EP0030490B1 - Perfectionnements aux toiles de formage double couche pour machines à papier - Google Patents

Perfectionnements aux toiles de formage double couche pour machines à papier Download PDF

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Publication number
EP0030490B1
EP0030490B1 EP80401654A EP80401654A EP0030490B1 EP 0030490 B1 EP0030490 B1 EP 0030490B1 EP 80401654 A EP80401654 A EP 80401654A EP 80401654 A EP80401654 A EP 80401654A EP 0030490 B1 EP0030490 B1 EP 0030490B1
Authority
EP
European Patent Office
Prior art keywords
threads
warp
ratio
shute
upper layer
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
EP80401654A
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German (de)
English (en)
French (fr)
Other versions
EP0030490A1 (fr
Inventor
Robert Karm
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.)
MARTEL CATALA AND CIE
Original Assignee
MARTEL CATALA AND CIE
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Filing date
Publication date
Application filed by MARTEL CATALA AND CIE filed Critical MARTEL CATALA AND CIE
Priority to AT80401654T priority Critical patent/ATE6079T1/de
Publication of EP0030490A1 publication Critical patent/EP0030490A1/fr
Application granted granted Critical
Publication of EP0030490B1 publication Critical patent/EP0030490B1/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
    • Y10S162/903—Paper forming member, e.g. fourdrinier, sheet forming member

