EP1788151B1 - Papiermaschinensieb - Google Patents

Papiermaschinensieb Download PDF

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Publication number
EP1788151B1
EP1788151B1 EP06122409A EP06122409A EP1788151B1 EP 1788151 B1 EP1788151 B1 EP 1788151B1 EP 06122409 A EP06122409 A EP 06122409A EP 06122409 A EP06122409 A EP 06122409A EP 1788151 B1 EP1788151 B1 EP 1788151B1
Authority
EP
European Patent Office
Prior art keywords
binding
yarns
yarn
sections
paper machine
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.)
Not-in-force
Application number
EP06122409A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1788151A1 (de
Inventor
Johann Boeck
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 EP1788151A1 publication Critical patent/EP1788151A1/de
Application granted granted Critical
Publication of EP1788151B1 publication Critical patent/EP1788151B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • D21F1/0045—Triple layer fabrics

Definitions

  • the invention relates to a papermaking wire, in particular a forming fabric, according to the preamble of patent claim 1.
  • Forming fabrics are used in the forming section of a paper machine.
  • a fiber suspension is applied from the headbox of the paper machine to a forming fabric or to two forming fabrics (Gap formers).
  • An object of the forming fabric here is to dewater the fiber suspension and form a fibrous web, as little as possible pulp fibers and fillers from the fiber suspension should be washed during the dewatering process.
  • the quality of the fibrous web formed is strongly influenced by the structure of the fibrous web-facing surface (paper side) of the forming fabric.
  • the life of the forming fabric is greatly affected by the structure of the paper machine facing surface (machine side) of the forming fabric.
  • the attachment sites In multi-ply fabrics where the fabric plies are held together by separate binding threads, i. due to binding threads, which do not form an integral part of the weave structure of at least the paper-side fabric layer, the attachment sites often cause indentations on the paper side which cause marks on the paper produced on such fabrics.
  • binding threads In multi-layer fabrics in which the binding threads an integral part of Web form, is provided by the binding threads often only low binding force between the fabric layers in favor of a planar as possible paper side.
  • the low connection between the fabric layers on the one hand results in a large thickness of the screen and on the other hand leads to a relative movement of the two fabric layers to each other in the operation of the screen.
  • the high thickness causes a high level of water dragging. Furthermore, a high sieve thickness increases the drainage resistance, which leads to poor drainage of the paper web, which has a disadvantageous effect particularly on fast paper machines, since the paper web at the end of the dewatering section has too high a water content.
  • Multilayer forming fabrics are, for example, from the EP 0 432 413 B1 , of the DE 297 24 238 U1 , of the EP 1 00 197 B1 , of the WO 2004 / 061211A2 and the US 2004/0149342 A1 known.
  • the still published document US2006 / 0169346 discloses a papermaker's fabric having upper and lower fabric layers bonded together by binding threads. According to D1, the binding threads form upper binding sections when woven with upper MD threads and lower binding sections when weaving with lower MD threads, each binding thread forming a lower binding section between successive upper binding sections.
  • WO2004 / 111333 a double-layered forming fabric in which the two fabric layers are connected to each other by binding threads.
  • binding threads which do not form a lower attachment section when interweaving with the transverse threads between two successive upper attachment sections.
  • the known papermaking fabric in particular Formiersieb, has an upper transverse yarns comprising upper fabric layer whose outer side forms a paper side of the papermaking fabric and a lower transverse threads comprising lower fabric layer whose outside forms a machine side of the papermachine fabric. Furthermore, the known papermachine fabric has binding yarns arranged in pairs and extending transversely of the transverse yarns, which join the upper and lower fabric layers together by forming the binding yarns of each pair with upper transverse yarns forming upper tie-up portions and lower transverse yarns forming lower tie-down portions are interwoven.
