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EP0264001B1 - Toile à deux couches pour machine à papier comprenant un côté machine à structure grosse et un côté papier à structure fine - Google Patents

Toile à deux couches pour machine à papier comprenant un côté machine à structure grosse et un côté papier à structure fine Download PDF

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Publication number
EP0264001B1
EP0264001B1 EP87113846A EP87113846A EP0264001B1 EP 0264001 B1 EP0264001 B1 EP 0264001B1 EP 87113846 A EP87113846 A EP 87113846A EP 87113846 A EP87113846 A EP 87113846A EP 0264001 B1 EP0264001 B1 EP 0264001B1
Authority
EP
European Patent Office
Prior art keywords
strands
threads
strand
forming fabric
weft
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
EP87113846A
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German (de)
English (en)
Other versions
EP0264001A1 (fr
Inventor
Fritz Vöhringer
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.)
F Oberdorfer & Co KG Industriegewebe-Technik GmbH
Original Assignee
F Oberdorfer & Co KG Industriegewebe-Technik 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6311718&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0264001(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by F Oberdorfer & Co KG Industriegewebe-Technik GmbH filed Critical F Oberdorfer & Co KG Industriegewebe-Technik GmbH
Priority to AT87113846T priority Critical patent/ATE60634T1/de
Publication of EP0264001A1 publication Critical patent/EP0264001A1/fr
Application granted granted Critical
Publication of EP0264001B1 publication Critical patent/EP0264001B1/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
    • 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 a double-layer paper machine screen according to the preamble of claim 1.
  • the paper side is provided with the closest possible mesh structure in order to achieve optimal fiber placement with the highest possible retention and complete freedom from marking, while the running side of the screen to achieve good drainage of the Paper material is formed coarse-mesh, which moreover reduces the susceptibility to contamination and the cleaning options are to be improved.
  • the running side should be sufficiently wear-resistant by appropriate material installation, so that at least the running times common today for double-layered sieves are achieved.
  • Significant progress has been made in achieving the above quality characteristics in double-ply paper machine screens in recent years without, however, being able to provide screens which fully correspond to the modern, fast and powerful, but also more sensitive printing processes in that they deliver papers of the highest quality can.
  • the so-called composite screens which consist of two complete, interconnected fabrics, have so far not been able to fully meet the requirements imposed by the required paper qualities.
  • the object of the invention is therefore to further develop the double-layer paper machine screen of the type mentioned so that it corresponds to the above-mentioned requirements placed on such screens, namely fine mesh on the paper side and coarse mesh on the barrel side with optimal wear behavior to a greater extent , so that these properties give rise to papers of the highest quality, which are highly suitable for modern, particularly sensitive printing processes.
  • twin threads formed from successive, transverse threads, which are arranged at a short distance from one another and even touch each other in the borderline case , but do not form double threads, as they are not bound by the same, but by different longitudinal threads.
  • twin threads are known from this area of technology, as can be seen from US Pat. No. 4,231,401 and DE-PS 30 44 762. Such twin threads, for which the term "weft pairing" was coined, have so far only appeared or been recognized in this context as a negative phenomenon which had to be avoided or eliminated.
  • the invention which elucidates the binding-mechanical causes of the twin effect, now makes it possible for this effect to make a particular contribution to solving the above-mentioned problem and to improve the running times in double-layer screens.
  • Claims 4 and 5 are directed to the weave teaching for the formation of weft pairs on the running side of the fabric, according to which the two threads of a pair of twin threads are expediently offset by n / 2 longitudinal threads, where n is the repeat number and / or the two longitudinal threads, which each incorporate one of the two threads of a pair of twin threads are advantageously woven in the same way with the other transverse threads apart from the twin threads themselves within the repeat.
  • the cross-thread sets on the paper side differ from one another and from the running side in the length of their floats for the purpose of creating a fairly open-meshed running side while maintaining a very fine-meshed forming side, in which as much wear material as possible can be installed.
  • the material and / or diameter of the sets of transverse thread on the paper side can be the same or different.
  • FIGS. 1 and 1a show a proven weaving pattern which is outstandingly suitable for the production of the finest papers.
  • FIGS. 1 and 1a Such a pattern is shown in FIGS. 1 and 1a), FIG. 1 showing the paper or forming side of a known double-layer fabric with seven shafts, and FIG. 1a) the running side.
  • a longitudinal thread set 1 is denoted here by a, b, c, d, e, f and g.
