EP2129829B1 - Belt for paper machine - Google Patents

Belt for paper machine Download PDF

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Publication number
EP2129829B1
EP2129829B1 EP08709011A EP08709011A EP2129829B1 EP 2129829 B1 EP2129829 B1 EP 2129829B1 EP 08709011 A EP08709011 A EP 08709011A EP 08709011 A EP08709011 A EP 08709011A EP 2129829 B1 EP2129829 B1 EP 2129829B1
Authority
EP
European Patent Office
Prior art keywords
endless belt
longitudinal
threads
belt
belt according
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.)
Not-in-force
Application number
EP08709011A
Other languages
German (de)
French (fr)
Other versions
EP2129829A1 (en
Inventor
Martin Ringer
Ademar Lippi Alves Fernandes
Andrew Cartwright
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.)
Voith Patent GmbH
Original Assignee
Voith Patent 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 Voith Patent GmbH filed Critical Voith Patent GmbH
Priority to PL08709011T priority Critical patent/PL2129829T3/en
Publication of EP2129829A1 publication Critical patent/EP2129829A1/en
Application granted granted Critical
Publication of EP2129829B1 publication Critical patent/EP2129829B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • 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
    • D21F1/0054—Seams thereof
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/0209—Wet presses with extended press nip
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/0272—Wet presses in combination with suction or blowing devices

Definitions

  • the invention relates to an endless belt for a machine for producing a fibrous web, which is designed for an application in which acts on the band acting in the longitudinal direction of the strip tensile stress of at least 30kN / m.
  • the invention further relates to a press machine of a machine for producing a fibrous web, in which such an endless belt ats press belt is used.
  • a belt for a paper machine which has an elastic connecting filament, which is connectable to a first and a second Endabsthnitt the belt, so that an endless belt is formed.
  • a press felt emerges, which has first and second end portions that overlap each other and are permanently connected to each other.
  • the publication WO 2005/075732 A2 shows a permeable flat-woven press belt, which is designed to absorb tensile stresses up to 30kN / m.
  • an extended press nip is formed by passing a tensioned press belt over a mating surface.
  • the counter surface is usually formed by a portion of the lateral surface of a roller.
  • the new press device is characterized in particular by the fact that the fibrous web is dewatered in the direction of the counter surface by means of the pressing force of the band and the action of at least one fluid flowing in the direction from the press belt to the counter surface.
  • higher dry contents of the paper produced in this way, in particular tissue paper are achieved by the extended press nip.
  • permeable woven structures are used as press belts, which are woven flat and then subsequently made endless on the machine by means of a connecting seam connection. Since these press belts are subject to tensile stresses of at least 30 kN / M but often between 40 and 70 kN / m, this type of seam proves to be a weak point, in particular with regard to their durability.
  • the invention is achieved by an endless belt for a machine for producing a fibrous web, wherein the belt is designed for an application in which a tensile stress of at least 30 kN / m acts on it.
  • the tape according to the invention comprises a fabric having a flat woven weave structure and a joining region in which the flat woven weave structure comprises longitudinal yarns extending in the MD direction and first cross yarns interwoven in the CMD direction, in which the flat woven weave structure extends longitudinally is delimited by a first longitudinal end and a second longitudinal end, in which each longitudinal thread viewed in its longitudinal extent has a first thread end portion, which protrudes in the MD direction over the first longitudinal end of the weave structure, and a second thread end portion, in the MD direction protruding beyond the second longitudinal end of the weave structure, wherein the two longitudinal ends of the flat weave weave are joined together to make the tape endless by the joining portion formed by interweaving the first and second end portions of the longitudinal threads with second transverse threads is and in this case forms a
  • the tape according to the invention comprises a fabric. Through interwoven Longitudinal and transverse threads, a structure is provided, which is able to absorb high tensile stresses.
  • the connecting region is formed in the band according to the invention so that the yarn end portions of the longitudinal threads in the MD direction in the connection area extend and are woven to form the connecting portion with other transverse threads, the longitudinal thread sections facing each other when endless, pairs of CMD Consider the direction immediately adjacent juxtaposed first and second L Lucassfadenendab mustarden, each viewed in the MD direction, overlap in a common section of at least 15 consecutive transverse threads and thereby weave the same Webpfad.
  • the tape of the present invention is typically made by first making the flat weave weave structure and subsequently assembling it through the woven joint area to form an endless belt. Then the endless belt is fed into the machine.
  • each overlapping area in the MD direction is terminated by the fact that the first and the second thread end portion is guided to an outer side of the fabric.
  • each overlapping area comprises the same number of second transverse threads.
  • the first and the second transverse threads are identical in their shape and shape and the material from which they are made.
  • connection region is reinforced at least in sections additionally with polymer material or adhesive, which was preferably brought to the connection region in the liquid state and an adhesive connection between the first and second Fadenendabroughen in their respective overlap region manufactures.
  • the polymer material or the adhesive may in this case have been applied in particular in such a way that the permeability in this range is not less than in the case of extenders without liquid-applied adhesive or liquid-applied polymer material. This can be done, for example, by the adhesive or the polymer material, which accumulates in the fabric meshes, being blown away by means of compressed air.
  • the two end portions of a pair of yarns in the overlapping region at least partially welded together. This can be done, for example, by ultrasonic welding.
  • the overlapping areas arranged next to one another in the CMD direction are offset relative to one another in the MD direction.
  • the extended connection area provides improved durability of the connection.
  • the offset achieves that the overlap areas are not all arranged along a single CMD-directional line, thereby preventing a potential marking tendency of the tape at that location.
  • the relative offset in the MD direction preferably comprises overlapping regions 20 to 60, preferably 30 to 40 consecutive second transverse threads arranged directly next to one another in the CD direction.
  • a multiplicity of successive overlapping regions each have the same offset relative to one another.
  • a further particularly preferred embodiment of the invention provides that the flat woven weave structure and the connection region have the same weave pattern.
  • the weave pattern of the flat woven weave structure preferably continues through the weave pattern of the joining region without an offset occurring between the two weave patterns. This makes it possible to provide an endless belt which has the same properties over its entire length and over the connection area. This creates an endless belt in which the joint area has the same properties as the flat woven weave structure.
  • the fabric of the tape of the invention may be both single ply, i. with one longitudinal thread and one transverse thread layer as well as two or more layers, i. be formed with two or more longitudinal and / or transverse thread layers.
  • the weave pattern of the press belt is repeated in Repeat units.
  • a variety of types of bonding come into consideration.
  • a repeat unit can form either a plain weave or a 5-strand satin weave.
  • the arrangement of the overlapping areas is repeated in rapports, in which case it makes sense if the repeat of the arrangement of the overlapping areas comprises more longitudinal threads and / or more transverse threads than the repeat of the flat woven structure.
  • connection area defined by the two overlapping areas, which are viewed in the MD direction, are the most widely spaced, between 5 cm and 100 cm, preferably between 10cm and 70cm, more preferably between 40cm and 60cm.
  • the entire connecting region in the MD direction can extend over a length in the range from 5 to 100 cm, preferably between 10 cm and 70 cm, particularly preferably between 40 cm and 60 cm.
  • a concrete embodiment of the invention provides that the endless belt is formed only by the tissue.
  • the tape according to the invention is used as a press belt in a belt press device, dewatering of the fibrous web takes place in that the fibrous web is simultaneously dewatered in the direction of the counter surface by means of the pressing force of the belt and the action of at least one fluid flowing in the direction from the press belt to the counter surface.
  • the tape is permeable and preferably has a permeability between 47.2 and 566, preferably between 141.5 and 377.3 dm 3 / s (100cfm and 1200cfm, preferably between 300cfm and 800cfm).
  • the band is designed for an application in which a tensile stress of between 40 and 70 kN / m acts on the band.
  • the longitudinal threads are warp threads and the transverse threads are weft threads.
  • the invention relates to an improved press apparatus for a machine for producing a fibrous web, in which an endless belt as described above is used as a press belt, wherein the band is under a tensile stress of at least 30kN / m and guided over an opposing surface to provide an extended press nip is, which is preferably formed by a portion of the lateral surface of a roller, in particular suction roll, wherein the fibrous web between the band and the counter surface is guided and the belt exerts a pressing force on the fibrous web due to its tensile stress.
  • the upper permeable covering is preferably a three-dimensionally structured sieve, such as, for example, a TAD sieve.
  • the lower permeable fabric is preferably a press felt.
  • a press machine equipped with the belt of the present invention operates significantly more reliably than a conventional press machine equipped with a conventional press belt due to the more stable formation of the joint portion.
  • the tape according to the invention has an open area of at least 25% and a contact area of at least 10% of its total has upper clothing facing surface.
  • FIG. 1 shows a machine 1 for producing a fibrous web 2, which is equipped with a press device 3 with a band 4 according to the invention as a press belt.
  • the fibrous web 2 which in the present case is a tissue web, is formed in a forming section 5 of the machine 1 by moving a liquid pulp suspension into the inlet gap 6 between a conventional web permeable and flat Formiersieb 7 and a permeable and three-dimensionally structured sieve 8 is introduced.
  • the structured sieve 8 in this case has a surface contacting the fibrous web, which has larger elevations and depressions compared to the surface of the flat sieve 7 contacting the fibrous web.
  • the forming fabric 7 is lifted from the fibrous web 2 and fed the fibrous web 2 on the structured sieve 8 of the press device 3.
  • the endless belt 4 according to the invention is used as a press belt.
  • the press belt 4 is in the press device 3 under a tensile stress of at least 30kN / m.
  • the press belt 4 is guided over an opposing surface, which in the present case is formed by a section of the lateral surface of a suction roll 10 in the region of a suction zone Z.
  • the tissue web 2 is guided in a sandwich between the permeable, three-dimensionally structured sieve 8 and a permeable, smooth press belt-shaped belt 11.
  • the press belt 4 contacts the structured wire 8 and the press felt 11 is supported on the outer surface of the suction roll 10. Due to its tensile stress, the press belt 4 exerts a pressing force on the sandwich consisting of structured wire 8, fibrous web 2 and press felt 11.
  • a blowing device 16 is arranged which causes a fluid stream of hot air and / or steam to flow through the press belt 4, the structured wire 8, the fibrous web 2 and the press belt 11 to the suction zone Z. Accordingly, in the press apparatus 3, the fibrous web 2 is dewatered by the simultaneous action of the pressing force of the band 4 on the fibrous web 2 and the fluid flowing in the direction from the press belt 4 to the counter surface through the fibrous web 2.
  • the press felt 11 After passing through the press device 3, the press felt 11 is lifted off the fibrous web 2 and fed onto the structured wire to a press nip 14 formed between a press roll 12 and a Yankee drying cylinder 13 for further dewatering.
  • the fibrous web 2 After passing through the press nip 14, the fibrous web 2 is lifted off the structured sieve 8 and guided on the lateral surface of the Yankee drying cylinder 13 to be subsequently lifted therefrom by means of a scraper device 15 thereof.
  • FIG. 2 shows the Kettfadenverrough a repeat unit of the tape 4 of the invention, which in the machine of FIG. 1 is used.
  • the band 4 has the illustrated warp path both in the area of the flat-woven structure and in the connection area, wherein the weave pattern of the fabric continues from the flat-woven structure into the connection area without interruption or offset.
  • each warp thread K1 to K5 continuously crosses four weft threads on the underside US of the fabric and a weft thread runs on the upper side OS of the fabric.
  • the warp thread K1 on the underside US continuously crosses the four successive weft threads S1 to S4 before it continuously crosses the weft thread S5 on the upper side OS.
  • weft threads are indicated only by their position and not by whether they are first or second weft threads (NOTE: the number before the designation indicates whether it is a first or a second weft thread; the designation the position of the weft thread).
  • Table 1 shows the technical data of the band of the invention FIG. 2 .
  • FIG. 3a shows the course of one of the warp threads K1 to K5 of the tape of the invention FIG. 2 in a portion of the flat woven weave structure and in a portion of the joint region.
  • the weaving path of one of the warp threads K1 to K5 can be seen, like this one in the FIG. 2 weaves over several repeats described manner. Since all the warp threads K1 to K5 have the same weaving paths, which only by a relative offset in the MD direction to each other according to the in the FIG. 2
  • the following example can be applied to all weaving paths of the warp threads K1 to K5 of a warp repeat of the fabric.
  • the pairs of parallel lines in the FIG. 3a indicate an interruption in the representation of the actually continuing web path of the warp Kx.
  • the endless belt 4 is designed for an application in which a tensile stress of at least 30 kN / m acts on the belt.
  • the endless belt 4 is formed only by a single-ply fabric 20.
  • the fabric 20 is formed by a flat woven weave structure 21 and a joining region 22.
  • the flat woven weave structure 21 is formed by interweaving the warp yarns K1 to K5 extending in the MD direction and the first transverse yarns 1S extending therewith in the CMD direction, wherein the first transverse yarns are 1S weft yarns.
  • the flat-woven structure 21 is limited in its longitudinal extent by a first longitudinal side end and a second longitudinal side end.
  • the two longitudinal ends of the flat woven weave structure are in the representation of FIG. 3a for reasons of space not, but in the presentation of FIG. 4 shown.
  • each longitudinal thread Kx viewed in its longitudinal extent has a first thread end section, which protrudes beyond the first longitudinal end of the woven structure in the MD direction, and a second thread end section, which projects beyond the second longitudinal end of the woven structure in the MD direction.
  • the first yarn end portion of one of the warp yarns K1 to K5 are provided with the reference character Kx.1 and the second yarn end portion of the same warp yarn Kx is provided with the reference symbol Kx.2.
  • the two longitudinal ends of the flat-woven structure for endless making the band through the connecting portion 22 are interconnected by the first and the second end portions of the longitudinal yarns K1 to K5 are woven with second formed as weft yarns cross-threads 2S so that the weave of the flat woven structure 21 continues without interruption by the weave pattern of the connection region 22.
  • the flat-weaved weave structure 21 and the bonding portion 22 have the same weave pattern.
  • the yarn end portions When weaving the yarn end portions of the warp yarns K1 to K5, the yarn end portions form a plurality of pairs of first and second yarn end portions in which the two yarn end portions are arranged side by side in the CMD direction and where the two yarn end portions are in the MD direction contemplated forming a common overlap region by interweaving the first end portion of the pair with the same at least 15 consecutive second transverse threads 2S with which the second end portion of the pair is interwoven and in that the two end portions of the pair in the overlap region follow the same weaving path.
  • the two thread end sections Kx.1 and Kx.2 of the same warp thread Kx form an overlapping area Üy by interweaving the first end section of the pair Kx.1 with the same eighteen consecutive second transverse threads 2S with which the first end section second end section Kx.2 of the pair is interwoven and in that the two end sections Kx.1 and Kx.2 of the pair in the overlapping area Üy follow the same weaving path.
  • each overlapping area Üy viewed in the MD direction is completed by the first thread end section Kx.1 and the second thread end section kx.2 being guided to an outer side of the fabric 20.
  • the two ends of the overlap area Üy are in the FIG. 3a with 1 Ey and 2Ey.
  • each overlap area Ü1 to Ü5 has the same number of second transverse threads.
  • the FIG. 3b shows the five in the CMD direction consecutive overlap areas Ü1 to Ü5.
  • the offset of mutually adjacent overlapping areas here is in each case 40 second transverse threads 2S, the offset always being determined by the smallest distance of the one end of an overlapping area from the end of the following overlapping area which is closest to the first-mentioned end.
  • the offset between the two successive overlapping areas Ü1 and Ü2 is determined by the distance between the end 2E1 of the overlapping area Ü1 and the end 1E2 of the overlapping area Ü2.
  • the offset between the two successive overlapping areas Ü2 and Ü3 is set by the distance between the end 2E2 of the overlapping area Ü2 and the end 1E3 of the overlapping area Ü3.
  • the principle continues with the other overlapping areas.
  • FIG. 4 shows in plan view sections, the connecting portion 22 and the flat-woven structure 21 of the band 4 of the invention Figures 2 and 3 ,
  • FIG. 4 shows in particular in the connection region 22, the relative arrangement of the overlapping areas to each other. Furthermore, the shows FIG. 4 a section of the flat-woven structure 21 and the two flat-woven structure limiting ends 23 and 24, which are connected to each other in the endless belt 4 through the connecting portion 22.
  • the FIG. 4 shows the band 4 both only in a partial length and in only a partial width.
  • connection region shows three in the CMD direction side by side arranged repeats R1, R2, R3 of the arrangement of overlapping areas. Viewed in the MD direction, the connection area extends over the length of a repeat.
  • Each repeat R1, R2 and R3 of overlap areas is formed by the overlap areas Ü1 to Ü35. Therefore, the repeat R1, R2 and R3 of the arrangement of the overlapping areas is larger than the repeat forming the weave pattern formed by the warp yarns K1 to K5 and the weft yarns S1 to S5 of the flat-weaved woven structure 21 and the joining area 22, respectively.
  • Overlapping areas Ü1 to Ü35 which are arranged next to one another in the CMD direction, are offset relative to one another in the MD direction.
  • the two successive overlapping areas Ü1 and Ü2 are staggered by 40 second transverse threads 2S, the offset always being determined by the smallest distance of one end of an overlapping area to the end of the following overlapping area which is closest to the first-mentioned end.
  • all of the successive overlapping areas Ü1 to Ü9 each have the same offset from each other.
  • All overlapping areas lie on a family of mutually parallel straight lines, whereby successive overlapping areas, each arranged on a straight line, always have the same offset relative to one another and wherein all the straight lines of the crowd are equally spaced from one another.
  • connection area defined by the two overlapping areas Ü34 and Ü35, which are viewed in the MD direction, are the most widely spaced, 60 cm.
  • the tape is permeable and in the present case has a permeability of 353.7 dm 3 / s (750 cfm).
  • FIG. 5 shows a further embodiment of a tape according to the invention 4.
  • the present tape 4 viewed in the MD-direction in the connection region 22, has a section A in which all overlapping regions Ua to Üe extend.