  • each upper attachment portion is formed by interweaving a binding thread of the pair with one or more successive upper transverse threads, wherein between two successive upper attachment portions of the binding thread, an upper attachment portion of the other binding thread of the pair is arranged. Further, at each upper attachment portion, a binder thread crosses at least one upper transverse thread as it threads on the outside of the upper fabric layer. At each lower attachment portion, a binder thread crosses at least one lower transverse thread as it travels on the outside of the lower fabric layer.
  • the screen has binding thread rapports in each of which the interweaving of the binding threads with upper and lower transverse threads is repeated, the upper attachment sections forming first attachment sections and second attachment sections, of which the second attachment sections comprise as many or more successive upper transverse threads as the first upper connecting sections and wherein successive second upper connecting sections formed by a binding thread of the pair are provided between in which the binding thread is not interwoven with lower transverse threads, and - with binding thread replicas in which the interweaving of the binding threads with upper transverse threads and lower transverse threads is repeated in each case, more than two successive upper attachment sections being arranged in each binding thread repeat.
  • the papermaking fabric according to the invention is characterized in that the weaving paths of the two binding threads of the group differ from one another only in that they are offset from one another by a number of upper transverse threads.
  • a low marking tendency of the paper side is further supported by the weave pattern of the upper fabric layer being a plain weave.
  • the weaving paths of the two binding threads of the pair differ from each other only in that they are offset from one another by a number of upper transverse threads, wherein preferably the weaving paths of the two binding threads of a pair are offset from one another by half of the binding thread repeat.
  • the advantage of this arrangement is that each binder thread of the pair in one half of the binder thread repeat weaves the weave path with the top and bottom cross threads weaving the other of the two binder threads in the other half of the binder thread repeat.
  • the second attachment portions comprise three successive upper transverse threads, wherein the binding thread on the outer side continuously crosses the first and the third of the upper transverse threads, and wherein the binding thread between the upper and lower fabric layers continuously crosses the second of the upper transverse threads.
  • the binding thread crosses between the upper and lower
  • Fabric layer running several, preferably three upper transverse threads. In this way, a floating of the binding thread between the upper and the lower fabric layer is provided, through which the wire is stiffened.
  • a first upper connection portion forms between the successive formed by the weaving of a binding thread second upper connecting portions of the other binding yarn of the pair by interweaving with at least one upper transverse thread, a first upper connection portion, wherein the first upper connection portion preferably disposed between lower connection portions is, which are formed by the same binder thread of the pair.
  • a fixed connection of the upper Fabric layer provided to the lower fabric layer through the binder thread Due to the floating of the other binding thread of the pair between the second upper attachment portions, the first upper attachment portion of the binding thread, which is disposed between the second upper attachment points of the other binding thread of the pair, is supported, whereby the first upper attachment portion is not pulled towards the lower fabric layer becomes.
  • the force for supporting the floatation is at least partially absorbed by the two second upper connecting sections. As a result, a firm connection between the two fabric layers is provided at the same time flat paper side.
  • first and second upper connection portions are formed, between which a lower connection portion is arranged.
  • first and second attachment portions formed by a binder thread are connected to each other via a lower connection portion, whereby a firm connection between the upper and lower fabric layer is achieved.