Definitions

  • the invention relates to forming fabrics for paper machines, of the type commonly known as "double layer” comprising two layers of weft threads and one layer of warp threads and having a warp ratio of at least 6 threads (US-A -4 171 009).
  • paper machine is to be interpreted in a broad sense, as encompassing any machine for manufacturing sheets of paper pulp, cellulose for paper pulp, paper itself, kraft or cardboard and non-woven woven on a dry or wet table; moreover, the invention applies whether the sheet is formed on an endless cloth, between two endless cloths or between an endless cloth and cylinders.
  • Single-layer fabrics consist of a single layer of longitudinal threads and a single layer of transverse threads; double layer fabrics have a single layer of warp thread binding, by weaving, two layers of weft thread, more or less superimposed in pairs and having the same number of transverse threads per unit length in the upper layer (on the side where the canvas supports the paper) and in the lower layer (on the side where the canvas is in contact with the elements of the paper machine).
  • these fabrics woven flat, then joined together, so that the warp threads constitute the longitudinal threads on the paper machine.
  • Triple-layer fabrics use two layers of longitudinal threads which are distinguished from one another, in particular by their evolution in the fabric: one of the layers evolves mainly on the paper side, the other mainly on the machine side.
  • the two layers generally differ from one another, for example by the diameter of the threads which constitute them, their nature, the number of threads per unit of width and the embuvage in weaving.
  • Double layer fabrics have many advantages over single layer fabrics, including higher stiffness and longer life. They tend, for many applications, to replace single-layer fabrics. On the other hand, triple-layer fabrics are little used, because the presence in the fabric of two kinds of warp threads evolving in a different way considerably complicates weaving and requires looms with at least two beams.
  • the threads constituting a canvas for a paper machine can be metallic or made of plastic.
  • Plastic fabrics have a longer lifespan than metallic fabrics, due to the better resistance of plastic bristles to abrasion.
  • different weaving weaves must be adopted, given the flexibility of the plastic bristles and they result in a mark on the paper which is clearly different from that produced by the metallic fabrics and which is not acceptable for certain types of paper, in particular those intended for gravure printing.
  • the present invention aims to provide a plastic fabric that better meets those previously known to the requirements of practice, in particular in that it combines the favorable characteristics of conventional double layer fabrics, in particular a long service life on the machine and a low brittleness. the sinking, with the weak mark which has so far been the prerogative of the metallic fabrics.
  • the invention provides in particular a double-layer fabric according to claims 1 or 4 having an overall weft ratio of at least 12 threads, in which: the bonding points of the warp threads with the lower layer (intended to be placed on the machine side) are distributed in a satin, the ratio of which is equal to the overall warp ratio; the bonding points with the weft threads of the upper layer (intended to be placed on the paper side) have a ratio equal to the overall warp ratio, but constituted by the juxtaposition of two or three weaves with warp ratio less than 6; and between each place where a warp thread descends through the upper layer and that where it rises further through this same layer, there are at least two weft threads of the upper layer.
  • global warp ratio designates above the number of threads in the smallest warp thread group whose evolution is repeated identically in the weft direction, while the “global warp ratio” is the corresponding number of weft threads in the warp direction.
  • chain ratio when applied to the tying stitches, denotes the number of threads in the smallest group of warp threads for which the tying stitches are repeated in the form of identical patterns.
  • the canvas can be produced with a conventional weaving loom comprising a single beam, by techniques well mastered at the present time.
  • the longitudinal and transverse threads are chosen from the group consisting of multi-filament and monofilament threads synthetic, used alone or in combination with yarn. metallic; the wires may or may not be coated or sheathed. They can all be identical in the same canvas or combined. As for the filling coefficient of the warp threads, it will generally be at least 1.05.
  • the bonding points of the lower layer of weft threads 10 with the warp threads 11 are arranged in an irregular satin six, while the bonding points of the weft threads 12 of the upper layer with the warp threads 11 are distributed in two twists of three juxtaposed (chain ratio of three) leading to a cumulative chain ratio of 6.
