EP0950739A2 - Screen-cloth - Google Patents

Screen-cloth Download PDF

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Publication number
EP0950739A2
EP0950739A2 EP19990106724 EP99106724A EP0950739A2 EP 0950739 A2 EP0950739 A2 EP 0950739A2 EP 19990106724 EP19990106724 EP 19990106724 EP 99106724 A EP99106724 A EP 99106724A EP 0950739 A2 EP0950739 A2 EP 0950739A2
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EP
European Patent Office
Prior art keywords
screen fabric
section
cross
fibrous web
threads
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19990106724
Other languages
German (de)
French (fr)
Other versions
EP0950739A3 (en
EP0950739B1 (en
Inventor
Karl Dr. Steiner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Voith Patent GmbH
Original Assignee
Voith Sulzer Papiertechnik Patent GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Voith Sulzer Papiertechnik Patent GmbH filed Critical Voith Sulzer Papiertechnik Patent GmbH
Publication of EP0950739A2 publication Critical patent/EP0950739A2/en
Publication of EP0950739A3 publication Critical patent/EP0950739A3/en
Application granted granted Critical
Publication of EP0950739B1 publication Critical patent/EP0950739B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D11/00—Double or multi-ply fabrics not otherwise provided for
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/30—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the fibres or filaments
    • D03D15/37—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the fibres or filaments with specific cross-section or surface shape
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/40—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads
    • D03D15/44—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads with specific cross-section or surface shape
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S162/00—Paper making and fiber liberation
    • Y10S162/90—Papermaking press felts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S162/00—Paper making and fiber liberation
    • Y10S162/902—Woven fabric for papermaking drier section
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2973—Particular cross section
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/30—Woven fabric [i.e., woven strand or strip material]
    • Y10T442/3065—Including strand which is of specific structural definition
    • Y10T442/3089—Cross-sectional configuration of strand material is specified
    • Y10T442/3114—Cross-sectional configuration of the strand material is other than circular
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/30—Woven fabric [i.e., woven strand or strip material]
    • Y10T442/3065—Including strand which is of specific structural definition
    • Y10T442/3089—Cross-sectional configuration of strand material is specified
    • Y10T442/3114—Cross-sectional configuration of the strand material is other than circular
    • Y10T442/3122—Cross-sectional configuration is multi-lobal

