eine untere Anbindestelle vorgesehen, die dadurch gebildet wird, dass ein unterer Maschinenquerrichtungsfaden unter einem ersten unteren Maschinenrichtungsfaden und über einem dazu benachbarten zweiten unteren Maschinenrichtungsfaden läuft, wobei der zweite untere Maschinenrichtungsfaden unmittelbar benachbart zu einem unteren Maschinenrichtungsfaden eines ersten oder zweiten Bindungsbereichs angeordnet ist.According to a second aspect of the invention, there is provided a lower tying site formed by passing a lower cross machine direction yarn below a first lower machine direction yarn and over a second lower machine direction yarn adjacent thereto, the second lower machine direction yarn immediately adjacent a lower machine direction yarn of a first machine direction yarn second binding region is arranged.

Durch diese Anordnung wird ein erster oder zweiter Bindungsbereich eines ersten oder zweiten Heftfadens in MD-Richtung fixiert. D.h. der so fixierte Heftfaden wird in MD-Richtung vor seitlicher Bewegung geschützt.By this arrangement, a first or second binding portion of a first or second stitching thread in the MD direction is fixed. That the thus-fixed stitching thread is protected in the MD direction from lateral movement.

Eine weitere bevorzugte Ausführungsform der Erfindung sieht vor, dass der zweite untere Maschinenrichtungsfaden ein unterer Maschinenrichtungsfaden des ersten oder zweiten Bindungsbereichs ist. Durch diese Anordnung ist es weiter möglich die Anbindung der papierseitigen Webstruktur an die maschinenseitige Webstruktur zu verbessern, da dem Durchbiegen des unteren MD-Faden des Bindungsbereichs an dem die Anbindestelle angeordnet ist entgegengewirkt wird. Somit wird der maschinenseitigen Webstruktur in diesem Bereich zusätzliche Stabilität verliehen.Another preferred embodiment of the invention provides that the second lower machine direction thread is a lower machine direction thread of the first or second binding area. By this arrangement, it is further possible to improve the connection of the paper-side weaving structure to the machine-side weave structure, since the bending of the lower MD thread of the binding region at which the tying point is arranged is counteracted. Thus, the machine-side weave structure in this area is given additional stability.

Nach einer bevorzugten Ausführungsform handelt es sich um ein Formiersieb bei dem die Rapporteinheit 8 obere und 8 untere Maschinenrichtungsfäden aufweist.According to a preferred embodiment, it is a forming fabric in which the repeat unit has 8 upper and 8 lower machine direction yarns.

Nachfolgend soll die Erfindung anhand der folgenden schematischen nicht maßstäblichen Zeichnungen weiter erläutert werden. Es zeigen:

Figur 1
das Webmuster einer ersten Ausführungsform der Erfindung in CD-Richtung (CD-Verhältnis 1:1),
Figur 2
die Anordnung der Anbindestellen sowie der Bindungsbereiche auf der Maschinenseite von erfindungsgemäßen Webmustern,
Figur 3
das Webmuster einer zweiten Ausführungsform der Erfindung in CD-Richtung (CD-Verhältnis 3:2).
The invention will be further explained with reference to the following schematic non-scale drawings. Show it:
FIG. 1
the weave pattern of a first embodiment of the invention in the CD direction (CD ratio 1: 1),
FIG. 2
the arrangement of the binding sites and the binding regions on the machine side of web patterns according to the invention,
FIG. 3
the weave pattern of a second embodiment of the invention in the CD direction (CD ratio 3: 2).

Die Figur 1 zeigt eine Rapporteinheit des Webmusters eines erfindungsgemäßen Formiersiebs.The FIG. 1 shows a repeat unit of the weaving pattern of a forming fabric according to the invention.