  • FIG. 1 b clearly shows that there is, side machine, a chain ratio of 6 with a single tying point, hence the presence of large floats on the weft son 10 in contact with the elements of the machine. On the paper side, it can be seen that the high number of simple binding points between warp threads 11 and weft threads 12 multiplies the points of contact between the sheet of paper and the canvas.
  • the difference in level D (FIG. 2) between the warp yarn loops 11 and the weft yarn loops 12 should be as low as possible to reduce the mark.
  • the admissible level difference D generally does not exceed 0.02 mm. This result is achieved, in the case illustrated in FIGS. 1 a and 1 b, because the floats, of weft on the paper side cover only two warp threads, so that they are not pushed too strongly towards the outside of the canvas on the paper side. It can also be seen, in FIGS. 1 and 2, that two weft threads 12 of the upper layer are inserted between the place where a warp thread 11 descends from the face on the paper side and that where it goes up towards this face.
  • this number of two wires will constitute a minimum. It is possible to provide for more yarns from the upper layer, it being understood that the warp yarn can trap only weft yarns 12 from the upper layer, as shown in FIG. 2, or also trap weft yarns 10 from the lower layer, in particular when a number of weft threads 12 greater than two is interposed between the point of descent and the point of rise of the warp thread 11.
  • the overall warp ratio is 7, while the overall weft ratio is fourteen.
  • the weft threads 12 of the upper layer are linked to the warp threads 11 in a twill of three plus a twill of four juxtaposed, which leads to a cumulative warp ratio of seven.
  • the weft threads 10 of the lower layer are linked to the warp threads 11 following an irregular satin of seven.
  • the embodiment illustrated in Figures 4a and 4b belongs to the group of those who seem to constitute the most favorable compromise between the simplicity of the looms and the ease of weaving (which implies a number of harnesses as low as possible in the loom and an even ratio ) and a high ratio, which allows both long floats on the machine side and a paper side split into several weaves with low overall chain ratio.
  • the fabric shown in FIGS. 4a and 4b has an overall warp ratio of 8.
  • the linkages of the warp threads 11 with the weft threads 12 of the upper layer are carried out according to two twists of four juxtaposed, leading to a ratio of cumulative warp of 8.
  • the weft yarns 10 of the lower layer are linked to the warp yarns 11 according to a regular satin of eight, with a notch of 5.
  • FIG. 5 shows a fabric the overall warp ratio of which is still 8.
  • the weft threads 12 of the upper layer are linked to the warp threads 11 according to two irregularly shaped satins of four or juxtaposed Turkish satin.
  • the weft threads 10 of the lower layer are linked to the warp threads according to a regular satin of eight with a notch of 3.
  • the weft threads 12 of the upper layer are linked to the warp threads 11 in a twill of five and a twill of four juxtaposed, which leads to a cumulative warp ratio of 9.
  • the weft threads 10 of the lower layer are linked to the warp threads in an irregular satin nine.
  • the weft threads 12 of the upper layer are linked to the warp threads in three twills of three juxtaposed, leading to a cumulative warp ratio of 9.
  • the weft threads 10 of the lower layer are linked to the warp threads 11 following a regular satin 9 with an unhooking 4.
  • the weft threads 12 of the upper layer are linked to the warp threads in two twills of 5 juxtaposed, leading to a cumulative warp ratio of 10.
  • the weft threads 10 of the lower layer are linked to the warp threads 11 following a satin of 10 irregulars with alternating recesses of 7 and 5.
  • weft threads 12 of the upper layer are linked to the warp threads 11 according to two satins of five regulars with juxtaposed notches 3, leading to a cumulative warp ratio of 10.
  • the threads of weft 10 of the lower layer are linked to the warp threads 11 according to a regular satin of 10 with a notch of 3.
  • the number of bonding points of the warp threads 11 with the weft threads 12 of the upper layer is at least double the number of bonding points of these warp threads 11 with the weft threads 10 of the lower layer.
  • FIG. 1b it can be seen that there are two upper bindings for a lower binding. The same is true in the case of FIGS. 3, 4, 5, 6, 8 and 9. But, in the case of FIG. 7, there are three upper bindings for a lower binding.
  • the fabrics according to the invention will, in most cases, be produced by flat weaving, then joined together.
  • This arrangement which leads to a fabric, the weft threads of which are placed transversely on the machine, has the advantage of leading to high transverse rigidity and to a longer service life, the wear bearing first on the threads. transverse, in particular of the lower layer.