Definitions

  • the invention relates to a screen fabric for a machine for manufacturing and / or Refinement of a fibrous web, in particular a paper, cardboard or tissue web consisting of at least one layer of interwoven in the running direction aligned longitudinal threads and transverse threads running transversely thereto.
  • Such screen fabrics are known for example from DE-OS 41 41 139.
  • it should also give high water vapor permeability be so that the water vapor can be discharged through the sieve.
  • the screen mesh should be largely closed, in order to minimize it Leave markings in the fibrous web. This is said in the above OS can be achieved in that the threads have a trapezoidal cross section, the parallel sides should run parallel to the running direction. The adhesion of the fibrous web to the screen fabric is in need of improvement.
  • this object is achieved in that at least part of the Cross threads an approximately teardrop-shaped or essentially three-sided, acute-angled Has cross-section, the pointed end approximately in the running direction of the screen fabric is aligned.
  • the air flow due to the sieve run along the cross thread generated because of special shape of the cross section after the cross thread a negative pressure, which the Adhesion of the fibrous web to the screen fabric improved.
  • This can be reinforced nor in that the angle between the bisector of the pointed end of the respective cross-section and the surface of the Sieve cloth is between 2 ° and 70 °, preferably between 5 ° and 40 °.
  • the angle between the bisector of the pointed end of the respective cross-section and the surface of the Sieve cloth is between 2 ° and 70 °, preferably between 5 ° and 40 °.
  • the angle between the bisector of the pointed end of the respective cross-section and the surface of the Sieve cloth is between 2 ° and 70 °, preferably between 5 ° and 40 °.
  • This effect of the negative pressure formation is particularly also then well pronounced when the side of the transverse thread facing the fibrous web runs approximately parallel to the fibrous web or is even inclined to it, in the form that the distance between the two is opposite to the running direction of the screen fabric enlarged.
  • the good water vapor permeability, the strength and the closed execution are hardly affected.
  • a teardrop-shaped or essentially three-sided have an acute-angled cross-section.
  • the cross threads should be in the area a flat surface of the screen fabric that is not touched by the fibrous web Have cross-section and preferably be oriented approximately in the running direction.
  • all transverse threads should be approximately teardrop-shaped or in have an essential three-sided, acute-angled cross-section.
  • the longitudinal threads should always be flat or round, which strengthens the strength and the Flow conditions on the cross threads little affected. This is particularly suitable Screen fabrics for use in the former, in a press section or in one Drying section of a paper machine.
  • a relatively simple way of producing the cross section according to the invention the cross threads is that the cross threads through the press nip of two rollers are guided, at least one roller having a groove running in the circumferential direction to form the cross-sectional profile of the cross threads. It is also possible this shape already when casting the transverse threads by means of an appropriate nozzle achieve.
  • the screen fabric consists of interwoven in the running direction 1 aligned longitudinal threads 2 and transverse threads 3 running transversely thereto. While in 1 a layer of longitudinal threads 2 and transverse threads 3 is interwoven, however, there are two layers in FIG. 2.
  • the transverse threads 3 have an approximately has a drop-shaped or essentially triangular, acute-angled cross-section, the pointed end 4 is aligned approximately in the running direction 1 of the screen fabric.
  • the angle between the bisector 5 of the pointed end 4 of the respective cross section and the surface of the fibrous web 6 touched Sieve cloth between 2 ° and 70 °, preferably between 5 ° and 40 °.
  • the side of the transverse threads 3 facing the fibrous web 6 runs approximately parallel to the Fibrous web 6. This ensures that the air is substantially is guided away from the fibrous web 6 due to the running of the screen fabric. in the The result is a negative pressure after the transverse threads 3, which the liability of Fiber web 6 improved on the screen fabric.
  • the longitudinal threads 2 have in both cases a round cross section.
  • the transverse threads 3 can be guided through the press nip of two rollers be, with at least one roller corresponding in the circumferential direction running groove.
  • This groove can extend along the circumference of the roller have a changing profile, which corresponds to the cross-sectional profile of the Cross thread 3 affects.
  • transverse threads 3 in FIG. 1 have an essentially three-sided, acute-angled one Have cross-section with rounded corners, is an approximately drop-shaped in Figure 2 Cross section of the transverse thread 3 shown.
  • the screen fabric can also have more than two layers of longitudinal threads 2 and Have cross threads 3.

Abstract

The woven fourdrinier material, for a machine to produce a fiber web, has wefts (3) which at least partially have a teardrop or triangular pointed cross section. The pointed ends (4) are aligned on the direction (1) of fourdrinier travel. The angle between the bisection (5) of the pointed ends of each cross section and the fourdrinier surface in contact with the fiber web (6) is 2-70 degrees and pref. 5-40 degrees . The side of the wefts (3) towards the fiber web (6) is parallel to the web (6), or at an angled shape to it so that the gap between them is increased against the direction (1) of travel. The side of the wefts (3) away from the fiber web (6) has a flat cross section, pref. aligned on the direction (1) of travel. The warps (2) are flat or round.

Description

Die Erfindung betrifft ein Siebgewebe für eine Maschine zur Herstellung und/oder Veredelung einer Faserstoffbahn, insbesondere einer Papier,- Karton- oder Tissuebahn bestehend aus zumindest je einer Lage von miteinander verwobenen in Laufrichtung ausgerichteten Längsfäden und quer dazu verlaufenden Querfäden.The invention relates to a screen fabric for a machine for manufacturing and / or Refinement of a fibrous web, in particular a paper, cardboard or tissue web consisting of at least one layer of interwoven in the running direction aligned longitudinal threads and transverse threads running transversely thereto.

