EP0489094B2 - Doppelsieb-former - Google Patents

Doppelsieb-former Download PDF

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Publication number
EP0489094B2
EP0489094B2 EP90913173A EP90913173A EP0489094B2 EP 0489094 B2 EP0489094 B2 EP 0489094B2 EP 90913173 A EP90913173 A EP 90913173A EP 90913173 A EP90913173 A EP 90913173A EP 0489094 B2 EP0489094 B2 EP 0489094B2
Authority
EP
European Patent Office
Prior art keywords
sieve
twin
section
double
zone
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
EP90913173A
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German (de)
English (en)
French (fr)
Other versions
EP0489094A1 (de
EP0489094B1 (de
Inventor
Rudolf BÜCK
Dieter Egelhof
Klaus Henseler
Werner Kade
Albrecht Meinecke
Wilhelm Wanke
Hans-Jürgen WULZ
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.)
JM Voith GmbH
Original Assignee
JM Voith 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=6387558&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0489094(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by JM Voith GmbH filed Critical JM Voith GmbH
Priority to AT90913173T priority Critical patent/ATE86690T1/de
Publication of EP0489094A1 publication Critical patent/EP0489094A1/de
Application granted granted Critical
Publication of EP0489094B1 publication Critical patent/EP0489094B1/de
Publication of EP0489094B2 publication Critical patent/EP0489094B2/de
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
    • D21F9/00—Complete machines for making continuous webs of paper
    • D21F9/003—Complete machines for making continuous webs of paper of the twin-wire type

