US20040060676A1 - Method for the manufacture of paper, in particular of coated fine paper, and a paper machine line in particular for the manufacture of coated fine paper - Google Patents

Method for the manufacture of paper, in particular of coated fine paper, and a paper machine line in particular for the manufacture of coated fine paper Download PDF

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Publication number
US20040060676A1
US20040060676A1 US10/416,320 US41632003A US2004060676A1 US 20040060676 A1 US20040060676 A1 US 20040060676A1 US 41632003 A US41632003 A US 41632003A US 2004060676 A1 US2004060676 A1 US 2004060676A1
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Prior art keywords
paper
drying
web
section
machine line
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Abandoned
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US10/416,320
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English (en)
Inventor
Johan Gron
Pentti Rautiainen
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Valmet Technologies Oy
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Metso Paper Oy
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Assigned to METSO PAPER, INC. reassignment METSO PAPER, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GROEN, JOHAN, RAUTIAINEN, PENTTI
Publication of US20040060676A1 publication Critical patent/US20040060676A1/en
Assigned to VALMET TECHNOLOGIES, INC. reassignment VALMET TECHNOLOGIES, INC. CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: METSO PAPER, INC.
Abandoned legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/46—Pouring or allowing the fluid to flow in a continuous stream on to the surface, the entire stream being carried away by the paper
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/30—Pretreatment of the paper