Derartige Siebgewebe sind beispielsweise aus der DE-OS 41 41 139 bekannt. Dabei soll neben einer guten Festigkeit auch eine hohe Wasserdampfdurchlässigkeit gegeben sein, damit der Wasserdampf durch das Sieb abgeführt werden kann. Außerdem soll das Siebgewebe weitgehend geschlossen ausgeführt sein, um möglichst geringe Markierungen in der Faserstoffbahn zu hinterlassen. Dies soll in der oben genannten OS dadurch erreicht werden, daß die Fäden einen trapezförmigen Querschnitt besitzen, wobei die parallelen Seiten parallel zur Laufrichtung verlaufen sollen. Verbesserungswürdig ist dabei die Haftung der Faserstoffbahn am Siebgewebe.Such screen fabrics are known for example from DE-OS 41 41 139. Here In addition to good strength, it should also give high water vapor permeability be so that the water vapor can be discharged through the sieve. In addition, should the screen mesh should be largely closed, in order to minimize it Leave markings in the fibrous web. This is said in the above OS can be achieved in that the threads have a trapezoidal cross section, the parallel sides should run parallel to the running direction. The adhesion of the fibrous web to the screen fabric is in need of improvement.

Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß zumindest ein Teil der Querfäden einen etwa tropfenförmigen oder im wesentlichen dreiseitigen, spitzwinkligen Querschnitt besitzt, wobei das spitze Endes etwa in Laufrichtung des Siebgewebes ausgerichtet ist.According to the invention, this object is achieved in that at least part of the Cross threads an approximately teardrop-shaped or essentially three-sided, acute-angled Has cross-section, the pointed end approximately in the running direction of the screen fabric is aligned.

Die Luftströmung infolge des Sieblaufes am Querfaden entlang erzeugt wegen der besonderen Form des Querschnitts nach dem Querfaden einen Unterdruck, der die Haftung der Faserstoffbahn am Siebgewebe verbessert. Verstärkt werden kann dies noch dadurch, daß der Winkel zwischen der Winkelhalbierenden des spitzen Ende des jeweiligen Querschnitts und der von der Faserstoffbahn berührten Oberfläche des Siebgewebes zwischen 2 ° und 70 °, vorzugsweise zwischen 5 ° und 40 ° liegt. Dabei wird ein vergrößerter Teil der vom spitzen Ende des Querfadens geteilten Luftströmung von der von der Faserstoffbahn berührten Oberfläche weggeführt, was den Unterdruck nach dem Querfaden erhöht. Dieser Effekt der Unterdruckbildung ist insbesondere auch dann gut ausgeprägt, wenn die der Faserstoffbahn zugewandte Seite des Querfadens etwa parallel zur Faserstoffbahn verläuft oder zu dieser sogar geneigt ist, in der Form, daß sich der Abstand zwischen beiden entgegen der Laufrichtung des Siebgewebes vergrößert. Die gute Wasserdampfdurchlässigkeit, die Festigkeit sowie die geschlossene Ausführung werden davon kaum beeinflußt.The air flow due to the sieve run along the cross thread generated because of special shape of the cross section after the cross thread a negative pressure, which the Adhesion of the fibrous web to the screen fabric improved. This can be reinforced nor in that the angle between the bisector of the pointed end of the respective cross-section and the surface of the Sieve cloth is between 2 ° and 70 °, preferably between 5 ° and 40 °. Here becomes an enlarged part of the air flow divided by the pointed end of the cross thread led away from the surface touched by the fibrous web, causing the negative pressure after the cross thread increased. This effect of the negative pressure formation is particularly also then well pronounced when the side of the transverse thread facing the fibrous web runs approximately parallel to the fibrous web or is even inclined to it, in the form that the distance between the two is opposite to the running direction of the screen fabric enlarged. The good water vapor permeability, the strength and the closed execution are hardly affected.