Abstract

The invention is an endless belt for a machine for the production of a fibrous material web, the belt being formed by a flat woven structure and a connecting region. The flat woven structure has longitudinal threads extending in the MD direction and transverse threads extending in the CMD direction. Every longitudinal thread, has a first thread end section, which protrudes beyond the first end of the woven structure, and a second thread end section, which protrudes beyond the second end of the woven structure. The two ends of the flat woven structure are connected to each other by the connecting region, which is formed by weaving the first and second end sections of the longitudinal threads to the second transverse threads, thereby forming a plurality of pairs of a first and a second thread end section, wherein the two thread end sections are disposed directly adjacent to each other and the two thread end sections form a common overlapping region in that the first and second end sections of the pair are woven with the at least consecutive second transverse threads, and the two end sections of the pair follow the same weaving path in the overlapping region.

Description

Die Erfindung betrifft ein endloses Band für eine Maschine zur Herstellung einer Faserstoffbahn, welches für eine Anwendung ausgelegt ist, bei der auf das Band eine in Längserstreckung des Bandes wirkende Zugspannung von zumindest 30kN/m einwirkt.The invention relates to an endless belt for a machine for producing a fibrous web, which is designed for an application in which acts on the band acting in the longitudinal direction of the strip tensile stress of at least 30kN / m.

Die Erfindung betrifft ferner eine Pressenvörnchtung einer Maschine zur Herstellung einer Faserstoffbahn, bei der ein solches endloses Band ats Pressband Verwendung findet.The invention further relates to a press machine of a machine for producing a fibrous web, in which such an endless belt ats press belt is used.

Aus dem deutschen Patent DE 901 256 ist bereits ein Verfahren zur Herstellung einer Webenaht zum Endlosmachen von Metalltüchern, insbesondere für Papiermaschinen bekannt, bei welchem durch Verweben der Enden der Kettendrähte der zu verbindenden Gewebekanten mit einer gemeinsamen, quer dazu liegenden Hilfskette ein Endlostuch hergestellt wird. Die mit de Hilfskette zu verwebenden Enden der Kettendrähte des Metalltuches werden dabei vor dem Weben gekröpftFrom the German patent DE 901 256 A method for producing a weaving seam for continuous metal cloths, in particular for paper machines, is already known, in which an endless cloth is produced by interweaving the ends of the warp wires of the fabric edges to be joined with a common transverse chain. The ends of the warp wires of the metal cloth which are to be interwoven with the auxiliary chain are thereby bent before weaving

Weiterhin ist aus der Offenlegunssschrift WO 03/031093 A1 ein Gurt für eine Papiermaschine bekannt, welcher ein elastisches Verbindungsfilament aufweist, Welches mit einem ersten und einem zweiten Endabsthnitt des Gurtes verbindbar ist, so dass ein Endlosband entsteht.Furthermore, from the Offenlegunssschrift WO 03/031093 A1 a belt for a paper machine is known, which has an elastic connecting filament, which is connectable to a first and a second Endabsthnitt the belt, so that an endless belt is formed.