Definitions

  • the invention relates to a method for the manufacture of paper, in particular of coated fine paper, according to the preamble of claim 1.
  • the invention also relates to a paper machine line in particular for the manufacture of coated fine paper according to the preamble of claim 10.
  • fine paper is usually meant either uncoated fine paper or coated fine paper.
  • the basis weight of uncoated fine paper is usually 40 to 230 g/m 2 , that of coated fine paper 60 to 250 g/m 2 .
  • Typical pulp for the manufacture of fine paper comprises chemical fibres: short fibres which are obtained, for example, from birch and eucalyptus, and a long-fibre material obtained from softwood trees is generally added to this.
  • the proportion of mechanical pulp is generally below 40%.
  • About 10 to 30% of filler is added to the pulp, and the filler may be calcium carbonate, kaolin and/or other suitable mineral pigments.
  • Recently, in the manufacture of fine paper increasing use has also been made of recycled fibres.
  • the papermaking line is conventionally designed so that each process step adds certain properties to the paper to achieve a certain quality.
  • this target is to create an even and closed paper surface without large variations in pore size.
  • the surface smoothness or topography needs to be reduced in order to allow a uniform image to be printed on the paper. This is done by creating a desired base sheet structure before surface treating the sheet (e.g. coating and calendering).
  • each process step adds to the final paper quality and also to the required length of the production line. For example, there has been no possibilities to upgrade woodfree papermaking lines with surface sizing capabilities to produce high quality coated grades without adding surface treating equipment and additional length to the line. Such a rebuild requires additional space in online solutions and especially for offline surface treatment solutions.
  • coated woodfree fine paper includes gloss, smoothness, bulk, opacity, and brightness, typically:
  • the headbox spreads the formed pulp suspension evenly onto a wire section, in which dewatering and couching of the web begin.
  • wire sections or formers, known in themselves to a person skilled in the art; as fourdrinier formers, hybrid formers, and gap formers.
  • a gap former has become common in which a slice jet produced by a headbox is fed between two wires and the bulk of the water is removed between said wires in two directions.
  • One gap former arrangement has been described in the paper read by L. Verkasalo: Efficient Forming at High Speeds, XI Valmet Paper Technology Days 1998.
  • the fibre and filler distribution in the thickness direction of the web can be controlled to a limited degree, for example, by means of placement and vacuums of the dewatering elements of the former.
  • the fillers often accumulate on the surfaces of the web in dewatering stages.
  • Multi-layer headboxes In prior art there are also known multi-layer headboxes, one of them having been described, for example, in the paper read by M. Odell: Multilayering, Method or Madness?, XI Valmet Paper Technology Days 1998 and in FI patent 92 729, and one of them having also been described in the paper read by P. Ahonen: Challenges for Digital Printing Paper, XI Valmet Paper Technology Days 1998. Multi-layer headboxes allow desired layer structures to be produced in the web by feeding stock in layers between wires.
  • the web is passed from the wire section to a press section where water is removed from the web by pressing it against one or two felts.
  • a press based on roll nips marketed by the applicant under the trademark SymPress IITM.
  • SymPress IITM a press based on roll nips
  • the dryer section in fine paper machines known in prior art has most commonly been formed of a dryer section which uses conventional single- and/or twin-wire draw and in which drying takes place mainly as cylinder drying while the wire presses the web against a heated cylinder surface.
  • drying takes place mainly as cylinder drying while the wire presses the web against a heated cylinder surface.
  • single-wire draw through the entire dryer section has become common in recent years.
  • the patent application PCT/FI98/00945 has proposed combining impingement drying with cylinder drying in order to provide a higher evaporation rate and a shorter dryer section.
  • the paper web is passed from the dryer section to a precalender, which in known arrangements may be a calender with hard or soft nips, in which the paper web is passed through the nip between rolls to provide smoothness to the surface of the paper web.
  • a so-called soft calender has become common which comprises a soft coated roll and a hot hard-faced thermo roll.
  • loose fibres and other stock components are also fixed to the surface of the web, but, at the same time, differences in density may also be caused in the base paper and some of the bulkiness of the web important to many grades may be lost.
  • a surface sizing or pigmenting unit In surface sizing, the surfaces of the web are treated with a starch or pigment solution in a film size press, for example, by means of an applicator device marketed by the applicant under the trademark OptiSizerTM, SymSizerTM. Surface sizing, pigmenting, or coating is performed at this stage typically on both sides of the web at the same time, but the surfaces of the web can also be treated separately in successive units.
  • the paper web is dried by using infrared dryers and airborne web-dryers as well as a subsequent cylinder group or groups, and the paper web is reeled by means of a machine reel-up.
