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EP0048962B2 - Two-layered sieve for the sheet forming zone of a paper machine - Google Patents

Two-layered sieve for the sheet forming zone of a paper machine Download PDF

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Publication number
EP0048962B2
EP0048962B2 EP81107606A EP81107606A EP0048962B2 EP 0048962 B2 EP0048962 B2 EP 0048962B2 EP 81107606 A EP81107606 A EP 81107606A EP 81107606 A EP81107606 A EP 81107606A EP 0048962 B2 EP0048962 B2 EP 0048962B2
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EP
European Patent Office
Prior art keywords
warp
wires
fabric
weft
sieve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP81107606A
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German (de)
French (fr)
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EP0048962A2 (en
EP0048962A3 (en
EP0048962B1 (en
Inventor
Georg Borel
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Herman Wangner GmbH and Co KG
Original Assignee
Herman Wangner GmbH and Co KG
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Application filed by Herman Wangner GmbH and Co KG filed Critical Herman Wangner GmbH and Co KG
Priority to AT81107606T priority Critical patent/ATE6877T1/en
Publication of EP0048962A2 publication Critical patent/EP0048962A2/en
Publication of EP0048962A3 publication Critical patent/EP0048962A3/en
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Publication of EP0048962B1 publication Critical patent/EP0048962B1/en
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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/0027—Screen-cloths
    • D21F1/0036—Multi-layer screen-cloths
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S162/00—Paper making and fiber liberation
    • Y10S162/90—Papermaking press felts

Definitions

  • the invention relates to a double-layer sieve for the sheet-forming part of a paper machine, which consists of weft threads arranged in pairs one above the other and running transversely to the machine direction and warp threads running in the machine direction, all the warp threads being integrated in the upper layer of the sieve and the weft threads and warp threads being made of plastic monofilament .
  • Such screens are known from DE-OS Nos. 2263476 and 2540490. With these screens, all warp wires bind under the weft wires on the running side and are therefore exposed to abrasion. Since double-layer sieves tear open immediately when grinding through the warp wires - the warp wires transmit the entire driving force that acts on the sieve - the wear of the warp wires is the usual cause of the failure of a sieve. This is especially true for the sieves according to DE-OS No. 2263476, in which the warp wires are looped through long before the weft wires on the running side are used up. According to DE-OS No.
  • this difficulty is partially solved in that the warp wires run only under one weft wire on the running side.
  • the warp bows on the barrel side become significantly shorter, the weft bows become longer and, as a result, the warping of the weft wires can be increased to such an extent that the warp wires on the barrel side are, as it were, embedded within the weft wires.
  • Sufficiently strong fixing means that the weft wires can be looped through in front of the warp wires.
  • weft wires may only be a few hundredths of a millimeter thicker than the warp wires, since otherwise the warp wires are pressed downwards by the stronger and stiffer weft wires and are therefore more exposed to abrasion. It is therefore not possible with such a sieve to use thicker weft wires to increase the abrasion volume.
  • a paper machine screen is constructed from two self-contained fabric webs which are connected by a special binding chain.
  • the binding chain runs partially on the barrel side under the weft wires and is therefore exposed to grinding. The thinner the binding chain, the more it is looped through.
  • Such a sieve made up of two self-contained fabric webs is very expensive and complex.
  • the invention has for its object to provide a double-layer, intended for the sheet forming part of a paper machine, which has a longer running time with low screen marking in the paper and high stability in the transverse and longitudinal directions.
  • the running time is additionally extended by the larger abrasion volume of the lower weft threads.
  • the embodiment of the invention specified in claim 4 doubles the cranking effect of the warp threads, i.e. the weft thread is bent more and the warp threads are better protected against abrasion.
  • the sieve according to the invention is easiest to manufacture if the number of warps on the paper side is twice as high as on the running side, since then every second warp wire is not woven into the lower layer. However, it is also possible to weave only every third, fourth, etc. warp wire into the lower layer, so that the ratio of the warp numbers in the upper or lower layer is 3: 1.4: 1 1, etc.
  • the warp number of the upper layer used to form the paper web is preferably at least twice as high as that of the lower layer.
  • the screen according to the invention has all the advantages of a double-layer screen.
  • weaving requires a smaller number of pinch rollers after weaving one Siebes happens the switch to any conventional bindings without any move in the harness system.
  • the sewing of the flat-woven sieves is also done with conventional equipment and is significantly easier than with sieves made up of several individual fabric layers, in which each individual fabric layer has to be sewn separately.
  • the length of the weft floatation on the barrel side can be shortened if necessary without changing the screen structure of the paper side by looping the warp wires that are integrated in the lower layer not just once per repeat, but twice or more times, or under two Shots of the lower layer are performed.
  • the free weft float can be shortened from 9 to 7 warp wires without the advantages of this new type of fabric according to the invention being nullified or impaired, because at least half of the warp wires remain hidden inside the screen until the end of the runtime in full strength, since they do Are not exposed to abrasion.
  • the warp wires and the weft wires are formed by a plastic monofilament; polyester and polyamide monofilaments are particularly suitable. Because of the difficulty of round weaving double-layered sieves, the sieves are woven flat.
  • Another advantage of the screen according to the invention is that, because of the higher number of warps in the upper layer, the paper side of the screen has a finer structure and leaves a weaker mark in the paper.
  • the power transmission chain can be thinner than the construction chain or can be made of less stretchable material than the construction chain. In particular, more elastic material can be used for the construction chain than is usually used for warp wires in a paper machine wire.
  • the screen shown in FIGS. 1 to 3 is woven flat, that is, the warp threads run in the machine direction and the weft threads crosswise to the machine direction.
  • the sieve contains two layers of weft wires, namely the upper weft wires 3, which form the paper side of the sieve, and the lower weft wires 4, which form the running side of the sieve.
  • An upper weft wire 3 is arranged above a lower weft wire 4, i.e. the weft wires are available in pairs.
  • the screen contains at least two types of warp wires, namely a so-called construction chain 1, which is integrated in the upper layer 5 and the lower layer 6, and a so-called power transmission chain 2, which is only integrated in the upper layer 5.
  • the sieve according to the invention can have any type of weave, ie twill weave, satin weave or a derived weave.
  • the screen preferably has satin weave, ie the weave points do not touch each other and are evenly distributed.
  • the number of warps on the paper side of the wire is significantly higher than on the running side, since part of the warp wires, namely the power transmission chain 2, is not integrated in the lower layer.
  • the power transmission chain 2 is therefore not ground during operation and does not suffer any abrasion.
  • This power transmission chain 2 can still use the fabric tension Pick up when the warp and weft wires on the running side (lower layer 6) of the sieve have already been completely ground off.
  • the power transmission chain 2 should also run as far as possible inside the screen in order to obtain a screen that is as free of markings as possible and to achieve a good web acceptance.
  • the power transmission chain 2 should have as few bends as possible, ie have a straight course, in order to give the screen a high degree of longitudinal stability and a small constructional stretch.
  • FIG. 4 and 5 show the fabric image of the paper side or the running side of a screen according to the invention.
  • the top view of FIG. 4 shows a 5-shaft atlas and that of FIG. 5 shows a 10-shaft atlas.
  • the binding points 7 correspond to the cranks of the construction chain 1 and the power transmission chain 2, while in FIG. 5 the binding points 8 only originate from the construction chain 1.
  • FIG. 6 shows a variant of the embodiment according to the invention.
  • the construction chain 1 runs on the running side under two weft wires (FIG. 6).
  • the force transmission chain 2 runs predominantly inside the sieve and only binds the weft wires 3 of the upper layer 5.
  • the necessary tensile strength of the fabric is retained after the lower layer of the sieve has been destroyed.
  • the course of the power transmission chain 2 is the same for both bindings, so Figures 2 and 7 are identical.
  • FIGS. 4 and 9 The structure of the top layer of both screen designs is also the same, therefore the fabric image in FIGS. 4 and 9 is identical. Only the lower layer of the screen (FIG. 10) shows an extension of the warp crooks 8 and a shortening of the crooks 9 of the weft wires. In the cranking 8 on the running side, the two warp wires 1 are always in pairs, which doubles the cranking effect of these warp wires.
  • a weave with at least 10 shafts and an atlas distribution was shown. Controlling the length of the weft floats in the lower layer is particularly important for fabrics with a higher weave repeat, so that the length of the weft bend on the barrel side can be adapted to the requirements of the particular case.
  • the lower fabric layer 6 is woven with substantially thicker weft wires, namely with a diameter of 0.27 mm polyester monofilament, with the possibility of alternately weaving polyester and polyamide monofilaments into this layer to further increase the abrasion resistance.
  • the alternation can be 1: 1, in extreme cases 2: 1, in which case two polyamide wires and one polyester wire are woven.

