EP0950739B1 - Toile pour tamis - Google Patents

Toile pour tamis Download PDF

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Publication number
EP0950739B1
EP0950739B1 EP19990106724 EP99106724A EP0950739B1 EP 0950739 B1 EP0950739 B1 EP 0950739B1 EP 19990106724 EP19990106724 EP 19990106724 EP 99106724 A EP99106724 A EP 99106724A EP 0950739 B1 EP0950739 B1 EP 0950739B1
Authority
EP
European Patent Office
Prior art keywords
cross
section
fabric
fibrous web
transverse
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 - Lifetime
Application number
EP19990106724
Other languages
German (de)
English (en)
Other versions
EP0950739A3 (fr
EP0950739A2 (fr
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 Paper 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.)
Filing date
Publication date
Application filed by Voith Paper Patent GmbH filed Critical Voith Paper Patent GmbH
Publication of EP0950739A2 publication Critical patent/EP0950739A2/fr
Publication of EP0950739A3 publication Critical patent/EP0950739A3/fr
Application granted granted Critical
Publication of EP0950739B1 publication Critical patent/EP0950739B1/fr
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 Refining 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 have a 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 wire running along the cross thread is generated because of the 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 °. there 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.
  • 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. 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.
  • 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.
  • a negative pressure 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Paper (AREA)
  • Absorbent Articles And Supports Therefor (AREA)

Claims (8)

  1. Toile pour tamis pour une machine de fabrication et/ou d'amélioration d'une bande fibreuse (6), en particulier d'une bande de papier, de carton ou de tissu, se composant d'au moins à chaque fois une couche de fils longitudinaux (2) orientés dans la direction d'avance (1) et de fils transversaux (3) s'étendant transversalement à ceux-ci, tissés ensemble, caractérisée en ce que
    au moins une partie des fils transversaux (3) possède une section transversale approximativement en forme de goutte ou essentiellement à trois côtés, à angles aigus, l'extrémité pointue (4) étant orientée approximativement dans la direction d'avance (1) de la toile pour tamis.
  2. Toile pour tamis selon la revendication 1,
    caractérisée en ce que
    l'angle entre les bissectrices (5) de l'extrémité pointue (4) de la section transversale respective et de la surface de la toile pour tamis en contact avec la bande fibreuse (6) est compris entre 2° et 70°, de préférence entre 5° et 40°.
  3. Toile pour tamis selon la revendication 1 ou 2,
    caractérisée en ce que
    le côté du fil transversal (3) tourné vers la bande fibreuse (6) s'étend approximativement parallèlement à la bande fibreuse (6) ou est incliné par rapport à celle-ci suivant une forme telle que la distance entre les deux augmente à l'encontre de la direction d'avance (1) de la toile pour tamis.
  4. Toile pour tamis selon l'une quelconque des revendications précédentes, caractérisée en ce que essentiellement seulement les fils transversaux (3) dans la région de la surface de la toile pour tamis en contact avec la bande fibreuse (6) présentent une section transversale en forme de goutte ou essentiellement à trois côtés, à angles aigus.
  5. Toile pour tamis selon la revendication 4,
    caractérisée en ce que
    les fils transversaux (3) dans la région de la surface de la toile pour tamis non en contact avec la bande fibreuse (6) possèdent une section transversale plate et sont de préférence orientés approximativement dans la direction d'avance (1).
  6. Toile pour tamis selon l'une quelconque des revendications 1 à 3, caractérisée en ce que
    tous les fils transversaux (3) présentent une section transversale approximativement en forme de goutte, ou essentiellement à trois côtés, à angles aigus.
  7. Toile pour tamis selon l'une quelconque des revendications précédentes, caractérisée en ce que les fils longitudinaux (2) sont plats ou ronds.
  8. Utilisation de la toile pour tamis selon l'une quelconque des revendications précédentes dans un formeur, dans une section de presse ou dans une section sèche d'une machine à papier.
EP19990106724 1998-04-17 1999-04-01 Toile pour tamis Expired - Lifetime EP0950739B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1998117050 DE19817050A1 (de) 1998-04-17 1998-04-17 Siebgewebe
DE19817050 1998-04-17

Publications (3)

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

Family

ID=7864837

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19990106724 Expired - Lifetime EP0950739B1 (fr) 1998-04-17 1999-04-01 Toile pour tamis

Country Status (4)

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

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 (de) * 2015-04-16 2019-04-18 Saint-Gobain Adfors Verfahren und Vorrichtung zum Herstellen von Fadengelegen

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2487876A1 (fr) * 1980-08-04 1982-02-05 Schoeller Dueren Metalltuch Tamis d'egouttage pour machine a papier
GB2157328A (en) * 1984-04-12 1985-10-23 Jwi Ltd Improved multilayer forming fabric
CA1277209C (fr) 1986-11-28 1990-12-04 Dale B. Johnson Faconnage d'un tissu composite
FI83673C (fi) * 1989-10-09 1991-08-12 Tamfelt Oy Ab Garn foer anvaendning vid 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
DE4141139C2 (de) * 1991-12-13 1995-08-31 Voith Gmbh J M Siebgewebe für eine Papiermaschine
DE9211776U1 (de) * 1992-09-02 1992-11-12 Württembergische Filztuchfabrik D. Geschmay GmbH, 7320 Göppingen Trockensieb
US5429686A (en) * 1994-04-12 1995-07-04 Lindsay Wire, Inc. Apparatus for making soft tissue products
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
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
DE59904307D1 (de) 2003-03-27
DE19817050A1 (de) 1999-10-21
EP0950739A3 (fr) 1999-11-17
US6265331B1 (en) 2001-07-24
CA2269183A1 (fr) 1999-10-17
EP0950739A2 (fr) 1999-10-20

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