  • Different coating devices are known in prior art, such as, for example, coating devices of the blade coating, jet, film transfer or non-contact application techniques such as the spray type.
  • a coating agent is transferred by means of the coating device freely to the surface of the web either as a continuous jet (jet) or as drops (spray) or the coating agent is applied by a roll.
  • one side of the paper web is precoated first, after which there is a dryer section, and after that the other side of the paper web is precoated, which is followed by a dryer section.
  • the coating of the thus produced precoated web is completed by coating it with other coating layers and, after that, the web is dried, and wound up.
  • the dryer part of the coating station typically comprises first a unit which is not in contact with the web, for example, an infrared dryer, and a cylinder group located after that.
  • the web is unwound and calendered by means of a supercalender or a multinip calender with the trademark OptiLoadTM, which imparts a desired level of smoothness and gloss to the web. Reeling ends the fine paper machine line.
  • OptiReelTM One reel-up known in prior art is the reel-up marketed by the applicant under the trademark OptiReelTM
  • An object of the invention is to provide a method and a paper machine for fine paper, in particular for CWF fine paper, i.e. coated woodfree (Coated Wood Free) fine paper, in which operations take place on-line, especially suitable for a rebuild.
  • CWF fine paper i.e. coated woodfree (Coated Wood Free) fine paper
  • An object of the invention is to provide a method of upgrading a paper machine without adding length to the paper machine.
  • An object of the invention is to provide a method and a paper machine for the manufacture of fine paper in which the change of grade is fast.
  • the fast change of grade allows short delivery times so that different paper grades can be produced at a higher production and cost efficiency (e.g. raw material savings etc.).
  • an object of the invention is to provide a method and a paper machine for the manufacture of fine paper allowing different profile control arrangements.
  • the paper machine line according to the invention is in turn mainly characterized in what is set forth in the characterizing part of claim 10.
  • the invention comprises of a more compact and novel way of building the structure of the coated paper to achieve the same target as for conventionally multiple coated papers.
  • the vital parts of the invention can also be utilised to upgrade a papermaking line from surface sized to coated woodfree grades.
  • the invention utilises the possibility to initially reduce the openness of the base sheet structure through fiber and/or filler layering. Then, the sheet-forming step ensures excellent formation values and porosity levels.
  • the dewatering will be done to ensure the web support, the evensidedness and a low web draw at the transfer to the drying section.
  • the after-drying section will be equipped with impingement units to intensify and to make the drying process more compact.
  • the precalendering process has previously been questioned regarding its necessity.
  • a novel way of reinforced precalendering the paper prior to coating utilises high surface temperatures of the thermo roll, possible a long nip and external/initial sheet moisture, which provide possibilities to close the sheet surface resulting from the gradient calendering.
  • the elevated moisture is used to avoid too extensive drying of the sheet and to initiate a gradient calendering phenomena.
  • By closing the sheet and creating a very smooth surface prior to coating the coating color remains on the paper surface and evenly covers the base sheet.
  • the smoothness development prior to coating leaves mainly the gloss development to be done in the final calendering step.
  • the final calendering can be done with a multinip calender at high thermo roll temperatures and an even nip load distribution throughout the calender stack.
  • the multinip calender applied in the invention is a calender with more than one calendering nip.
  • the multinip calender has a tendency for drying the paper sheet due to high thermo roll surface temperatures in a high number of nips, for which reason a higher sheet moisture level going into the calender than conventional calenders is used.
  • the moisture content of the sheet going into the calender is approximately 3% higher than the target for the final sheet.
  • Color sticking onto calender rolls becomes a problem at sheet moisture of 7-8% for blade coated paper and 11-12% for film coated.
  • the online surface treatment solutions based on film coating technology reduces the runnability risks in the calender.
  • One or more reinforced-nip precalender (OptiDwellTM, OptiGlossTM, OptiSoftTM)
  • thermo rolls ⁇ 250° C.
  • long reinforced-nip ⁇ 30 mm
  • the polymer roll covers allows high surface temperatures.
  • the nip loading system allows an even loading and control of each roll nip separately.
  • layering of additives and fillers is used in a headbox instead of precoating carried out in a finishing section in order to reduce the pore size distribution in the surface layers of a paper web.
  • additives and/or fillers are introduced into the surface layers of stock, it is possible to provide, for example, a U-shaped thickness direction profile of the filler.
  • the stock is divided into three different stock flows for surface layers and for a middle layer, each of which is supplied with desired additives and fillers, starch in particular, in order to provide different layer structures.