Zur Gewährleistung einer ausreichenden Haftung kann es durchaus genügen, wenn im wesentlichen nur die Querfäden im Bereich der von der Faserstoffbahn berührten Oberfläche des Siebgewebes einen tropfenförmigen oder im wesentlichen dreiseitigen, spitzwinkligen Querschnitt aufweisen. In diesem Fall sollten die Querfäden im Bereich der nicht von der Faserstoffbahn berührten Oberfläche des Siebgewebes einen flachen Querschnitt besitzen und vorzugsweise etwa in Laufrichtung orientiert sein. Insbesondere dann, wenn eine starke Haftung beispielsweise bei schweren Papieren gewünscht ist, sollten jedoch alle Querfäden einen etwa tropfenförmigen oder im wesentlichen dreiseitigen, spitzwinkligen Querschnitt haben.To ensure sufficient liability, it may be sufficient if in essentially only the transverse threads in the area touched by the fibrous web Surface of the screen fabric a teardrop-shaped or essentially three-sided, have an acute-angled cross-section. In this case, the cross threads should be in the area a flat surface of the screen fabric that is not touched by the fibrous web Have cross-section and preferably be oriented approximately in the running direction. Especially when there is strong adhesion, for example to heavy papers is desired, however, all transverse threads should be approximately teardrop-shaped or in have an essential three-sided, acute-angled cross-section.

Die Längsfäden sollten immer flach oder rund sein, was die Festigkeit stärkt und die Strömungsverhältnisse an den Querfäden wenig beeinflußt. Besonders geeignet ist das Siebgewebe zur Verwendung im Former, in einer Pressenpartie oder in einer Trockenpartie einer Papiermaschine.The longitudinal threads should always be flat or round, which strengthens the strength and the Flow conditions on the cross threads little affected. This is particularly suitable Screen fabrics for use in the former, in a press section or in one Drying section of a paper machine.

Eine relativ einfache Möglichkeit zur Herstellung des erfindungsgemäßen Querschnittes der Querfäden besteht darin, daß die Querfäden durch den Preßspalt zweier Walzen geführt werden, wobei zumindest eine Walze eine in Umfangsrichtung verlaufende Rille zur Bildung des Querschnittprofils der Querfäden besitzt. Es ist außerdem möglich, diese Form bereits beim Gießen der Querfäden mittels einer entsprechenden Düse zu erzielen.A relatively simple way of producing the cross section according to the invention the cross threads is that the cross threads through the press nip of two rollers are guided, at least one roller having a groove running in the circumferential direction to form the cross-sectional profile of the cross threads. It is also possible this shape already when casting the transverse threads by means of an appropriate nozzle achieve.

Nachfolgend soll die Erfindung an zwei Ausführungsbeispielen näher erläutert werden. In der beigefügten Zeichnung zeigt:

  • Figur 1: ein einlagiges Siebgewebe und
  • Figur 2: ein zweilagiges Siebgewebe.
    • The invention will be explained in more detail below using two exemplary embodiments. The attached drawing shows:
  • Figure 1: a single-layer screen fabric and
  • Figure 2: a two-layer screen fabric.

    • In beiden Fällen besteht das Siebgewebe aus miteinander verwobenen in Laufrichtung 1 ausgerichteten Längsfäden 2 und quer dazu verlaufenden Querfäden 3. Während in Figur 1 jeweils eine Lage von Längsfäden 2 und Querfäden 3 miteinander verwoben ist, sind es jedoch in Figur 2 jeweils zwei Lagen.In both cases, the screen fabric consists of interwoven in the running direction 1 aligned longitudinal threads 2 and transverse threads 3 running transversely thereto. While in 1 a layer of longitudinal threads 2 and transverse threads 3 is interwoven, however, there are two layers in FIG. 2.

