EP0048962B1 - Tamis double pour la section de transformation en feuille d'une machine à papier - Google Patents

Tamis double pour la section de transformation en feuille d'une machine à papier Download PDF

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Publication number
EP0048962B1
EP0048962B1 EP81107606A EP81107606A EP0048962B1 EP 0048962 B1 EP0048962 B1 EP 0048962B1 EP 81107606 A EP81107606 A EP 81107606A EP 81107606 A EP81107606 A EP 81107606A EP 0048962 B1 EP0048962 B1 EP 0048962B1
Authority
EP
European Patent Office
Prior art keywords
warp
wires
weft
screen
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
Other languages
German (de)
English (en)
Other versions
EP0048962A3 (en
EP0048962B2 (fr
EP0048962A2 (fr
Inventor
Georg Borel
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.)
Herman Wangner GmbH and Co KG
Original Assignee
Herman Wangner GmbH and Co KG
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6112960&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0048962(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Herman Wangner GmbH and Co KG filed Critical Herman Wangner GmbH and Co KG
Priority to AT81107606T priority Critical patent/ATE6877T1/de
Publication of EP0048962A2 publication Critical patent/EP0048962A2/fr
Publication of EP0048962A3 publication Critical patent/EP0048962A3/de
Application granted granted Critical
Publication of EP0048962B1 publication Critical patent/EP0048962B1/fr
Publication of EP0048962B2 publication Critical patent/EP0048962B2/fr
Expired 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
    • 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 of warp threads, all of the warp threads being integrated in the upper layer of the sieve.
  • Such screens are known from DE-OS Nos. 2263476 and 2540490. With these sieves, all warp wires on the running side bind under the weft wires 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.
  • 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 and lower layers is 3: 1, 4: 1, etc.
  • the warp number of the upper layer used to form the paper web is preferably at least twice 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, i.e. large unbound lengths of the weft threads, so that the abrasion is distributed over a large thread volume.
  • 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 running time at full strength since they do not wear away are exposed.
  • the warp wires and the weft wires are generally formed by a plastic monofilament; polyester and polyamide monofilaments are particularly suitable.
  • the screens are generally flat-woven.
  • Another advantage of the screen according to the invention is that, due to 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 sieve 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 one. 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 absorb the wire tension when the warp and weft wires are already completely ground off on the running side (lower layer 6) of the wire.
  • 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 ensure good web acceptance achieve.
  • 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 1-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 much thicker weft wires, namely with a diameter of 0.27 mm polyester monofilament, with the possibility of alternately weaving polyester and polyamide monofilament 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.

Landscapes

  • Woven Fabrics (AREA)
  • Paper (AREA)

Claims (4)

1. Tamis à deux couches pour le système de formation de la feuille dans une machine à papier, ce tamis comportant des fils de trame, qui i sont tous superposés deux par deux, et des fils de chaîne qui sont entrelacés tous dans la couche supérieure du tamis, celui-ci étant caractérisé en ce qu'une partie seulement des fils de chaîne (les fils de chaîne de structure 1 ) sont également entrelacés dans la couche inférieure (6).
2. Tamis conforme à la revendication 1, caractérisé en ce que le nombre des fils de chaîne de la couche supérieure, destinée à la formation de la bande de papier, est au moins égal au double du nombre des fils de chaîne de la couche inférieure.
3. Tamis conforme à la revendication 1, caractérisé en ce que les fils de trame inférieurs (4) ont un calibre supérieur d'au moins 20%, et de préférence supérieur de 30%, à celui des fils de chaîne.
4. Tamis conforme à l'une des revendications 1 à 3, caractérisé en ce que, dans la couche inférieure (6), les coudes (8) des fils de chaîne également entrelacés dans cette couche (6) (fils de chaîne de structure 1 ) se trouvent constamment disposés deux par deux.
EP81107606A 1980-09-26 1981-09-24 Tamis double pour la section de transformation en feuille d'une machine à papier Expired EP0048962B2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81107606T ATE6877T1 (de) 1980-09-26 1981-09-24 Doppellagiges sieb fuer den blattbildungsteil einer papiermaschine.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3036409A DE3036409C2 (de) 1980-09-26 1980-09-26 Doppellagiges Sieb für den Siebteil einer Papiermaschine
DE3036409 1980-09-26

Publications (4)

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

Family

ID=6112960

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81107606A Expired EP0048962B2 (fr) 1980-09-26 1981-09-24 Tamis double pour la section de transformation en feuille d'une machine à papier

Country Status (12)