Das Formiersieb weist eine Vielzahl von oberen MD-Fäden 1,3,5,7,9,11,13,15, eine Vielzahl von unteren MD-Fäden 2,4,6,8,10,12,14,16, eine Vielzahl von oberen CD-Fäden T1,T2,T3,T4, eine Vielzahl von unteren CD-Fäden B1,B2,B3,...,B8 sowie Paare von ersten und zweiten Heftfäden I1 und I2, I3 und I4, I5 und I6, I7 und I8 auf.The forming fabric comprises a plurality of upper MD yarns 1,3,5,7,9,11,13,15, a plurality of lower MD yarns 2,4,6,8,10,12,14,16, a Plurality of upper CD threads T1, T2, T3, T4, a plurality of lower CD threads B1, B2, B3, ..., B8, and pairs of first and second stitching threads I1 and I2, I3 and I4, I5 and I6 , I7 and I8.

Im vorliegenden Ausführungsbeispiel weist die Rapporteinheit 8 obere und 8 untere Maschinenrichtungsfäden auf.In the present embodiment, the repeat unit 8 has upper and 8 lower machine direction threads.

Die Rapporteinheit wird durch die unteren und oberen MD-Fäden 1 bis 16, die oberen CD-Fäden T1,T2,T3,T4, die unteren CD-Fäden B1 bis B8 und durch die Paare von ersten und zweiten Heftfäden I1 und I2, I3 und I4, I5 und I6, I7 und I8 gebildet. Die Rapporteinheit wird also durch 16 MD- bzw. Kettfäden gebildet.The repeat unit is constituted by the lower and upper MD threads 1 to 16, the upper CD threads T1, T2, T3, T4, the lower CD threads B1 to B8, and the pairs of first and second stitching threads I1 and I2, I3 and I4, I5 and I6, I7 and I8. The repeat unit is thus formed by 16 MD or warp threads.

Die papierseitige Webstruktur wird dadurch gebildet, in dem die oberen MD-Fäden 1,3,5,7,9,11,13,15 mit den oberen CD-Fäden T1,T2,T3,T4 verwoben sind und in dem die oberen MD-Fäden 1,3,5,7,9,11,13,15 mit den ersten und zweiten Heftfäden I1 und I2, I3 und I4, I5 und I6, I7 und I8 eines Paares jeweils derart verwoben sind, dass dadurch das von den oberen MD-Fäden 1,3,5,7,9,11,13,15 und den oberen CD-Fäden T1,T2,T3,T4 gebildete Webstruktur fortgesetzt wird.The paper-side weave structure is formed by interweaving the upper MD yarns 1,3,5,7,9,11,13,15 with the upper CD yarns T1, T2, T3, T4 and in which the upper MD Yarns 1, 3, 5, 7, 9, 11, 13, 15 are respectively interwoven with the first and second stitching yarns I1 and I2, I3 and I4, I5 and I6, I7 and I8 of a pair so as to produce that of upper MD threads 1,3,5,7,9,11,13,15 and the upper CD threads T1, T2, T3, T4 formed web structure is continued.

So läuft bspw. der obere CD-Faden T1 über die oberen MD-Fäden 1,5,9,13 usw. und unter den oberen MD-Fäden 3,7,11,15.For example, the upper CD thread T1 passes over the upper MD threads 1,5,9,13, etc. and below the upper MD threads 3,7,11,15.

Der Heftfaden I1 läuft in der Rapporteinheit über die oberen MD-Fäden 3,7 und unter dem oberen MD-Faden 5.The stitching thread I1 runs in the repeat unit over the upper MD threads 3, 7 and under the upper MD thread 5.

Der Heftfaden 12 läuft in der Rapporteinheit über die oberen MD-Fäden 11,15 und unter dem oberen MD-Faden 13.The stitching thread 12 runs in the repeat unit over the upper MD threads 11,15 and under the upper MD thread 13th

Hierbei bildet das Weben des Heftfadens 11 mit den oberen MD-Fäden 3,5,7 ein erstes Segment A. Des weiteren bildet das Weben des Heftfadens 12 mit den oberen MD-Fäden 11,13,15 ein zweites Segment B.Here, the weaving of the stitching thread 11 with the upper MD threads 3,5,7 forms a first segment A. Furthermore, the weaving of the stitching thread 12 with the upper MD threads 11,13,15 forms a second segment B.