    Gemeinsam ist dabei, daß zumindest ein Teil der Querfäden 3 einen etwa tropfenförmigen oder im wesentlichen dreiseitigen, spitzwinkligen Querschnitt besitzt, wobei das spitze Ende 4 etwa in Laufrichtung 1 des Siebgewebes ausgerichtet ist. Des weiteren liegt der Winkel zwischen der Winkelhalbierenden 5 des spitzen Ende 4 des jeweiligen Querschnitts und der von der Faserstoffbahn 6 berührten Oberfläche des Siebgewebes zwischen 2 ° und 70 °, vorzugsweise zwischen 5 ° und 40 °. Außerdem verläuft die der Faserstoffbahn 6 zugewandte Seite der Querfäden 3 etwa parallel zur Faserstoffbahn 6. Hierdurch wird erreicht, daß die Luft im wesentlichen Umfang aufgrund des Laufs des Siebgewebes von der Faserstoffbahn 6 weggeleitet wird. Im Ergebnis stellt sich nach den Querfäden 3 ein Unterdruck ein, der die Haftung der Faserstoffbahn 6 am Siebgewebe verbessert. Die Längsfäden 2 haben in beiden Fällen einen runden Querschnitt.It is common that at least some of the transverse threads 3 have an approximately has a drop-shaped or essentially triangular, acute-angled cross-section, the pointed end 4 is aligned approximately in the running direction 1 of the screen fabric. Of further lies the angle between the bisector 5 of the pointed end 4 of the respective cross section and the surface of the fibrous web 6 touched Sieve cloth between 2 ° and 70 °, preferably between 5 ° and 40 °. Furthermore the side of the transverse threads 3 facing the fibrous web 6 runs approximately parallel to the Fibrous web 6. This ensures that the air is substantially is guided away from the fibrous web 6 due to the running of the screen fabric. in the The result is a negative pressure after the transverse threads 3, which the liability of Fiber web 6 improved on the screen fabric. The longitudinal threads 2 have in both cases a round cross section.

    In Figur 2 wird die Möglichkeit gezeigt, daß im wesentlichen nur die Querfäden 3 im Bereich der von der Faserstoffbahn 6 berührten Oberfläche des Siebgewebes einen tropfenförmigen oder im wesentlichen dreiseitigen, spitzwinkligen Querschnitt aufweisen. Die anderen Querfäden 3 besitzen hierbei einen in Laufrichtung 1 orientierten, flachen Querschnitt.In Figure 2, the possibility is shown that essentially only the transverse threads 3 in Area of the surface of the screen fabric touched by the fibrous web 6 teardrop-shaped or essentially triangular, acute-angled cross-section exhibit. The other transverse threads 3 have one in the running direction 1 oriented, flat cross section.

    Zur Formgebung können die Querfäden 3 durch den Preßspalt zweier Walzen geführt werden, wobei zumindest eine Walze eine entsprechende in Umfangsrichtung verlaufende Rille besitzt. Diese Rille kann ein sich entlang des Umfangs der Walze veränderndes Profil besitzen, was sich entsprechend auf den Querschnittsverlauf des Querfadens 3 auswirkt. For shaping, the transverse threads 3 can be guided through the press nip of two rollers be, with at least one roller corresponding in the circumferential direction running groove. This groove can extend along the circumference of the roller have a changing profile, which corresponds to the cross-sectional profile of the Cross thread 3 affects.

    Während die Querfäden 3 in Figur 1 einen im wesentlichen dreiseitigen, spitzwinkligen Querschnitt mit abgerundeten Ecken aufweisen, ist in Figur 2 ein etwa tropfenförmiger Querschnitt des Querfadens 3 dargestellt.While the transverse threads 3 in FIG. 1 have an essentially three-sided, acute-angled one Have cross-section with rounded corners, is an approximately drop-shaped in Figure 2 Cross section of the transverse thread 3 shown.

    Außerdem kann das Siebgewebe auch mehr als zwei Lagen von Längsfäden 2 und Querfäden 3 haben.In addition, the screen fabric can also have more than two layers of longitudinal threads 2 and Have cross threads 3.

    Claims (8)