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  • Woven Fabrics (AREA)
  • Paper (AREA)

Description

Die Erfindung betrifft ein doppellagiges Sieb für den Blattbildungsteil einer Papiermaschine, das aus paarweise übereinander angeordneten und quer zur Maschinenrichtung verlaufenden Schußfäden und aus in Maschinenrichtung verlaufenden Kettfäden besteht, wobei alle Kettfäden in die obere Lage des Siebes eingebunden sind und die Schußfäden und Kettfäden aus Kunststoffmonofil bestehen.The invention relates to a double-layer sieve for the sheet-forming part of a paper machine, which consists of weft threads arranged in pairs one above the other and running transversely to the machine direction and warp threads running in the machine direction, all the warp threads being integrated in the upper layer of the sieve and the weft threads and warp threads being made of plastic monofilament .

Derartige Siebe sind aus den DE-OS Nrn. 2263476 und 2540490 bekannt. Bei diesen Sieben binden alle Kettdrähte auf der Laufseite unter den Schussdrahten und sind damit dem Abrieb ausgesetzt. Da doppellagige Siebe sofort beim Durchschliff der Kettdrähte aufreissen -- die Kettdrähte übertragen nämlich die gesamte Antriebskraft, die auf das Sieb wirkt --, ist der Abrieb der Kettdrähte die übliche Ursache für den Ausfall eines Siebes. Dies trifft vor allem für die Siebe nach der DE-OS Nr, 2263476 zu bei denen die Kettdrähte durchgeschliffen sind, lange bevor die Schussdrähte auf der Laufseite verbraucht sind. Gemäss der DE-OS Nr. 2540490 wird diese Schwierigkeit dadurch teilweise gelöst, dass die Kettdrähte auf der Laufseite nur unter einem Schussdraht verlaufen. Dadurch werden die Kettbögen auf der Laufseite wesentlich kürzer, werden die Schussbögen länger und kann infolgedessen die Abkröpfung der Schussdrähte soweit vergrössert werden, dass die Kettdrähte auf der Laufseite gleichsam innerhalb der Schussdrähte eingebettet liegen. Durch genügend starkes Fixieren kann dabei erreicht werden, dass die Schussdrähte vor den Kettdrähten durchgeschliffen werden. Als Nachteil muss jedoch hierbei in Kauf genommen werden, dass die Schussdrähte nur wenige Hundertstel Millimeter stärker als die Kettdrähte sein dürfen, da sonst die Kettdrähte durch die stärkeren und steiferen Schussdrähte nach unten herausgedrückt werden und dadurch stärker dem Abrieb ausgesetzt sind. Es ist daher bei einem derartigen Sieb nicht möglich, zur Vergrösserung des Abriebvolumens stärkere Schussdrähte einzusetzen.Such screens are known from DE-OS Nos. 2263476 and 2540490. With these screens, all warp wires bind under the weft wires on the running side and are therefore exposed to abrasion. Since double-layer sieves tear open immediately when grinding through the warp wires - the warp wires transmit the entire driving force that acts on the sieve - the wear of the warp wires is the usual cause of the failure of a sieve. This is especially true for the sieves according to DE-OS No. 2263476, in which the warp wires are looped through long before the weft wires on the running side are used up. According to DE-OS No. 2540490, this difficulty is partially solved in that the warp wires run only under one weft wire on the running side. As a result, the warp bows on the barrel side become significantly shorter, the weft bows become longer and, as a result, the warping of the weft wires can be increased to such an extent that the warp wires on the barrel side are, as it were, embedded within the weft wires. Sufficiently strong fixing means that the weft wires can be looped through in front of the warp wires. As a disadvantage, however, it must be accepted that the weft wires may only be a few hundredths of a millimeter thicker than the warp wires, since otherwise the warp wires are pressed downwards by the stronger and stiffer weft wires and are therefore more exposed to abrasion. It is therefore not possible with such a sieve to use thicker weft wires to increase the abrasion volume.