  • additives and fillers can be fed into the stock flow from several different points or in several different stages.
  • fines can also be added.
  • layering of fibres in which fibre stock is divided into separate components for the surface and middle layers such that a desired type of fibre stock is passed to a surface layer and to a middle layer, respectively.
  • retention agents which bind the fillers and fines to the surface, which prevents them from being carried away from the surface layers along with water.
  • the retention agent may also be supplied in layers.
  • the invention uses the headbox marketed by the applicant under the trademark OptiFloTM or a similar type of headbox, in which the basis weight profile can be controlled by consistency adjustment and the fibre orientation can be affected by adjusting the profile.
  • OptiFloTM headbox marketed by the applicant under the trademark OptiFloTM
  • layering, layering of additives or fillers in respect of which reference may be made, for example, to the applicant's EP patent 651 092.
  • the former As the former is used a gap former which allows higher speeds than other types of formers and carries out dewatering on two sides, whereby symmetric paper is obtained.
  • a gap former of this kind may be mentioned, for example, the wire section marketed by the applicant under the trademark OptiFormerTM or a similar type of former, one of them having been described, among other things, in the paper read by L. Verkasalo: Efficient Forming at High Speeds, XI Valmet Paper Technology Days 1998.
  • the fine paper manufacturing line according to the invention makes use of extended nip pressing.
  • a so-called shoe press provides good bulk and high dry solids and the lowest possible asymmetry in the web.
  • OptiPressTM press section When using, for example, the applicants double-felted OptiPressTM press section, symmetric dewatering and a web having symmetric surface properties are achieved.
  • the dryer section employs both cylinder and impingement drying, one of such dryer sections being described, for example, in the international patent application PCT/FI98/00945.
  • a dryer section marketed by the applicant under the trademark OptiDryTM or a similar type of dryer section is used.
  • Impingement drying also allows more efficient control of the moisture profile than conventional cylinder drying alone.
  • HiRunTM is advantageously used to improve web transfer and allows a considerable reduction of draw between the press-section and the first drying group. The draw reduction provides a considerable reduction of paper web porosity.
  • nip precalender for example a precalender marketed by the applicant under trademark OptiDwellTM, OptiGlossTM, OptiSoftTM or a similar type of calender is used. Also a 2- or 4-nip hot soft calender including moisturizing can be used.
  • precalendering is followed by film coating unit.
  • the function of coating is to close surface and thereby considerably reduce the pore size to maintain the ink layer ( ⁇ 1 ⁇ m thick) on the paper surface.
  • Pigment combinations can be used to improve optical properties of the paper surface.
  • Layering serves as precoat and this layer as topcoat in the invention.
  • a film coating unit marketed by the applicant under the trademark OptiSizerTM or a similar type of unit is used which also allows profile control of the amount of surface size/pigment.
  • a compact machine circulation system marketed by the applicant by the trademark OptiDoserTM can be used to considerable reduce the color flow to the film coater application units with up to 80%. This allows faster and more flexible grade changes.
  • the coating is followed by a dryer section mainly applying contact-free drying, which allows a fast grade change.
  • the contact-free drying is followed by a short cylinder group which in itself serves to affect primarily the stabilization of the travel of the web, the draw and tension of the web while the drying process is continued at the same time.
  • the cylinder group may comprise single-wire or twin-wire draw, however, most advantageously single-wire draw.
  • the fine paper machine line ends in a reel-up. It is most preferably a reel-up marketed by the applicant under the trademark OptiReelTM or the type of reel-up which produces low amounts of bottom broke and provides a roll of a high standard to ensure its problem-free further processing.
  • Suitable automatic and measuring devices are incorporated into the method and the paper machine for manufacturing fine paper in accordance with the invention, for example, for the purpose of determining and correcting longitudinal and cross direction profiles of the web or for the purpose of performing a fast grade change.
  • a measuring device for example, a transverse beam which comprises several sensors or scanners and, at the same time, it is possible to measure machine direction variation, for example, by means of scanning devices.
  • profiling devices are used as devices.
  • the basis weight can be profiled by adjusting the consistency in the headbox.
  • a steam box can be used for increasing and profile control of dry solids. Impingement drying allows profile control of drying.
  • a moistening device for profile control of dry solids, and in sizer types of coaters surface size/the amount of coating can be measured separately for each paper side which allows profiling of the color film. It is easy to combine profile control with non-web-contacting drying.
  • a moistering device which is based on steam or water mist.
  • FIG. 1 schematically one example of a paper machine known in prior art.