    Siebgewebe für eine Maschine zur Herstellung und/oder Veredelung einer Faserstoffbahn (6), insbesondere einer Papier-, Karton- oder Tissuebahn bestehend aus zumindest je einer Lage von miteinander verwobenen in Laufrichtung (1) ausgerichteten Längsfäden (2) und quer dazu verlaufenden Querfäden (3), dadurch gekennzeichnet, daß
    zumindest ein Teil der Querfäden (3) einen etwa tropfenförmigen oder im wesentlichen dreiseitigen, spitzwinkligen Querschnitt besitzt, wobei das spitze Ende (4) etwa in Laufrichtung (1) des Siebgewebes ausgerichtet ist.    Screen fabric for a machine for producing and / or finishing a fibrous web (6), in particular a paper, cardboard or tissue web, consisting of at least one layer of interwoven longitudinal threads (2) aligned in the running direction (1) and transverse threads running transversely thereto ( 3), characterized in that
    at least some of the transverse threads (3) have an approximately teardrop-shaped or essentially three-sided, acute-angled cross-section, the pointed end (4) being oriented approximately in the running direction (1) of the screen fabric.         Siebgewebe nach Anspruch 1, dadurch gekennzeichnet, daß
    der Winkel zwischen der Winkelhalbierenden (5) des spitzen Endes (4) des jeweiligen Querschnitts und der von der Faserstoffbahn (6) berührten Oberfläche des Siebgewebes zwischen 2 ° und 70 °, vorzugsweise zwischen 5 ° und 40 ° liegt.    Screen fabric according to claim 1, characterized in that
    the angle between the bisector (5) of the pointed end (4) of the respective cross section and the surface of the screen fabric touched by the fibrous web (6) is between 2 ° and 70 °, preferably between 5 ° and 40 °.         Siebgewebe nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß
    die der Faserstoffbahn (6) zugewandte Seite des Querfadens (3) etwa parallel zur Faserstoffbahn (6) verläuft oder zu dieser in der Form geneigt ist, daß sich der Abstand zwischen beiden entgegen der Laufrichtung (1) des Siebgewebes vergrößert.    Screen fabric according to claim 1 or 2, characterized in that
    the side of the transverse thread (3) facing the fibrous web (6) runs approximately parallel to the fibrous web (6) or is inclined to it in such a way that the distance between the two increases counter to the running direction (1) of the screen fabric.         Siebgewebe nach einem der vorhergehenden Anprüche, dadurch gekennzeichnet, daß
    im wesentlichen nur die Querfäden (3) im Bereich der von der Faserstoffbahn (6) berührten Oberfläche des Siebgewebes einen tropfenförmigen oder im wesentlichen dreiseitigen, spitzwinkligen Querschnitt aufweisen.    Screen fabric according to one of the preceding claims, characterized in that
    essentially only the transverse threads (3) have a teardrop-shaped or essentially three-sided, acute-angled cross-section in the area of the surface of the screen fabric which is touched by the fibrous web (6).         Siebgewebe nach Anspruch 4, dadurch gekennzeichnet, daß
    die Querfäden (3) im Bereich der nicht von der Faserstoffbahn (6) berührten Oberfläche des Siebgewebes einen flachen Querschnitt besitzen und vorzugsweise etwa in Laufrichtung (1) orientiert sind.    Screen fabric according to claim 4, characterized in that
    the transverse threads (3) have a flat cross section in the area of the surface of the screen fabric that is not touched by the fibrous web (6) and are preferably oriented approximately in the running direction (1).         Siebgewebe nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß
    alle Querfäden (3) einen etwa tropfenförmigen oder im wesentlichen dreiseitigen, spitzwinkligen Querschnitt aufweisen.    Screen fabric according to one of claims 1 to 3, characterized in that
    all transverse threads (3) have an approximately teardrop-shaped or essentially three-sided, acute-angled cross-section.         Siebgewebe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß
    die Längsfäden (2) flach oder rund sind.    Screen fabric according to one of the preceding claims, characterized in that
    the longitudinal threads (2) are flat or round.         Verwendung des Siebgewebes nach einem der vorhergehenden Ansprüche in einem Former, in einer Pressenpartie oder in einer Trockenpartie einer Papiermaschine.Use of the screen fabric according to one of the preceding claims in a former, in a press section or in a dryer section Paper machine.
    EP19990106724 1998-04-17 1999-04-01 Screen-cloth Expired - Lifetime EP0950739B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE1998117050 DE19817050A1 (en) 1998-04-17 1998-04-17 Screen mesh
    DE19817050 1998-04-17

    Publications (3)

    Publication Number Publication Date
    EP0950739A2 true EP0950739A2 (en) 1999-10-20
    EP0950739A3 EP0950739A3 (en) 1999-11-17
    EP0950739B1 EP0950739B1 (en) 2003-02-19