Aus der Offenlegungsschrift WO 2004/055265 A1 geht ein Pressfilz hervor, welcher erste und zweite Endbereiche äufweisen, die einander überlappen und unlösbar miteinander verbunden sind.From the publication WO 2004/055265 A1 For example, a press felt emerges, which has first and second end portions that overlap each other and are permanently connected to each other.

Die Offenlegungsschrift WO 2005/075732 A2 zeigt einen permeablen flachgewebten Pressgurt, der konstruktionsbedingt Zugspannungen bis 30kN/m aufhehmen können soll.The publication WO 2005/075732 A2 shows a permeable flat-woven press belt, which is designed to absorb tensile stresses up to 30kN / m.

In der näheren Vergangenheit wurde eine neue Pressenvorrichtung vorgeschlagen, bei der ein verlängerter Pressnip gebildet wird, indem ein unter Spannung stehendes Pressband über eine Gegenfläche geführt wird. Hierbei wird die Gegenfläche in der Regel durch einen Abschnitt der Mantelfläche einer Walze gebildet. Die neue Pressen-vorrichtung zeichnet sich insbesondere dadurch aus, dass die Faserstoffbahn mittels der Presskraft des Bandes und der Einwirkung zumindest eines in Richtung vom Pressband zur Gegenfläche strömenden Fluids in Richtung der Gegenfläche entwässert wird. Durch den verlängerten Pressnip werden insbesondere höhere Trockengehalte des so gefertigten Papiers, insbesondere Tissuepapiers erzielt.In the recent past, a new press apparatus has been proposed in which an extended press nip is formed by passing a tensioned press belt over a mating surface. Here, the counter surface is usually formed by a portion of the lateral surface of a roller. The new press device is characterized in particular by the fact that the fibrous web is dewatered in the direction of the counter surface by means of the pressing force of the band and the action of at least one fluid flowing in the direction from the press belt to the counter surface. In particular, higher dry contents of the paper produced in this way, in particular tissue paper, are achieved by the extended press nip.

Als Pressbänder werden insbesondere permeable gewobene Strukturen verwendet, die flach gewoben werden und dann anschließend auf der Maschine durch eine Stecknahtverbindung endlos gemacht werden. Da diese Pressbänder Zugspannungen von mindestens 30kN/M oftmals aber zwischen 40 und 70 kN/m ausgesetzt sind, erweist sich diese Art von Nahtstelle als Schwachpunkt, insbesondere bezüglich deren Dauerbeständigkeit.In particular, permeable woven structures are used as press belts, which are woven flat and then subsequently made endless on the machine by means of a connecting seam connection. Since these press belts are subject to tensile stresses of at least 30 kN / M but often between 40 and 70 kN / m, this type of seam proves to be a weak point, in particular with regard to their durability.

Es ist Aufgabe der vorliegenden Erfindung ein flach gewobenes aber endlos gemachtes Band das für den Einsatz unter Zugspannung von zumindest 30kN/m ausgelegt ist, mit einer verbesserten Verbindung vorzuschlagen.It is an object of the present invention, a flat-woven but endless made tape which is designed for use under tension of at least 30kN / m, to propose with an improved connection.

Die Erfindung wird gelöst durch ein endloses Band für eine Maschine zur Herstellung einer Faserstoffbahn, wobei das Band für eine Anwendung ausgelegt ist, bei der eine Zugspannung von zumindest 30kN/m auf dieses einwirkt. Das erfindungsgemäße Band umfasst ein Gewebe mit einer flach gewobenen Webstruktur und mit einem Verbindungsbereich bei dem die flach gewobene Webstruktur sich in MD-Richtung erstreckende Längsfäden und damit verwobene sich in CMD-Richtung erstreckende erste Querfäden umfasst, bei dem die flach gewobene Webstruktur in ihrer Längsausdehnung durch ein erstes längsseitiges Ende und ein zweites längsseitiges Ende begrenzt ist, bei dem jeder Längsfaden in seiner Längserstreckung betrachtet einen ersten Fadenendabschnitt, der in MD-Richtung über das erste längsseitige Ende der Webstruktur hinausragt, und einen zweiten Fadenendabschnitt hat, der in MD-Richtung über das zweite längsseitige Ende der Webstruktur hinausragt, bei dem die beiden längsseitigen Enden der flach gewobenen Webstruktur zum endlos machen des Bandes durch den Verbindungsbereich miteinander verbunden sind, der durch Verweben der ersten und zweiten Endabschnitte der Längsfäden mit zweiten Querfäden gebildet ist und hierbei eine Vielzahl von Paaren aus jeweils einem ersten und einem zweiten Fadenendabschnitt bildet, bei denen die beiden Fadenendabschnitte in CMD-Richtung betrachtet unmittelbar nebeneinander angeordnet sind und bei denen die beiden Fadenendabschnitte in MD-Richtung betrachtet einen gemeinsamen Überlappungsbereich bilden, indem der erste Endabschnitt des Paares mit den selben zumindest 15 aufeinander folgenden zweiten Querfäden verwoben ist, mit denen auch der zweite Endabschnitt des Paares verwoben ist und indem die beiden Endabschnitte des Paares im Überlappungsbereich dem gleichen Webpfad folgen.The invention is achieved by an endless belt for a machine for producing a fibrous web, wherein the belt is designed for an application in which a tensile stress of at least 30 kN / m acts on it. The tape according to the invention comprises a fabric having a flat woven weave structure and a joining region in which the flat woven weave structure comprises longitudinal yarns extending in the MD direction and first cross yarns interwoven in the CMD direction, in which the flat woven weave structure extends longitudinally is delimited by a first longitudinal end and a second longitudinal end, in which each longitudinal thread viewed in its longitudinal extent has a first thread end portion, which protrudes in the MD direction over the first longitudinal end of the weave structure, and a second thread end portion, in the MD direction protruding beyond the second longitudinal end of the weave structure, wherein the two longitudinal ends of the flat weave weave are joined together to make the tape endless by the joining portion formed by interweaving the first and second end portions of the longitudinal threads with second transverse threads is and in this case forms a plurality of pairs of a respective first and a second thread end portion, in which the two Fadenendabschnitte considered in CMD direction are arranged directly adjacent to each other and in which the two Fadenendabschnitte MD viewed form a common overlap region by the first End portion of the pair is woven with the same at least 15 consecutive second transverse threads with which the second end portion of the pair is woven and in that the two end portions of the pair in the overlap region follow the same weaving path.

Das erfindungsgemäße Band umfasst ein Gewebe. Durch miteinander verwobene Längs- und Querfäden wird eine Struktur bereitgestellt, die in der Lage ist, hohe Zugspannungen aufzunehmen. Der Verbindungsbereich ist beim erfindungsgemäßen Band so ausgebildet, dass sich die Fadenendabschnitte der Längsfäden in MD-Richtung in den Verbindungsbereich erstrecken und hierbei zur Ausbildung des Verbindungsbereichs mit weiteren Querfäden verwoben sind, wobei die Längsfadenabschnitte, die beim Endlosmachen aufeinander zu weisen, Paare von in CMD-Richtung betrachtet unmittelbar nebeneinander angeordneten ersten und zweiten Längsfadenendabschnitten bilden, die sich jeweils in MD-Richtung betrachtet, in einem gemeinsamen Abschnitt von zumindest 15 aufeinander folgenden Querfäden überlappen und hierbei den gleichen Webpfad weben.The tape according to the invention comprises a fabric. Through interwoven Longitudinal and transverse threads, a structure is provided, which is able to absorb high tensile stresses. The connecting region is formed in the band according to the invention so that the yarn end portions of the longitudinal threads in the MD direction in the connection area extend and are woven to form the connecting portion with other transverse threads, the longitudinal thread sections facing each other when endless, pairs of CMD Consider the direction immediately adjacent juxtaposed first and second Längsfadenendabschnitten, each viewed in the MD direction, overlap in a common section of at least 15 consecutive transverse threads and thereby weave the same Webpfad.

Durch den großen Überlappungsbereich den die beiden in CMD-Richtung unmittelbar zueinander benachbarten Längsfadenendabschnitte in MD-Richtung miteinander haben, wird eine sichere Verbindung zur Verfügung gestellt. Da die beiden Längsfadenendabschnitte eines Paares im gemeinsamen Überlappungsbereich mit den aufeinander folgenden Querfäden den gleichen Webpfad weben, besteht die Möglichkeit im Verbindungsbereich das Webmuster der flach gewobenen Webstruktur fortzusetzen, wodurch es möglich ist einen Verbindungsbereich zu schaffen, der die gleichen Eigenschaften (z.B. Permeabilität, Offene und geschlossne Struktur) wie die flach gewobene Webstruktur hat.Due to the large overlap area the two CMD direction directly adjacent to each other Längsfadenendabschnitte MD direction have together, a secure connection is provided. Since the two longitudinal thread end sections of a pair weave the same weaving path in the common overlapping region with the successive transverse threads, it is possible to continue the weaving pattern of the flat woven weave structure in the joining region, whereby it is possible to provide a joining region having the same properties (eg permeability, open weave, etc.) and closed structure) like the flat woven weave structure.

Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung sind in den Unteransprüchen angegeben.Advantageous embodiments and further developments of the invention are specified in the subclaims.

Das erfindungsgemäße Band wird in der Regel hergestellt, indem zuerst die flach gewobene Webstruktur hergestellt wird und diese nachfolgend durch den gewobenen Verbindungsbereich zu einem endlosen Band zusammengefügt wird. Anschließend wird das endlose Band in die Maschine eingezogen.The tape of the present invention is typically made by first making the flat weave weave structure and subsequently assembling it through the woven joint area to form an endless belt. Then the endless belt is fed into the machine.

Vorteilhafterweise ist jeder Überlappungsbereich in MD-Richtung betrachtet dadurch beendet, indem der erste und der zweite Fadenendabschnitt zu einer Außenseite des Gewebes geführt ist.Advantageously, each overlapping area in the MD direction is terminated by the fact that the first and the second thread end portion is guided to an outer side of the fabric.

Versuche der Anmelderin haben gezeigt, dass es abhängig von der bei der spezifischen Anwendung auftretenden Zugspannung sinnvoll sein kann, wenn die Überlappungsbereiche bis zu 60 aufeinander folgende zweiten Querfäden umfassen. Für die vorliegend angegebene Anwendung in einer Bandpresse bei Zugspannungen von 30kN/m und mehr haben Versuche gezeigt, dass es ausreichend ist, wenn die Überlappungsbereiche 18 bis 25 aufeinander folgende zweite Querfäden umfassen.Applicant's experiments have shown that, depending on the tensile stress involved in the specific application, it may be expedient if the overlapping regions comprise up to 60 consecutive second transverse threads. For the present application in a belt press at tensile stresses of 30 kN / m and more, tests have shown that it is sufficient if the overlapping regions comprise 18 to 25 consecutive second transverse threads.