Definitions

  • the invention relates to a twin-wire former for producing a fibrous web, in particular paper web, from a fibrous suspension.
  • the invention is based on the twin-wire former known from GB-PS 1,125,906. From this publication, the features specified in the preamble of claim 1 are known. In other words, this means that the fibrous web is bathed from the stock suspension fed from the headbox only between two sieve belts. A so-called single-screen pre-dewatering section is therefore missing. In a first section of the twin-wire zone, the two wire belts form a wedge-shaped inlet gap with one another; a material suspension jet coming from the headbox opens into this.
  • This forming shoe is followed (in a second section of the twin-wire zone) by a drainage bar arranged in the other wire loop and behind it a drainage bar arranged in the first wire loop (and formed by a first suction box). Finally, in a third section of the twin-wire zone, several stationary drainage elements designed as flat suction devices follow.
  • twin wire formers of the known type have been trying to produce fibrous webs (in particular paper webs) of the highest possible quality and with relatively high working speeds. Due to the formation of the web between two screens, it is achieved in particular that the finished fibrous web has largely the same properties on both sides (low "two-sidedness"). However, it is difficult to achieve the most uniform possible fiber distribution in the finished fibrous web. In other words, it is difficult to get a good "formation”. Because during the formation of the web there is a constant risk that fibers will clump together into flakes. Efforts are therefore made to form a stock suspension jet that is as free of flakes as possible (e.g. with the aid of a turbulence generator).
  • a curved drainage element arranged in the first section of the twin-wire zone in particular a stationary curved formation shoe designed according to the aforementioned GB-PS 1,125,906, counteracts the risk of flocculation.
  • This also applies to the drainage strips arranged in the GB-PS in the second section of the twin-wire zone. Nevertheless, the risk of flocculation is not completely eliminated in the arrangement according to this GB-PS. Since the number of drainage strips there is very small, a large part of the web formation takes place in the area of the subsequent flat suction boxes.
  • Duoformer D a web formation device known as "Duoformer D” has been developed (TAPPI Proceedings 1988 annual meeting, pages 75 to 80).
  • This known web forming device is part of a twin wire former which has a single wire pre-dewatering zone.
  • a plurality of fixed but adjustable supports are provided in one sieve loop, on the underside of a suction box that drains upwards.
  • a large number of resiliently supported strips are provided in the other wire loop. This resilience of the last-mentioned strips allows the following to be achieved: for example, if the amount of suspension flowing between the two sieve belts is increased, the flexibly supported strips can deviate somewhat.
  • the invention has for its object to design a twin wire former of the type described in such a way that the quality of the fibrous web produced, in particular with regard to formation (viewing), is further improved, and that the twin wire former easily adapts to different operating conditions (for example in terms of quantity and drainage behavior the fiber suspension) is adaptable.
  • twin-wire former according to the invention is insensitive to changes in the amount of suspension supplied and to changes in the dewatering behavior of the fiber suspension. Experiments have shown that the invention succeeds in achieving both a high increase in quality with regard to the formation and good values for the retention of fillers and fines. In contrast, it had to be found again and again in known twin-wire formers that an improvement in the formation was accompanied by a sharp decrease in the retention.
  • a twin wire former is known whose twin wire zone has a curved stationary drainage element in a first section and strips arranged in a second section along a "zigzag line", which are also flexibly supported can and between which a relatively large stock is provided.
  • the twin-wire zone is preceded by a single-wire pre-dewatering zone, in which the web formation initially only occurs in a lower layer of the fiber suspension supplied, while the upper layer remains liquid and tends to form flocs to a very great extent. It has been shown that these flakes cannot be dissolved to the required extent in the subsequent twin-wire zone.
  • Another disadvantage is that the twin-wire zone behind the second section is deflected by a guide roller (14b). This causes (due to the so-called register waltz effect) further uneven drainage across the web width and thus undesirable fluctuations in the web quality (recognizable e.g. from annoying longitudinal stripes).
  • the twin wire former shown in Fig. 1 has a substantially horizontal twin wire zone; this comprises three sections I, II and III arranged one behind the other.
  • the only partially shown endless sieve belts (lower sieve 11 and upper sieve 12) run in the immediate vicinity of a headbox 10 via a breast roller 13 or 14, so that the two sieve belts form a wedge-shaped inlet gap 15 with each other at the beginning of the twin-wire zone.
  • the material jet emitted by the headbox 10 only comes into contact with the two sieve belts 11 and 12 where the lower sieve 11 runs over a stationary, curved forming shoe 16 in the first section I of the twin-wire zone. Its curved tread is formed from a few strips 16 'with drainage slots in between.
  • the existing between the two breast rollers 13 and 14 is variable.
  • the forming shoe 16 can be operated with or without negative pressure.
  • the two wire belts 11 and 12 run between a lower dewatering box 17 and an upper dewatering box 18.
  • the lower drainage box 17 there is a row of at least two strips 27 (preferably with an approximately rectangular cross-section), which are resiliently pressed onto the lower sieve 11 from below.