Es hat nicht an Versuchen gefehlt, die Lebensdauer von mehrlagigen Papiermaschinensieben zu erhöhen, So wird nach der DE-OS Nr. 2455185 ein Papiermaschinensieb aus zwei in sich vollständigen Gewebebahnen aufgebaut, die durch eine spezielle Bindekette verbunden sind. Die Bindekette verläuft jedoch teilweise auf der Laufseite unter den Schussdrähten und ist daher dem Abschliff ausgesetzt. Je dünner die Bindekette ist, desto eher ist sie dabei durchgeschliffen. Ein derartiges aus zwei in sich vollständigen Gewebebahnen aufgebautes Sieb ist sehr teuer und aufwendig.There has been no lack of attempts to increase the service life of multi-layer paper machine screens. For example, according to DE-OS No. 2455185, a paper machine screen is constructed from two self-contained fabric webs which are connected by a special binding chain. However, the binding chain runs partially on the barrel side under the weft wires and is therefore exposed to grinding. The thinner the binding chain, the more it is looped through. Such a sieve made up of two self-contained fabric webs is very expensive and complex.

Schliesslich ist es aus der europäischen Patentanmeldungsveröffentlichung Nr. 0010311 bekannt, auf der Laufseite eines doppellagigen Papiermaschinensiebes die Anzahl der Schussdrähte stark zu reduzieren, um das Sieb durchlässiger zu machen. Zur Verlängerung der Laufzeit ist ein Teil der Kettdrähte nur in der unteren Lage des Siebes eingebunden, wodurch das Abriebvolumen erhöht werden soll. Diese in der unteren Lage befindlichen Kettdrähte bestimmen den Abstand auch der in der oberen Lage befindlichen Kettdrähte. Die geringe Anzahl der Kettdrähte auf der Papierseite führt zu einer starken Siebmarkierung im Papier. Nachteilig ist bei diesem Sieb insbesondere die kleine Zahl der Schussdrähte auf der Laufseite und die hohe Anzahl der Kettdrähte auf der Laufseite. Beide Merkmale haben zur Folge, dass auf der Laufseite jeder Schussdraht pro Rapport von drei oder vier Kettdrähten umschlungen wird und somit keine freie Länge zum Auswölben in Richtung zur Laufseite hat. Dieser Sieb ist somit ein reiner Kettläufer und reisst nach relativ kurzer Laufzeit auf, nämlich sobald die ungeschützten Bögen der Kettdrähte durchgeschliffen sind. In Fig. 5A dieser Druckschrift wird zwar ein Sieb dargestellt, bei dem ein Teil der Kettdrähte nicht nach unten abgekröpft ist, das heisst nicht in die untere Lage eingebunden ist. Das Drahtverhältnis auf der Laufseite bleibt dennoch ungünstig, da in die wenigen Schussdrähte der Laufseite mehr Kettdrähte eingebunden sind als auf der Papierseite.Finally, it is known from European Patent Application Publication No. 0010311 to greatly reduce the number of weft wires on the running side of a double-layer paper machine screen in order to make the screen more permeable. To extend the running time, some of the warp wires are only integrated in the lower layer of the screen, which is intended to increase the volume of abrasion. These warp wires in the lower layer also determine the distance between the warp wires in the upper layer. The small number of warp wires on the paper side leads to a strong screen marking in the paper. A disadvantage of this sieve is in particular the small number of weft wires on the running side and the high number of warp wires on the running side. Both features have the result that on the barrel side each weft wire is looped around by three or four warp wires per repeat and thus has no free length for bulging in the direction of the barrel side. This sieve is therefore a pure warp runner and tears open after a relatively short runtime, namely as soon as the unprotected arches of the warp wires are sanded through. In Fig. 5A of this document, a screen is shown in which a part of the warp wires is not bent down, that is, is not integrated into the lower layer. The wire ratio on the running side still remains unfavorable, since more warp wires are integrated in the few weft wires on the running side than on the paper side.

Ausgehend von der DE-OS Nr. 2540490 liegt der Erfindung die Aufgabe zugrunde, ein doppellagiges, für den Blattbildungsteil einer Papiermaschine vorgesehenes Sieb zu schaffen, das bei geringer Siebmarkierung im Papier und hoher Stabilität in Quer- und Längsrichtung eine verlängerte Laufzeit besitzt.Starting from DE-OS No. 2540490, the invention has for its object to provide a double-layer, intended for the sheet forming part of a paper machine, which has a longer running time with low screen marking in the paper and high stability in the transverse and longitudinal directions.

Diese Aufgabe wird bei einem Sieb der eingangs genannten Art dadurch gelöst, dass nur ein Teil der Kettfäden auch in die untere Lage des Siebes eingebunden ist.This object is achieved in a sieve of the type mentioned in the introduction in that only a part of the warp threads is also integrated in the lower layer of the sieve.

Bei der im Anspruch 3 angegebenen Ausgestaltung der Erfindung wird die Laufzeit zusätzlich durch das grössere Abriebvolumen der unteren Schussfäden verlängert.In the embodiment of the invention specified in claim 3, the running time is additionally extended by the larger abrasion volume of the lower weft threads.

Durch die im Anspruch 4 angegebene Ausgestaltung der Erfindung wird die abkröpfende Wirkung der Kettfäden verdoppelt, d.h. der Schussfaden wird stärker abgekröpft und die Kettfäden sind besser vor dem Abrieb geschützt.The embodiment of the invention specified in claim 4 doubles the cranking effect of the warp threads, i.e. the weft thread is bent more and the warp threads are better protected against abrasion.

Am einfachsten ist das erfindungsgemässe Sieb herzustellen, wenn die Kettzahl auf der Papierseite doppelt so hoch ist wie auf der Laufseite, da dann jeder zweite Kettdraht nicht in die untere Lage eingewoben ist. Es ist jedoch auch möglich, nur jeden dritten, vierten usw. Kettdraht in die untere Lage einzuweben, so dass das Verhältnis der Kettzahlen in der oberen bzw. unteren Lage 3:1,4:1 1 usw. beträgt. Die Kettzahl der oberen, zur Bildung der Papierbahn dienenden Lage ist vorzugsweise mindestens doppelt so hoch wie bei der unteren Lage. Durch die kleine Kettzahl in der unteren Lage erhält man ein sog. Schussläufersieb und sehr lange Schussflottierungen, d.h. grosse ungebundene Längen der Schussfäden, so dass sich der Abrieb auf ein grosses Fadenvolumen verteilt.The sieve according to the invention is easiest to manufacture if the number of warps on the paper side is twice as high as on the running side, since then every second warp wire is not woven into the lower layer. However, it is also possible to weave only every third, fourth, etc. warp wire into the lower layer, so that the ratio of the warp numbers in the upper or lower layer is 3: 1.4: 1 1, etc. The warp number of the upper layer used to form the paper web is preferably at least twice as high as that of the lower layer. Due to the small number of warps in the lower layer, you get a so-called weft screen and very long weft floats, ie large unbound ones Lengths of the weft threads so that the abrasion is distributed over a large thread volume.