Vorzugsweise umfasst jeder Überlappungsbereich die gleiche Anzahl von zweiten Querfäden.Preferably, each overlapping area comprises the same number of second transverse threads.

Vorzugsweise sind die ersten und die zweiten Querfäden bezüglich ihrer Form und Gestalt und dem Material aus dem diese gefertigt sind identisch.Preferably, the first and the second transverse threads are identical in their shape and shape and the material from which they are made.

Um die Haltbarkeit der Naht weiter zu verbessern kann es sinnvoll sein, wenn der Verbindungsbereich zumindest abschnittweise zusätzlich mit Polymermaterial oder Klebstoff verstärkt ist, welches vorzugsweise in flüssigem Zustand auf den Verbindungsbereich gebracht wurde und eine adhäsive Verbindung zwischen den ersten und zweiten Fadenendabschnitten in deren jeweiligen Überlappungsbereich herstellt. Das Polymermaterial oder der Klebstoff kann hierbei insbesondere so aufgebracht worden sein, dass die Permeabilität in diesem Bereich nicht kleiner ist als in Bereichern ohne flüssig aufgebrachten Klebstoff oder flüssig aufgebrachtes Polymer-material. Dies kann bspw. dadurch geschehen, dass der Klebstoff oder das Polymermaterial, welches sich in den Gewebemaschen anlagert, mittels Druckluft weggeblasen wird.In order to further improve the durability of the seam, it may be useful if the connection region is reinforced at least in sections additionally with polymer material or adhesive, which was preferably brought to the connection region in the liquid state and an adhesive connection between the first and second Fadenendabschnitten in their respective overlap region manufactures. The polymer material or the adhesive may in this case have been applied in particular in such a way that the permeability in this range is not less than in the case of extenders without liquid-applied adhesive or liquid-applied polymer material. This can be done, for example, by the adhesive or the polymer material, which accumulates in the fabric meshes, being blown away by means of compressed air.

Zusätzlich oder alternativ dazu können die beiden Fadenendabschnitte eines Paares im Überlappungsbereich zumindest abschnittweise miteinander verschweißt sein. Dies kann beispielsweise durch Ultraschallschweißen bewerkstelligt werden.Additionally or alternatively, the two end portions of a pair of yarns in the overlapping region at least partially welded together. This can be done, for example, by ultrasonic welding.

Um den gesamten Verbindungsbereich in MD-Richtung länger machen zu können, ohne hierbei die einzelnen Überlappungsbereiche zu vergrößern, sieht eine bevorzugte Ausgestaltung der Erfindung vor, dass die in CMD-Richtung nebeneinander angeordneten Überlappungsbereiche in MD-Richtung betrachtet relativ zueinander versetzt sind. Durch den verlängerten Verbindungsbereich wird eine verbesserte Haltbarkeit der Verbindung erreicht. Weiter wird durch den Versatz erreicht, dass die Überlappungsbereiche nicht alle entlang einer einzigen sich in CMD-Richtung erstreckenden Linien angeordnet sind, wodurch eine potentielle Markierungsneigung des Bandes an dieser Stelle unterbunden wird.To be able to make the entire connection area in the MD direction longer, without enlarging the individual overlapping areas, one sees According to a preferred embodiment of the invention, the overlapping areas arranged next to one another in the CMD direction are offset relative to one another in the MD direction. The extended connection area provides improved durability of the connection. Further, the offset achieves that the overlap areas are not all arranged along a single CMD-directional line, thereby preventing a potential marking tendency of the tape at that location.

Vorzugsweise umfasst der relative Versatz in MD-Richtung von in CD-Richtung unmittelbar nebeneinander angeordneten Überlappungsbereichen 20 bis 60, vorzugsweise 30 bis 40 aufeinander folgende zweite Querfäden.The relative offset in the MD direction preferably comprises overlapping regions 20 to 60, preferably 30 to 40 consecutive second transverse threads arranged directly next to one another in the CD direction.

Um das erfindungsgemäße endlose Band einfach fertigen zu können ist vorzugsweise vorgesehen, dass eine Vielzahl aufeinander folgender Überlappungsbereiche, jeweils den gleichen Versatz zueinander haben.In order to be able to easily manufacture the endless belt according to the invention, it is preferably provided that a multiplicity of successive overlapping regions each have the same offset relative to one another.

Eine weitere besonders bevorzugte Ausgestaltung der Erfindung sieht vor, dass die flach gewobene Webstruktur und der Verbindungsbereich das gleiche Webmuster haben. Vorzugsweise setzt sich hierbei das Webmuster der flach gewobenen Webstruktur durch das Webmuster des Verbindungsbereichs fort, ohne dass ein Versatz zwischen den beiden Webmustern entsteht. Hierdurch ist es möglich ein endloses Band bereitzustellen, welches über seine gesamte Länge und über den Verbindungsbereich hinweg dieselben Eigenschaften hat. Hierdurch wird ein endloses Band geschaffen, bei dem der Verbindungsbereich die gleichen Eigenschaften wie die flach gewobene Webstruktur hat.A further particularly preferred embodiment of the invention provides that the flat woven weave structure and the connection region have the same weave pattern. In this case, the weave pattern of the flat woven weave structure preferably continues through the weave pattern of the joining region without an offset occurring between the two weave patterns. This makes it possible to provide an endless belt which has the same properties over its entire length and over the connection area. This creates an endless belt in which the joint area has the same properties as the flat woven weave structure.

Das Gewebe des erfindungsgemäßen Bandes kann sowohl einlagig, d.h. mit jeweils einer Längsfaden- und Querfadenlage als auch zwei oder mehrlagig, d.h. mit zwei oder mehr Längs- und / oder Querfadenlagen ausgebildet sein.The fabric of the tape of the invention may be both single ply, i. with one longitudinal thread and one transverse thread layer as well as two or more layers, i. be formed with two or more longitudinal and / or transverse thread layers.

Wie bei allen Geweben wiederholt sich das Webmuster des Pressbandes in Rapporteinheiten. Für die Anwendung des erfindungsgemäßen Bandes als Pressband kommen eine Vielzahl von Bindungsarten in Betracht. Beispielsweise kann eine Rapporteinheit entweder eine Leinwandbindung oder eine 5-schäftige Atlasbindung bilden.As with all fabrics, the weave pattern of the press belt is repeated in Repeat units. For the application of the tape according to the invention as a press belt, a variety of types of bonding come into consideration. For example, a repeat unit can form either a plain weave or a 5-strand satin weave.

Ferner wiederholt sich die Anordnung der Überlappungsbereiche in Rapporten, hierbei ist es sinnvoll, wenn der Rapport der Anordnung der Überlappungsbereiche mehr Längsfäden und / oder mehr Querfäden umfasst als der Rapport der flach gewobenen Webstruktur.Furthermore, the arrangement of the overlapping areas is repeated in rapports, in which case it makes sense if the repeat of the arrangement of the overlapping areas comprises more longitudinal threads and / or more transverse threads than the repeat of the flat woven structure.

Um die Verbindung der Endabschnitte der flach gewebten Webstruktur weiter zu verbessern, sieht eine Weiterbildung der Erfindung vor, dass die Längserstreckung des Verbindungsbereichs, definiert durch die beiden Überlappungsbereiche, die in MD-Richtung betrachtet, voneinander am meisten beabstandet sind, zwischen 5cm und 100cm, bevorzugt zwischen 10cm und 70cm, besonders bevorzugt zwischen 40cm und 60cm, ist. Die bedeutet, dass sich nach dieser Ausgestaltung der gesamte Verbindungsbereich in MD-Richtung über eine Länge im Bereich von 5 bis 100cm, bevorzugt zwischen 10cm und 70cm, besonders bevorzugt zwischen 40cm und 60cm, erstrecken kann.In order to further improve the connection of the end sections of the flat woven structure, a development of the invention provides that the longitudinal extent of the connection area, defined by the two overlapping areas, which are viewed in the MD direction, are the most widely spaced, between 5 cm and 100 cm, preferably between 10cm and 70cm, more preferably between 40cm and 60cm. This means that, according to this embodiment, the entire connecting region in the MD direction can extend over a length in the range from 5 to 100 cm, preferably between 10 cm and 70 cm, particularly preferably between 40 cm and 60 cm.

Eine konkrete Ausgestaltung der Erfindung sieht vor, dass das endlose Band nur durch das Gewebe gebildet ist.A concrete embodiment of the invention provides that the endless belt is formed only by the tissue.

Wird das erfindungsgemäße Band als Pressband in einer Bandpressenvorrichtung eingesetzt, so findet eine Entwässerung der Faserstoffbahn dadurch statt, indem die Faserstoffbahn gleichzeitig mittels der Presskraft des Bandes und der Einwirkung zumindest eines in Richtung vom Pressband zur Gegenfläche strömenden Fluids in Richtung der Gegenfläche entwässert wird. Für die konkrete Anwendung des erfindungsgemäßen Bandes als Pressbandes ist es daher sinnvoll, wenn das Band permeabel ist und bevorzugt eine Permeabilität zwischen 47,2 und 566, bevorzugt zwischen 141,5 und 377,3 dm3/s hat (100cfm und 1200cfm, bevorzugt zwischen 300cfm und 800cfm). Vorzugsweise ist das Band für eine Anwendung ausgelegt, bei der eine Zugspannung zwischen 40 und 70 kN/m auf das Band einwirkt.If the tape according to the invention is used as a press belt in a belt press device, dewatering of the fibrous web takes place in that the fibrous web is simultaneously dewatered in the direction of the counter surface by means of the pressing force of the belt and the action of at least one fluid flowing in the direction from the press belt to the counter surface. For the specific application of the tape according to the invention as a press belt, it is therefore useful if the tape is permeable and preferably has a permeability between 47.2 and 566, preferably between 141.5 and 377.3 dm 3 / s (100cfm and 1200cfm, preferably between 300cfm and 800cfm). Preferably, the band is designed for an application in which a tensile stress of between 40 and 70 kN / m acts on the band.

Des Weiteren kann vorgesehen sein, dass die Längsfäden Kettfäden und die Querfäden Schussfäden sind.Furthermore, it can be provided that the longitudinal threads are warp threads and the transverse threads are weft threads.