  • each lower attachment portion is formed by interweaving a binding thread with only a lower transverse thread.
  • a further particularly preferred development of the invention provides that when a binding thread of the pair interweaves with the formation of a second upper connecting portion with upper transverse threads, weaves the other binding thread of the pair to form a lower connection portion with at least one lower transverse threads, the upper transverse threads of the second upper connecting portion is arranged opposite.
  • the upper fabric layer is connected to the lower fabric layer via lower attachment portions through a first upper attachment portion of a binding thread disposed between two second upper attachment portions of the other binding thread connected, both of which are arranged under the second upper attachment portions of the other binding thread.
  • a preferred development of the invention provides that a binder thread repeat in which the weaving of a binding thread with upper and lower transverse threads repeats comprises 40 transverse threads.
  • the ratio of upper to lower transverse threads can be 1: 1.
  • the upper fabric layer may be formed by upper longitudinal threads extending in the binding yarn direction and woven only with upper transverse threads.
  • the lower fabric layer may also be formed by lower longitudinal threads extending in the binding thread direction, which are interwoven only with lower transverse threads.
  • a concrete embodiment of the invention provides that the transverse threads are warp threads and the binding threads or the longitudinal threads are weft threads.
  • FIG. 2 shows an entire repeat of an embodiment of a forming machine according to the invention as a papermaking fabric 100
  • the FIG. 1 represents a binding thread course of a binding thread pair of the screen 100.
  • the forming fabric 100 comprises an upper fabric layer 101 having an outer side 103 forming the paper side and a lower fabric layer 102 having an outer side 104 forming the machine side.
  • the upper fabric layer 101 is formed by interweaving pairs of binding yarns B1 to B20 with upper transverse yarns OK1, OK3, OK5, OK7, .... to OK39, and interweaving upper longitudinal yarns OS1 to OS10 with the upper one upper transverse threads OK1, OK3, OK5, OK7, .... to OK 39 formed (which in the FIG. 1 or 3 right-hand designations "OK” or "UK” should be used as a substitute for all upper or lower transverse threads).
  • the lower fabric layer 102 is formed by interweaving the paired binding yarns B1 to B20 with lower transverse threads UK2, UK4, UK6, UK8, ...., UK40 and interweaving lower longitudinal threads US1 to US20 with the lower transverse threads UK2 , UK4, UK6, UK8, ...., UK40.
  • a repeat unit of the embodiment according to the invention therefore comprises 20 binding threads, 30 upper and lower longitudinal threads and 40 upper and lower transverse threads.
  • the ratio of upper to lower transverse threads is 1: 1.
  • the weave pattern of the upper fabric layer 101 further forms a plain weave.
  • the invention is based essentially on the course of the binding threads B19 and B20 in the FIG. 1 or 2 will be explained.
  • binding threads B1 to B20 and the longitudinal threads OS1 to OS10 and US1 to US20 in this case extend transversely to the upper and lower transverse threads.
  • the upper fabric layer 101 and the lower Fabric layer 102 interconnected by the binding threads B19 and B20 of each pair with upper transverse threads OK1, OK3, OK5, OK7, .... to OK 39 to form upper attachment portions OA1 to OA6 and lower transverse threads UK2, UK4, UK6, UK8 , ...., UK40 are interwoven to form lower attachment portions UA1 to UA4, wherein each upper attachment portion OA1 to OA6 is formed by interweaving a binding thread B19, B20 of the pair with one or more successive upper transverse threads OK1, OK3, OK5, OK7 , ....
  • an upper attachment portion of the other binding thread of the pair is arranged.
  • the upper attachment section OA3 of the binding thread B20 is arranged.
  • An upper attachment section OA1 to OA6 is formed by a binding thread B19, B20 on the outer side 103 of the upper fabric layer 101 continuously crossing at least one of the upper transverse threads OK1, OK3, OK5, OK7, .... to OK 39.
