EP1731664A1 - Formiergewebe mit drei Lagen von Schussfäden - Google Patents

Formiergewebe mit drei Lagen von Schussfäden Download PDF

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Publication number
EP1731664A1
EP1731664A1 EP06111314A EP06111314A EP1731664A1 EP 1731664 A1 EP1731664 A1 EP 1731664A1 EP 06111314 A EP06111314 A EP 06111314A EP 06111314 A EP06111314 A EP 06111314A EP 1731664 A1 EP1731664 A1 EP 1731664A1
Authority
EP
European Patent Office
Prior art keywords
weft
warp
fabric
yarn
papermaking
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.)
Withdrawn
Application number
EP06111314A
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English (en)
French (fr)
Inventor
Scott D. Quigley
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 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 Patent GmbH filed Critical Voith Patent GmbH
Publication of EP1731664A1 publication Critical patent/EP1731664A1/de
Withdrawn legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/0027—Screen-cloths
    • D21F1/0036—Multi-layer screen-cloths
    • D21F1/0045—Triple layer fabrics

Definitions

  • the invention relates to a fabric used in papermaking. More specifically, the present invention relates to forming fabrics used in the forming section of a papermaking machine.
  • the initial introduction of the slurry is at the portion of a papermaking machine known as the wet end.
  • the slurry, or fiber suspension is initially dewatered when the slurry is introduced onto a moving forming fabric, in the forming section of the papermaking machine. Varying amounts of water is removed from the slurry through the forming fabric, resulting in the formation of a fibrous web on the surface of the forming fabric.
  • Forming fabrics address not only the dewatering of the slurry, but also the sheet formation, and therefore the sheet quality, resulting from the formation of the fibrous web. More specifically, the forming fabric must simultaneously control the rate of drainage while preventing fiber and other solid components contained in the slurry from passing through the fabric with the water. The role of the forming fabric also includes conveyance of the fibrous web to the press section of the papermaking machine.
  • Controlling drainage by way of fabric void volume is one of the fabric design criteria.
  • Forming fabrics have been produced to meet the needs and requirements of the various papermaking machines for the various paper grades being manufactured. As the needs arises to increase production speed of the papermaking machines and the quality of the paper being produced, the need for improved paper machine clothing allowing for increase production rates and improved quality resulted.
  • the present invention is for a fabric used in papermaking, and more particularly, as a forming fabric.
  • the fabric is a hybrid warp exchange triple layer forming fabric.
  • the fabric has a first weft system, a second weft system and a third weft system, the second weft system between the first and third weft systems.
  • the second and third weft systems are preferably in the same plane.
  • the fabric also has a plurality of warp systems, each warp system having at least one warp yarn. Each warp yarn binds with one of the first weft system, the third weft system, the first and second weft systems, and the second and third weft systems.
  • a first warp system is an exchange warp system.
  • machine direction (MD) yarns are warp yarns
  • CMD cross machine direction
  • a weft system is a system of wefts that performs a function.
  • the first weft system can be a paper side weft, a wear side weft or and intermediate weft.
  • the intermediate weft acts as a binding layer.
  • the mesh density of the first weft system and the second weft system is independent from the mesh density of the third weft system and the second weft system.
  • first weft system has a first yarn, the first yarn having a first diameter.
  • second weft system has a second yarn, the second yarn having a second diameter
  • third weft system has a third yarn, the third yarn having a third diameter.
  • the weft and warp yarn materials include, but are not limited to mono filament yarns, synthetic or polyester mono filament yarns, twisted mono filament yarns, twisted synthetic or twisted polyester or twisted polyamide mono filament yarns, twisted multi-filament yarns, twisted synthetic or twisted polyester multi-filament yarns, and others.
  • yarn profiles can be employed, including but not limited to yarns having a circular cross sectional shape with one or more diameters, or other cross sectional shapes, for example, non-round cross sectional shapes such as oval, or a polygonal cross sectional shapes, for example diamond, square, pentagonal, hexagonal, septagonal, octagonal, and so forth, or any other shape that the yarns may be fabricated.
  • each warp system can be independent.