Gegenuber einem zwei- oder mehrlagigen Sieb, welches aus mehreren in sich vollständigen Gewebebahnen besteht, wie es aus der DE-OS Nr. 24551 85 bekannt ist, besitzt das erfindungsgemässe Sieb alle Vorteile eines doppellagigen Siebes. Insbesondere wird durch Vermeidung der Teilung des Siebes in einzelne, in sich vollständige Gewebebahnen, während der Anwendung die Verstopfungsneigung durch Verschmutzung wesentlich verringert, sowie bei der Produktion der Siebe der gesamte Herstellungsablauf bedeutend vereinfacht: das Weben erfordert eine geringere Anzahl von Zettelwalzen, nach Ausweben eines Siebes geschieht die Umstellung auf beliebige, herkömmliche Bindungen ohne jeglichen Umzug im Geschirrsystem. Auch das Nahten der flachgewobenen Siebe geschieht mit üblichen Apparaten und ist entscheidend einfacher als bei Sieben aus mehreren einzelnen Gewebelagen, bei welchen jede einzelne Gewebelage getrennt genahtet werden muss.Compared to a two- or multi-layer screen, which consists of several self-contained fabric webs, as is known from DE-OS No. 24551 85, the screen according to the invention has all the advantages of a double-layer screen. In particular, by avoiding the division of the sieve into individual, complete webs of fabric, the tendency to clogging due to contamination is significantly reduced during use, and the entire production process is significantly simplified in the production of the sieves: weaving requires a smaller number of pinch rollers after weaving one Siebes happens the switch to any conventional bindings without any move in the harness system. The sewing of the flat-woven sieves is also done with conventional equipment and is significantly easier than with sieves made up of several individual fabric layers, in which each individual fabric layer has to be sewn separately.

Die Länge der Schussflottierung auf der Laufseite kann ohne Veränderung der Siebstruktur der Papierseite bei Bedarf verkürzt werden, indem jene Kettdrähte, welche in die untere Lage eingebunden sind, pro Rapport nicht nur einmal, sondern zwei- oder mehrmalig den unteren Schuss umschlingen, oder unter zwei Schüssen der unteren Lage geführt werden.The length of the weft floatation on the barrel side can be shortened if necessary without changing the screen structure of the paper side by looping the warp wires that are integrated in the lower layer not just once per repeat, but twice or more times, or under two Shots of the lower layer are performed.

So kann z. B. die freie Schussflottierung von 9 auf 7 Kettdrähte verkürzt werden, ohne dass die erfindungsgemässen Vorteile dieser neuen Gewebeart aufgehoben oder beeinträchtigt werden, denn mindestens die Hälfte der Kettdrähte bleibt, verborgen im Siebinneren, bis zum Ende der Laufzeit in voller Stärke, da sie dem Abrieb nicht ausgesetzt sind.So z. B. the free weft float can be shortened from 9 to 7 warp wires without the advantages of this new type of fabric according to the invention being nullified or impaired, because at least half of the warp wires remain hidden inside the screen until the end of the runtime in full strength, since they do Are not exposed to abrasion.

Die Kettdrähte und die Schussdrähte werden durch ein Kunststoffmonofil gebildet; geeignet sind insbesondere Polyester- und Polyamidmonofile. Wegen der Schwierigkeit, doppellagige Siebe rundzuweben, werden die Siebe flachgewoben.The warp wires and the weft wires are formed by a plastic monofilament; polyester and polyamide monofilaments are particularly suitable. Because of the difficulty of round weaving double-layered sieves, the sieves are woven flat.

Ein weiterer Vorteil des erfindungsgemässen Siebes besteht ferner darin, dass aufgrund der höheren Kettzahl in der oberen Lage die Papierseite des Siebes eine feinere Struktur besitzt und eine schwächere Markierung im Papier hinterlässt.Another advantage of the screen according to the invention is that, because of the higher number of warps in the upper layer, the paper side of the screen has a finer structure and leaves a weaker mark in the paper.

Diejenigen Kettdrähte, die nur in der oberen Lage des Siebes eingebunden sind, werden im nachfolgenden als Kraftübertragungskette bezeichnet, da sie den grössten Teil der auf das Sieb ausgeübten Längsspannung aufnehmen. Da die Kraftübertragungskette weitgehend gerade im Sieb verläuft, besitzt das erfindu.igsgemässe Sieb eine kleine KonstruktionsdehnulAg. Diejenigen Kettdrähte, die in beiden Lagen gebunden sind, werden nachfolgend als Konstruktionskette bezeichnet. Die Kraftübertragungskette kann dünner sein als die Konstruktionskette oder kann aus weniger dehnbarem Material als die Konstruktionskette bestehen. Für die Konstruktionskette kann insbesondere elastischeres Material verwendet werden, als üblicherweise für Kettdrähte in einem Papiermaschinensieb verwendet wird.Those warp wires that are only integrated in the upper layer of the sieve are referred to below as the power transmission chain, since they absorb most of the longitudinal tension exerted on the sieve. As the power transmission chain straight runs largely in the sieve, the sieve having a small erfindu.igsgemässe Konstruktionsdehnu l Ag. Those warp wires that are bound in both layers are referred to below as the construction chain. The power transmission chain can be thinner than the construction chain or can be made of less stretchable material than the construction chain. In particular, more elastic material can be used for the construction chain than is usually used for warp wires in a paper machine wire.

Ausführungsbeispiele der Erfindung werden nachfolgend anhand der Zeichnung erläutert. Es zeigen:

