EP0080686A1 - Tissu à couche double servant de Fourdrinier pour machines à papier - Google Patents
Tissu à couche double servant de Fourdrinier pour machines à papier Download PDFInfo
- Publication number
- EP0080686A1 EP0080686A1 EP82110798A EP82110798A EP0080686A1 EP 0080686 A1 EP0080686 A1 EP 0080686A1 EP 82110798 A EP82110798 A EP 82110798A EP 82110798 A EP82110798 A EP 82110798A EP 0080686 A1 EP0080686 A1 EP 0080686A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wires
- warp
- wire
- weft
- fabric
- 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.)
- Granted
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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 fabric as a covering for paper machines, both for the sheet forming part and for the dryer section.
- the fabric contains two layers of transverse weft wires and longitudinal warp wires, at least some of which are interwoven with the weft wires of both layers.
- the synthetic sieve has been in constant development since the start of the conversion of paper machines from operation with metal cloths to synthetic sieves. Synthetic fabrics are also used in the dryer section. First, single-layer bindings were used. The switch to double-layer bindings has improved longitudinal stability and retention. However, the fabric marking of the paper web and the high abrasion still cause difficulties, particularly when used in the sheet-forming part of the wet end.
- the invention has for its object to provide a double-layer fabric as a covering for paper machines, which is also suitable for the production of marking-sensitive papers, has a good review and a long term.
- the fact that only a slight marking is caused by the double-layer fabric according to the invention can be attributed to the fact that the fibers of the paper web are supported instead of by individual sheets of the wires by a surface structure which is formed by the adjacent warp wires guided in parallel, in particular if these have two or more weft wires of the upper sieve layer are running.
- the fact that the warp threads are parallel at least in places means that they rise to the top of the screen in front of the same weft wire and also leave it together _ behind the same weft wire.
- the marking is stronger because the surface consists of numerous individual offsets of the warp or weft wires, which leave relatively deep impressions in the easily deformable paper fiber flow.
- these impressions have a legal arrangement that stands out as a fabric marking, although the individual impression is barely perceptible.
- the warp - caused or Schussabkröpfitch impressions are especially strong when the offsets are surrounded by open mesh.
- the flat support of the paper pulp is preferably formed by immediately adjacent warp wires and not by weft wires, because the density of the warp wires in a double-layer wire is normally three times as high as the density of the weft wires. It It is therefore very difficult to bring two successive weft wires so close together that they form an almost closed area for the pulp. -With the warp wires, this problem does not exist, since the filling level of the double-wire screen is usually over 100% percent.
- An improvement in the fabric marking also results from the fact that the top of the fabric has two types of markings, firstly the surface markings which are formed by the warp wires which are guided in parallel in places, and secondly the individual wire markings which result from the offset of individual weft wires. These two types of markings alternate, thereby breaking the regularity of the marking arrangement, which is tantamount to reducing the marking.
- the drawing relates to open woven fabrics, so that the warp wires run in the machine direction and the weft wires run transversely to them.
- the invention is also applicable to endless or round woven screens, the terms “warp wires” and “weft wires” to be interchanged.
- warp wires are always understood to mean those in the machine direction and “weft wires” are always the wires running transversely thereto.
- the desired planar support of the pulp is obtained by running the warp wire pair over at least two weft wires 2 of the upper layer.
- the pair of guiding of the warp wires results in a doubling of the free floatation of the weft wire 2 for a given warp wire density without the number of shafts of the weaving machine having to be doubled.
- the weft wire 2 can also be bent more strongly, because by arranging the warp wires 1 in pairs, much thicker weft wires 2 can be used in the lower layer next to one another.
- the double warp wire guide has no advantages.
- the distribution of the warp wire cross-section over several wires results in an overall thinner and more flexible paper machine wire, but at the same time the open area decreases due to the widening of the wire cross-section in the transverse direction.
- the sieves became very sensitive to abrasion, although the overall cross-section of the chain remained unchanged.