Die ersten und die zweiten Segmente sind in CD-Richtung abwechselnd hintereinander, d.h. in der Reihenfolge A,B angeordnet., wobei durch diese Reihenfolge die von den oberen MD-Fäden1,3,5,7,9,11,13,15 und dem oberen CD-Faden T1 gebildete Webstruktur fortgesetzt wird.The first and second segments are alternately successively in the CD direction, i. in this order, the weave structure formed by the upper MD yarns 1,3,3,7,11,13,15 and the upper CD yarn T1 is continued.

Die papierseitige Webstruktur ist ein Leinwandbindungsmuster.The paper-side weave structure is a plain weave pattern.

Die maschinenseitige Webstruktur wird dadurch gebildet, in dem die unteren MD-Fäden 2,4,6,8,10,12,14,16 mit den unteren CD-Fäden B1,B2,B3,....B8 verwoben sind.The machine-side weave structure is formed by the lower MD threads 2,4,6,8,10,12,14,16 are interwoven with the lower CD threads B1, B2, B3, .... B8.

Es läuft der untere CD-Faden B1 über den unteren MD-Faden 2 und anschließend unter den sieben zueinander benachbarten MD-Fäden 4,6,8,10,12,14 und 16. Der Verlauf des CD-Fadens B1 über den MD-Faden 2 definiert eine untere Anbindestelle I. Auf die unteren Anbindestellen soll später weiter eingegangen werden.The lower CD thread B1 runs over the lower MD thread 2 and then under the seven mutually adjacent MD threads 4, 6, 8, 10, 12, 14 and 16. The course of the CD thread B1 over the MD Thread 2 defines a lower attachment point I. The lower attachment points will be discussed later.

Hierbei bildet die maschinenseitige Webstruktur ein 8 shaft "Atlas Webmuster".Here, the machine-side weave structure forms an 8 shaft "Atlas weave pattern".

Die papierseitige und die maschinenseitige Webstruktur sind miteinander verbunden, in dem die unteren MD-Fäden 2,4,6,8,10,12,14,16 mit den ersten und zweiten Heftfäden 11 und I2, I3 und I4, I5 und I6, I7 und I8 eines jeden Paares verwoben sind.The paper-side and the machine-side weave structures are connected to each other, in which the lower MD threads 2,4,6,8,10,12,14,16 with the first and second stitching threads 11 and I2, I3 and I4, I5 and I6, I7 and I8 of each pair are interwoven.

Der Heftfaden 11 läuft in jeder Rapporteinheit unter den unteren MD-Fäden 12 und 14.The stitching thread 11 runs under the lower MD threads 12 and 14 in each repeat unit.

Der Heftfaden 21 läuft in jeder Rapporteinheit unter den unteren MD-Fäden 4 und 6.The stitching thread 21 runs under the lower MD threads 4 and 6 in each repeat unit.

Hierbei bildet das Weben des Heftfadens 11 mit den unteren MD-Fäden 12 und 14 einen ersten Bindungsbereich OO. Des weiteren bildet das Weben des Heftfadens 12 mit den unteren MD-Fäden 4 und 6 einen zweiten Bindungsbereich XX.Here, the weaving of the stitching thread 11 with the lower MD threads 12 and 14 forms a first binding region OO. Furthermore, the weaving of the stitching thread 12 with the lower MD threads 4 and 6 forms a second binding region XX.

Somit wird jeder erste Bindungsbereich OO und jeder zweite Bindungsbereich XX dadurch gebildet wird, in dem der erste Heftfaden I1 und der zweite Heftfaden 12 jeweils unter zwei zueinander benachbarten unteren Maschinenrichtungsfäden läuft.Thus, each first binding region OO and each second binding region XX is formed by passing the first stitching thread I1 and the second stitching thread 12 respectively under two lower machine direction threads adjacent to each other.

Die ersten und die zweiten Bindungsbereiche sind in CD-Richtung abwechselnd hintereinander, d.h. in der Reihenfolge XX,OO angeordnet.The first and second binding regions are alternately successively in the CD direction, i. arranged in the order XX, OO.