  • they are supported, for example, by springs 24 (or by pneumatic pressure cushions) on a preferably water-permeable plate 26. It goes without saying that the force of the springs (or the pressure prevailing in the pressure pads) can be individually adjusted.
  • the upper drain box 18 is at both the front and rear ends, as schematically shown with double arrows, suspended on vertically movable support elements. On its underside there is a row of at least three strips 28, preferably with a parallelogram cross-section, which bear against the top of the top sieve 12 and are firmly connected to the box 18. Above the strips 28, a front vacuum chamber 21 and a rear vacuum chamber 22 are provided in the drainage box 18. In the area of the forming shoe 16, part of the water of the fiber suspension is discharged downwards; another part penetrates - due to the tension of the upper sieve 12 - up through the upper sieve and is deflected by the foremost of the strips 28 into the front vacuum chamber 21. The water penetrating upwards between the upper strips 28 reaches the rear vacuum chamber 22.
  • each of the strips 27 and 28 lies in the area of a space between two opposite strips, so that a "zigzag" arrangement is present.
  • the two screens 11 and 12 run on a straight path through section II. A gentle curvature of this path section is also possible; see Figures 2 and 5. Deviating from Fig. 1, the resiliently supported strips could also be arranged in the upper box 18 and the firmly supported strips in the lower box 17.
  • both wire belts 12 and 13 run over a further curved forming shoe 23, which (as shown) is preferably arranged in the lower wire loop 11.
  • An additional bar 29 with a vacuum chamber 30 can be provided behind this in the loop of the top wire 12.
  • Flat suction devices 31 can also be provided in the loop of the lower wire.
  • the top wire 12 can be separated from the bottom wire 11 and from the fibrous web formed by means of a guide roller 19. Bottom wire and fibrous web then run over a wire suction roll 20.
  • the guide roller 19 can also be further back, so that the top wire 12 is only separated from the wire 11 on the wire suction roll 20.
  • two drainage boxes 17 and 18 with the alternately flexible and firmly supported strips 27 and 28 are not in the front or in the rear, but in the middle section II of the twin-wire zone. Because only here can they fully develop their effect, namely intensive dewatering of the fiber suspension supplied while maintaining the fine, flake-free fiber distribution. This is achieved in that the screen belt in question undergoes a slight (barely visible) deflection on each bar, so that turbulence is repeatedly generated in the still liquid part of the fibrous material. For success, however, it is also crucial that prior to this, in section I, a pre-dewatering, known per se, takes place on both sides and that this also takes place with the flock-free state of the fiber suspension being maintained as far as possible.
  • a stationary curved forming shoe will always be provided in the first section I of the twin-wire zone (according to FIGS. 1 and 3 to 5) if the highest quality requirements with regard to the formation are important.
  • This effect of the forming shoe is based on the fact that at least a sieve belt runs polygon-like from bar to bar, with each bar not only draining water, but also creating turbulence in the still liquid material. With such a forming shoe, however, it is sometimes difficult to achieve a stable operating state when starting up the paper machine. It can therefore be advantageous, according to FIG. 2, to provide a known forming roller 40 instead of the stationary forming shoe and the breast roller lying in front of it in section I. This option will be used when the highest productivity is required of the paper making machine.
  • the bar 29 already mentioned can either be used solely for the drainage of water upwards or in addition for the renewed generation of turbulence (for the purpose of further quality improvement). The latter is possible if at this point part of the fibrous material is still in a liquid state.
  • FIGS. 1 to 3 the distance between the two sieves 11 and 12 is drawn in an exaggerated manner in the twin-wire zone. This should make it clear that the two screens 11 and 12 converge towards one another over a relatively long distance within the twin-wire zone. This makes it clear that the process of forming the web on the first forming shoe 16 (in section I) starts relatively slowly and only ends in section III.
  • the end of the main dewatering zone, in which the two sieves converge, (and thus the end of the web formation process) can be, for example, approximately in the middle of the looping zone of the second forming shoe 23, as is shown only by way of example in FIGS. 1 to 3.
  • the end of the sieve convergence is symbolically represented by the point E; there the dry matter content of the paper web has reached approximately 8%. However, this point can also be on one of the flat suction cups 31, for example. Beyond this point, you try to find the dry content, preferably before separating the two Sieves to increase still further.
  • One goal is namely that the sieving takes place with the highest possible dry web content, so that as few fibers as possible are torn out of the web during the separation.
  • the type and number of the dewatering elements required for this within the twin-wire zone can, however, be very different and depends, among other things, on the type of paper and its raw material components as well as on the working speed.
  • the exemplary embodiments shown in FIGS. 2 and 3 differ from the others primarily in that the twin-wire zone rises essentially vertically from bottom to top in the direction of wire travel. This simplifies the removal of the water extracted from the fiber suspension; because the water can be drained off evenly to both sides.
  • the middle section II of the twin wire zone in particular, no vacuum chambers are required.
  • the forming roller 40 of FIG. 2 is generally designed as a suction roller.