  • the transverse threads on the forming side are designated by 2 and the wear-side by 3.
  • the transverse threads 3 on the wear side are replaced by twin threads 4a, 4b, that is to say by thread pairs of successive, transverse threads which touch in this exemplary embodiment and, as can be seen, differ from the known double threads distinguish that they are bound by different longitudinal threads rather than the same.
  • the forming side that is to say the paper side, remains unchanged, which means that this fabric side in the embodiment according to FIG. 2 corresponds to that of FIG. 1, the partial repeats g, f, e, d, c, in the fourteen-shaft fabric of FIG. b, a, ... g ', e', d ', c', b ', a', differ only on the barrel side.
  • twin or pair-forming effect is further enhanced by the fact that the two longitudinal threads, each incorporating one of the two threads of a pair of twin threads, are woven in the same way within the repeat with the other transverse threads, except for the twin threads themselves. This means, based on the running side of the fabric shown in FIG. 2, that the individual threads 4a, 4b of a pair of twin threads at mutually corresponding locations of two adjacent repeats a, ... g; a ', ... g' are included; it is also said that the threads mentioned are "woven into the same place".
  • twin effect produced in this way is so strong that in many embodiments of such fabrics the egg threads of a pair of twin threads touch like double threads. However, this is not a necessary condition for achieving the desired goal mentioned at the beginning.
  • twin threads 4a, 4b are woven into the same place in two adjacent repeats, the surface on the paper side, that is to say the forming side of the fabric, is not disturbed by the twin threads on the running side. If an original binding with the lowest marking tendency is selected, this property is retained even if, as explained above, the wear-side or running-side transverse threads 3 (FIG. 1a) are replaced by the twin threads 4a, 4b. It is understood that not every running cross thread of the selected original weave pattern has to be replaced by a pair of twin threads, but rather only every second original cross thread can be replaced by a pair of twin threads. The other transverse threads then retain their original arrangement form, but can also be omitted entirely if this should be desired.
  • the transverse threads on the paper float over four successive longitudinal threads.
  • the dots marked with small circles indicate the points at which the transverse threads lying over the twin threads are crossed by a longitudinal thread.
  • the structure of the paper side (forming side) thus corresponds to that of a five-shaft satin fabric. It is therefore possible to combine a very fine-meshed paper side with a particularly coarse-meshed running side.
  • the floats of the thick paper-side transverse threads 2a cross four successive longitudinal threads, while the thinner paper-side transverse threads 2b cross six successive longitudinal threads.
  • the running-side, ie wear-side twin threads 4a, 4b span thirteen longitudinal threads. Their arrangement corresponds to that of the fabric of FIG. 2.
  • the cross thread sets on the paper side differ in this embodiment in their diameter.
  • the structure of the screen fabric described above creates drainage channels that correspond in shape to an inverted funnel.
  • the water from the fiber suspension enters the funnel at the small opening (fine mesh) and exits again at the large opening (coarse mesh).
  • fine mesh fine mesh
  • large opening coarse mesh
  • fiber mat very uniform fiber mat can form over the small funnel openings without a substantial proportion of fiber being drawn into the funnel.
  • retention that is the retention capacity for fiber material and fine materials, is greater in the double-layered screens according to the invention than in the known ones.
  • Another advantage of the double-layer screens described here is that the large funnel openings facing the dewatering elements of the paper machine, such as foils and suction devices, make it easier to keep the screens clean and clean.
  • the tendency to form and carry along vacuum inclusions in the funnels above the suction pads decreases with increasing funnel opening size.
  • the power consumption and energy consumption for driving the wire section are correspondingly lower.
  • twin threads should not mean that only thread twins are used, as they are based on the above exemplary embodiments, but also thread triplets, quads, quintuplets and the like. could be used, the theory of the invention is therefore not limited to twin threads and thus thread pairs, consisting of only two consecutive, transverse threads.
  • twin effect in the above would then be the case with thread triplets, thread quadruplets and the like. to a certain extent as a triplet effect, quadruple effect and the like. occur.
  • the double-layer paper machine sieves described here with a coarsely structured running side and finely structured paper side can be used for the production of essentially all types of paper, depending on the fineness and type of binding.
  • FIG. 6 an impression of the running side of the sieve according to the invention with twin threads is shown in FIG. 6, in which the weave and fineness also in FIG. 5 as Correspond to the imprint of the running side of the sieve shown, this imprint showing a known seven-stage sieve in 6.5 times magnification.
  • transverse or twin threads designated 4a and 4b above form a pair of transverse threads 4.