  • FIG. 2 schematically shows one example of a paper machine application in accordance with the invention.
  • FIG. 3 schematically shows influence of forming concepts on woodfree base paper beta-formation and porosity.
  • FIG. 1 a conventional paper making line concept for double coated fine paper is shown.
  • First stock is fed from a headbox 100 ′ to a wire section 200 ′, which is followed by a press section 300 ′ with two press nips 350 ′, 360 ′.
  • the web W′ is passed from the press section 300 ′ to a predryer section 400 ′, in which single-wire draw groups R′ and impingement drying 450 ′ are used.
  • the impingement drying units 450 ′ are formed of a large-diameter cylinder 420 ′ placed in a basement space and of an impingement drying apparatus 422 ′ placed in connection therewith.
  • the predryer section 400 ′ is followed a calender 500 ′ that is a hard or a soft calender. It is followed by a precoating station 600 ′ based on film transfer applying roll application for surface sizing/pigmenting/precoating of the web, and by an after-dryer section 650 ′, which is composed of a section 660 applying contact-free drying (infrared drying, airborne web-drying) and of a cylinder group 670 ′.
  • the web is coated in coating stations 700 ′, 800 ′, in which one side of the web is first coated in the first coating station 700 ′, which side is dried in a dryer unit 750 ′ using contact-free drying 760 ′, after which there is a cylinder group 770 ′.
  • the other side of the web is coated in the second coating station 800 ′, which is followed by a dryer section 850 ′ which mainly applies contact-free drying 860 ′, after which there is a short cylinder group 870 ′.
  • This is followed by a multinip calender 900 ′ in which the paper web is calendered so as to have desired gloss and smoothness.
  • the web is reeled into rolls by means of a reel-up 1000 ′.
  • the length L′ of this concept according to prior art shown in this figure is approximately 169800 mm.
  • the travel of the paper web W is as follows.
  • the stock is fed from the headbox 100 using multilayering technology with fiber or additives to the forming section with loadable blades into a gap between forming rolls 210 , 220 of the gap former 250 of the wire section 200 , from which it is passed between wires via the dewatering devices of the gap former 250 further to the press section 300 while supported by a wire.
  • the press section 300 comprises two presses 350 and 360 and the web W is passed on an upper fabric of the first press, while supported by a lower fabric, so as to be between the press rolls of the press 350 .
  • the web W is passed onto an upper fabric of the next press 360 and further between the upper fabric and a lower fabric so as to be between the press rolls of the press 360 .
  • the web W is passed from the press section 300 to the dryer section 400 , in which the web W is dried, while supported by drying wires, in the impingement drying groups 450 and in the drying groups R that apply single-wire draw.
  • the reference numeral 415 designates the drying wire
  • the reference numeral 410 designates heated drying cylinders in an upper row
  • the reference numeral 411 designates reversing cylinders or rolls in a lower row.
  • the web W runs meandering from the reversing cylinders/rolls 411 of the lower row onto the heated drying cylinders 410 of the upper row, on which the web W is in direct contact with the heated cylinder surface.
  • the inpingement drying units 450 are formed of a large-diameter cylinder 420 placed in a basement space and of an impingement drying apparatus 422 placed in connection therewith. For the sake of clarity, the above-noted signs have been indicated only in connection with one drying group.
  • the web W is passed to the precalender 500 with two-reinforced calender nips 540 , 550 .
  • Rolls of the film coating unit 600 are denoted with the reference numerals 645 and 647 and the reference numerals 648 and 649 designate film transfer equipment of the coating unit.
  • the web W is passed through a first contact-free drying and turning device 660 via a second contact-free drying device, for example, an infrared/airborne web-dryer 665 to the drying group 670 which applies single-wire draw and which comprises a drying wire 651 and heated drying cylinders 610 as well as reversing cylinders/rolls 611 .
  • the web W is passed to the on-line multi-nip calender 900 .
  • the calender 900 the web W is passed to the reel-up 1000 , in which the paper web W is reeled into paper rolls.
  • the length L of this paper making line is approximately 143100 mm.
  • Base paper Roll-nip precalendering (soft/hard) Linear load (kN/m) 60 60 150 150 Surface temperature, steel roll (° C.) 50 100 50 100 Density (kg/m 3 ) 585 685 691 721 731 Moisture (%) 4.2 4.1 3.6 3.9 3.6 PPS roughness, ts/ws ( ⁇ m) 6.26/8.17 6.20/5.65 6.15/5.52 6.07/5.08 5.90/5.12 Bendtsen smoothness, ts/ws (ml/min) 510/710 505/400 509/385 510/250 515/260 Bendtsen air leakage (ml/min) 250 241 235 231 221 Cobb-Unger oil absorption, ts/ws 21.0/16.5 20.1/14.2 19.5/13.6 19.9/14.3 19.4/13.1 (g/m 2
  • FIG. 3 In FIG. 3 is shown influence of forming concepts, e.g. loadable blade (LB) and multifoil shoe (Shoe) units on woodfree base paper beta-formation and porosity.
  • loadable blade (LB) and multifoil shoe (Shoe) units on woodfree base paper beta-formation and porosity.
  • the porosity on x-axis and on y-axis is beta-formation and with black squares are shown results with loadable blade units and with grey squares loadable blade roll furnish and with grey squares with x are shown multifoil shoe units.