  • the upper attachment portions OA2 and OA6 are formed by interweaving three successive upper transverse threads (OK7 to OK11 at OA2 and OK35 to OK39 at OA6) with the binder thread B19, the binder thread B19 at the outer side 103 of the upper fabric layer 101, the first and third of the upper transverse threads cross, and the binder thread B19 between the upper 101 and lower fabric layers 102 continuously crosses the second of the upper transverse threads.
  • the upper connection sections OA3 and OA5 are further characterized by the Weaving the binding thread B20 formed with three consecutive upper transverse threads (OK15 to OK19 at OA3 and OK27 to OK31 at OA5).
  • the upper attachment sections OA2, OA3, OA5 and OA6 represent second upper attachment sections.
  • first upper bonding portions OA1 and OA4 are formed by interweaving each upper transverse thread (OK3 at OA1 and OK23 at OA4) with the bonding yarns B20 and B19, respectively.
  • the weave pattern of the papermaker's fabric 100 repeats in a repeat OK1 to OK39 and UK2 to UK40 extending in the binder threading direction along the length of the repeat of the weaving path of one of the binding threads B19 or B20.
  • more than two upper connecting sections in each case six upper connecting sections OA1 to OA6, are arranged consecutively on the length of the repeat OK1 to OK39 and UK2 to UK40 in the direction of the binding thread
  • the forming fabric 100 further has lower attachment portions UA1 to UA4, wherein at each lower attachment portion UA1 to UA4, a binding thread B19, B20 crosses at least one lower transverse thread when the binding thread B19, B20 runs on the outer side 104 of the lower fabric layer 102.
  • the weaving paths of the two binding threads B19, B20 of the pair differ from each other only in that they are offset from each other by a number of upper transverse threads, namely the upper transverse threads OK5 to OK23, which corresponds to half of the binder thread repeat.
  • the forming fabric 100 has successive formed by a binder yarn of the pair second upper connecting portions, between which the binding yarn is not interwoven with lower transverse threads.
  • the binding thread B20 between the through The second upper joining portions OA3 and OA5 formed thereon are not interwoven with lower transverse threads UA, but rather, the binder thread B20 between the successive second upper joining portions OA3 and OA5 between the upper fabric layer 101 and lower fabric layer 102 continuously crosses the three successive upper transverse threads OK21 to OK25 ,
  • a first upper attachment portion formed by interweaving the other binding thread with an upper transverse thread of the pair is arranged between the successive second upper connecting sections OA3 and OA5 of the binding thread B20.
  • the first upper connecting section OA4 formed by interweaving the binding thread B19 with the upper transverse thread OK23 is arranged between the two second upper connecting sections OA3 and OA5 of the binding thread B20.
  • the forming fabric 100 comprises successively arranged first and second upper attachment portions of a binding thread, between which a lower attachment portion of the same binding thread is arranged.
  • the second upper attachment portion OA3 of the binding thread B20 follows the first binding thread portion OA1 of the binding thread B20, wherein the lower attachment portion UA1 of the binding thread B20 is arranged between the two upper attachment portions OA1 and OA3.
  • the forming fabric 100 further comprises successive lower attachment portions formed by a binder yarn of the pair, between which the binder yarn is interwoven with an upper transverse yarn to form a first upper attachment portion.
  • the first upper connection section OA4 of the binding thread B19 is arranged between the two lower attachment sections UA2 and UA3 of the binding thread B19, so that the first upper attachment section arranged between the two second upper attachment sections OA3 and OA5 is held on both sides by the lower attachment sections UA2 and UA3 becomes.
  • first and second upper connecting sections are provided which comprise the same number of upper transverse threads, namely three successive upper transverse threads.
  • the first upper attachment portions each comprise an upper transverse thread
  • the second upper attachment portions of each binding thread comprise three and five successive upper transverse threads.
  • first and second upper connecting sections are provided which comprise the same number of upper transverse threads, namely one upper transverse thread each.