  • the forming shoes 16, 23, in particular those arranged in the third section III, can be provided with a suction device if necessary.
  • FIG. 2 Further elements of the twin-wire former shown in FIG. 2 are water collecting containers 41, 42 and 43, guide plates 44 assigned to the fixed strips 28 and a water discharge strip 45. The remaining elements are provided with the same reference numerals as the corresponding elements in FIG. 1. The same applies to the FIG. 3.
  • a conceivable modification of FIG. 3 can consist in that a forming roll is arranged instead of the screen suction roll 20 and the screen suction roll is arranged instead of the guide roll 19.
  • a similar arrangement is known from DE-GM 88 06 036 (Voith file: P 4539). with this exception and apart from the embodiment according to FIG.
  • the invention will - whenever possible - be used to design the twin-wire former in such a way that one does without the relatively expensive forming roller (in terms of acquisition and operation) can.
  • the screen suction roll 20 is usually present as the only suction roll. Furthermore, it can be ensured in all embodiments of the invention that there is no guide roller deflecting the twin-wire zone (with the above-mentioned harmful register roller effect).
  • the exemplary embodiment in FIG. 4 differs from FIG. in that in the first section I of the twin-wire zone in the loop of the lower wire 11 behind a first curved stationary forming shoe 16 there is a second curved stationary forming shoe 16a at a distance.
  • a single bar 50 is arranged in the loop of the upper wire 12 in the area between the two stationary forming shoes 16 and 16a, which is a component of a vacuum chamber 51 in a known manner.
  • This vacuum chamber is, similar to the upper drainage box 18 of FIG. 1, on its front and hung at its rear end in vertically movable brackets.
  • the strip 50 is used only for water removal, and if the depth of penetration is greater, it is also used to generate turbulence in the suspension and thus to improve the formation.
  • the presence of two separate forming shoes 16 and 16a temporarily interrupts the drainage on both sides; it is only continued after the bar 50 has removed the water which has penetrated upwards on the first forming shoe 16 from the top wire 12. This enables higher working speeds.
  • each bar has its own support body 55/56.
  • the lower strip support bodies 55 are pivotally mounted, the strip 57 being resiliently pressed against the underside of the lower sieve 11 under the force of springs 54.
  • the support body 56 of each of the upper strips 58 like that of the strip 50, is designed as a vacuum chamber.
  • the suspension of these vacuum chambers 56 corresponds to that of the vacuum chamber 51. It is important that each of the strips 57 and 58 rests on its screen belt 11 and 12 with a certain contact pressure (corresponding to the suspension pressure).
  • the setting of the strips 57 and 58 is carried out such that a wine deflection of the sieve belts preferably takes place on each strip. Thanks to the resilient support of the lower strips 57, the setting once made is insensitive to changes in the quantity or quality of the fabric, so that no back pressure forms in front of the strips and that turbulence forces are nevertheless effectively introduced into the fiber suspension.
  • FIGS. 1 to 3 there is the possibility of individually adjusting each of the strips 57/58 with regard to altitude and inclination relative to the wire frame. This makes it even easier to influence the quality of the paper produced, both in terms of formation and in terms of surface quality (printability).
  • the upper strips 58 could be flexible and the lower strips 57 could be firmly supported.
  • Another alternative could be that not only the upper ledges 58 but also the lower ledges 57 are secured in vertically displaceable brackets (as shown on the vacuum chamber 51). In this case, the springs 54 can be possibly omit.
  • FIGS. 1 and 4 Another difference between FIGS. 1 and 4 is that in FIG. 4 the twin-wire zone rises from bottom to top in the direction of wire travel with an inclination of on average about 20 ° with respect to the horizontal. This enables the overall height of the twin wire former to be kept relatively low.
  • the third section III of the twin-wire zone not a curved, but a flat forming shoe 23 'is provided, in contrast to FIG. 1.
  • the separation of the top wire 12 from the bottom wire and from the fibrous web formed can take place on one of the flat suction devices 31, as in FIG. Instead, however, the top wire 12 can also be guided up to the wire suction roll 20. There, as shown, it can loop around a small part (or alternatively a larger part) of the circumference of the screen suction roll and then be returned via the deflection roll 19.
  • the twin-wire zone as a whole extends essentially in the horizontal direction.
  • the individual elements are essentially the same as in the exemplary embodiment according to FIG. 4.
  • one difference is that the drainage strips 57 and 58 located in the second section II of the twin-wire zone are arranged along a downwardly curved section of the twin-wire zone.
  • an upwardly curved forming shoe 16, 23 is provided in the first section I and in the third section III of the twin-wire zone. This embodiment is particularly recommended for the modernization of existing Fourdrinier paper machines.
  • n flexibly supported strips 27/57 and n + 1 firmly supported strips in the second section II of the twin-wire zone there are preferably n flexibly supported strips 27/57 and n + 1 firmly supported strips in the second section II of the twin-wire zone.
  • the number of flexibly supported strips it is also possible to make the number of flexibly supported strips the same or one greater than the number of firmly supported strips.
  • an inlet or outlet edge of a drainage box could also be provided.
  • the minimum number n of flexibly supported strips is two (see Fig. 4). However, three or four flexibly supported strips are preferred.