Country Link
US (1) US4499927A (fr)
EP (1) EP0048962B2 (fr)
JP (1) JPS5789696A (fr)
AR (1) AR226612A1 (fr)
AT (1) ATE6877T1 (fr)
BR (1) BR8106086A (fr)
CA (1) CA1159293A (fr)
DE (2) DE3036409C2 (fr)
ES (1) ES8308379A1 (fr)
FI (1) FI77705C (fr)
MX (1) MX158729A (fr)
NO (1) NO153616C (fr)

Families Citing this family (63)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3146385C2 (de) * 1981-11-23 1985-10-31 Hermann Wangner Gmbh & Co Kg, 7410 Reutlingen Doppellagiges Gewebe als Bespannung für Papiermaschinen
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SE441016B (sv) * 1982-04-26 1985-09-02 Nordiskafilt Ab Formeringsvira for pappers-, cellulosa- eller liknande maskiner
DE3307144A1 (de) * 1983-03-01 1984-09-13 Hermann Wangner Gmbh & Co Kg, 7410 Reutlingen Papiermaschinenbespannung in einer gewebebindung, die keine in laengsrichtung verlaufenden symmetrieachse aufweist
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
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US5114777B2 (en) * 1985-08-05 1997-11-18 Wangner Systems Corp Woven multilayer papermaking fabric having increased stability and permeability and method
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US4709732A (en) * 1986-05-13 1987-12-01 Huyck Corporation Fourteen harness dual layer weave
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DE3634649A1 (de) * 1986-10-10 1988-04-14 Wangner Gmbh Co Kg Hermann Bespannung fuer den blattbildungsteil einer papiermaschine mit zusaetzlichen, flottierenden querfaeden groesserer rapportlaenge
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JP2715097B2 (ja) * 1988-06-09 1998-02-16 日本フイルコン株式会社 緯糸摩耗型製紙用織物
JP2609134B2 (ja) * 1988-06-27 1997-05-14 日本フイルコン株式会社 製紙用二重織物
DE3823085A1 (de) * 1988-07-07 1990-01-11 Oberdorfer Fa F Doppelgewebe als siebgewebe fuer die nasspartie einer papiermaschine
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US5025839A (en) * 1990-03-29 1991-06-25 Asten Group, Inc. Two-ply papermakers forming fabric with zig-zagging MD yarns
FI85605C (fi) * 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 (fr) * 1991-07-29 1993-02-18 Jwi Ltd. Toile double couche resistant a l'usure et ne marquant pas
US5158117A (en) * 1991-07-30 1992-10-27 Tamfelt Oy Ab Two-layer paper machine cloth
JPH05277006A (ja) * 1992-04-01 1993-10-26 Yoshida Kogyo Kk <Ykk> 布 地
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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
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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.
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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
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JP4819477B2 (ja) * 2005-10-31 2011-11-24 日本フイルコン株式会社 工業用二層織物
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US20090183795A1 (en) 2008-01-23 2009-07-23 Kevin John Ward 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
JP5280160B2 (ja) * 2008-11-12 2013-09-04 日本フイルコン株式会社 絞り緯糸を配置した工業用多層織物
US8196613B2 (en) * 2009-02-25 2012-06-12 Kevin John Ward Multi-layer papermaker's forming fabric with paired MD binding yarns
US8251103B2 (en) 2009-11-04 2012-08-28 Weavexx Corporation Papermaker's forming fabric with engineered drainage channels
FI20115222L (fi) * 2011-03-04 2012-09-05 Metso Fabrics Oy Paperikonekudos
GB201315362D0 (en) * 2013-08-29 2013-10-09 Clear Edge Germany Gmbh Filter Element
GB201315363D0 (en) * 2013-08-29 2013-10-09 Clear Edge Germany Gmbh Filter element
US10953355B2 (en) 2013-08-29 2021-03-23 Clear Edge-Germany Gmbh Filter element
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Also Published As

Publication number Publication date
DE3162899D1 (en) 1984-05-03
NO813262L (no) 1982-03-29
US4499927A (en) 1985-02-19
JPH0214475B2 (fr) 1990-04-09
NO153616C (no) 1986-05-21
ES505626A0 (es) 1983-08-16
MX158729A (es) 1989-03-08
BR8106086A (pt) 1982-06-08
AR226612A1 (es) 1982-07-30
ATE6877T1 (de) 1984-04-15
FI77705B (fi) 1988-12-30
EP0048962A3 (en) 1982-06-23
FI77705C (fi) 1990-07-25
FI812994L (fi) 1982-03-27
EP0048962B2 (fr) 1988-03-16
DE3036409A1 (de) 1982-05-13
NO153616B (no) 1986-01-13
EP0048962A2 (fr) 1982-04-07
JPS5789696A (en) 1982-06-04
DE3036409C2 (de) 1983-01-20
ES8308379A1 (es) 1983-08-16
CA1159293A (fr) 1983-12-27

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