Landscapes

  • Paper (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Woven Fabrics (AREA)
  • Storage Of Web-Like Or Filamentary Materials (AREA)
  • Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)

Claims (7)

1. Toile à deux couches pour machine à papier grossièrement structurée du côté pontuseaux et finement structurée du côté papier, constituée d'un groupe de fils transversaux (2, 4) qui sont entretissés dans un rapport d'au moins 1 à 6, de telle sorte qu'un groupe de fils transversaux sur le côté pontuseaux forme un plan d'usure prédisposé et que les fils ou les groupes de fils transversaux restants soient disposés sur le côté papier et puissent se distinguer par le diamètre et/ou la longueur des flottages, caractérisée par le fait qu'au moins des parties des fils transversaux du côté pontuseaux (4a, 4b) forment des groupements ou jumelage constitués d'au moins deux fils étroitement adjacents qui sont entretissés de différents fils longitudinaux.
2. Toile à deux couches pour machine à papier selon la revendication 1, caractérisée par le fait que les groupements ou jumelage comprennent deux fils et/ou trois fils et/ou quatre fils et/ou cinq fils.
3. Toile à deux couches pour machine à papier selon l'une quelconque des revendications 1 ou 2, caractérisée par le fait que les divers fils des groupements ou jumelages se touchent au moins partiellement.
4. Toile à deux couches pour machine à papier selon l'une quelconque des revendications 1 à 3, caractérisée par le fait que les deux fils d'une paire jumelée sont décalés mutuellement de n/2 fils longitudinaux, n représentant le rapport.
5. Toile à deux couches pour machine à papier selon l'une quelconque des revendications 1 à 4, caractérisée par le fait que les deux fils longitudinaux dont chacun entretisse l'un des deux fils d'une paire jumelée est entretissé de la même manière dans les limites du rapport avec les autres fils transversaux qui ne sont pas les fils jumelés eux-mêmes.
6. Toile à deux couches pour machine à papier selon l'une quelconque des revendications 1 à 5, caractérisée par le fait qu'au moins deux groupes de fils transversaux côté papier (2a, 2b), dont la matière et/ou le diamètre peuvent être identiques ou différents, ainsi que le groupe de fils transversaux côté pontuseaux (4), se différencient par la longueur de leurs flottages.
7. Toile à deux couches pour machine à papier selon l'une quelconque des revendications 1 à 6, caractérisée par le fait que les différents fils formant le groupement ou jumelage se différencient les uns des autres en ce qui concerne leur matière et/ou leur diamètre.
EP87113846A 1986-10-14 1987-09-22 Toile à deux couches pour machine à papier comprenant un côté machine à structure grosse et un côté papier à structure fine Expired - Lifetime EP0264001B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87113846T ATE60634T1 (de) 1986-10-14 1987-09-22 Doppellagiges papiermaschinensieb mit grob strukturierter laufseite und fein strukturierter papierseite.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863635000 DE3635000A1 (de) 1986-10-14 1986-10-14 Doppellagiges papiermaschinensieb mit grob strukturierter laufseite und fein strukturierter papierseite
DE3635000 1986-10-14

Publications (2)

Publication Number Publication Date
EP0264001A1 EP0264001A1 (fr) 1988-04-20
EP0264001B1 true EP0264001B1 (fr) 1991-01-30

Family

ID=6311718

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87113846A Expired - Lifetime EP0264001B1 (fr) 1986-10-14 1987-09-22 Toile à deux couches pour machine à papier comprenant un côté machine à structure grosse et un côté papier à structure fine

Country Status (10)

Country Link
US (1) US5074339A (fr)
EP (1) EP0264001B1 (fr)
JP (1) JP2601848B2 (fr)
AT (1) ATE60634T1 (fr)
CA (1) CA1318219C (fr)
DE (2) DE3635000A1 (fr)
ES (1) ES2021316B3 (fr)
FI (1) FI89083C (fr)
NO (1) NO168189C (fr)
WO (1) WO1988002797A1 (fr)

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US5473981A (en) * 1993-07-16 1995-12-12 Asahi Glass Company Ltd. Screen printing plate
US5500277A (en) * 1994-06-02 1996-03-19 The Procter & Gamble Company Multiple layer, multiple opacity backside textured belt
US5496624A (en) * 1994-06-02 1996-03-05 The Procter & Gamble Company Multiple layer papermaking belt providing improved fiber support for cellulosic fibrous structures, and cellulosic fibrous structures produced thereby
US5983953A (en) * 1994-09-16 1999-11-16 Weavexx Corporation Paper forming progess
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US7275566B2 (en) * 2006-02-27 2007-10-02 Weavexx Corporation Warped stitched papermaker's forming fabric with fewer effective top MD yarns than bottom MD yarns
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Also Published As

Publication number Publication date
ES2021316B3 (es) 1991-11-01
NO882437L (no) 1988-06-02
ATE60634T1 (de) 1991-02-15
DE3767822D1 (de) 1991-03-07
US5074339A (en) 1991-12-24
JPH01501558A (ja) 1989-06-01
CA1318219C (fr) 1993-05-25
NO168189B (no) 1991-10-14
NO168189C (no) 1992-01-22
DE3635000A1 (de) 1988-04-21
WO1988002797A1 (fr) 1988-04-21
JP2601848B2 (ja) 1997-04-16
EP0264001A1 (fr) 1988-04-20
FI881354A0 (fi) 1988-03-22
NO882437D0 (no) 1988-06-02
FI89083C (fi) 1993-08-10
FI881354A7 (fi) 1988-04-15
FI89083B (fi) 1993-04-30

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