  • Fig. 1 das Papiermaschinensieb im Längsschnitt, wobei eine Konstruktionskette vor einer Kraftübertragungskette liegend dargestellt ist;
  • Fig. 2 den Verlauf der Kraftübertragungskette im Einzelnen;
  • Fig. 3 das Sieb im Schnitt in Querrichtung ;
  • Fig. 4 das Gewebebild der Papierseite eines 10 schäftig gewebten Gewebes;
  • Fig. 5 das Gewebebild der Laufseite des Gewebes von Fig.4;
  • Fig.6 das Papiermaschinensieb in abgewandelter Gewebeausführung, bei der die Konstruktionskette unter zwei Schussdrähten der unteren Lage verläuft;
  • Fig. 7 der Verlauf der Kraftübertragungskette bei dem Papiermaschinensieb nach Fig. 6;
  • Fig. 8 das Sieb in abgewandelter Ausführung im Schnitt in Querrichtung;
  • Fig. 9 die Ansicht der Papierseite bei abgewandelter Gewebeausführung, und
  • Fig. 10 die Ansicht der Laufseite des Gewebes von Fig. 9.
Embodiments of the invention are explained below with reference to the drawing. Show it:
  • Figure 1 shows the paper machine screen in longitudinal section, wherein a construction chain is shown lying in front of a power transmission chain.
  • 2 shows the course of the power transmission chain in detail;
  • Figure 3 shows the screen in cross section.
  • 4 shows the fabric image of the paper side of a woven fabric with 10 strands;
  • Figure 5 shows the fabric image of the running side of the fabric of Figure 4;
  • 6 shows the paper machine screen in a modified fabric version, in which the construction chain runs under two weft wires of the lower layer;
  • 7 shows the course of the power transmission chain in the paper machine screen according to FIG. 6;
  • 8 the sieve in a modified version in cross-section;
  • Fig. 9 is the view of the paper side with a modified fabric version, and
  • 10 shows the view of the running side of the fabric from FIG. 9.

Das in den Fig. 1 bis 3 gezeigte Sieb ist flach gewoben, das heisst die Kettfäden verlaufen in Maschinenrichtung und die Schussfäden quer zur Maschinenrichtung. Das Sieb enthält zwei Lagen von Schussdrähten, nämlich die oberen Schussdrähte 3, die die Papierseite des Siebes bilden, und die unteren Schussdrähte 4, die die Laufseite des Siebes bilden. Ein oberer Schussdraht 3 ist jeweils über einem unteren Schussdraht 4 angeordnet, d.h. die Schussdrähte sind paarweise vorhanden. Das Sieb enthält mindestens zwei Arten von Kettdrähten, nämlich eine sog. Konstruktionskette 1, die in die obere Lage 5 und die untere Lage 6 eingebunden ist, und eine sog. Kraftübertragungskette 2, die nur in die obere Lage 5 eingebunden ist.The screen shown in FIGS. 1 to 3 is woven flat, that is, the warp threads run in the machine direction and the weft threads crosswise to the machine direction. The sieve contains two layers of weft wires, namely the upper weft wires 3, which form the paper side of the sieve, and the lower weft wires 4, which form the running side of the sieve. An upper weft wire 3 is arranged above a lower weft wire 4, i.e. the weft wires are available in pairs. The screen contains at least two types of warp wires, namely a so-called construction chain 1, which is integrated in the upper layer 5 and the lower layer 6, and a so-called power transmission chain 2, which is only integrated in the upper layer 5.

Das erfindungsgemässe Sieb kann jede Art von Bindung besitzen, d.h. Köperbindung, Atlasbindung oder eine abgeleitete Bindung. Vorzugsweise besitzt das Sieb Atlasbindung, d.h. die Bindungspunkte berühren einander nicht und sind gleichmässig verteilt. Auf der Papierseite des Siebes ist die Kettzahl wesentlich höher als auf der Laufseite, da ein Teil der Kettdrähte, nämlich die Kraftübertragungskette 2, nicht in die untere Lage eingebunden ist. Die Kraftübertragungskette 2 wird daher im Betrieb nicht abgeschliffen und erleidet keinen Abrieb. Es sind keine Kettdrähte vorhanden, die nur in die untere Lage 6 eingebunden sind. Alle Kettdrähte, d.h. sowohl die Konstruktionskette 1 als auch die Kraftübertragungskette 2, sind in die obere Lage 5 eingebunden. Diese Kraftübertragungskette 2 kann die Siebspannung auch dann noch aufnehmen, wenn auf der Laufseite (untere Lage 6) des Siebes die Kett- und Schussdrähte bereits restlos abgeschliffen sind. Hier zeigt sich der entscheidende Vorteil dieser erfindungsmässigen Siebform: Das Sieb verfügt über ein vom Abrieb geschütztes Drahtsystem, welches das Gewebe zusammenhält, noch lange nachdem die für die Abnutzung bestimmten Drähte verbraucht werden. Die Kraftübertragungskette 2 soll ausserdem soweit wie möglich im Inneren des Siebes verlaufen, um ein möglichst markierungsfreies Sieb zu erhalten und eine gute Bahnabnahme zu erzielen. Ausserdem soll die Kraftübertragungskette 2 möglichst wenig Abkröpfungen aufweisen, d.h. einen geraden Verlauf besitzten, um dem Sieb eine hohe Längsstabilität und eine kleine Konstruktionsdehnung zu verleihen.The sieve according to the invention can have any type of weave, ie twill weave, satin weave or a derived weave. The screen preferably has satin weave, ie the weave points do not touch each other and are evenly distributed. The number of warps on the paper side of the wire is significantly higher than on the running side, since part of the warp wires, namely the power transmission chain 2, is not integrated in the lower layer. The power transmission chain 2 is therefore not ground during operation and does not suffer any abrasion. There are no warp wires that are only integrated in the lower layer 6. All warp wires, ie both the construction chain 1 and the power transmission chain 2, are integrated in the upper layer 5. This power transmission chain 2 can still use the fabric tension Pick up when the warp and weft wires on the running side (lower layer 6) of the sieve have already been completely ground off. This shows the decisive advantage of this sieve shape according to the invention: the sieve has a wire system which is protected from abrasion and holds the fabric together long after the wires intended for wear are used up. The power transmission chain 2 should also run as far as possible inside the screen in order to obtain a screen that is as free of markings as possible and to achieve a good web acceptance. In addition, the power transmission chain 2 should have as few bends as possible, ie have a straight course, in order to give the screen a high degree of longitudinal stability and a small constructional stretch.

Die Fig. 4 und 5 zeigen das Gewebebild der Papierseite bzw. der Laufseite eines erfindungsgemässen Siebes. Die Draufsicht von Fig. 4 zeigt einen 5schäftigen Atlas und das der Fig. 5 einen 10schäftigen Atlas. In Fig. 4 entsprechen die Bindungspunkte 7 den Kröpfungen der Konstruktionskette 1 und der Kraftübertragungskette 2, während in Fig. 5 die Bindungspunkte 8 nur von der Konstruktionskette 1 herrühren.4 and 5 show the fabric image of the paper side or the running side of a screen according to the invention. The top view of FIG. 4 shows a 5-shaft atlas and that of FIG. 5 shows a 10-shaft atlas. In FIG. 4, the binding points 7 correspond to the cranks of the construction chain 1 and the power transmission chain 2, while in FIG. 5 the binding points 8 only originate from the construction chain 1.