- the double-layer fabric shown in Fig. 1 not one warp wire is divided into two warp wires, but the warp wire thickness remains unchanged compared to a fabric of otherwise the same construction and only the warp wire guide is changed so that a double chain results.
- the warp wires are much thinner than the weft wires and even less than half the way through In the embodiment of the invention shown in FIG. 1, the weft wires 2 and the warp wires 1 have approximately the same diameter, whereby, as is generally customary, the diameter of the warp wires can be approximately 10% smaller.
- the warp wires 1 a, 1 b run in pairs only on the upper side of the fabric.
- the course of the one warp wire of a pair is shown in the upper illustration of FIG. 2 and the course of the other warp wire of the same pair in the lower illustration of FIG. 2.
- FIG. 3 Another embodiment of the principle of the formation of support surfaces is shown in FIG. 3.
- the warp wires 1 are guided in such a way that they are involved twice in the formation of the supporting surfaces per repeat on the paper side: the first time together with the preceding warp wire, the second time with the subsequent warp wire.
- This embodiment has the advantage over the embodiment shown in FIGS. 1 and 2 that adjacent warp wires 1 no longer run parallel to one another in the inside of the sieve, but in the inside of the sieve always run at a considerable angle to each other. This causes an opening in the oblique direction and thus a higher permeability inside the tissue.
- FIG. 4 a view from above of the lower layer of the fabric shows how a better (stronger) cropping of these weft wires can be achieved by twisting the warp wires 1 in pairs around the lower weft wires 2.
- each warp wire 1 is cranked together with the preceding warp wire around a certain weft wire 2, i.e. H. runs under a weft wire. It then runs two warp wires far inside the screen, i. is passed over two weft wires, and is then bent again with the subsequent warp wire under the third weft wire.
- the warp wires can also run over a distance of more than two weft wires inside the fabric. Regardless of the binding of the upper layer, this twisting of the warp wires in the lower layer results in a stronger cranking of the weft wires and thus an improvement in the running time.
- a weft wire is cranked the more, firstly, the longer the free float F is, secondly, the greater the force A with which the outer warp wires A press against the weft wire, and thirdly, the larger the downward force exerted by the internal warp wires B.
- the length of the free float is determined by the number of shafts in the binding and is therefore predetermined, so that for a specific binding the strength of the offset is influenced by the forces exerted by the external and internal warp wires becomes.
- the outer warp wires A must be strong enough (large diameter) to form the short weft arc. According to the principle illustrated in FIG. 4, this is achieved in that two adjacent warp wires cooperate in the cranking.
- the downward force exerted by the inner warp wires B can be increased by cranking each warp wire per repeat by at least two not immediately successive weft wires on the running side. While in conventional bindings the chain is looped upwards to the upper layer on the inside of the wire after looping a weft wire, the warp wire is cropped by another weft wire before it is tied into the upper layer.
- FIG. 6 shows in the upper figure this two-time integration of each warp wire per repeat in the lower layer.
- the lower illustration of FIG. 6 shows the joining together of two warp wires to form a weft arch.
- Another advantage is that there are relatively few parallel warp wires inside the screen, i. H. most of the warp wires run at an angle to each other inside the sieve. This prevents blockages in the inside of the sieve and increases the drainage capacity of the sieve. This measure has a greater impact the higher the number of shanks of the binding.
- the fabric is double-layered and consists of 62 longitudinal wires / cm (warp wires for flat weaving, weft wires for continuous weaving) made of polyester monofilament with a wire diameter of 0.17 mm.
- the cross wires lying one above the other in pairs are also monofilaments.
- the fabric has a total of 2 x 23 cross wires, 23 in the top layer and 23 in the bottom.
- the cross wires of the top layer are made of polyester throughout and have a diameter of 0.17 mm.
- alternating wires made of polyester and polyamide are woven, both have a diameter of 0.18 mm.