Ferner betrifft die Erfindung eine verbesserte Pressenvorrichtung für eine Maschine zur Herstellung einer Faserstoffbahn, bei der ein wie oben beschriebenes endloses Band als Pressband Verwendung findet, wobei das Band unter einer Zugspannung von zumindest 30kN/m steht und zur Bereitstellung eines verlängerten Pressnips über eine Gegenfläche geführt wird, die vorzugsweise durch einen Abschnitt der Mantelfläche einer Walze, insbesondere Saugwalze, gebildet wird, wobei die Faserstoffbahn zwischen dem Band und der Gegenfläche geführt ist und das Band aufgrund seiner Zugspannung eine Presskraft auf die Faserstoffbahn ausübt.Furthermore, the invention relates to an improved press apparatus for a machine for producing a fibrous web, in which an endless belt as described above is used as a press belt, wherein the band is under a tensile stress of at least 30kN / m and guided over an opposing surface to provide an extended press nip is, which is preferably formed by a portion of the lateral surface of a roller, in particular suction roll, wherein the fibrous web between the band and the counter surface is guided and the belt exerts a pressing force on the fibrous web due to its tensile stress.

Vorzugsweise wird die Tissuebahn in einem Sandwich aus oberer permeabler Bespannung und unterer permeabler Bespannung durch die erfindungsgemäße Pressenvorrichtung geführt, so dass im Ergebnis folgender Aufbau vorliegt:

  • 1) Pressband
  • 2) obere permeable Bespannung
  • 3) Tissuebahn
  • 4) untere permeable Bespannung
  • 5) Gegenfläche
Preferably, the tissue web is guided in a sandwich of upper permeable clothing and lower permeable clothing through the press device according to the invention, so that, as a result, the following structure is present:
  • 1) Press belt
  • 2) upper permeable cover
  • 3) tissue web
  • 4) lower permeable clothing
  • 5) counter surface

Vorzugsweise ist hierbei die obere permeable Bespannung ein drei-dimensional strukturiertes Sieb wie bspw. ein TAD-Sieb. Des Weiteren ist die untere permeable Bespannung vorzugsweise ein Pressfilz.In this case, the upper permeable covering is preferably a three-dimensionally structured sieve, such as, for example, a TAD sieve. Furthermore, the lower permeable fabric is preferably a press felt.

Eine mit dem erfindungsgemäßen Band ausgerüstete Pressenvorrichtung arbeitet aufgrund der stabileren Ausbildung des Verbindungsbereichs bedeutend zuverlässiger als eine mit einem konventionellen Pressband ausgerüstete sonst gleiche Pressen-vorrichtung.A press machine equipped with the belt of the present invention operates significantly more reliably than a conventional press machine equipped with a conventional press belt due to the more stable formation of the joint portion.

Um sowohl eine gute Entwässerung der Tissuebahn durch die mechanische Spannung des erfindungsgemäßen Bandes als auch aufgrund eines Fluidstroms durch das Band erzielen zu können ist es sinnvoll, wenn das erfindungsgemäße Band eine offene Fläche von zumindest 25% und eine Kontaktfläche von zumindest 10% seiner gesamten zur oberen Bespannung weisenden Fläche hat.To be able to achieve both a good drainage of the tissue web by the mechanical tension of the tape according to the invention and due to a fluid flow through the belt, it makes sense if the tape according to the invention has an open area of at least 25% and a contact area of at least 10% of its total has upper clothing facing surface.

Die Erfindung wird anhand der nachfolgenden schematischen Zeichnungen weiter erläutert. Es zeigen:

Figur 1
eine Pressenvorrichtung, die mit einem erfindungsgemäßen Band als Pressband ausgerüstet ist,
Figur 2
der Kettfadenverlauf eines erfindungsgemäßen Bandes im Verbindungsbereich und im Bereich der flach gewobenen Webstruktur,
Figur 3
die relative Anordnung der Überlappungsbereiche zueinander in Aufsicht auf das Band der Figur 2,
Figur 4
in Draufsicht abschnittweise den Verbindungsbereich und die flach gewobene Struktur des erfindungsgemäßen Bandes der Figuren 2 und 3,
Figur 5
in Draufsicht abschnittweise den Verbindungsbereich und die flach gewobene Struktur eines weiteren erfindungsgemäßen Bandes.
The invention will be further explained with reference to the following schematic drawings. Show it:
FIG. 1
a press device equipped with a belt according to the invention as a press belt,
FIG. 2
the warp thread course of a band according to the invention in the connection region and in the region of the flat woven weave structure,
FIG. 3
the relative arrangement of the overlapping areas to each other in supervision of the band FIG. 2 .
FIG. 4
In sections, the connecting region and the flat woven structure of the band of the invention Figures 2 and 3 .
FIG. 5
In sections, the joining region and the flat woven structure of another strip according to the invention in plan view.

Die Figur 1 zeigt eine Maschine 1 zur Herstellung einer Faserstoffbahn 2, die mit einer Pressenvorrichtung 3 mit einem erfindungsgemäßen Band 4 als Pressband ausgestattet ist.The FIG. 1 shows a machine 1 for producing a fibrous web 2, which is equipped with a press device 3 with a band 4 according to the invention as a press belt.

Die Faserstoffbahn 2, bei der es sich vorliegend um eine Tissuebahn handelt, wird in einer Formierpartie 5 der Maschine 1 dadurch gebildet, indem eine flüssige Faserstoffsuspension in den Einlaufspalt 6 zwischen einem konventionellem permeablen und flachen Formiersieb 7 und einem permeablen und drei-dimensional strukturierten Sieb 8 eingebracht wird. Das strukturierte Sieb 8 hat hierbei eine die Faserstoffbahn berührende Oberfläche, die im Vergleich zu der die Faserstoffbahn berührenden Oberfläche des flachen Siebs 7 größere Erhebungen und Vertiefungen aufweist.The fibrous web 2, which in the present case is a tissue web, is formed in a forming section 5 of the machine 1 by moving a liquid pulp suspension into the inlet gap 6 between a conventional web permeable and flat Formiersieb 7 and a permeable and three-dimensionally structured sieve 8 is introduced. The structured sieve 8 in this case has a surface contacting the fibrous web, which has larger elevations and depressions compared to the surface of the flat sieve 7 contacting the fibrous web.

Nachdem die Faserstoffbahn 2 im Sandwich zwischen dem Formiersieb 7 und dem strukturierten Sieb 8 zur Entwässerung um eine Formierwalze 9 gelaufen ist, wird das Formiersieb 7 von der Faserstoffbahn 2 abgehoben und die Faserstoffbahn 2 auf dem strukturierten Sieb 8 der Pressenvorrichtung 3 zugeführt.After the fibrous web 2 has run in sandwich between the forming fabric 7 and the structured sieve 8 for dewatering around a forming roller 9, the forming fabric 7 is lifted from the fibrous web 2 and fed the fibrous web 2 on the structured sieve 8 of the press device 3.

In der Pressenvorrichtung 3 findet das erfindungsgemäße endlose Band 4 als Pressband Verwendung. Das Pressband 4 steht in der Pressenvorrichtung 3 unter einer Zugspannung von zumindest 30kN/m. Zur Bereitstellung eines verlängerten Pressnips wird das Pressband 4 über eine Gegenfläche geführt, die im vorliegenden Fall durch einen Abschnitt der Mantelfläche einer Saugwalze 10 im Bereich einer Saugzone Z gebildet ist. Zur Entwässerung der Tissuebahn 2 in der Pressenvorrichtung 3 wird die Tissuebahn 2 im Sandwich zwischen dem permeablen drei-dimensional strukturierten Sieb 8 und einem permeablen glatten als Pressfilz ausgebildeten Band 11 geführt. Hierbei kontaktiert das Pressband 4 das strukturierte Sieb 8 und das Pressfilz 11 stützt sich auf der Mantelfläche der Saugwalze 10 ab. Das Pressband 4 übt hierbei aufgrund seiner Zugspannung eine Presskraft auf das Sandwich bestehend aus strukturiertem Sieb 8, Faserstoffbahn 2 und Pressfilz 11 aus.In the press device 3, the endless belt 4 according to the invention is used as a press belt. The press belt 4 is in the press device 3 under a tensile stress of at least 30kN / m. To provide an extended press nip, the press belt 4 is guided over an opposing surface, which in the present case is formed by a section of the lateral surface of a suction roll 10 in the region of a suction zone Z. For dewatering the tissue web 2 in the press device 3, the tissue web 2 is guided in a sandwich between the permeable, three-dimensionally structured sieve 8 and a permeable, smooth press belt-shaped belt 11. In this case, the press belt 4 contacts the structured wire 8 and the press felt 11 is supported on the outer surface of the suction roll 10. Due to its tensile stress, the press belt 4 exerts a pressing force on the sandwich consisting of structured wire 8, fibrous web 2 and press felt 11.

Oberhalb der Pressbandes 4 ist nach eine Blassvorrichtung 16 angeordnet die bewirkt, dass ein Fluidstrom aus Heißluft und / oder Dampf durch das Pressband 4, das strukturierte Sieb 8, die Faserstoffbahn 2 und das Pressflz 11 zur Saugzone Z strömt. In der Pressenvorrichtung 3 wird demzufolge die Faserstoffbahn 2 durch das gleichzeitige Einwirken der Presskraft des Bandes 4 auf die Faserstoffbahn 2 und das in Richtung vom Pressband 4 zur Gegenfläche durch die Faserstoffbahn 2 strömende Fluid entwässert.Above the press belt 4, a blowing device 16 is arranged which causes a fluid stream of hot air and / or steam to flow through the press belt 4, the structured wire 8, the fibrous web 2 and the press belt 11 to the suction zone Z. Accordingly, in the press apparatus 3, the fibrous web 2 is dewatered by the simultaneous action of the pressing force of the band 4 on the fibrous web 2 and the fluid flowing in the direction from the press belt 4 to the counter surface through the fibrous web 2.

Nach dem Durchlauf durch die Pressenvorrichtung 3 wird das Pressfilz 11 von der Faserstoffbahn 2 abgehoben und diese auf dem strukturierten Sieb einem zwischen einer Presswalze 12 und einen Yankee-Trockenzylinder 13 gebildeten Pressnip 14 zur weiteren Entwässerung zugeführt.After passing through the press device 3, the press felt 11 is lifted off the fibrous web 2 and fed onto the structured wire to a press nip 14 formed between a press roll 12 and a Yankee drying cylinder 13 for further dewatering.