Zwischen dem ersten Bindungsbereich XX (gebildet mit 4,6) und dem zweiten Bindungsbereich OO (gebildet mit 12,14) sind die beiden unteren MD-Fäden 8 und 10 angeordnet.Between the first binding region XX (formed with 4,6) and the second binding region OO (formed with 12,14), the two lower MD threads 8 and 10 are arranged.

Zwischen dem ersten Segment A (gebildet mit 3,5,7) und dem ersten Bindungsbereich OO (gebildet mit 12,14) ist ein erster Übergangsbereich angeordnet, in dem der erste Heftfaden I1 zwischen dem Paar von oberen und unteren Maschinenrichtungsfäden 9 und 10 verläuft.Between the first segment A (formed at 3,5,7) and the first binding portion OO (formed at 12,14) is disposed a first transition region in which the first stitching yarn I1 extends between the pair of upper and lower machine direction yarns 9 and 10 ,

Zwischen dem zweiten Segment B (gebildet mit 11,13,15) und dem zweiten Bindungsbereich XX (gebildet mit 4,6) ist ein zweiter Übergangsbereich, in dem der zweite Heftfaden 12 zwischen den zueinander benachbarten Paaren von oberen und unteren Maschinenrichtungsfäden 7 und 8 sowie 9 und 10 verläuft.Between the second segment B (formed with 11,13,15) and the second binding region XX (formed with 4,6) is a second transition region in which the second stitching thread 12 between the mutually adjacent pairs of upper and lower machine direction threads 7 and 8 as well as 9 and 10 runs.

Das erfindungsgemäße Formiersieb der Figur 1 weist ein CD-Faden Verhältnis von 1:1 auf. Demzufolge sind immer zwischen zwei zueinander benachbarten Paaren von ersten und zweiten Heftfäden zwei untere Maschinenquerrichtungsfäden und ein oberer Maschinenquerrichtungsfaden angeordnet. So sind bspw. zwischen den Heftfadenpaaren 11, 12 und 13, 14 die unteren CD-Fäden B2 und B3 sowie der obere CD-Faden T2 angeordnet. Da jeweils ein Heftfadenpaar das Webmuster eines oberen CD-Fadens fortsetzt ergibt sich somit ein CD-Faden Verhältnis von 1:1.The forming fabric of the invention FIG. 1 has a CD thread ratio of 1: 1. As a result, two lower cross machine direction yarns and one upper cross machine direction yarn are always interposed between two mutually adjacent pairs of first and second stitching yarns. Thus, for example, between the stitching thread pairs 11, 12 and 13, 14, the lower CD threads B2 and B3 and the upper CD thread T2 are arranged. Since each pair of stitching threads continues the weave pattern of an upper CD thread, this results in a CD thread ratio of 1: 1.

Wie aus der Figur 1 ersichtlich ist, ist bspw. das Paar von Heftfäden I1 und I2 zwischen den zwei oberen Maschinenquerrichtungsfäden T 1 und T2 angeordnet. Des weiteren ist das Paar von Heftfäden I1 und I2 zwischen den zwei unteren Maschinenquerrichtungsfäden B1 und B2 angeordnet.Like from the FIG. 1 can be seen, for example, the pair of stitching threads I1 and I2 between the two upper cross-machine direction yarns T 1 and T2 is arranged. Further, the pair of stitching yarns I1 and I2 are arranged between the two lower cross-machine direction yarns B1 and B2.

Wie bereits erläutert wird durch den Verlauf des unteren CD-Faden B1 über den MD-Faden 2 die untere Anbindestellen I festgelegt. Des weiteren werden durch den Verlauf des unteren CD-Faden B2 über den MD-Faden 8 die untere Anbindestellen K festgelegt.As already explained, the lower attachment point I is determined by the course of the lower CD thread B1 over the MD thread 2. Furthermore, the lower attachment points K are determined by the course of the lower CD thread B2 over the MD thread 8.