- the longitudinal wires are therefore only brought together on the paper side, so that there is a fabric with a flat top and a conventionally designed running side.
- the successive longitudinal wires are merged in pairs once at the top and once at the bottom, but have the remaining length, i. H. outside of these bend points, a different course.
- the density of the longitudinal wires is again 62 per cm. They are polyester monofilaments with a diameter of 0.17 mm.
Landscapes
- Woven Fabrics (AREA)
- Paper (AREA)
- Ropes Or Cables (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT82110798T ATE19105T1 (de) | 1981-11-23 | 1982-11-23 | Doppellagiges gewebe als bespannung fuer papiermaschinen. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3146385A DE3146385C2 (de) | 1981-11-23 | 1981-11-23 | Doppellagiges Gewebe als Bespannung für Papiermaschinen |
DE3146385 | 1981-11-23 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0080686A1 true EP0080686A1 (fr) | 1983-06-08 |
EP0080686B1 EP0080686B1 (fr) | 1986-04-09 |
Family
ID=6147006
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP82110798A Expired EP0080686B1 (fr) | 1981-11-23 | 1982-11-23 | Tissu à couche double servant de Fourdrinier pour machines à papier |
Country Status (4)
Country | Link |
---|---|
US (1) | US4564052A (fr) |
EP (1) | EP0080686B1 (fr) |
AT (1) | ATE19105T1 (fr) |
DE (2) | DE3146385C2 (fr) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0144529A2 (fr) * | 1983-08-17 | 1985-06-19 | Hermann Wangner GmbH & Co. KG | Toile à plusieurs couches pour machine à papier |
EP0144530A2 (fr) * | 1983-08-17 | 1985-06-19 | Hermann Wangner GmbH & Co. KG | Toile pour machine à papier |
EP0185108A1 (fr) * | 1984-12-18 | 1986-06-25 | F. Oberdorfer GmbH & Co. KG Industriegewebe-Technik | Bandes de pressage revêtues utilisables dans une presse à pinçage prolongé |
EP0232708A1 (fr) * | 1986-01-08 | 1987-08-19 | Huyck Corporation | Tissu double couche ayant un rapport de seize |
DE3635632A1 (de) * | 1986-10-20 | 1988-04-21 | Wangner Gmbh Co Kg Hermann | Bespannung fuer den blattbildungsteil einer papiermaschine |
EP0342684A2 (fr) * | 1988-05-19 | 1989-11-23 | NOVATECH GmbH Siebe und Technologie für Papier | Toile à deux couches pour la section de formation d'une machine à papier |
EP0345643A3 (fr) * | 1988-06-09 | 1991-08-28 | Nippon Filcon Co., Ltd. | Toile pour papeterie du type usure-trame |
EP0698682A1 (fr) * | 1994-08-23 | 1996-02-28 | Albany International Corp. | Tissu pour papeterie à trois couches ayant un support pour fibres amélioré |
EP3754107A4 (fr) * | 2018-02-15 | 2021-07-21 | Nippon Filcon Co., Ltd | Tissu industriel à deux couches |
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US4709732A (en) * | 1986-05-13 | 1987-12-01 | Huyck Corporation | Fourteen harness dual layer weave |
DE3634649A1 (de) * | 1986-10-10 | 1988-04-14 | Wangner Gmbh Co Kg Hermann | Bespannung fuer den blattbildungsteil einer papiermaschine mit zusaetzlichen, flottierenden querfaeden groesserer rapportlaenge |
DE3635000A1 (de) * | 1986-10-14 | 1988-04-21 | Oberdorfer Fa F | Doppellagiges papiermaschinensieb mit grob strukturierter laufseite und fein strukturierter papierseite |