In den Fig. 6 bis 10 wird eine Variante der erfindungsmässigen Ausführung gezeigt. Die Konstruktionskette 1 verläuft auf der Laufseite unter zwei Schussdrähten (Fig. 6). Die Kraftübertragungskette 2 verläuft, entsprechend dem Prinzip der Erfindung, vorwiegend im Inneren des Siebes und bindet lediglich die Schussdrähte 3 der oberen Lage 5. Die notwendige Zugfestigkeit des Gewebes bleibt nach der Zerstörung der unteren Lage des Siebes erhalten. Der Verlauf der Kraftübertragungskette 2 ist bei beiden Bindungen gleich, somit sind die Bilder 2 und 7 identisch.6 to 10 show a variant of the embodiment according to the invention. The construction chain 1 runs on the running side under two weft wires (FIG. 6). In accordance with the principle of the invention, the force transmission chain 2 runs predominantly inside the sieve and only binds the weft wires 3 of the upper layer 5. The necessary tensile strength of the fabric is retained after the lower layer of the sieve has been destroyed. The course of the power transmission chain 2 is the same for both bindings, so Figures 2 and 7 are identical.

Die Struktur der oberen Lage beider Siebausführungen ist ebenfalls gleich, deswegen ist das Gewebebild bei den Fig. 4 und 9 identisch. Lediglich die untere Lage des Siebes (Fig. 10) zeigt eine Verlängerung der Kettabkröpfungen 8 und eine Verkürzung der Abkröpfungen 9 der Schussdrähte. Bei den Abkröpfungen 8 auf der Laufseite liegen die zwei Kettdrähte 1 stets paarweise zusammen, womit die abkröpfende Wirkung dieser Kettdrähte verdoppelt wird.The structure of the top layer of both screen designs is also the same, therefore the fabric image in FIGS. 4 and 9 is identical. Only the lower layer of the screen (FIG. 10) shows an extension of the warp crooks 8 and a shortening of the crooks 9 of the weft wires. In the cranking 8 on the running side, the two warp wires 1 are always in pairs, which doubles the cranking effect of these warp wires.

Bei den Ausführungsbeispielen der Erfindung wurde ein mit 10 Schäften webbares Gewebe mit Atlasverteilung gezeigt. Die Steuerung der Länge der Schussflottierungen der unteren Lage ist vor allem bei Geweben mit höherem Webrapport von Bedeutung, damit auf der Laufseite die Länge der Schussabkröpfung den Anforderungen des jeweiligen Bedarfsfalles angepasst werden kann.In the exemplary embodiments of the invention, a weave with at least 10 shafts and an atlas distribution was shown. Controlling the length of the weft floats in the lower layer is particularly important for fabrics with a higher weave repeat, so that the length of the weft bend on the barrel side can be adapted to the requirements of the particular case.

Beispiel:Example:

Bei einem Gewebe mit Atlasverteilung der Abkröpfungen, gewoben mit 14 Schäften, einer Dichte der Kettdrähte aus Polyestermonofil von 52 Drähten pro Zentimeter und einem Drahtdurchmesser von 0,20 mm ergibt sich auf der oberen Gewebelage 5 ein Gewebebild entsprechend einer 7schäftigen Rapportlänge. Die Schusszahl beträgt für beide Lagen 24 Drähte pro Zentimeter. Der Durchmesser der Schussdrähte 3 der oberen Lage ist 0,18 mm, diese Schussdrähte sind ebenfalls alle aus Polyestermonofil.With a fabric with an atlas distribution of the offsets, woven with 14 shafts, a density of the warp wires made of polyester monofilament of 52 wires per centimeter and a wire diameter of 0.20 mm, a fabric image corresponding to a 7-shaft repeat length results on the upper fabric layer 5. The number of shots for both layers is 24 wires per centimeter. The diameter of the weft wires 3 of the upper layer is 0.18 mm, these weft wires are also all made of polyester monofilament.

Die untere Gewebelage 6 wird mit wesentlich dickeren Schussdrähten gewoben, nämlich mit einem Durchmesser von 0,27 mm Polyestermonofil wobei die Möglichkeit besteht, zur weiteren Erhöhung der Abriebfestigkeit, in diese Lage wechselweise Polyester- und Polyamidmonofile einzuweben. Je nach Beanspruchung des Siebes kann die Wechselfolge 1:1 betragen, in extremen Fällen jedoch 2:1, wobei dann zwei Polyamiddrähte und ein Polyesterdraht eingewoben werden.The lower fabric layer 6 is woven with substantially thicker weft wires, namely with a diameter of 0.27 mm polyester monofilament, with the possibility of alternately weaving polyester and polyamide monofilaments into this layer to further increase the abrasion resistance. Depending on the strain on the screen, the alternation can be 1: 1, in extreme cases 2: 1, in which case two polyamide wires and one polyester wire are woven.

Claims (4)

1. A double;ply fabric for the sheet forming section of a papermaking machine with synthetic monofilament weft filaments oriented transversely to the machine direction and all arranged in pairs one over the other and with synthetic monofilament warp filaments oriented in machine direction all of which are woven into the top layer of the fabric, characterized in that only part of the warp filaments (construction warp 1) are also woven into the bottom layer (6) of the fabric.
2. Fabric according to claim 1, characterized in that the number of warp filaments in the top fabric layer serving to form the paper sheet is at least twice that contained in the bottom layer.
3. Fabric according to claim 1, characterized in that the lower weft filaments (4) are at least 20 % preferably at least 30 % thicker than the warp filaments.
4. Fabric according to anyone of claims 1 to 3, characterized in that the crimps (8) of the warp filaments (construction warp 1) which are also woven into the bottom layer (6) are always disposed in pairs in this layer.
EP81107606A 1980-09-26 1981-09-24 Two-layered sieve for the sheet forming zone of a paper machine Expired EP0048962B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81107606T ATE6877T1 (en) 1980-09-26 1981-09-24 DOUBLE PLY FILTER FOR THE SHEET FORMING SECTION OF A PAPER MACHINE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3036409A DE3036409C2 (en) 1980-09-26 1980-09-26 Double-layer screen for the screen part of a paper machine
DE3036409 1980-09-26

Publications (4)

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EP0048962A2 EP0048962A2 (en) 1982-04-07
EP0048962A3 EP0048962A3 (en) 1982-06-23
EP0048962B1 EP0048962B1 (en) 1984-03-28
EP0048962B2 true EP0048962B2 (en) 1988-03-16