Eine untere Anbindestelle wird ganz allgemein dadurch definiert, dass ein unterer Maschinenquerrichtungsfaden unter einem ersten unteren Maschinenrichtungsfaden und über einem dazu benachbarten zweiten unteren Maschinenrichtungsfaden läuft. D.h. in diesem Bsp. werden bspw. die ersten unteren MD-Fäden durch die MD-Fäden 4,16 (für B1) und 6,10 (für B2) gebildet, wobei die zweiten unteren MD-Fäden durch den unteren MD-Faden 2 (für B1) und 8 (für B2) gebildet werden.A bottom tie is generally defined by passing a bottom cross machine direction yarn under a first bottom machine direction yarn and over a second machine direction lower yarn adjacent thereto. That In this example, for example, the first lower MD threads are formed by the MD threads 4, 16 (for B1) and 6, 10 (for B2), the second lower MD threads being formed by the lower MD thread 2 (FIG. for B1) and 8 (for B2).

Wie in der Figur 1 zu erkennen ist, ist bspw. der untere MD-Faden 2 unmittelbar benachbart zu dem unteren MD-Faden 4 des zweiten Bindungsbereichs XX angeordnet.Like in the FIG. 1 can be seen, for example, the lower MD thread 2 is arranged immediately adjacent to the lower MD thread 4 of the second binding region XX.

Die oben beschriebenen Prinzipien können auf die gesamte Rapporteinheit ausgedehnt werden. Daher wird auf eine weitere Beschreibung des Webens der übrigen Maschinenrichtungsfäden, Maschinenquerrichtungsfäden und Heftfadenpaare verzichtet.The principles described above can be extended to the entire repeat unit. Therefore, a further description of the weaving of the remaining machine direction yarns, cross machine direction yarns, and stitching yarn pairs will be omitted.

Die Figur 2 zeigt für zweit Rapporteinheiten die Anordnung der Anbindestellen sowie der Bindungsbereiche des Webmusters der Maschinenseite der Ausführungsform der Figur 1. Jedes Feld stellt hierbei den Bereich dar, in dem die unteren MD-Fäden 2,4,6,8,,10,...32 (1 bis 16 erste Rapporteinheit und 17 bis 32 zweite Rapporteinheit) mit den unteren CD-Fäden B1,B2,B3,...B8 bzw. den ersten Heftfäden I1,I3,I5,.. und den zweiten Heftfäden I2, I4, I6,... verwoben sind.The FIG. 2 shows for second repeat units, the arrangement of the binding sites and the binding areas of the weave pattern of the machine side of the embodiment of FIG. 1 , Each field represents the area in which the lower MD threads 2, 4, 6, 8, 10,... 32 (1 to 16 first repeat unit and 17 to 32 second repeat unit) are connected to the lower CD threads B1 , B2, B3, ... B8 and the first stitching threads I1, I3, I5, .. and the second stitching threads I2, I4, I6, ... are interwoven.

Ganz allgemein stellen mit XX bezeichneten Stellen zweite Bindungsbereiche und die mit OO bezeichneten Stellen erste Bindungsbereiche dar, von denen einige entsprechend der Figur 1 gekennzeichnet sind. Die mit ■ bezeichneten Stellen zeigen untere Anbindungspunkte.More generally, locations designated XX represent second bond areas and the locations labeled OO are first bond areas, some of which correspond to the FIG. 1 Marked are. The places marked with ■ indicate lower connection points.

Die Figur 2a zeigt die Anordnung der Anbindestellen sowie der Bindungsbereiche des Webmusters der Maschinenseite für den Fall bei dem die ersten und zweiten Heftfäden der Paare von Heftfäden zwischen zwei unteren Maschinenquerrichtungsfäden angeordnet sind.The FIG. 2a Fig. 12 shows the arrangement of the binding sites as well as the bonding regions of the weave pattern of the machine side in the case where the first and second stitching yarns of the pairs of stitching yarns are interposed between two lower cross-machine direction yarns.

So sind bspw. die Heftfäden I1 und I2 zwischen den unteren CD-Fäden B1 und B2 angeordnet. Des weiteren sind die Heftfäden 13 und 14 zwischen den unteren CD-Fäden B3 und B4 angeordnet.Thus, for example, the stitching threads I1 and I2 are arranged between the lower CD threads B1 and B2. Furthermore, the stitching threads 13 and 14 are arranged between the lower CD threads B3 and B4.

