EP0053317A1 - Toile pour papeterie - Google Patents

Toile pour papeterie Download PDF

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Publication number
EP0053317A1
EP0053317A1 EP81109713A EP81109713A EP0053317A1 EP 0053317 A1 EP0053317 A1 EP 0053317A1 EP 81109713 A EP81109713 A EP 81109713A EP 81109713 A EP81109713 A EP 81109713A EP 0053317 A1 EP0053317 A1 EP 0053317A1
Authority
EP
European Patent Office
Prior art keywords
repeat
fabric
threads
papermaker
basic
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Withdrawn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
EP81109713A
Other languages
German (de)
English (en)
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
Application filed by F Oberdorfer & Co KG Industriegewebe-Technik GmbH filed Critical F Oberdorfer & Co KG Industriegewebe-Technik GmbH
Publication of EP0053317A1 publication Critical patent/EP0053317A1/fr
Withdrawn legal-status Critical Current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
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D13/00—Woven fabrics characterised by the special disposition of the warp or weft threads, e.g. with curved weft threads, with discontinuous warp threads, with diagonal warp or weft
    • D03D13/004—Woven fabrics characterised by the special disposition of the warp or weft threads, e.g. with curved weft threads, with discontinuous warp threads, with diagonal warp or weft with weave pattern being non-standard or providing special effects