  • Each warp layer has at least one warp yarn, and the at least one warp yarn has a fourth diameter.
  • each warp system has a predetermined number of warp repeats, ranging from 2 - 112, preferably 2 - 28.
  • the triple layer forming fabric of the present invention has exchange warps that do not bind with larger diameter bottom wefts. Rather, they bind with a smaller diameter intermediate weft. All of the warp yarns can be the same diameter or there can be two different warp yarn diameters. In contrast, the warp yarns in the prior art fabrics must all be of the same diameter.
  • the exchange points can be spread out farther than the prior art, resulting in a less obvious pattern. This can be done because the bottom warps bind with the intermediate wefts between the exchanges.
  • the warp that weaves only on the bottom, or wear side of the fabric can be of a larger diameter than those that weave on the top, or paper side of the fabric. In this manner the modulus of the fabric is enhanced, and allows for larger diameter bottom wefts to be employed.
  • the fabric has a first weft system, a second weft system and a third weft system, the second weft system between the first and third weft systems.
  • the fabric also has a plurality of warp systems, each warp system having at least one warp yarn. Each warp yarn binds with one of the second weft system and one of the first and third weft systems.
  • Figs. 1A-1 B depict a cross-sectional view of a triple layer fabric having a 2:1 warp ratio and a two shed / three shed arrangement according to the present invention
  • Fig. 2 depicts a forming side plan view of a triple layer fabric having a 2:1 warp ratio and a two / three shed arrangement according to the present invention
  • Figs. 3A-3B depict a cross-sectional view of a triple layer fabric having a 2:1 warp ratio and a three shed / three shed arrangement according to the present invention
  • Fig. 4 depicts a forming side plan view of a triple layer fabric having a 2:1 warp ratio and a three / three shed arrangement according to the present invention
  • Figs. 5A-5C depict a cross-sectional view of a triple layer fabric having a 2:1 warp ratio and a two shed / four shed arrangement according to the present invention
  • Fig. 6 depicts a forming side plan view of a triple layer fabric having a 2:1 warp ratio and a two shed / four shed arrangement according to the present invention
  • Figs. 7A-7C depict a cross-sectional view of a triple layer fabric having a 2:1 warp ratio and a two shed / six shed arrangement according to the present invention.
  • Fig. 8 depicts a forming side plan view of a triple layer fabric having a 2:1 warp ratio and a two shed / six shed arrangement according to the present invention.
  • Figs. 1A-1 B depict a cross-sectional view of a triple layer fabric 10 having a 2:1 warp ratio and a two shed / three shed arrangement according to the present invention, fabricated on a two beam loom.
  • Fig. 2 depicts the forming side plan view of the same fabric 10.
  • a first weft system 12 is shown above a second weft system 14.
  • the first and second weft systems 12, 14 are shown above a third weft system 16.
  • Each weft system 12, 14, 16 is made up of a plurality of yarns 18, 20, 22.
  • First weft yarn 18 has a first yarn diameter
  • second weft yarn 20 has a second yarn diameter
  • third weft yarn 22 has a third yarn diameter.
  • the first, second and third yarn diameters 18, 20, 22 can be the same or different. Different size numerals for each of the different weft layer yarns 18, 20, 22 is indicative of a different weft yarn diameter in the preferred embodiment.
  • the first, second and third weft systems 12, 14, 16 are bound together by a plurality of warp systems 24.
  • Figs 1A-1 B show fifteen warp systems 24 in a repeating pattern.
  • Each warp system 24 has at least one warp yarn 26, and each warp yarn 26 is woven in a two shed / three shed repetition.
  • the weft and warp yarn materials include, but are not limited to mono filament yarns, synthetic or polyester mono filament yarns, twisted mono filament yarns, twisted synthetic or twisted polyester or twisted polyamide mono filament yarns, twisted multi-filament yarns, twisted synthetic or twisted polyester multi-filament yarns, and others.
  • Various yarn profiles can be employed, including but not limited to yarns having a circular cross sectional shape with one or more diameters, or other cross sectional shapes, for example, non-round cross sectional shapes such as oval, or a polygonal cross sectional shapes, for example diamond, square, pentagonal, hexagonal, septagonal, octagonal, and so forth, or any other shape that the yarns may be fabricated into.
  • This first warp yarn 26 binds the top, or first weft 12 with the middle, or second weft 14.
  • a second warp yarn 30 also binds the top, or first weft 12 with the middle, or second weft 14.
  • the first and second warp yearns 26, 30 form what is called an exchange warp.