US4870998A (en) * | 1987-02-13 | 1989-10-03 | Scapa, Inc. | Low stretch papermaking fabric |
AT395441B (de) * | 1987-08-12 | 1992-12-28 | Hutter & Schrantz Ag | Doppellagiges gewebe zur bespannung fuer papiermaschinen |
DE3801051A1 (de) * | 1988-01-15 | 1989-07-27 | Wangner Gmbh Co Kg Hermann | Doppellagige bespannung fuer den blattbildungsbereich einer papiermaschine |
US5052448A (en) * | 1989-02-10 | 1991-10-01 | Huyck Corporation | Self stitching multilayer papermaking fabric |
US5025839A (en) * | 1990-03-29 | 1991-06-25 | Asten Group, Inc. | Two-ply papermakers forming fabric with zig-zagging MD yarns |
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 |
US5421374A (en) * | 1993-10-08 | 1995-06-06 | Asten Group, Inc. | Two-ply forming fabric with three or more times as many CMD yarns in the top ply than in the bottom ply |
US5983953A (en) * | 1994-09-16 | 1999-11-16 | Weavexx Corporation | Paper forming progess |
US5518042A (en) * | 1994-09-16 | 1996-05-21 | Huyck Licensco, Inc. | Papermaker's forming fabric with additional cross machine direction locator and fiber supporting yarns |
US5709250A (en) * | 1994-09-16 | 1998-01-20 | Weavexx Corporation | Papermakers' forming fabric having additional fiber support yarns |
US5887630A (en) * | 1996-10-23 | 1999-03-30 | Asten, Inc. | Papermakers fabric with enhanced cmd support and stacking |
US6077397A (en) * | 1996-10-23 | 2000-06-20 | Asten, Inc. | High support papermakers fabric |
US5937914A (en) * | 1997-02-20 | 1999-08-17 | Weavexx Corporation | Papermaker's fabric with auxiliary yarns |
US5857498A (en) * | 1997-06-04 | 1999-01-12 | Weavexx Corporation | Papermaker's double layer forming fabric |
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US6248210B1 (en) | 1998-11-13 | 2001-06-19 | Fort James Corporation | Method for maximizing water removal in a press nip |
US6123116A (en) * | 1999-10-21 | 2000-09-26 | Weavexx Corporation | Low caliper mechanically stable multi-layer papermaker's fabrics with paired machine side cross machine direction yarns |
US6179013B1 (en) | 1999-10-21 | 2001-01-30 | Weavexx Corporation | Low caliper multi-layer forming fabrics with machine side cross machine direction yarns having a flattened cross section |
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US4071050A (en) * | 1972-09-01 | 1978-01-31 | Nordiska Maskinfilt Aktiebolaget | Double-layer forming fabric |
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 |
DE2907488C2 (de) * | 1979-02-26 | 1982-07-01 | Dürener Metalltuch Schoeller, Hoesch & Co, 5160 Düren | Papiermaschinenlangsieb |
US4356844A (en) * | 1980-02-11 | 1982-11-02 | Huyck Corporation | Papermaker's forming fabric |
US4359069A (en) * | 1980-08-28 | 1982-11-16 | Albany International Corp. | Low density multilayer papermaking fabric |
DE3036409C2 (de) * | 1980-09-26 | 1983-01-20 | Hermann Wangner Gmbh & Co Kg, 7410 Reutlingen | Doppellagiges Sieb für den Siebteil einer Papiermaschine |
-
1981
- 1981-11-23 DE DE3146385A patent/DE3146385C2/de not_active Expired
-
1982
- 1982-11-23 DE DE8282110798T patent/DE3270485D1/de not_active Expired
- 1982-11-23 EP EP82110798A patent/EP0080686B1/fr not_active Expired
- 1982-11-23 AT AT82110798T patent/ATE19105T1/de not_active IP Right Cessation