Definitions

  • the invention relates to a papermaker's fabric in twill weave with a number of shafts exceeding the number 2.
  • the starting point for the invention is the knowledge, confirmed by experience and measurements, that the total wear volume of a sieve per unit of time is essentially independent of the type of fabric, whereby, as stated above, the edge zones are subject to increased wear. If all the transverse threads in the longitudinal direction of the sieve are subjected to the same abrasion stress in the cross-threading sieve, which is advantageous per se, with more than three shafts of cross-twill weave, then they are all ground down equally and have all achieved a weakening at the same time that they break at the same time and the sieve with this abrasion of the transverse threads must be removed from the machine because of the longitudinal cracks in the edge area. This point in time determines the life of a sieve.
  • the task is now to extend the life of the screen by simple measures or, in other words, to cause edge cracks only after wear of an abrasion volume that is greater than that stated above.
  • the idea according to the invention is to provide cross threads in close succession when looking in the machine longitudinal direction on the wire running surface, which are worn to different extents due to the different levels of their crankings.
  • the transverse thread sections adjacent to them which have not yet been worked through to the breaking point, then bear the load, despite the already strong weakening of the cross thread sections projecting furthest from the fabric plane, so that the occurrence of longitudinal tears is postponed.
  • the critical weakening points are, as seen in the machine longitudinal direction, offset sideways.
  • neighboring - repeat is defined in such a way that it lies next to the basic repeat when viewed in the warp direction.
  • An embodiment of the invention according to claim 4, which particularly advantageously meets the requirements for paper maker fabric mentioned in the introduction, uses both the longitudinal displacement between the basic and neighboring repeat as well as the principle of mirroring, although the basic and neighboring repeat are mirrored together and additionally shifted.
  • novel fabric which can be considered in the embodiment according to claim 7 by shifting the second repeat group of a four-shaft cross-body tissue in the longitudinal thread direction by half a repeat, the undesirable weft pairing of a four-shaft cross-body tissue, which is favorable in itself because of the distribution of the binding points, is avoided . This reduces screen marking and increases fiber retention.
  • the transverse threads on the top in each cartridge row pass at least twice over only one longitudinal thread, while on the underside of the cartridge the transverse thread offsets have at least two different lengths and thereby occur in different planes, the longest offset being at least over extends three longitudinal threads.
  • twill weaves With binding formulas of the type mentioned for example in claim 5, reorganizations of twill weaves are described.
  • the latter can be both warp and weft twill weaves as well as wide ridge twill weaves.
  • the number a indicates how many consecutive weft threads are crossed by the warp thread.
  • the number b defines the number of consecutive weft threads under which the warp thread runs until it returns to the top of the fabric.
  • the letters Z, S indicate the direction of the ridge (left or right body).
  • the counts n and k describe the reorganization of the warp wires in the fabric as follows:
  • the repeat limits are selected so that there is a warp or warp draft or the beginning of a warp offset in the lower left corner of the repeat (FIG. 1B).
  • the fabric according to the invention is to be produced rotated through 90 °, the warp and weft need only be interchanged in the counting process.
  • the binding scheme according to FIGS. 1A and 1B relates to a papermaker's fabric produced with eight shafts and four steps, in which, as for all illustrations, the warp threads 11 run vertically and the weft threads 12 run horizontally.
  • the basic repeat a is also surrounded by a frame 13 with solid lines and the neighboring repeat ⁇ is surrounded by a frame 14 with dashed lines.
  • FIG. 1A shows the basic repeat a of a four-shaft cross-twill fabric, but the binding in the weft direction to the basic repeat does not continue with a neighboring repeat that is identical to this, but the neighboring repeat ⁇ , as can be clearly seen in FIG. 1A, compared to the basic repeat in the longitudinal direction offset by two steps.
  • the resulting octagonal fabric which can be produced in four steps, shows on its running side, as shown in FIG. 1B, two cross thread offsets of different lengths, which consequently emerge from the underside of the screen at different distances.
  • These cross-offs of different lengths are offset laterally, which results in the desired effect that, when viewed in the direction of a longitudinal thread, the successive transverse threads wear very differently.
  • the longitudinal threads are displaced very irregularly due to the different lengths of the transverse thread offsets, which leads to such an arrangement of the transverse thread offsets on the paper side that the fabric on the paper does not produce any pronounced markings.
  • FIGS. 2A and 2B shows a fabric to be produced with 10 shafts and 5 steps, in which the neighboring repeat ⁇ compared to the basic repeat a in the longitudinal direction by four and in the transverse direction by one step is moved.
  • the cranks of the transverse threads 12 then appear in two very different lengths, the transverse thread cranks viewed in the longitudinal direction, have considerable dislocations from one another and the long cranks are always separated from one another by short cranks, which gives the fabric good strength against longitudinal cracks means.
  • the neighboring repeat ⁇ is formed by a reflection of the basic repeat a about a transverse axis.
  • the view of the running side of the fabric shows offsets of three different lengths with a strong lateral offset, so that a particularly good behavior against longitudinal tears of a paper machine screen can be expected.
  • FIG. 4A and 4B A papermaker's fabric made with eight shafts and four steps is shown schematically in Figures 4A and 4B.
  • the neighboring repeat ⁇ can be thought of as a reflection of the basic repeat ⁇ on the longitudinal side facing the neighboring repeat and shifted by one step in the longitudinal direction. While this fabric, as the illustration shows, has a particularly favorable arrangement of the binding points on the paper side, three crank lengths of the transverse threads of different lengths are formed on the running side, which consequently also have three different levels of wear.
  • FIG. 5 shows a weave scheme which has been further developed compared to the weave types described so far and shown in FIGS. 1 to 4.
  • the basic repeat ⁇ of a four-shaft cross-twill weave is used to form the neighboring repeat ⁇ first shifted in the longitudinal direction according to the fabric formation according to FIGS. 1A and 1B in the neighboring repeat.
  • the fabric is not repeated again with the basic repeat, but on the longitudinal edge of the neighboring repeat ⁇ opposite the basic repeat, the repeat group consisting of the basic repeat ⁇ and the neighboring repeat ⁇ is mirrored and the mirrored repeat group from the neighboring repeat ⁇ 'and the basic repeat a 'is additionally shifted in the longitudinal direction by one step in the direction in which the neighboring repeat ⁇ has also been shifted with respect to the basic repeat a.
  • FIGS. 6 to 8 and 9 to 12 are obtained from fabricated and fixed tissue samples by macro photography of these tissues or their micrographs along the cut lines shown.
  • continuous outline lines 13 of the basic repeat ⁇ and dashed outline lines 14 of the neighboring repeat ⁇ are drawn.
  • FIGS. 6 to 8 has a structure as shown schematically in FIGS. 1A and 1B.
  • FIG. 6 clearly shows the twists in both the longitudinal threads 11 and the transverse threads 12, as a result of which the binding points on the paper side of the fabric receive a good distribution.
  • FIG. 8 shows that the papermaker's fabric is a pure cross thread runner, although, as is clear from FIG. 7, due to the different lengths of the cross thread Cranks two different levels of wear are present, since the cross threads run alternately under four and under two longitudinal threads.
  • the papermaker's fabric is also produced with eight shafts and four steps, but here the neighboring repeat ⁇ is reflected by a reflection of the basic repeat a at the longitudinal edge common to the basic repeat and the neighboring repeat and an additional one Shift of the neighboring repeat in the longitudinal direction by one step.
  • the distribution of the binding points on the paper side is very favorable with regard to a product without markings, which is shown by a look at the illustration in FIG. 9.
  • the invention comprises further papermaker's fabrics, which are not directly reproduced with the figures of the description of exemplary embodiments, wherein one can also adapt to the requirements of the marked educational principles and special requirements and still be able to take advantage of the advantages offered by the invention.
  • the invention also encompasses fabrics which are made 180 ° or turned in the plane of the fabric in relation to those characterized by the subclaims, the fabrics described in detail or the fabrics shown in the drawing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Paper (AREA)
  • Woven Fabrics (AREA)
EP81109713A 1980-11-27 1981-11-16 Toile pour papeterie Withdrawn EP0053317A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3044762 1980-11-27
DE19803044762 DE3044762C2 (de) 1980-11-27 1980-11-27 Papiermachergewebe