    Family

    ID=7864837

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP19990106724 Expired - Lifetime EP0950739B1 (en) 1998-04-17 1999-04-01 Screen-cloth

    Country Status (4)

    Country Link
    US (1) US6265331B1 (en)
    EP (1) EP0950739B1 (en)
    CA (1) CA2269183A1 (en)
    DE (2) DE19817050A1 (en)

    Families Citing this family (2)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US7604026B2 (en) * 2006-12-15 2009-10-20 Albany International Corp. Triangular weft for TAD fabrics
    DE102015005160B4 (en) * 2015-04-16 2019-04-18 Saint-Gobain Adfors Method and device for producing yarn layers

    Citations (7)

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    FR2487876A1 (en) * 1980-08-04 1982-02-05 Schoeller Dueren Metalltuch Fourdrinier twill wire screen - incorporates weave which give minimal paper surface marking for high quality paper prodn.
    GB2157328A (en) * 1984-04-12 1985-10-23 Jwi Ltd Improved multilayer forming fabric
    EP0269070A2 (en) * 1986-11-28 1988-06-01 JWI Ltd. Composite forming fabric
    DE9211776U1 (en) * 1992-09-02 1992-11-12 Wuerttembergische Filztuchfabrik D. Geschmay Gmbh, 7320 Goeppingen, De
    DE4141139A1 (en) * 1991-12-13 1993-06-17 Voith Gmbh J M Woven paper-making blanket - is of monofilaments with a trapezoid cross=section in at least one group for wefts and warps
    US5429686A (en) * 1994-04-12 1995-07-04 Lindsay Wire, Inc. Apparatus for making soft tissue products
    US5651394A (en) * 1996-02-02 1997-07-29 Huyck Licensco, Inc. Papermakers fabric having cabled monofilament oval-shaped yarns

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    Publication number Priority date Publication date Assignee Title
    FI83673C (en) * 1989-10-09 1991-08-12 Tamfelt Oy Ab GARN FOER ANVAENDNING VID EN FRAMSTAELLNING AV EN TORKDUK FOER ANVAENDNING I EN PAPPERSMASKIN ELLER LIKNANDE.
    US5023132A (en) * 1990-04-03 1991-06-11 Mount Vernon Mills, Inc. Press felt for use in papermaking machine
    US5449548A (en) * 1994-11-28 1995-09-12 Bowen, Jr.; David Table, reduced permeability papermaker's fabrics containing fibers with fins designed to distort at lower force levels by having a reduced cross sectional area within the fin

    Patent Citations (7)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    FR2487876A1 (en) * 1980-08-04 1982-02-05 Schoeller Dueren Metalltuch Fourdrinier twill wire screen - incorporates weave which give minimal paper surface marking for high quality paper prodn.
    GB2157328A (en) * 1984-04-12 1985-10-23 Jwi Ltd Improved multilayer forming fabric
    EP0269070A2 (en) * 1986-11-28 1988-06-01 JWI Ltd. Composite forming fabric
    DE4141139A1 (en) * 1991-12-13 1993-06-17 Voith Gmbh J M Woven paper-making blanket - is of monofilaments with a trapezoid cross=section in at least one group for wefts and warps
    DE9211776U1 (en) * 1992-09-02 1992-11-12 Wuerttembergische Filztuchfabrik D. Geschmay Gmbh, 7320 Goeppingen, De
    US5429686A (en) * 1994-04-12 1995-07-04 Lindsay Wire, Inc. Apparatus for making soft tissue products
    US5651394A (en) * 1996-02-02 1997-07-29 Huyck Licensco, Inc. Papermakers fabric having cabled monofilament oval-shaped yarns

    Also Published As

    Publication number Publication date
    US6265331B1 (en) 2001-07-24
    EP0950739A3 (en) 1999-11-17
    CA2269183A1 (en) 1999-10-17
    EP0950739B1 (en) 2003-02-19
    DE19817050A1 (en) 1999-10-21
    DE59904307D1 (en) 2003-03-27

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