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EP (1) EP0048962B2 (en)
JP (1) JPS5789696A (en)
AR (1) AR226612A1 (en)
AT (1) ATE6877T1 (en)
BR (1) BR8106086A (en)
CA (1) CA1159293A (en)
DE (2) DE3036409C2 (en)
ES (1) ES505626A0 (en)
FI (1) FI77705C (en)
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7766053B2 (en) 2008-10-31 2010-08-03 Weavexx Corporation Multi-layer papermaker's forming fabric with alternating paired and single top CMD yarns
US7931051B2 (en) 2008-01-23 2011-04-26 Weavexx Corporation Multi-layer papermaker's forming fabric with long machine side MD floats
US8251103B2 (en) 2009-11-04 2012-08-28 Weavexx Corporation Papermaker's forming fabric with engineered drainage channels

Families Citing this family (60)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3146385C2 (en) * 1981-11-23 1985-10-31 Hermann Wangner Gmbh & Co Kg, 7410 Reutlingen Double-layer fabric as a covering for paper machines
US4423755A (en) * 1982-01-22 1984-01-03 Huyck Corporation Papermakers' fabric
SE441016B (en) * 1982-04-26 1985-09-02 Nordiskafilt Ab PREPARATION WIRES FOR PAPER, CELLULOSA OR SIMILAR MACHINES
DE3307144A1 (en) * 1983-03-01 1984-09-13 Hermann Wangner Gmbh & Co Kg, 7410 Reutlingen PAPER MACHINE COVERING IN A FABRIC BINDING THAT DOES NOT HAVE A SYMMETRY AXIS LONGITUDE
US4564051A (en) * 1983-07-16 1986-01-14 Andreas Kufferath Gmbh & Co. Kg Multiple ply dewatering screen particularly for a web forming part of a paper making machine
CA1226463A (en) * 1983-07-16 1987-09-08 Heinz Odenthal Multiple ply dewatering screen
AT382653B (en) * 1983-09-22 1987-03-25 Hutter & Schrantz Ag DRAINAGE SCREEN FOR PAPER MACHINES AND THE LIKE
US5114777B2 (en) * 1985-08-05 1997-11-18 Wangner Systems Corp Woven multilayer papermaking fabric having increased stability and permeability and method
US4789009A (en) * 1986-01-08 1988-12-06 Huyck Corporation Sixteen harness dual layer weave
US4995429A (en) * 1986-02-05 1991-02-26 Albany International Corp. Paper machine fabric
DE3615304A1 (en) * 1986-05-06 1987-11-12 Wangner Gmbh Co Kg Hermann COVER FOR THE SHEET FORMING PART OF A PAPER MACHINE
US4709732A (en) * 1986-05-13 1987-12-01 Huyck Corporation Fourteen harness dual layer weave
DE3634134A1 (en) * 1986-10-07 1988-04-21 Wangner Gmbh Co Kg Hermann COVER FOR THE SHEET FORMING PART OF A PAPER MACHINE
DE3634649A1 (en) * 1986-10-10 1988-04-14 Wangner Gmbh Co Kg Hermann COVERING FOR THE SHEET FORMING PART OF A PAPER MACHINE WITH ADDITIONAL, FLOATING CROSSFEDS LARGER RAPPORT LENGTH
US4771814A (en) * 1987-04-13 1988-09-20 Niagara Lockport Industries, Inc. Seam for multilayer papermaking fabric and method of making same
DE3713510A1 (en) * 1987-04-22 1988-11-10 Oberdorfer Fa F PAPER MACHINE SCREEN FROM A DOUBLE-LAYER FABRIC
JP2724586B2 (en) * 1988-04-04 1998-03-09 日本フィルコン株式会社 Double woven fabric for papermaking
JP2715097B2 (en) * 1988-06-09 1998-02-16 日本フイルコン株式会社 Weft wear type papermaking fabric
JP2609134B2 (en) * 1988-06-27 1997-05-14 日本フイルコン株式会社 Double woven fabric for papermaking
DE3823085A1 (en) * 1988-07-07 1990-01-11 Oberdorfer Fa F DOUBLE FABRIC AS A SCREEN FOR THE WET SECTION OF A PAPER MACHINE
US4909284A (en) * 1988-09-23 1990-03-20 Albany International Corp. Double layered papermaker's fabric
US5052448A (en) * 1989-02-10 1991-10-01 Huyck Corporation Self stitching multilayer papermaking fabric
US4967805A (en) * 1989-05-23 1990-11-06 B.I. Industries, Inc. Multi-ply forming fabric providing varying widths of machine direction drainage channels
US5054525A (en) * 1989-06-23 1991-10-08 F. Oberdorfer Gmbh & Co. Double layer forming wire fabric
US4987929A (en) * 1989-08-25 1991-01-29 Huyck Corporation Forming fabric with interposing cross machine direction yarns
FI90261C (en) * 1990-03-02 1994-01-10 Tamfelt Oy Ab papermakers
US5025839A (en) * 1990-03-29 1991-06-25 Asten Group, Inc. Two-ply papermakers forming fabric with zig-zagging MD yarns
FI85605C (en) * 1990-06-15 1994-06-28 Tamfelt Oy Ab Tvaoskiktad pappersmaskinsduk
US5067526A (en) * 1990-08-06 1991-11-26 Niagara Lockport Industries, Inc. 14 harness dual layer papermaking fabric
WO1993003221A1 (en) * 1991-07-29 1993-02-18 Jwi Ltd. Non-marking wear resistant double layer fabrics
US5158117A (en) * 1991-07-30 1992-10-27 Tamfelt Oy Ab Two-layer paper machine cloth
JPH05277006A (en) * 1992-04-01 1993-10-26 Yoshida Kogyo Kk <Ykk> Cloth
JP2576583Y2 (en) * 1992-08-31 1998-07-16 ワイケイケイ株式会社 Tape for slide fastener
US5421374A (en) * 1993-10-08 1995-06-06 Asten Group, Inc. Two-ply forming fabric with three or more times as many CMD yarns in the top ply than in the bottom ply
US5454405A (en) * 1994-06-02 1995-10-03 Albany International Corp. Triple layer papermaking fabric including top and bottom weft yarns interwoven with a warp yarn system
US5518042A (en) * 1994-09-16 1996-05-21 Huyck Licensco, Inc. Papermaker's forming fabric with additional cross machine direction locator and fiber supporting yarns
US5709250A (en) * 1994-09-16 1998-01-20 Weavexx Corporation Papermakers' forming fabric having additional fiber support yarns
US5983953A (en) * 1994-09-16 1999-11-16 Weavexx Corporation Paper forming progess
US5641001A (en) * 1995-08-16 1997-06-24 Huyck Licensco, Inc. Papermaker's fabric with additional cross machine direction yarns positioned in saddles
US5937914A (en) * 1997-02-20 1999-08-17 Weavexx Corporation Papermaker's fabric with auxiliary yarns
US5967195A (en) * 1997-08-01 1999-10-19 Weavexx Corporation Multi-layer forming fabric with stitching yarn pairs integrated into papermaking surface
US6112774A (en) * 1998-06-02 2000-09-05 Weavexx Corporation Double layer papermaker's forming fabric with reduced twinning.
US6123116A (en) * 1999-10-21 2000-09-26 Weavexx Corporation Low caliper mechanically stable multi-layer papermaker's fabrics with paired machine side cross machine direction yarns
US6179013B1 (en) 1999-10-21 2001-01-30 Weavexx Corporation Low caliper multi-layer forming fabrics with machine side cross machine direction yarns having a flattened cross section
US6585006B1 (en) 2000-02-10 2003-07-01 Weavexx Corporation Papermaker's forming fabric with companion yarns
US6244306B1 (en) 2000-05-26 2001-06-12 Weavexx Corporation Papermaker's forming fabric
US6253796B1 (en) 2000-07-28 2001-07-03 Weavexx Corporation Papermaker's forming fabric
DE10123204C2 (en) * 2001-05-12 2003-03-27 Kufferath Andreas Gmbh papermaker
US6745797B2 (en) 2001-06-21 2004-06-08 Weavexx Corporation Papermaker's forming fabric
US6837277B2 (en) 2003-01-30 2005-01-04 Weavexx Corporation Papermaker's forming fabric
US6860969B2 (en) 2003-01-30 2005-03-01 Weavexx Corporation Papermaker's forming fabric
JP4819477B2 (en) * 2005-10-31 2011-11-24 日本フイルコン株式会社 Industrial two-layer fabric
WO2008073301A2 (en) * 2006-12-08 2008-06-19 Astenjohnson, Inc. Machine side layer weave design for composite forming fabrics
JP5280160B2 (en) * 2008-11-12 2013-09-04 日本フイルコン株式会社 Industrial multilayer fabric with drawn wefts
US8196613B2 (en) * 2009-02-25 2012-06-12 Kevin John Ward Multi-layer papermaker's forming fabric with paired MD binding yarns
FI20115222L (en) * 2011-03-04 2012-09-05 Metso Fabrics Oy Paper machine fabric
US10953355B2 (en) 2013-08-29 2021-03-23 Clear Edge-Germany Gmbh Filter element
GB201315363D0 (en) * 2013-08-29 2013-10-09 Clear Edge Germany Gmbh Filter element
US10953354B2 (en) 2013-08-29 2021-03-23 Clear Edge-Germany Gmbh Filter element
GB201315362D0 (en) * 2013-08-29 2013-10-09 Clear Edge Germany Gmbh Filter Element