Die Figur 2b zeigt die Anordnung der Anbindestellen sowie der Bindungsbereiche des Webmusters der Maschinenseite für den Fall bei dem zwischen den ersten und den zweiten Heftfäden der Paare von Heftfäden jeweils ein unterer CD-Faden angeordnet ist.The FIG. 2b shows the arrangement of the binding sites as well as the binding areas of the weave pattern of the machine side for the case in which between the first and the second stitching threads of the pairs of stitching threads respectively a lower CD thread is arranged.

So sind bspw. zwischen dem Heftfaden I1 die beiden unteren CD-Fäden B1 und B2 angeordnet. Des weiteren sind bspw. zwischen dem Heftfaden 12 die beiden unteren CD-Fäden B2 und B3 angeordnet.Thus, for example, between the stitching thread I1, the two lower CD threads B1 and B2 are arranged. Furthermore, for example, between the stitching thread 12, the two lower CD threads B2 and B3 are arranged.

Im Unterschied zur Figur 1 zeigt die Figur 3 zwei Rapporteinheiten des Webmuster einer zweiten Ausführungsform der Erfindung in CD-Richtung mit einem DC-Faden Verhältnis von 3:2.In contrast to FIG. 1 show the FIG. 3 two repeat units of the weave pattern of a second embodiment of the invention in CD direction with a DC thread ratio of 3: 2.

Demzufolge sind immer zwischen zwei zueinander benachbarten Paaren von ersten und zweiten Heftfäden zwei untere CD-Fäden und zwei obere CD-Fäden angeordnet. So sind bspw. zwischen den Heftfadenpaaren I1, I2 und I3, I4 die unteren CD-Fäden B3 und B4 sowie die oberen CD-Fäden T3 und T4 angeordnet. Da jeweils ein Heftfadenpaar das Webmuster eines oberen CD-Fadens fortsetzt, ergibt sich somit ein CD-Faden Verhältnis von 3:2.Consequently, two lower CD threads and two upper CD threads are always arranged between two mutually adjacent pairs of first and second stitching threads. Thus, for example, between the stitching thread pairs I1, I2 and I3, I4, the lower CD threads B3 and B4 and the upper CD threads T3 and T4 are arranged. Since a pair of stitching yarns continues the weave pattern of an upper CD thread, this results in a CD thread ratio of 3: 2.

Bezugszeichenliste:LIST OF REFERENCE NUMBERS

1,3,5,7,...,151,3,5,7, ..., 15
oberer MD-Fadenupper MD thread
2,4,6,8,...,162,4,6,8, ..., 16
unterer MD-Fadenlower MD thread
T1,T2,T3,...T1, T2, T3, ...
oberer CD-Fadenupper CD thread
B1,B2,B3,...B1, B2, B3, ...
unterer CD-Fadenlower CD thread
AA
erstes Segmentfirst segment
BB
zweites Segmentsecond segment
OOOO
erster Bindungsbereichfirst binding area
XXXX
zweiter Bindungsbereichsecond binding area
I,KI, K
Anbindestelleisolation location

Claims (20)