Landscapes

  • Woven Fabrics (AREA)
  • Paper (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Storage Of Web-Like Or Filamentary Materials (AREA)
EP06122409A 2005-11-21 2006-10-17 Papiermaschinensieb Not-in-force EP1788151B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005055785A DE102005055785A1 (de) 2005-11-21 2005-11-21 Papiermaschinensieb

Publications (2)

Publication Number Publication Date
EP1788151A1 EP1788151A1 (de) 2007-05-23
EP1788151B1 true EP1788151B1 (de) 2010-01-06

Family

ID=37671051

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06122409A Not-in-force EP1788151B1 (de) 2005-11-21 2006-10-17 Papiermaschinensieb

Country Status (5)

Country Link
US (1) US7575026B2 (es)
EP (1) EP1788151B1 (es)
AT (1) ATE454494T1 (es)
DE (2) DE102005055785A1 (es)
ES (1) ES2337078T3 (es)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014212306A1 (de) * 2014-06-26 2015-12-31 Voith Patent Gmbh Bespannung

Family Cites Families (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1207264A (en) 1982-07-19 1986-07-08 Ghazi Dickakian Pitch for direct spinning into carbon fibers derived from a cat cracker bottoms feedstock
CA1277209C (en) * 1986-11-28 1990-12-04 Dale B. Johnson Composite forming fabric
DE3713510A1 (de) * 1987-04-22 1988-11-10 Oberdorfer Fa F Papiermaschinensieb aus einem doppellagigen gewebe
US4989647A (en) * 1988-04-08 1991-02-05 Huyck Corporaiton Dual warp forming fabric with a diagonal knuckle pattern
US4909284A (en) * 1988-09-23 1990-03-20 Albany International Corp. Double layered papermaker's fabric
DE3923938A1 (de) * 1989-07-19 1991-01-31 Oberdorfer Fa F Formiergewebe fuer die nasspartie einer papiermaschine
DE3938159A1 (de) * 1989-11-16 1991-05-23 Oberdorfer Fa F Verbundgewebe fuer papiermaschinensiebe
US5151316A (en) * 1989-12-04 1992-09-29 Asten Group, Inc. Multi-layered papermaker's fabric for thru-dryer application
US5067526A (en) * 1990-08-06 1991-11-26 Niagara Lockport Industries, Inc. 14 harness dual layer papermaking fabric
DE4302031C1 (de) * 1993-01-26 1993-12-16 Heimbach Gmbh Thomas Josef Trockensieb sowie Verfahren zu dessen Herstellung
JP3076703B2 (ja) * 1993-09-06 2000-08-14 日本フイルコン株式会社 製紙用経糸一重緯糸二重織物
US5437315A (en) * 1994-03-09 1995-08-01 Huyck Licensco, Inc. Multilayer forming fabric
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
US5544678A (en) * 1995-04-14 1996-08-13 Jwi Ltd. Composite forming fabric woven with an Nx2N machine side layer
US5967195A (en) 1997-08-01 1999-10-19 Weavexx Corporation Multi-layer forming fabric with stitching yarn pairs integrated into papermaking surface
GB2391557A (en) * 2002-08-06 2004-02-11 Richard Stone Forming fabric for papermaking
US6854488B2 (en) * 2002-12-24 2005-02-15 Voith Fabrics Heidenheim Gmbh & Co., Kg Fabrics with paired, interchanging yarns having discontinuous weave pattern
US6883556B2 (en) 2002-12-30 2005-04-26 Albany International Corp. Double cross parallel binder fabric
US6860969B2 (en) 2003-01-30 2005-03-01 Weavexx Corporation Papermaker's forming fabric
ATE430833T1 (de) * 2003-06-10 2009-05-15 Voith Patent Gmbh Papiermaschinenbespannungen mit gepaarten, wechselseitig eingebundenen multisegmentgarnen
EP1656480A1 (en) * 2003-08-13 2006-05-17 Voith Fabrics Patent GmbH Fabrics employing binder/top interchanging yarn pairs
US7007722B2 (en) * 2003-11-17 2006-03-07 Voith Paper Patent Gmbh Forming fabric
DE102004035523A1 (de) * 2004-07-22 2006-02-09 Voith Fabrics Patent Gmbh Papiermaschinenbespannung
DE102004035522A1 (de) * 2004-07-22 2006-03-16 Voith Fabrics Patent Gmbh Papiermaschinenbespannung
US7124781B2 (en) * 2005-02-01 2006-10-24 Albany International Corp. Multiple contour binders in triple layer fabrics

Also Published As

Publication number Publication date
US7575026B2 (en) 2009-08-18
US20070113914A1 (en) 2007-05-24
ES2337078T3 (es) 2010-04-20
DE502006005830D1 (de) 2010-02-25
ATE454494T1 (de) 2010-01-15
DE102005055785A1 (de) 2007-05-24
EP1788151A1 (de) 2007-05-23

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