Landscapes

  • Paper (AREA)
  • Woven Fabrics (AREA)
  • Treatment Of Fiber Materials (AREA)
EP80401654A 1979-11-19 1980-11-18 Perfectionnements aux toiles de formage double couche pour machines à papier Expired EP0030490B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80401654T ATE6079T1 (de) 1979-11-19 1980-11-18 Doppellagige gewebe fuer papiermaschinen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7928501 1979-11-19
FR7928501A FR2470187A1 (fr) 1979-11-19 1979-11-19 Perfectionnements aux toiles de formage double couche pour machines a papier

Publications (2)

Publication Number Publication Date
EP0030490A1 EP0030490A1 (fr) 1981-06-17
EP0030490B1 true EP0030490B1 (fr) 1984-02-01

Family

ID=9231846

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80401654A Expired EP0030490B1 (fr) 1979-11-19 1980-11-18 Perfectionnements aux toiles de formage double couche pour machines à papier

Country Status (10)

Country Link
US (1) US4408637A (enrdf_load_stackoverflow)
EP (1) EP0030490B1 (enrdf_load_stackoverflow)
AT (1) ATE6079T1 (enrdf_load_stackoverflow)
AU (1) AU539809B2 (enrdf_load_stackoverflow)
CA (1) CA1152791A (enrdf_load_stackoverflow)
DE (1) DE3066433D1 (enrdf_load_stackoverflow)
FR (1) FR2470187A1 (enrdf_load_stackoverflow)
IE (1) IE50278B1 (enrdf_load_stackoverflow)
MX (1) MX156356A (enrdf_load_stackoverflow)
NZ (1) NZ195579A (enrdf_load_stackoverflow)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE8102194L (sv) * 1981-04-06 1982-10-07 Pharmacia Ab Terapeutiskt aktiv organisk forening och farmaceutisk beredning innehallande denna
US4995429A (en) * 1986-02-05 1991-02-26 Albany International Corp. Paper machine fabric
DE3817144A1 (de) * 1988-05-19 1989-11-30 Wangner Gmbh Co Kg Hermann Doppellagige bespannung fuer den blattbildungsbereich einer papiermaschine
US4984772A (en) * 1989-05-15 1991-01-15 E. I. Du Pont De Nemours And Company High speed crosslapper
US5102725A (en) * 1991-04-01 1992-04-07 Jps Converter And Industrial Fabric Corp. Dual layer composite fabric
US5360518A (en) * 1991-12-18 1994-11-01 Albany International Corp. Press fabrics for paper machines
WO2007096218A1 (de) * 2006-02-25 2007-08-30 Voith Patent Gmbh Gewebeband für eine maschine zur herstellung von bahnmaterial, insbesondere papier oder karton
US7766053B2 (en) * 2008-10-31 2010-08-03 Weavexx Corporation Multi-layer papermaker's forming fabric with alternating paired and single top CMD yarns
JP5281877B2 (ja) * 2008-11-28 2013-09-04 日本フイルコン株式会社 工業用二層織物
US8251103B2 (en) 2009-11-04 2012-08-28 Weavexx Corporation Papermaker's forming fabric with engineered drainage channels
CN103451802B (zh) * 2013-09-19 2014-09-24 钱之毅 宽幅丝织彩色三层夹空提花墙布织物
WO2024107737A1 (en) * 2022-11-15 2024-05-23 Astenjohnson International, Inc. Forming fabric with stair-case weft arrangement to generate topography

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1023270A (fr) * 1949-08-11 1953-03-16 Procédé pour la fabrication de tissus lainés pour couvertures et articles similaires ainsi que les tissus conformes à ceux obtenus par ce procédé
US3009489A (en) * 1957-02-18 1961-11-21 Beacon Mfg Co Reversible blanket
GB822392A (en) * 1957-02-25 1959-10-21 Beacon Mfg Co Improvements in or relating to woven blankets
US4071050A (en) * 1972-09-01 1978-01-31 Nordiska Maskinfilt Aktiebolaget Double-layer forming fabric
US3915202A (en) * 1974-05-03 1975-10-28 Albany Int Corp Fourdrinier papermaking belts
SE385486B (sv) * 1974-10-10 1976-07-05 Nordiska Maskinfilt Ab Formeringsvira for pappers-, cellulosa- eller liknande maskiner samt sett att framstella densamma
SE397371C (sv) * 1976-02-24 1980-08-18 Nordiska Maskinfilt Ab Formeringsvira for pappers-, cellulosa- eller liknande maskiner
FR2346489A1 (fr) * 1976-04-02 1977-10-28 Martel Catala Et Cie Sa Ets Perfectionnements aux toiles pour machines a papier et a leurs procedes de fabrication
US4086941A (en) * 1976-10-26 1978-05-02 Huyck Corporation Biplanar papermaker's belt
US4314589A (en) * 1978-10-23 1982-02-09 Jwi Ltd. Duplex forming fabric
US4356844A (en) * 1980-02-11 1982-11-02 Huyck Corporation Papermaker's forming fabric

Also Published As

Publication number Publication date
IE50278B1 (en) 1986-03-19
FR2470187A1 (fr) 1981-05-29
IE802392L (en) 1981-05-19
CA1152791A (en) 1983-08-30
AU6452880A (en) 1981-05-28
EP0030490A1 (fr) 1981-06-17
MX156356A (es) 1988-08-12
AU539809B2 (en) 1984-10-18
US4408637A (en) 1983-10-11
NZ195579A (en) 1984-02-03
FR2470187B1 (enrdf_load_stackoverflow) 1984-12-28
ATE6079T1 (de) 1984-02-15
DE3066433D1 (en) 1984-03-08

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