Nach dem Durchlauf durch den Pressnip 14 wird die Faserstoffbahn 2 vom strukturierten Sieb 8 abgehoben und auf der Mantelfläche des Yankee-Trockenzylinders 13 geführt um nachfolgend von diesem mittels einer Schabervorrichtung 15 davon abgehoben zu werden.After passing through the press nip 14, the fibrous web 2 is lifted off the structured sieve 8 and guided on the lateral surface of the Yankee drying cylinder 13 to be subsequently lifted therefrom by means of a scraper device 15 thereof.

Die Figur 2 zeigt die Kettfadenverläufe einer Rapporteinheit des erfindungsgemäßen Bandes 4, welches in der Maschine der Figur 1 zum Einsatz kommt. Das Band 4 weist den dargestellten Kettfadenverlauf sowohl im Bereich der flach gewobenen Webstruktur als auch im Verbindungsbereich auf, wobei sich das Webmuster des Gewebes von der flach gewobenen Webstruktur in den Verbindungsbereich ohne Unterbrechung oder Versatz fortsetzt.The FIG. 2 shows the Kettfadenverläufe a repeat unit of the tape 4 of the invention, which in the machine of FIG. 1 is used. The band 4 has the illustrated warp path both in the area of the flat-woven structure and in the connection area, wherein the weave pattern of the fabric continues from the flat-woven structure into the connection area without interruption or offset.

Vorliegend ist eine 5-schäftige Atlasbindung mit den als Kettfäden ausgebildeten Längsfäden K1 bis K5 gezeigt. In dem Rapport kreuzt jeder Kettfaden K1 bis K5 auf der Unterseite US des Gewebes laufend vier Schussfäden sowie auf der Oberseite OS des Gewebes laufen einen Schussfaden. Beispielhaft kreuzt der Kettfaden K1 auf der Unterseite US laufend die vier aufeinander folgenden Schussfäden S1 bis S4 bevor dieser auf der Oberseite OS laufend den Schussfaden S5 kreuzt.In the present case, a 5-strand satin weave with the longitudinal threads K1 to K5 designed as warp threads is shown. In the repeat, each warp thread K1 to K5 continuously crosses four weft threads on the underside US of the fabric and a weft thread runs on the upper side OS of the fabric. By way of example, the warp thread K1 on the underside US continuously crosses the four successive weft threads S1 to S4 before it continuously crosses the weft thread S5 on the upper side OS.

Vorliegend sind die Schussfäden lediglich nach ihrer Position und nicht danach bezeichnet, ob es sich um erste oder zweite Schussfäden handelt (Bem: es gibt die Zahl vor der Bezeichnung an, ob es sich um einen ersten oder zweiten Schussfaden handelt; es gibt die Zahl nach der Bezeichnung die Position des Schussfadens an).In the present case, the weft threads are indicated only by their position and not by whether they are first or second weft threads (NOTE: the number before the designation indicates whether it is a first or a second weft thread; the designation the position of the weft thread).

Die Tabelle 1 zeigt, die technischen Daten des erfindungsgemäßen Bandes der Figur 2.Table 1 shows the technical data of the band of the invention FIG. 2 ,

Die Figur 3a zeigt den Verlauf eines der Kettfäden K1 bis K5 des erfindungsgemäßen Bandes der Figur 2 in einem Abschnitt der flach gewobenen Webstruktur und in einem Abschnitt des Verbindungsbereichs.The FIG. 3a shows the course of one of the warp threads K1 to K5 of the tape of the invention FIG. 2 in a portion of the flat woven weave structure and in a portion of the joint region.

In der Darstellung der Figur 3a ist abschnittweise der Webpfad eines der Kettfäden K1 bis K5 zu sehen, wie dieser in der in der Figur 2 beschriebenen Art und Weise über mehrere Rapporte webt. Da alle Kettfäden K1 bis K5 gleiche Webpfade haben, die sich nur durch einen relativen Versatz in MD-Richtung zueinander entsprechend der in der Figur 2 gezeigten 5-schäftigen Atlasbindung unterscheiden, ist das Nachfolgende exemplarisch auf alle Webpfade der Kettfäden K1 bis K5 eines Kettrapports des Gewebes anwendbar. Der exemplarische Kettfaden ist mit dem Bezugszeichen Kx versehen, wobei x=1,2,3,4,5 sein kann.In the presentation of the FIG. 3a In some sections the weaving path of one of the warp threads K1 to K5 can be seen, like this one in the FIG. 2 weaves over several repeats described manner. Since all the warp threads K1 to K5 have the same weaving paths, which only by a relative offset in the MD direction to each other according to the in the FIG. 2 The following example can be applied to all weaving paths of the warp threads K1 to K5 of a warp repeat of the fabric. The exemplary warp is provided with the reference Kx, where x = 1,2,3,4,5.

Die paarweise parallelen Striche in der Figur 3a deuten eine Unterbrechung der Darstellung des sich in Realität fortsetzenden Webpfads des Kettfadens Kx an.The pairs of parallel lines in the FIG. 3a indicate an interruption in the representation of the actually continuing web path of the warp Kx.

Das endlose Band 4 ist für eine Anwendung ausgelegt, bei der eine Zugspannung von zumindest 30kN/m auf das Band einwirkt. Das endlose Band 4 wird nur durch ein einlagiges Gewebe 20 gebildet. Das Gewebe 20 ist durch eine flach gewobene Webstruktur 21 und einen Verbindungsbereich 22 gebildet.The endless belt 4 is designed for an application in which a tensile stress of at least 30 kN / m acts on the belt. The endless belt 4 is formed only by a single-ply fabric 20. The fabric 20 is formed by a flat woven weave structure 21 and a joining region 22.

Die flach gewobene Webstruktur 21 wird durch das Verweben der sich in MD-Richtung erstreckende Kettfäden K1 bis K5 und den damit verwobenen sich in CMD-Richtung erstreckende ersten Querfäden 1 S gebildet, wobei die ersten Querfäden 1 S Schussfäden sind.The flat woven weave structure 21 is formed by interweaving the warp yarns K1 to K5 extending in the MD direction and the first transverse yarns 1S extending therewith in the CMD direction, wherein the first transverse yarns are 1S weft yarns.

Die flach gewobene Webstruktur 21 ist in ihrer Längsausdehnung durch ein erstes längsseitiges Ende und ein zweites längsseitiges Ende begrenzt. Die beiden längsseitigen Enden der flach gewobenen Webstruktur sind in der Darstellung der Figur 3a aus Platzgründen nicht, dafür aber in der Darstellung der Figur 4 dargestellt. Erfindungsgemäß hat jeder Längsfaden Kx in seiner Längserstreckung betrachtet einen ersten Fadenendabschnitt, der in MD-Richtung über das erste längsseitige Ende der Webstruktur hinausragt, und einen zweiten Fadenendabschnitt, der in MD-Richtung über das zweite längsseitige Ende der Webstruktur hinausragt. In der Darstellung der Figur 3a sind der erste Fadenendabschnitt eines der Kettfäden K1 bis K5 mit dem Bezugszeichen Kx.1 und der zweite Fadenendabschnitt desselben Kettfadens Kx mit dem Bezugszeichen Kx.2 versehen.The flat-woven structure 21 is limited in its longitudinal extent by a first longitudinal side end and a second longitudinal side end. The two longitudinal ends of the flat woven weave structure are in the representation of FIG. 3a for reasons of space not, but in the presentation of FIG. 4 shown. According to the invention, each longitudinal thread Kx viewed in its longitudinal extent has a first thread end section, which protrudes beyond the first longitudinal end of the woven structure in the MD direction, and a second thread end section, which projects beyond the second longitudinal end of the woven structure in the MD direction. In the presentation of the FIG. 3a the first yarn end portion of one of the warp yarns K1 to K5 are provided with the reference character Kx.1 and the second yarn end portion of the same warp yarn Kx is provided with the reference symbol Kx.2.

Erfindungsgemäß sind die beiden längsseitigen Enden der flach gewobenen Webstruktur zum endlos machen des Bandes durch den Verbindungsbereich 22 miteinander verbunden, indem die ersten und die zweiten Endabschnitte der Längsfäden K1 bis K5 mit zweiten als Schussfäden ausgebildeten Querfäden 2S so verwoben sind, dass sich das Webmuster der flach gewobenen Webstruktur 21 ohne Unterbrechung durch das Webmuster des Verbindungsbereichs 22 fortsetzt. Folglich haben die flach gewobene Webstruktur 21 und der Verbindungsbereich 22 das gleiche Webmuster.According to the invention, the two longitudinal ends of the flat-woven structure for endless making the band through the connecting portion 22 are interconnected by the first and the second end portions of the longitudinal yarns K1 to K5 are woven with second formed as weft yarns cross-threads 2S so that the weave of the flat woven structure 21 continues without interruption by the weave pattern of the connection region 22. As a result, the flat-weaved weave structure 21 and the bonding portion 22 have the same weave pattern.

In der Darstellung des Webpfads des Kettfadens Kx erkennt man, dass der erste Fadenendabschnitt Kx.1 des Kettfadens Kx mit den zweiten Querfäden 2S sowie der zweite Fadenendabschnitt Kx.2 desselben Kettfadens Kx mit den zweiten Querfäden 2S verwoben ist.In the representation of the weaving path of the warp Kx it can be seen that the first yarn end section Kx.1 of the warp Kx is woven with the second transverse yarns 2S and the second yarn end section Kx.2 of the same warp Kx is woven with the second transverse yarns 2S.