Landscapes

  • Paper (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Organic Insulating Materials (AREA)
EP90913173A 1989-08-22 1990-08-09 Doppelsieb-former Expired - Lifetime EP0489094B2 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90913173T ATE86690T1 (de) 1989-08-22 1990-08-09 Doppelsieb-former.

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE3927597A DE3927597A1 (de) 1989-08-22 1989-08-22 Doppelsieb-former
DE3927597 1989-08-22
PCT/EP1990/001313 WO1991002842A1 (de) 1989-08-22 1990-08-09 Doppelsieb-former

Publications (3)

Publication Number Publication Date
EP0489094A1 EP0489094A1 (de) 1992-06-10
EP0489094B1 EP0489094B1 (de) 1993-03-10
EP0489094B2 true EP0489094B2 (de) 1996-08-14

Family

ID=6387558

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90913173A Expired - Lifetime EP0489094B2 (de) 1989-08-22 1990-08-09 Doppelsieb-former

Country Status (8)

Country Link
EP (1) EP0489094B2 (no)
JP (1) JP2898752B2 (no)
BR (1) BR9007185A (no)
CA (1) CA2053239C (no)
DE (2) DE3927597A1 (no)
ES (1) ES2040604T5 (no)
NO (1) NO178832C (no)
WO (1) WO1991002842A1 (no)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1936026A1 (de) 2006-12-21 2008-06-25 Voith Patent GmbH Nassteil für eine Maschine zur Herstellung von Faserstoffbahnen, insbesondere Papiermaschine zur Herstellung holzfreier Papiere

Families Citing this family (34)

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Publication number Priority date Publication date Assignee Title
US5389206A (en) * 1989-08-22 1995-02-14 J. M. Voith Gmbh Twin wire former
DE4002305C2 (de) * 1990-01-26 1996-02-22 Voith Sulzer Papiermasch Gmbh Entwässerungsvorrichtung an einem Doppelsiebformer
DE4005420C2 (de) * 1990-02-21 1995-06-08 Voith Gmbh J M Doppelsiebformer
FI91788C (fi) * 1990-09-12 1994-08-10 Valmet Paper Machinery Inc Paperikoneen kaksiviirainen rainanmuodostusosa
FI93032C (fi) * 1991-03-15 1995-02-10 Valmet Paper Machinery Inc Paperikoneen kaksiviirainen rainanmuodostusosa
DE4117597A1 (de) * 1991-05-29 1992-12-03 Voith Gmbh J M Doppelsiebformer fuer eine papiermaschine
US5201999A (en) * 1991-06-10 1993-04-13 Beloit Technologies, Inc. Twin wire forming apparatus
FI90673C (fi) * 1991-06-26 1994-03-10 Valmet Paper Machinery Inc Paperikoneen kaksiviirainen rainanmuodostusosa
FI93128C (fi) * 1991-07-19 1995-02-27 Tampella Papertech Oy Paperikoneen kaksiviirainen rainanmuodostusosa
DE4141607C2 (de) * 1991-12-17 1996-04-25 Voith Gmbh J M Doppelsiebformer
FI920228A0 (fi) * 1992-01-17 1992-01-17 Valmet Paper Machinery Inc Banformningsparti foer pappersmaskin.
FI99033C (fi) * 1993-05-18 1997-09-25 Valmet Paper Machinery Inc Paperikoneen rainanmuodostusosa
US5573643A (en) * 1992-01-17 1996-11-12 Valmet Corporation Twin wire web former in a paper machine
DE4208681A1 (de) * 1992-03-18 1993-09-23 Escher Wyss Gmbh Nassteil einer doppelsieb-papiermaschine
DE4219292A1 (de) * 1992-06-12 1993-12-16 Escher Wyss Gmbh Doppelsiebformer
DE9212448U1 (no) * 1992-09-16 1992-11-05 J.M. Voith Gmbh, 7920 Heidenheim, De
DE4301103C1 (de) * 1993-01-18 1994-08-18 Voith Gmbh J M Siebpartie einer Papiermaschine
DE4332162C2 (de) * 1993-09-22 1994-12-01 Voith Gmbh J M Doppelsiebformer einer Papiermaschine
DE4402273C2 (de) * 1994-01-27 1995-11-23 Voith Gmbh J M Papiermaschine zur Herstellung mehrlagiger Papierbahnen
DE4420801C2 (de) * 1994-06-16 1997-01-30 Voith Gmbh J M Verfahren zum Betreiben einer Doppelsiebzone einer Papiermaschine zur Herstellung von Faserstoffbahnen sowie Siebzone hierzu
JP3181202B2 (ja) * 1995-03-27 2001-07-03 三菱重工業株式会社 抄紙機ツインワイヤフォーマの脱水機器
DE19632509A1 (de) * 1996-08-13 1998-03-05 Voith Sulzer Papiermasch Gmbh Verfahren und Vorrichtung zum Herstellen einer Faserstoffbahn
DE19651241A1 (de) * 1996-12-10 1998-06-18 Voith Sulzer Papiermasch Gmbh Doppelsieb-Blattbildungseinrichtung
DE19652485A1 (de) * 1996-12-17 1998-06-18 Voith Sulzer Papiermasch Gmbh Siebpartie und Verfahren zum Entwässern einer Faserstoffbahn in einer Siebpartie
US6235158B1 (en) 1996-12-23 2001-05-22 Voith Sulzer Papiermaschinen Gmbh Suction forming roll n double screen method and machine for the manufacture of a fibrous material web
JP3422649B2 (ja) 1997-04-15 2003-06-30 三菱重工業株式会社 抄紙機ツインワイヤフォーマの脱水機器
DE19803591A1 (de) 1998-01-30 1999-08-05 Voith Sulzer Papiertech Patent Doppelsieb-Former
DE19903943A1 (de) * 1999-01-28 2000-08-03 Voith Sulzer Papiertech Patent Verfahren und Vorrichtung zum Bilden einer Faserstoffbahn
US6372091B2 (en) * 1999-06-18 2002-04-16 Metso Paper, Inc. Method and apparatus for forming a paper web
DE10022110B4 (de) 2000-05-08 2007-10-25 Dieter Ronnenberg Beeinflussung eines Bahneigenschafts-Profiles mittels mindestens eines Schallfeldes
US7364643B2 (en) * 2002-08-23 2008-04-29 Metso Paper, Inc. Forming of a paper or board web in a twin-wire former or in a twin-wire section of a former
FI124698B (fi) 2004-01-15 2014-12-15 Valmet Technologies Inc Sovitelma paperikoneessa
DE102005047347A1 (de) * 2005-09-30 2007-04-12 Voith Patent Gmbh Verfahren zur Herstellung einer Faserstoffbahn und Blattbildungssystem zur Durchführung des Verfahrens
DE102005047628A1 (de) * 2005-10-05 2007-04-12 Voith Patent Gmbh Doppelsiebformer einer Maschine zur Herstellung einer Faserstoffbahn