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA711428A (en) * 1965-06-15 Dominion Ayers Limited Water-permeable felt
US2934097A (en) * 1956-12-06 1960-04-26 Hindle Thomas Papermakers' dryer felts
US4071050A (en) * 1972-09-01 1978-01-31 Nordiska Maskinfilt Aktiebolaget Double-layer forming fabric
SE366353B (en) * 1972-09-01 1974-04-22 Nordiska Maskinfilt Ab
US3885603A (en) * 1973-11-21 1975-05-27 Creech Evans S Papermaking fabric
DE2455184A1 (en) * 1973-11-21 1975-05-22 Slaughter Philip H Fourdrinier screen woven fabric - formed by two superposed woven layers interconnected by warp yarns
SE385486B (en) * 1974-10-10 1976-07-05 Nordiska Maskinfilt Ab PROPAGATION WIRE FOR PAPER, CELLULOSE OR SIMILAR MACHINES AND MANUFACTURED THE SAME
US4289173A (en) * 1975-10-30 1981-09-15 Scapa-Porritt Limited Papermakers fabrics
SE397371C (en) * 1976-02-24 1980-08-18 Nordiska Maskinfilt Ab PREPARATION VIRUS FOR PAPER, CELLULOSA OR SIMILAR MACHINES
US4071009A (en) * 1976-06-28 1978-01-31 Caterpillar Tractor Co. Combined noise suppressing and air flow guide enclosure for engines
GB1572905A (en) * 1976-08-10 1980-08-06 Scapa Porritt Ltd Papermakers fabrics
JPS5512863A (en) * 1978-07-13 1980-01-29 Nippon Filcon Kk Synthetic resin net for paper making
US4314589A (en) * 1978-10-23 1982-02-09 Jwi Ltd. Duplex forming fabric
NZ191731A (en) * 1978-10-23 1982-11-23 Jwi Ltd Duplex forming fabric for papermaking
US4344464A (en) * 1980-07-11 1982-08-17 Huyck Corporation Endless forming fabrics with bi-crimp characteristics
US4359069A (en) * 1980-08-28 1982-11-16 Albany International Corp. Low density multilayer papermaking fabric

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7931051B2 (en) 2008-01-23 2011-04-26 Weavexx Corporation Multi-layer papermaker's forming fabric with long machine side MD floats
US7766053B2 (en) 2008-10-31 2010-08-03 Weavexx Corporation Multi-layer papermaker's forming fabric with alternating paired and single top CMD yarns
US8251103B2 (en) 2009-11-04 2012-08-28 Weavexx Corporation Papermaker's forming fabric with engineered drainage channels

Also Published As

Publication number Publication date
ATE6877T1 (en) 1984-04-15
US4499927A (en) 1985-02-19
DE3036409C2 (en) 1983-01-20
MX158729A (en) 1989-03-08
NO153616B (en) 1986-01-13
JPH0214475B2 (en) 1990-04-09
EP0048962A2 (en) 1982-04-07
BR8106086A (en) 1982-06-08
ES8308379A1 (en) 1983-08-16
ES505626A0 (en) 1983-08-16
EP0048962A3 (en) 1982-06-23
DE3162899D1 (en) 1984-05-03
DE3036409A1 (en) 1982-05-13
JPS5789696A (en) 1982-06-04
NO813262L (en) 1982-03-29
EP0048962B1 (en) 1984-03-28
FI812994L (en) 1982-03-27
AR226612A1 (en) 1982-07-30
FI77705B (en) 1988-12-30
FI77705C (en) 1990-07-25
CA1159293A (en) 1983-12-27
NO153616C (en) 1986-05-21

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