Beim Verweben der Fadenendabschnitte der Kettfäden K1 bis K5 bilden die Fadenendabschnitte eine Vielzahl von Paaren aus jeweils einem ersten und einem zweiten Fadenendabschnitt aus, bei denen die beiden Fadenendabschnitte in CMD-Richtung betrachtet unmittelbar nebeneinander angeordnet sind und bei denen die beiden Fadenendabschnitte in MD-Richtung betrachtet einen gemeinsamen Überlappungsbereich bilden, indem der erste Endabschnitt des Paares mit den selben zumindest 15 aufeinander folgenden zweiten Querfäden 2S verwoben ist, mit denen auch der zweite Endabschnitt des Paares verwoben ist und indem die beiden Endabschnitte des Paares im Überlappungsbereich dem gleichen Webpfad folgen. Beim erfindungsgemäßen Band der Figur 3a bilden immer der erste und der zweite Fadenendabschnitt Kx.1 und Kx.2 desselben Längsfadens Kx ein Paar bei denen die beiden Fadenendabschnitte Kx.1 und Kx.2 in CMD-Richtung betrachtet unmittelbar nebeneinander angeordnet sind, d.h. es ist kein Fadenendabschnitt eines anderen Kettfadens zwischen den das Paar bildenden Fadenendabschnitten angeordnet. Des weiteren bilden in MD-Richtung die beiden Fadenendabschnitte Kx.1 und Kx.2 desselben Kettfadens Kx einen Überlappungsbereich Üy aus, indem der erste Endabschnitt des Paares Kx.1 mit den selben achtzehn aufeinander folgenden zweiten Querfäden 2S verwoben ist, mit denen auch der zweite Endabschnitt Kx.2 des Paares verwoben ist und indem die beiden Endabschnitte Kx.1 und Kx.2 des Paares im Überlappungsbereich Üy dem gleichen Webpfad folgen.When weaving the yarn end portions of the warp yarns K1 to K5, the yarn end portions form a plurality of pairs of first and second yarn end portions in which the two yarn end portions are arranged side by side in the CMD direction and where the two yarn end portions are in the MD direction contemplated forming a common overlap region by interweaving the first end portion of the pair with the same at least 15 consecutive second transverse threads 2S with which the second end portion of the pair is interwoven and in that the two end portions of the pair in the overlap region follow the same weaving path. In the band of the invention FIG. 3a always form the first and second yarn end portion Kx.1 and Kx.2 the same longitudinal thread Kx a pair in which the two yarn end sections Kx.1 and Kx.2 viewed in the CMD direction are arranged directly next to each other, ie there is no Fadenendabschnitt another warp thread arranged between the yarn end sections forming the pair. Furthermore, in the MD direction, the two thread end sections Kx.1 and Kx.2 of the same warp thread Kx form an overlapping area Üy by interweaving the first end section of the pair Kx.1 with the same eighteen consecutive second transverse threads 2S with which the first end section second end section Kx.2 of the pair is interwoven and in that the two end sections Kx.1 and Kx.2 of the pair in the overlapping area Üy follow the same weaving path.

Aus der Darstellung der Figur 3a erkennt man ferner, dass jeder Überlappungsbereich Üy in MD-Richtung betrachtet dadurch beendet ist, indem der erste Fadenendabschnitt Kx.1 und der zweite Fadenendabschnitt kx.2 zu einer Außenseite des Gewebes 20 geführt ist. Die beiden Enden des Überlappungsbereichs Üy sind in der Figur 3a mit 1 Ey und 2Ey bezeichnet.From the representation of FIG. 3a Furthermore, it can be seen that each overlapping area Üy viewed in the MD direction is completed by the first thread end section Kx.1 and the second thread end section kx.2 being guided to an outer side of the fabric 20. The two ends of the overlap area Üy are in the FIG. 3a with 1 Ey and 2Ey.

Da der in der Figur 3a dargestellte Kettfadenverlauf Kx stellvertretend für alle Kettfadenverläufe K1 bis K5 ist, hat beim dargestellten Band jeder Überlappungsbereich Ü1 bis Ü5 die gleiche Anzahl von zweiten Querfäden.Since in the FIG. 3a illustrated Kettfadenverlauf Kx is representative of all Kettfadenverläufe K1 to K5, in the illustrated band each overlap area Ü1 to Ü5 has the same number of second transverse threads.

Die Figur 3b zeigt die fünf in CMD-Richtung aufeinander folgenden Überlappungsbereiche Ü1 bis Ü5. Der Versatz zueinander benachbarter Überlappungsbereiche beträgt vorliegend jeweils 40 zweite Querfäden 2S, wobei der Versatz immer durch den geringsten Abstand des einen Endes eines Überlappungsbereichs von dem Ende des folgenden Überlappungsbereichs bestimmt wird, welches dem erstgenannten Ende am nächsten liegt. Beispielsweise wird der Versatz zwischen den beiden aufeinander folgenden Überlappungsbereichen Ü1 und Ü2 durch den Abstand zwischen dem Ende 2E1 des Überlappungsbereichs Ü1 und dem Ende 1 E2 des Überlappungsbereichs Ü2 bestimmt. Weiter wird beispielsweise der Versatz zwischen den beiden aufeinander folgenden Überlappungsbereichen Ü2 und Ü3 durch den Abstand zwischen dem Ende 2E2 des Überlappungsbereichs Ü2 und dem Ende 1 E3 des Überlappungsbereichs Ü3 festgelegt. Das Prinzip setzt sich bei den weiteren Überlappungsbereichen fort.The FIG. 3b shows the five in the CMD direction consecutive overlap areas Ü1 to Ü5. The offset of mutually adjacent overlapping areas here is in each case 40 second transverse threads 2S, the offset always being determined by the smallest distance of the one end of an overlapping area from the end of the following overlapping area which is closest to the first-mentioned end. For example, the offset between the two successive overlapping areas Ü1 and Ü2 is determined by the distance between the end 2E1 of the overlapping area Ü1 and the end 1E2 of the overlapping area Ü2. Further, for example, the offset between the two successive overlapping areas Ü2 and Ü3 is set by the distance between the end 2E2 of the overlapping area Ü2 and the end 1E3 of the overlapping area Ü3. The principle continues with the other overlapping areas.

Die Figur 4 zeigt in Draufsicht abschnittweise den Verbindungsbereich 22 und die flach gewobene Webstruktur 21 des erfindungsgemäßen Bandes 4 der Figuren 2 und 3.The FIG. 4 shows in plan view sections, the connecting portion 22 and the flat-woven structure 21 of the band 4 of the invention Figures 2 and 3 ,

Die Darstellung der Figur 4 zeigt insbesondere im Verbindungsbereich 22 die relative Anordnung der Überlappungsbereiche zueinander. Ferner zeigt die Figur 4 einen Ausschnitt der flach gewobenen Struktur 21 sowie die beiden die flach gewobene Struktur begrenzenden Enden 23 und 24, welche beim endlosen Band 4 durch den Verbindungsbereich 22 miteinander verbunden sind. Die Figur 4 zeigt das Band 4 sowohl nur in einer Teillänge als auch nur in einer Teilbreite.The presentation of the FIG. 4 shows in particular in the connection region 22, the relative arrangement of the overlapping areas to each other. Furthermore, the shows FIG. 4 a section of the flat-woven structure 21 and the two flat-woven structure limiting ends 23 and 24, which are connected to each other in the endless belt 4 through the connecting portion 22. The FIG. 4 shows the band 4 both only in a partial length and in only a partial width.

Der dargestellte Ausschnitt des Verbindungsbereichs zeigt drei in CMD-Richtung nebeneinander angeordnete Rapporte R1, R2, R3 der Anordnung von Überlappungsbereichen. In MD-Richtung betrachtet erstreckt sich der Verbindungsbereich über die Länge eines Rapports. Jeder Rapport R1, R2 und R3 von Überlappungsbereichen wird durch die Überlappungsbereiche Ü1 bis Ü35 gebildet. Daher ist der Rapport R1, R2 und R3 der Anordnung der Überlappungsbereiche größer als der Rapport, der das durch die Kettfäden K1 bis K5 und die Schussfäden S1 bis S5 gebildete Webmuster der flach gewobenen Webstruktur 21 bzw. des Verbindungsbereichs 22 bildet. Überlappungsbereiche Ü1 bis Ü35, die in CMD-Richtung betrachtet unmittelbar nebeneinander angeordnet sind, sind in MD-Richtung betrachtet relativ zueinander versetzt. So sind bspw. die beiden aufeinander folgenden Überlappungsbereiche Ü1 und Ü2 um 40 zweite Querfäden 2S zueinander versetzt, wobei der Versatz immer durch den geringsten Abstand des einen Endes eines Überlappungsbereichs zu dem Ende des folgenden Überlappungsbereichs bestimmt wird, welches dem erstgenannten Ende am nächsten liegt.The illustrated section of the connection region shows three in the CMD direction side by side arranged repeats R1, R2, R3 of the arrangement of overlapping areas. Viewed in the MD direction, the connection area extends over the length of a repeat. Each repeat R1, R2 and R3 of overlap areas is formed by the overlap areas Ü1 to Ü35. Therefore, the repeat R1, R2 and R3 of the arrangement of the overlapping areas is larger than the repeat forming the weave pattern formed by the warp yarns K1 to K5 and the weft yarns S1 to S5 of the flat-weaved woven structure 21 and the joining area 22, respectively. Overlapping areas Ü1 to Ü35, which are arranged next to one another in the CMD direction, are offset relative to one another in the MD direction. Thus, for example, the two successive overlapping areas Ü1 and Ü2 are staggered by 40 second transverse threads 2S, the offset always being determined by the smallest distance of one end of an overlapping area to the end of the following overlapping area which is closest to the first-mentioned end.

Vorliegend haben zumindest einige Überlappungsbereiche eines Rapports, die in CMD-Richtung betrachtet unmittelbar aufeinander folgen, jeweils den gleichen Versatz zueinander. Beispielsweise haben sämtliche der jeweils aufeinander folgenden Überlappungsbereiche Ü1 bis Ü9 jeweils einen gleichen Versatz zueinander.In the present case, at least some overlapping areas of a rapport, which in CMD direction considered immediately follow each other, each with the same offset to each other. For example, all of the successive overlapping areas Ü1 to Ü9 each have the same offset from each other.

Sämtliche Überlappungsbereiche liegen auf einer Schar zueinander paralleler Geraden, wobei aufeinander folgende, jeweils auf einer Gerade angeordnete Überlappungsbereiche stets den gleichen Versatz zueinander haben und wobei alle Geraden der Schar zueinander gleich beabstandet sind.All overlapping areas lie on a family of mutually parallel straight lines, whereby successive overlapping areas, each arranged on a straight line, always have the same offset relative to one another and wherein all the straight lines of the crowd are equally spaced from one another.

Vorliegend beträgt die Längserstreckung des Verbindungsbereichs, definiert durch die beiden Überlappungsbereiche Ü34 und Ü35, die in MD-Richtung betrachtet, voneinander am meisten beabstandet sind, 60cm.In the present case, the longitudinal extent of the connection area, defined by the two overlapping areas Ü34 and Ü35, which are viewed in the MD direction, are the most widely spaced, 60 cm.

Das Band ist permeabel und hat vorliegend eine Permeabilität von 353,7 dm3/s (750cfm).The tape is permeable and in the present case has a permeability of 353.7 dm 3 / s (750 cfm).

Die Figur 5 zeigt eine weitere Ausführungsform eines erfindungsgemäßen Bandes 4. Vorliegend sind gleiche Merkmale mit gleichen Bezugszeichen wie in den vorangegangenen Figuren versehen. Das vorliegende Band 4 hat im Verbindungsbereich 22 in MD-Richtung betrachtet einen Abschnitt A, in dem sich sämtliche Überlappungsbereiche Üa bis Üe erstrecken.The FIG. 5 shows a further embodiment of a tape according to the invention 4. In the present case, the same features are provided with the same reference numerals as in the preceding figures. The present tape 4, viewed in the MD-direction in the connection region 22, has a section A in which all overlapping regions Ua to Üe extend.