  1. Forming fabric with upper machine direction threads (1, 3, 5, 7,..., 15), upper cross-machine direction threads (T1, T2, T3,...), lower machine direction threads (2, 4, 6, 8,..., 16), lower cross-machine direction threads (B1, B2, B3,...) and pairs of first and second binding threads (I1 and I2, I3 and I4,...),
    - a paper-side woven structure being formed in which the upper machine direction threads (1, 3, 5, 7,..., 15) are woven with the upper cross-machine direction threads (T1, T2, T3,...) and in which the upper machine direction threads (1, 3, 5, 7,...,31) are woven with first binding threads (I1, I3, I5,...) and with second binding threads (I2, I4, I6,...) of a pair (I1 and I2, I3 and I4,...), in each case in such a way that, as a result, the woven structure formed by the upper machine direction threads (1, 3, 5, 7,..., 15) and the upper cross-machine direction threads (T1, T2, T3,...) is continued,
    - a machine-side woven structure being formed in which the lower machine direction threads (2, 4, 8,..., 16) are woven with the lower cross-machine direction threads (B1, B2, B3,...), and
    - the paper-side and the machine-side woven structures being connected to each other, in that the first binding thread (I1, I3, I5,...) of each pair (I1 and I2, I3 and I4,...) is woven with lower machine direction threads (2, 4, 6, 8,..., 16) and forms first binding regions (OO), and in that the second binding thread (I2, I4, I6,...) of each pair (I1 and I2, I3 and I4,...) is woven with lower machine direction threads (2, 4, 6, 8,..., 16) and forms second binding regions (XX), and the first (OO) and second binding regions (XX) being arranged alternately one after another in the cross-machine direction,
    characterized in that at least a first (OO) and/or a second (XX) binding region is formed by the first binding thread (I1, I3, I5,...) and/or the second binding thread (I2, I4, I6,...) in each case running under at least two and at most three mutually adjacent lower machine direction threads (2, 4, 6, 8,..., 16).
  2. Forming fabric according to Claim 1,
    characterized in that
    a lower binding point (I, K) is provided which is formed by a lower cross-machine direction thread (B1, B2, B3,...) running under a first lower machine direction thread (2, 4, 6, 8,..., 16) and over a second lower machine direction thread (2, 4, 6, 8,..., 16) adjacent thereto, the second lower machine direction thread (2, 4, 6, 8,..., 16) being arranged immediately adjacent to a lower machine direction thread (2,4,6,8..., 16) of a first (OO) or second (XX) binding region.
  3. Forming fabric according to Claim 1 or 2, characterized in that, in each first (OO) and/or in each second (XX) binding region, the first binding thread (I1, I3, I5,...) and, respectively, the second binding thread (I2, I4, I6,...) run over at least two and at most three mutually adjacent lower machine directions threads (2, 4,6,8,..., 16).
  4. Forming fabric according to Claim 3, characterized in that the second lower machine direction thread (2, 4, 6, 8,..., 16) is a lower machine direction thread (2, 4, 6, 8,..., 16) of the first (OO) or second (XX) binding region.
  5. Forming fabric according to one of the preceding claims, characterized in that a maximum of three lower machine direction threads (2, 4, 6, 8,..., 16) is arranged between a first binding region (OO) and a second binding region (XX).
  6. Forming fabric according to one of the preceding claims, characterized in that the first binding thread (I1, I3, I5,...) of a pair forms first segments (A) with upper machine direction threads (1, 3, 5, 7,..., 15), and the second binding thread (I2, I4, I6,...) of the pair forms second segments (B) with upper machine direction threads (1, 3, 5, 7,..., 31), the first (A) and second (B) segments being arranged alternately one after another in the cross-machine direction, and each first (A) and each second (B) segment in each case being formed with at least two and at most five mutually adjacent upper machine direction threads (1, 3, 5, 7,..., 15).
  7. Forming fabric according to one of the preceding claims, characterized in that, between each first segment (A) and first binding region (OO) and, respectively, between each second segment (B) and second binding region (XX) there is in each case a first and second transition region, in which the first binding thread (I1, I3, I5,...) and second binding thread (I2, I4, I6,...) run between mutually adjacent pairs (9 and 10, 15 and 16) of upper and lower machine direction threads, each first and each second transition region in each case being formed with a maximum of three mutually adjacent pairs (9 and 10, 15 and 16).
  8. Forming fabric according to one of the preceding claims, characterized in that the first (A) and the second (B) segments are formed in that the first binding thread (I1, I3, I5,...) per repetition unit of the woven structure in the cross-machine direction runs over and under the same number of upper machine direction threads (1, 3, 5, 7,..., 15) as the second binding thread (I2, I4, I6,...).