  • An exchange warp is, for example, when one member of a pair of warp yarns 26, 30 is weaving with the first weft system 12 and the other member of the pair of warp yarns 26, 30 is weaving with the second weft system 14.
  • an exchange warp allows for one warp yarn of a pair of warp yarns to weave in alternate fashion such that when the first warp yarn 26 is weaving with a first weft system 12, the second warp yarn 30 is not weaving with the first weft system 12, and both the first and the second warp yarns are not weaving the same weft at the same time.
  • the first warp yarn 26 and the second warp yarn 30 form the first warp system 28, which is an exchange warp pair.
  • warp yarn 32 forms a second warp system 34. Accordingly, warp yarn 32 does not cross the second warp yarn 30 of the first warp system 28, and no exchange warp is formed.
  • Fig. 2 depicts the forming side plan view of the triple layer fabric 10 having a 2:1 warp ratio and a two shed / three shed arrangement according to the present invention.
  • first and second warp yarns 26, 30 form a first warp system, and therefore a warp pair that forms an exchange warp.
  • the third warp yarn 32 since it only binds the second weft system 14 with the third weft system 16, does not appear in the forming side plan view.
  • the boxes with forward slash fill denote where warps exchange, and boxes with grey fill denote locations of bottom side warp knuckles. Since the invention is directed to a triple layer fabric, the weave has a separate forming or paper side and a wear side.
  • a fourth warp yarn 36 forms an exchange warp with a fifth warp yarn 38.
  • a sixth warp yarn 40 forms a warp exchange with a seventh warp yarn 42.
  • An eighth warp yarn 44 does not form an exchange warp with another yarn.
  • Figs. 1A-1 B further show a ninth warp yarn 46, a tenth warp yarn 48, and eleventh warp yarn 50, a twelfth warp yarn 52, and thirteenth warp yarn 54, a fourteenth warp yarn 56, and a fifteenth warp yarn 58. Accordingly, Fig. 2 depicts fifteen warp repeats, with six pairs of exchanging warps and 3 bottom warps.
  • the pattern repeats in both the forming side and the wear side layers.
  • the double forward slashed areas in Fig. 2 show the crossover points of the warp exchange yarns below the forming side surface.
  • the single grey areas in Fig. 2 show the warp yarn exposure on the wear side, that is, a wear side knuckle, not shown.
  • FIGs. 1A-1 B and 2 show one complete pattern in the machine direction.
  • Figs. 3A-3B depict a cross-sectional view of a triple layer fabric having a 2:1 warp ratio and a three shed / three shed arrangement according to the present invention.
  • Fig. 4 depicts the forming side plan view of the triple layer fabric having a 2:1 warp ratio and a three shed / three shed arrangement according to the present invention.
  • the first warp yarn 26 forms an exchange warps with the second warp yarn 30. The difference is that the first and second warp yarns 26, 30 have a three shed weave pattern.
  • Figs. 5A-5C depict a cross-sectional view of a triple layer fabric having a 2:1 warp ratio and a two shed / four shed arrangement according to the present invention
  • Fig. 6 depicts the forming side plan view.
  • Twenty-four warp yarns are shown as 118, 120, 122, 124, 126, 128, 130, 132, 134, 136, 138, 140, 142, 144, 148, 150, 152, 154, 156, 158, 160, 162 and 164.
  • an additional warp is added that only binds to the top, or first weft system 112, and does not bind with the second or third weft systems 114, 116.
  • top binding only warps are designated 118, 126, 134, 142, 150 and 158.
  • the boxes in Fig. 6 with the reverse hash fill indicate locations where the bottom warp binds with the binding weft, or the second weft system.
  • Figs. 7A-7C depict a cross-sectional view of a triple layer fabric having a 2:1 warp ratio and a two shed / six shed arrangement according to the present invention
  • Fig. 8 depicts the forming side plan view.
  • Twenty-four warp yarns are shown as 218, 220, 222, 224, 226, 228, 230, 232, 234, 236, 238, 240, 242, 244, 246, 248, 250, 252, 254, 256, 258, 260, 262 and 264.
  • the fabric 10 is woven using a three beam configuration, and has a different weave pattern than that depicted in Figs. 5-6.
  • This pattern shown in Fig. 8 has the additional notation of boxes containing horizontal or vertical fill lines, representing locations where an exchanging warp binds at the second weft layer according to the cross-sectional view of Figs. 7A-7C.
  • the invention has been described that can be fabricated on a three beam loom.
  • the triple layer fabric of the present invention can also be fabricated on a four beam loom.
  • Use of four beams could result in similar fabrics, with the addition of at least one of a top only warp, a bottom only warp, a bottom warp that binds at the second weft system, and a top pair that binds with the second weft system.