Claims (21)

  1. Endless belt (4) for a machine (1) for the production of a fibrous material web (2), the belt being designed for an application where a tensile stress of at least 30 kN/m acts on the belt (4), comprising a fabric (20) formed by a flat woven structure (21) and a connecting region (22):
    - the flat woven structure (21) comprising longitudinal threads (Kx) extending in the MD direction and first transverse threads (1Sx) woven therewith and extending in the CMD direction,
    - the flat woven structure (21) being delimited in its longitudinal extent by a first end on the longitudinal side and a second end on the longitudinal side,
    - each longitudinal thread (Kx), viewed in its longitudinal extent, having a first thread end section, which protrudes beyond the first end of the woven structure (21) on the longitudinal side in the MD direction, and a second thread end section, which protrudes beyond the second end of the woven structure (21) on the longitudinal side in the MD direction,
    - the two ends on the longitudinal sides of the flat woven structure (21) being connected to each other by the connecting region (22), which is formed by weaving the first and second end sections of the longitudinal threads (Kx) with second transverse threads (2Sx), and thereby
    - forming a large number of pairs of a first and a second thread end section in each case, in which the two thread end sections, viewed in the CMD direction, are arranged directly beside each other, and in which the two thread end sections, viewed in the MD direction, form a common overlapping region (Üy), in that the two end sections of the pair follow the same weaving path, characterized in that
    the first end section of the pair is woven with the same at least 15 consecutive second transverse threads (2Sx), with which also the second end section of the pair is woven.
  2. Endless belt according to Claim 1,
    characterized in that,
    as viewed in the MD direction, each overlapping region (Üy) is terminated by the first and the second thread end section being led to an outer side of the fabric (21).
  3. Endless belt according to Claim 1 or 2, characterized in that
    the overlapping regions (Üy) comprise up to 60 consecutive second transverse threads (2Sx), preferably 18 to 25 consecutive second transverse threads (2Sx).
  4. Endless belt according to one of the preceding claims,
    characterized in that
    each overlapping region (Üy) comprises the same number of second transverse threads (2Sx).
  5. Endless belt according to one of the preceding claims,
    characterized in that
    the first and the second thread end section of the same longitudinal thread (Kx) always form a pair.
  6. Endless belt according to one of the preceding claims,
    characterized in that,
    viewed in the MD direction, the connecting region (22) has a section in which all the overlapping regions (Üy) extend.
  7. Endless belt according to one of the preceding claims,
    characterized in that
    the overlapping regions (Üy) following one another in the CMD direction, viewed in the MD direction, are offset in relation to one another.
  8. Endless belt according to one of the preceding claims,
    characterized in that
    the offset of at least some consecutive overlapping regions (Üy) comprises 20 to 60, preferably 30 to 40, consecutive second transverse threads (2Sx).
  9. Endless belt according to either of Claims 7 and 8,
    characterized in that
    a large number of consecutive overlapping regions (Üy) each have the same offset in relation to one another.
  10. Endless belt according to one of the preceding claims,
    characterized in that
    the flat woven structure (21) and the connecting region (22) have the same weaving pattern.
  11. Endless belt according to one of the preceding claims,
    characterized in that
    the fabric (20) has one layer or more layers.
  12. Endless belt according to one of the preceding claims,
    characterized in that
    the weaving pattern of the flat woven structure (21) is repeated in repeats (R), a repeat (R) preferably forming either a plain weave or a 5-shaft satin weave.
  13. Endless belt according to Claim 12,
    characterized in that
    the arrangement of the overlapping regions (Üy) is repeated in repeats (R), a repeat (R) of the arrangement of the overlapping regions (Üy) comprising more longitudinal threads (Kx) and/or more transverse threads (Sx) than a repeat (R) of the flat woven structure (21).
  14. Endless belt according to one of the preceding claims,
    characterized in that
    the longitudinal extent of the connecting region (22), defined by the two overlapping regions (Üy) which are furthest apart from each other, as viewed in the MD direction, is between 5 cm and 100 cm, preferably between 10 cm and 70 cm, particularly preferably between 40 cm and 60 cm.
  15. Endless belt according to one of the preceding claims,
    characterized in that
    the belt (4) is formed only by the fabric (20).
  16. Endless belt according to one of the preceding claims,
    characterized in that
    the belt (4) is permeable and preferably has a permeability between 47,2 dm3/s (100 cfm) and 566 dm3/s (1200 cfm), preferably between 141,5 dm3/s (300 cfm) and 377,3 dm3/s (800 cfm).
  17. Endless belt according to one of the preceding claims,
    characterized in that
    the belt (4) is designed for an application in which a tensile stress between 40 and 70 kN/m acts on the belt.
  18. Endless belt according to one of the preceding claims,
    characterized in that
    the longitudinal threads (Kx) are warp threads and the transverse threads (Sx) are weft threads.
  19. Pressing apparatus (3) for a machine (1) for the production of a fibrous material web (2), in which use is made of an endless belt (4) according to one of Claims 1 to 14 as a press belt which is under a tensile stress of at least 30 kN/m and, in order to provide an extended press nip (14), is led over an opposing surface which is preferably formed by a section of the circumferential surface of a roll, in particular a suction roll (10), the fibrous material web (2) being led between the belt (4) and the opposing surface and the belt (4) exerting a pressing force on the fibrous material web (2) on account of its tensile stress.
  20. Pressing apparatus according to Claim 19, characterized in that
    the fibrous material web (2) is led in the sandwich between a permeable three-dimensionally structured fabric (8) and a permeable smooth belt (11), in particular a press felt, the press belt (4) making contact with the structured fabric and the smooth belt (11) making contact with the opposing surface.
  21. Pressing apparatus according to Claim 19 or 20, characterized in that
    the fibrous material web (2) is dewatered in the direction of the opposing surface by means of the pressing force of the belt (11) and the action of at least one fluid flowing in the direction from the press belt (4) toward the opposing surface.
EP08709011A 2007-02-21 2008-02-15 Belt for paper machine Not-in-force EP2129829B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL08709011T PL2129829T3 (en) 2007-02-21 2008-02-15 Belt for paper machine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007008500A DE102007008500A1 (en) 2007-02-21 2007-02-21 press belt
PCT/EP2008/051821 WO2008101865A1 (en) 2007-02-21 2008-02-15 Press belt

Publications (2)

Publication Number Publication Date
EP2129829A1 EP2129829A1 (en) 2009-12-09
EP2129829B1 true EP2129829B1 (en) 2010-08-11

Family

ID=39415119

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08709011A Not-in-force EP2129829B1 (en) 2007-02-21 2008-02-15 Belt for paper machine

Country Status (14)

Country Link
US (1) US20100032120A1 (en)
EP (1) EP2129829B1 (en)
JP (1) JP2010519420A (en)
KR (1) KR20090125106A (en)
CN (1) CN101680177A (en)
AT (1) ATE477369T1 (en)
BR (1) BRPI0807307A2 (en)
CA (1) CA2679296A1 (en)
DE (2) DE102007008500A1 (en)
ES (1) ES2348063T3 (en)
MX (1) MX2009008917A (en)
PL (1) PL2129829T3 (en)
RU (1) RU2009134276A (en)
WO (1) WO2008101865A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007042201A1 (en) * 2007-09-05 2009-03-19 Voith Patent Gmbh Belt for a machine for producing web material, in particular paper or cardboard
DE102010026609B3 (en) * 2010-07-09 2011-11-17 Lindauer Dornier Gesellschaft Mit Beschränkter Haftung Method and apparatus for weaving patterns on fabrics with added weft effects
DE102010034969B3 (en) 2010-08-20 2011-11-03 Lindauer Dornier Gesellschaft Mit Beschränkter Haftung Weaving and weaving machine for weaving patterns in fabrics with additional pattern effects

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US926004A (en) * 1908-01-06 1909-06-22 Wilhelm Keller Method of joining or connecting fabrics.
DE901256C (en) * 1941-02-09 1954-01-07 Antonius Kufferath Method for producing a woven seam for making metal cloths endless, in particular for paper machines
DE2902880C2 (en) * 1979-01-25 1985-10-03 Hermann Wangner Gmbh & Co Kg, 7410 Reutlingen Process for making a multilayer dewatering screen endless and dewatering screen produced according to this process
JPS617120A (en) * 1984-06-19 1986-01-13 Yamauchi Rubber Ind Co Ltd Endless belt for enp
US5196092A (en) * 1991-09-25 1993-03-23 Albany International Corp. Reinforcement of coated surfaces of lnp belts
US7005038B2 (en) * 2001-10-05 2006-02-28 National Wire Fabric, Inc. Belt-machine combination
FI113674B (en) * 2002-12-18 2004-05-31 Tamfelt Oyj Abp Press felt
MXPA06007163A (en) * 2004-01-30 2007-01-19 Voith Paper Patent Gmbh Advanced dewatering system.
JP4712726B2 (en) * 2004-01-30 2011-06-29 ボイス ペ−パ− パテント ゲ−エムベ−ハ− Paper machine press and permeable belt
JP4403058B2 (en) * 2004-11-30 2010-01-20 日本フイルコン株式会社 Method for weaving industrial fabric and endless industrial fabric weaved thereby
JP4394563B2 (en) * 2004-11-30 2010-01-06 日本フイルコン株式会社 Method for weaving industrial fabric and endless industrial fabric weaved thereby
DE102006042812A1 (en) * 2006-09-08 2008-03-27 Voith Patent Gmbh Belt for a machine for producing web material, in particular paper, cardboard or tissue, and method for producing such a belt

Also Published As

Publication number Publication date
WO2008101865A1 (en) 2008-08-28
DE102007008500A1 (en) 2008-08-28
JP2010519420A (en) 2010-06-03
ATE477369T1 (en) 2010-08-15
US20100032120A1 (en) 2010-02-11
KR20090125106A (en) 2009-12-03
RU2009134276A (en) 2011-03-27
BRPI0807307A2 (en) 2014-05-06
CA2679296A1 (en) 2008-08-28
PL2129829T3 (en) 2011-02-28
EP2129829A1 (en) 2009-12-09
ES2348063T3 (en) 2010-11-29
CN101680177A (en) 2010-03-24
DE502008001124D1 (en) 2010-09-23
MX2009008917A (en) 2010-03-15

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