  9. Forming fabric according to one of the preceding claims, characterized in that, for each repetition unit of the woven structure in the cross-machine direction, the first binding threads (I1, I3, I5,...) and the second binding threads (I2, I4, I6,...) of each pair (I1 and I2, I3 and I4,...) run the same way under, over and between the upper (1, 3, 5, 7,..., 15) and lower machine direction threads (2, 4, 6, 8,..., 16).
  10. Forming fabric according to one of the preceding claims, characterized in that the paper-side web structure is a basket-weave pattern.
  11. Forming fabric according to one of the preceding claims, characterized in that the first (A) and the second (B) segments are in each case formed with three mutually adjacent upper machine direction threads (1, 3, 5, 7,..., 15), the first and the second transition regions are in each case formed with a maximum of two mutually adjacent pairs (9 and 10, 15 and 16) of upper and lower machine direction threads, and the first (OO) and the second (XX) binding regions are in each case formed with two mutually adjacent lower machine direction threads (2, 4, 6, 8,..., 32).
  12. Forming fabric according to one of the preceding claims, characterized in that, between two mutually adjacent pairs (I1 and I2, I3 and I4,...) of first binding threads (I1, I3, I5,...) and second binding threads (I2, I4, I6,..), there are arranged two lower cross-machine direction threads (B1, B2, B3,...) and one upper cross-machine direction thread (T1, T2, T3,...).
  13. Forming fabric according to one of Claims 1 to 12, characterized in that, between two mutually adjacent pairs (I1 and I2, I3 and I4,...) of first and second binding threads, there are arranged two lower cross-machine direction threads (B1, B2, B3,..) and two upper cross-machine direction threads (T1, T2, T3,...).
  14. Forming fabric according to one of Claims 1 to 12, characterized in that, between two mutually adjacent pairs (I1 and I2, I3 and I4,...) of first and second binding threads, there are arranged one lower cross-machine direction thread (B1, B2, B3,..) and one upper cross-machine direction thread (T1, T2, T3,...).
  15. Forming fabric according to one of Claims 1 to 12, characterized in that at least two pairs (I1 and I2, I3 and I4,...) of first and second binding threads are arranged immediately adjacent to one other.
  16. Forming fabric according to one of the preceding claims, characterized in that each of the lower cross-machine direction threads (B1, B2, B3,...) in each case runs over one and then under at least seven mutually adjacent lower machine direction threads (2, 4, 6, 8,..., 16).
  17. Forming fabric according to one of the preceding claims, characterized in that each pair (I1 and I2, I3 and I4,...) of first and second binding threads is arranged between at least two upper cross-machine direction threads (T1, T2, T3,...).
  18. Forming fabric according to one of the preceding claims, characterized in that at least one pair (I1 and I2, I3 and I4,...) of binding threads is provided, in which at least one lower cross-machine direction thread (B1, B2, B3,...) is arranged between the first binding thread (I1, I3, I5,...) and the second binding thread (I2, I4, I6,...) of the pair (I1 and I2, I3 and I4,...).
  19. Forming fabric according to one of Claims 1 to 18, characterized in that at least one pair (I1 and I2, I3 and I4,...) of binding threads is provided, in which the first binding thread (I1, I3, I5,...) and the second binding thread (I2, I4, I6,...) are arranged between at least two lower cross-machine direction threads (B1, B2, B3,...).
  20. Forming fabric according to one of the preceding claims, characterized in that the repeat unit has 8 upper (1, 3, 5, 7,..., 15) and 8 lower (2, 4, 6, 8,..., 16) machine direction threads.
EP05102771A 2004-04-16 2005-04-08 Forming fabric Active EP1586696B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2314762A1 (en) 2009-10-23 2011-04-27 Heimbach GmbH & Co.KG Woven paper maker fabric

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JP5749795B2 (en) * 2011-04-11 2015-07-15 日本フイルコン株式会社 Multilayer fabric for nonwoven fabric

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US5437315A (en) * 1994-03-09 1995-08-01 Huyck Licensco, Inc. Multilayer forming fabric
US5967195A (en) * 1997-08-01 1999-10-19 Weavexx Corporation Multi-layer forming fabric with stitching yarn pairs integrated into papermaking surface
GB0317248D0 (en) * 2003-07-24 2003-08-27 Voith Fabrics Gmbh & Co Kg Fabric

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2314762A1 (en) 2009-10-23 2011-04-27 Heimbach GmbH & Co.KG Woven paper maker fabric

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ATE415515T1 (en) 2008-12-15

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