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US10/416,320 2000-11-09 2001-11-09 Method for the manufacture of paper, in particular of coated fine paper, and a paper machine line in particular for the manufacture of coated fine paper Abandoned US20040060676A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US24691900P 2000-11-09 2000-11-09
PCT/FI2001/000976 WO2002038858A2 (fr) 2000-11-09 2001-11-09 Procede de fabrication de papier fin couche et ligne de fabrication de papier fin couche

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US20040060676A1 true US20040060676A1 (en) 2004-04-01

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US (1) US20040060676A1 (fr)
EP (1) EP1337705B1 (fr)
AT (1) ATE349566T1 (fr)
AU (1) AU2002214076A1 (fr)
DE (1) DE60125582T2 (fr)
WO (1) WO2002038858A2 (fr)

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US20060102309A1 (en) * 2002-11-04 2006-05-18 Vesa Ahvenniemi Arrangement in the on-line finisching of the paper machine
US20060115634A1 (en) * 2004-11-30 2006-06-01 Park Chang S Resin coated papers with imporved performance
WO2007110472A1 (fr) * 2006-03-28 2007-10-04 Metso Paper, Inc. Procédé et appareil de fabrication de papier ou de carton couché
WO2008092997A2 (fr) * 2007-01-31 2008-08-07 M-Real Oyj Procédé de production de papier
US20090151883A1 (en) * 2006-05-02 2009-06-18 Daio Paper Corporation Method of Manufacturing Coated Paper
US20100006251A1 (en) * 2004-01-27 2010-01-14 Voith Paper Patent Gmbh. Method and arrangement for the production of a wood-free coated, matte or semi-matte paper web
US20120138249A1 (en) * 2010-12-02 2012-06-07 Patrick Sundholm Method for improving paper and board's resistance to the penetration of liquids
US20160017543A1 (en) * 2012-12-12 2016-01-21 Munksjö Oyj Method of Manufacturing Glassine Paper
US9481777B2 (en) 2012-03-30 2016-11-01 The Procter & Gamble Company Method of dewatering in a continuous high internal phase emulsion foam forming process

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FI20011291A (fi) * 2001-06-18 2002-12-19 Metso Paper Inc Menetelmä ja paperikone päällystetyn paperin valmistamiseksi
DE10228113A1 (de) * 2002-06-24 2004-01-15 Voith Paper Patent Gmbh Verfahren zum Umrüsten einer Maschine zur Herstellung und Behandlung einer Materialbahn vorzugsweise aus Papier oder Karton und entsprechend umgerüstete Maschine mit einer Kontaktlos-Auftragsvorrichtung anstelle einer Leimpresse
FI116079B (fi) * 2002-11-27 2005-09-15 Metso Paper Inc Kartonkituote ja menetelmä sen valmistamiseksi
FI20025051A0 (fi) * 2002-11-27 2002-11-27 Metso Paper Inc LWC-paperi ja menetelmä sen valmistamiseksi
DE10333524A1 (de) * 2003-07-23 2005-02-17 Voith Paper Patent Gmbh Verfahren und Vorrichtung zur Herstellung einer Faserstoffbahn, insbesondere SC-A- oder SC-B-Papierbahn
DE102008000134A1 (de) * 2008-01-23 2009-07-30 Voith Patent Gmbh Verfahren und Vorrichtung zur Herstellung von gestrichenen Papieren
DE102021121870A1 (de) 2021-08-24 2023-03-02 Voith Patent Gmbh Maschine zur herstellung oder behandlung einer faserstoffbahn

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AU2002214076A1 (en) 2002-05-21
EP1337705B1 (fr) 2006-12-27
WO2002038858A3 (fr) 2002-09-06
DE60125582T2 (de) 2007-10-18
DE60125582D1 (de) 2007-02-08
WO2002038858A8 (fr) 2004-04-22
ATE349566T1 (de) 2007-01-15
EP1337705A2 (fr) 2003-08-27

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