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  • Woven Fabrics (AREA)
EP06111314A 2005-06-08 2006-03-17 Formiergewebe mit drei Lagen von Schussfäden Withdrawn EP1731664A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11/148,777 US20060278294A1 (en) 2005-06-08 2005-06-08 Hybrid warp exchange triple layer forming fabric

Publications (1)

Publication Number Publication Date
EP1731664A1 true EP1731664A1 (de) 2006-12-13

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Family Applications (1)

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EP06111314A Withdrawn EP1731664A1 (de) 2005-06-08 2006-03-17 Formiergewebe mit drei Lagen von Schussfäden

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US (1) US20060278294A1 (de)
EP (1) EP1731664A1 (de)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7059359B2 (en) * 2003-05-22 2006-06-13 Voith Fabrics Warp bound composite papermaking fabric
JP4762529B2 (ja) * 2004-11-17 2011-08-31 日本フイルコン株式会社 工業用二層織物
WO2006121834A2 (en) * 2005-05-05 2006-11-16 Astenjohnson, Inc. Bulk enhancing forming fabrics
US7743795B2 (en) 2006-12-22 2010-06-29 Voith Patent Gmbh Forming fabric having binding weft yarns
US7604025B2 (en) * 2006-12-22 2009-10-20 Voith Patent Gmbh Forming fabric having offset binding warps
US20080196784A1 (en) * 2007-02-15 2008-08-21 Scott Quigley Wear side weave pattern of a composite forming fabric
US7879194B2 (en) * 2007-09-06 2011-02-01 Voith Patent Gmbh Structured forming fabric and method
US7879193B2 (en) * 2007-09-06 2011-02-01 Voith Patent Gmbh Structured forming fabric and method
US7879195B2 (en) * 2007-09-06 2011-02-01 Voith Patent Gmbh Structured forming fabric and method
US7878224B2 (en) * 2008-02-19 2011-02-01 Voith Patent Gmbh Forming fabric having binding warp yarns
US7861747B2 (en) * 2008-02-19 2011-01-04 Voith Patent Gmbh Forming fabric having exchanging and/or binding warp yarns
CA2622653A1 (en) * 2008-02-22 2009-08-22 Roger Danby Triple weft layer double wrap industrial filtration fabric
US8002950B2 (en) * 2008-06-11 2011-08-23 Voith Patent Gmbh Structured fabric for papermaking and method
BR122021012179B1 (pt) 2013-11-14 2022-09-20 Gpcp Ip Holdings Llc Métodos para preparar um produto de papel, e máquinas de fabricação de papel para fabricar um produto de papel
US11339534B2 (en) 2019-09-18 2022-05-24 Huyck Licensco Inc. Multi-layer warp bound papermaker's forming fabrics

Citations (4)

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Publication number Priority date Publication date Assignee Title
DE3225599A1 (de) * 1982-07-08 1984-01-12 Hermann Wangner Gmbh & Co Kg, 7410 Reutlingen Verbund-gewebe als bespannung fuer den blattbildungsbereich einer papiermaschine
US4640741A (en) * 1983-11-30 1987-02-03 Nippon Filcon Co., Ltd. Forming fabric for use in a papermaking machine
US4739803A (en) * 1986-05-06 1988-04-26 Hermann Wangner Gmbh & Co., Kg Fabric for the sheet forming section of a papermaking machine
US4934414A (en) * 1988-01-15 1990-06-19 Hermann Wangner Gmbh & Co., Kg Double-layer papermaking fabric

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US5343896A (en) * 1990-06-06 1994-09-06 Asten Group, Inc. Papermakers fabric having stacked machine direction yarns
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JP3474042B2 (ja) * 1995-10-05 2003-12-08 日本フイルコン株式会社 製紙面側織物に補助緯糸を配置した製紙用２層織物
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GB9924012D0 (en) * 1999-10-12 1999-12-15 Stone Richard Forming fabric woven with warp triplets
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US6834684B2 (en) * 2002-10-24 2004-12-28 Albany International Corp. Paired warp triple layer forming fabrics with optimum sheet building characteristics
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Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3225599A1 (de) * 1982-07-08 1984-01-12 Hermann Wangner Gmbh & Co Kg, 7410 Reutlingen Verbund-gewebe als bespannung fuer den blattbildungsbereich einer papiermaschine
US4640741A (en) * 1983-11-30 1987-02-03 Nippon Filcon Co., Ltd. Forming fabric for use in a papermaking machine
US4739803A (en) * 1986-05-06 1988-04-26 Hermann Wangner Gmbh & Co., Kg Fabric for the sheet forming section of a papermaking machine
US4934414A (en) * 1988-01-15 1990-06-19 Hermann Wangner Gmbh & Co., Kg Double-layer papermaking fabric

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