-
1984
- 1984-11-28 US US06/676,208 patent/US4564052A/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB964791A (en) * | 1960-07-21 | 1964-07-22 | Henry Johnson | Improvements in fourdrinier wires for paper machines |
DE2263476A1 (de) * | 1972-09-01 | 1974-03-07 | Nordiska Maskinfilt Ab | Formgewebe sowie verfahahren zu dessen herstellung |
DE2540490A1 (de) * | 1974-10-10 | 1976-04-22 | Nordiska Maskinfilt Ab | Zweilagiges formiersieb |
DE2706235A1 (de) * | 1976-02-24 | 1977-09-08 | Nordiska Maskinfilt Ab | Formiergewebe fuer papier-, zellulose- oder aehnliche maschinen |
DE7630822U1 (de) * | 1976-04-02 | 1977-03-24 | Ets. Martel, Catala & Cie S.A., Selestat (Frankreich) | Endloses sieb fuer papiermaschinen |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0144529A2 (fr) * | 1983-08-17 | 1985-06-19 | Hermann Wangner GmbH & Co. KG | Toile à plusieurs couches pour machine à papier |
EP0144530A2 (fr) * | 1983-08-17 | 1985-06-19 | Hermann Wangner GmbH & Co. KG | Toile pour machine à papier |
EP0144530A3 (en) * | 1983-08-17 | 1985-07-03 | Hermann Wangner Gmbh & Co Kg | Screen-cloth for a paper-making machine |
EP0144529A3 (en) * | 1983-08-17 | 1985-07-03 | Hermann Wangner Gmbh & Co Kg | Multilayer cloth for a paper-making machine |
EP0185108A1 (fr) * | 1984-12-18 | 1986-06-25 | F. Oberdorfer GmbH & Co. KG Industriegewebe-Technik | Bandes de pressage revêtues utilisables dans une presse à pinçage prolongé |
US4789009A (en) * | 1986-01-08 | 1988-12-06 | Huyck Corporation | Sixteen harness dual layer weave |
EP0232708A1 (fr) * | 1986-01-08 | 1987-08-19 | Huyck Corporation | Tissu double couche ayant un rapport de seize |
DE3635632A1 (de) * | 1986-10-20 | 1988-04-21 | Wangner Gmbh Co Kg Hermann | Bespannung fuer den blattbildungsteil einer papiermaschine |
EP0264881A1 (fr) * | 1986-10-20 | 1988-04-27 | Hermann Wangner GmbH & Co. KG | Toile pour la partie humide d'une machine à papier |
EP0342684A2 (fr) * | 1988-05-19 | 1989-11-23 | NOVATECH GmbH Siebe und Technologie für Papier | Toile à deux couches pour la section de formation d'une machine à papier |
EP0342684A3 (fr) * | 1988-05-19 | 1991-08-07 | NOVATECH GmbH Siebe und Technologie für Papier | Toile à deux couches pour la section de formation d'une machine à papier |
EP0345643A3 (fr) * | 1988-06-09 | 1991-08-28 | Nippon Filcon Co., Ltd. | Toile pour papeterie du type usure-trame |
US5103875A (en) * | 1988-06-09 | 1992-04-14 | Nippon Filcon Co., Ltd. | Weft-wear papermaker's fabric with short and long weft crimps |
EP0698682A1 (fr) * | 1994-08-23 | 1996-02-28 | Albany International Corp. | Tissu pour papeterie à trois couches ayant un support pour fibres amélioré |
EP3754107A4 (fr) * | 2018-02-15 | 2021-07-21 | Nippon Filcon Co., Ltd | Tissu industriel à deux couches |
US11286588B2 (en) | 2018-02-15 | 2022-03-29 | Nippon Filcon Co., Ltd. | Industrial two-layer fabric |
Also Published As
Publication number | Publication date |
---|---|
EP0080686B1 (fr) | 1986-04-09 |
DE3146385C2 (de) | 1985-10-31 |
DE3270485D1 (en) | 1986-05-15 |
US4564052A (en) | 1986-01-14 |
DE3146385A1 (de) | 1983-06-01 |
ATE19105T1 (de) | 1986-04-15 |
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