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US3438854A (en) * 1964-10-29 1969-04-15 Time Inc Dual wire paper forming apparatus and suction box therefor
DE3153305C2 (de) * 1981-09-04 1986-10-23 Sulzer-Escher Wyss GmbH, 7980 Ravensburg Entwässerungseinheit für Langsieb-Papiermaschinen
AT387410B (de) * 1983-06-09 1989-01-25 Escher Wyss Gmbh Stoffauflauf fuer eine papiermaschine
DE3535849A1 (de) * 1985-10-08 1987-04-09 Voith Gmbh J M Stellvorrichtung fuer eine lippe eines papiermaschinen-stoffauflaufs
DE3628282A1 (de) * 1986-08-20 1988-02-25 Voith Gmbh J M Stationaere stuetzvorrichtung
GB8710428D0 (en) * 1987-05-01 1987-06-03 Beloit Corp Multi-ply web forming apparatus
DE8806036U1 (no) * 1988-05-06 1988-06-23 J.M. Voith Gmbh, 7920 Heidenheim, De

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1936026A1 (de) 2006-12-21 2008-06-25 Voith Patent GmbH Nassteil für eine Maschine zur Herstellung von Faserstoffbahnen, insbesondere Papiermaschine zur Herstellung holzfreier Papiere

Also Published As

Publication number Publication date
DE3927597A1 (de) 1991-02-28
NO914134D0 (no) 1991-10-21
DE59001020D1 (de) 1993-04-15
ES2040604T5 (es) 1996-10-16
JPH04507439A (ja) 1992-12-24
BR9007185A (pt) 1991-11-26
NO178832B (no) 1996-03-04
CA2053239A1 (en) 1991-02-23
CA2053239C (en) 1996-06-25
WO1991002842A1 (de) 1991-03-07
JP2898752B2 (ja) 1999-06-02
EP0489094A1 (de) 1992-06-10
NO178832C (no) 1996-06-12
NO914134L (no) 1991-10-21
EP0489094B1 (de) 1993-03-10
ES2040604T3 (es) 1993-10-16

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