Publications (1)

Publication Number Publication Date
EP0053317A1 true EP0053317A1 (fr) 1982-06-09

Family

ID=6117758

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81109713A Withdrawn EP0053317A1 (fr) 1980-11-27 1981-11-16 Toile pour papeterie

Country Status (2)

Country Link
EP (1) EP0053317A1 (fr)
DE (1) DE3044762C2 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2534601A1 (fr) * 1982-10-14 1984-04-20 Franck Sa Toiles Procede de fabrication de toiles plastiques, en particulier pour machines a papier, et toile plastique ainsi obtenue
FR2601976A1 (fr) * 1986-07-24 1988-01-29 Perm I Tsellju Toile pour machine a papier.
EP1724382A1 (fr) 2005-05-19 2006-11-22 Nippon Filcon Co., Ltd. Tissu technique à deux couches
US10329714B2 (en) 2016-10-28 2019-06-25 Astenjohnson, Inc. Guiding resistant forming fabric with balanced twill machine side layer

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US11591722B2 (en) 2021-07-12 2023-02-28 Voith Patent Gmbh Woven structured fabric with crossing twill lines

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1350537A (fr) * 1963-03-15 1964-01-24 British Nylon Spinners Ltd Perfectionnements aux tissus tissés
GB1134566A (en) * 1966-04-30 1968-11-27 United Wire Works Ltd A method of weaving fourdrinier fabric for endless belts of paper or board making machines
US4231401A (en) * 1978-06-16 1980-11-04 Unaform, Inc. Fabric for papermaking machines
US4281688A (en) * 1979-05-01 1981-08-04 Scapa Dryers (Canada) Ltd. Reversible forming fabric having dominating floats on each face
GB2069017A (en) * 1980-02-11 1981-08-19 Huyck Corp Papermaking fabrics

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH630974A5 (de) * 1977-12-15 1982-07-15 Siebtuchfabrik Ag Papiermaschinensieb.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1350537A (fr) * 1963-03-15 1964-01-24 British Nylon Spinners Ltd Perfectionnements aux tissus tissés
GB1134566A (en) * 1966-04-30 1968-11-27 United Wire Works Ltd A method of weaving fourdrinier fabric for endless belts of paper or board making machines
US4231401A (en) * 1978-06-16 1980-11-04 Unaform, Inc. Fabric for papermaking machines
US4281688A (en) * 1979-05-01 1981-08-04 Scapa Dryers (Canada) Ltd. Reversible forming fabric having dominating floats on each face
GB2069017A (en) * 1980-02-11 1981-08-19 Huyck Corp Papermaking fabrics

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2534601A1 (fr) * 1982-10-14 1984-04-20 Franck Sa Toiles Procede de fabrication de toiles plastiques, en particulier pour machines a papier, et toile plastique ainsi obtenue
EP0106775A1 (fr) * 1982-10-14 1984-04-25 TOILES FRANCK S.A., société anonyme Procédé de fabrication de toiles plastiques, en particulier pour machines à papier, et toile plastique ainsi obtenue
FR2601976A1 (fr) * 1986-07-24 1988-01-29 Perm I Tsellju Toile pour machine a papier.
EP1724382A1 (fr) 2005-05-19 2006-11-22 Nippon Filcon Co., Ltd. Tissu technique à deux couches
US7357156B2 (en) 2005-05-19 2008-04-15 Nippon Filcon Co., Ltd. Industrial two-layer fabric
EP2105524A1 (fr) * 2005-05-19 2009-09-30 Nippon Filcon Co., Ltd. Structure industrielle à deux couches
NO340615B1 (no) * 2005-05-19 2017-05-15 Nippon Filcon Kk Industriell tolags struktur
US10329714B2 (en) 2016-10-28 2019-06-25 Astenjohnson, Inc. Guiding resistant forming fabric with balanced twill machine side layer

Also Published As

Publication number Publication date
DE3044762A1 (de) 1982-05-27
DE3044762C2 (de) 1982-11-25

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19830415

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Inventor name: VOEHRINGER, FRITZ