EP0370185B1 - Process for smoothing a paper or cardboard web - Google Patents

Process for smoothing a paper or cardboard web Download PDF

Info

Publication number
EP0370185B1
EP0370185B1 EP89116409A EP89116409A EP0370185B1 EP 0370185 B1 EP0370185 B1 EP 0370185B1 EP 89116409 A EP89116409 A EP 89116409A EP 89116409 A EP89116409 A EP 89116409A EP 0370185 B1 EP0370185 B1 EP 0370185B1
Authority
EP
European Patent Office
Prior art keywords
web
smoothing
smoothing zone
speed
belt
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP89116409A
Other languages
German (de)
French (fr)
Other versions
EP0370185B2 (en
EP0370185A1 (en
Inventor
Alfred Dr. Bubik
Hans Dr. Dahl
Rüdiger Dr. Kurtz
Herbert Holik
Peter Mirsberger
Harald Hess
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.)
Sulzer Escher Wyss GmbH
Original Assignee
Sulzer Escher Wyss GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=4268786&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0370185(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Sulzer Escher Wyss GmbH filed Critical Sulzer Escher Wyss GmbH
Priority to AT89116409T priority Critical patent/ATE76134T1/en
Publication of EP0370185A1 publication Critical patent/EP0370185A1/en
Application granted granted Critical
Publication of EP0370185B1 publication Critical patent/EP0370185B1/en
Publication of EP0370185B2 publication Critical patent/EP0370185B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus
    • D21G1/006—Calenders; Smoothing apparatus with extended nips

Definitions

  • the invention relates to a method for smoothing a paper or cardboard web of the type specified in the preamble of claim 1.
  • the long smoothing zone is formed between a smooth jacket of a heated roller and a belt partially wrapping around the jacket.
  • a not yet calendered paper or cardboard web is dried or moistened with respect to the web thickness more or less and then pressed with the web side of the higher moisture against the jacket of the heated roller by means of the belt.
  • One surface of the web is thus smoothed during the dwell time in the smoothing zone.
  • a desired smoothing process therefore only takes place on one side of the web.
  • the use of temperature and pressure in the smoothing zone is confusing and difficult to control.
  • the aim of the invention is a method for smoothing a paper or cardboard web, in which a web that is still wet can be smoothed as desired without having to first generate an asymmetrical moisture profile with respect to the web thickness.
  • the use of pressure and temperature during the smoothing process should be clear and easy to regulate.
  • the smoothing process can be made particularly clear and controllable as desired.
  • the method for smoothing a paper or cardboard web 1 moving in the web running direction (arrow) takes place in at least one smoothing zone 2 with a defined duration of the smoothing process.
  • the material is in the smoothing zone 2 during a dwell time which can be calculated from the length of the smoothing zone 2 and the web running speed.
  • this dwell time which is extended in accordance with the length of the smoothing zone, the material to be smoothed, i.e. the paper or cardboard web is exposed to an adjustable pressure in the smoothing zone 2.
  • the pressure can be relatively low.
  • Temperature is used over the surfaces 3 and 4 arranged on both sides of the web 1, which together with the moisture of the web 1 leads to the desired smoothing of the web.
  • the conditions can advantageously be chosen so that there are no overpressed points in a web of uneven basis weight. This takes place in the extended smoothing zone 2, which is sufficiently long to achieve a sufficient dwell time for the material in view of the web speed to be traveled.
  • the smoothing zone 2 must be long enough that the desired smoothing process can be completed during the dwell time and the desired smoothness can be achieved. In general, the higher the web running speed is to be, the longer the length of the smoothing zone must be.
  • pressure, temperature, humidity and the length of the smoothing zone are selected depending on which smoothness is to be achieved on which material and at which web speed.
  • a device which is shown as an example in the figures in various schematically illustrated versions, is used to carry out the method according to the invention.
  • the device has a smoothing zone 2, which is formed between two mutually facing surfaces 3 and 4.
  • the surfaces 3 and 4 run parallel to one another, are heatable and adjustable relative to one another, so that the web 1 can be exposed to a defined pressing pressure.
  • the surfaces 3 and 4 extend over a longitudinal section in the web running direction, which is indicated by an arrow.
  • the one surface 3 is a jacket 5 of a roller 6.
  • the second surface 4 is formed by means of an endless, flexible belt 7.
  • the belt 7 is supported in the direction of the roll shell 5 by means of a pressing-on support element 8. This has a concave to the band 7 Support surface, which is complementary to the radius of the roll shell 5.
  • the jacket 5 of the roller 6 and the belt 7 can be driven at the same speed as the running speed of the web 1. If it is technologically desired, differential speeds can also be used.
  • a flexible belt 19 can also be used, which is guided over roller rollers in a known manner, not shown here, and is formed into a convex shape in the smoothing zone 2 by means of a support element 18.
  • the convex support surface is complementary to the oppositely arranged concave surface of the support element 8.
  • a e.g. Induction heating for the band 19 is indicated in Fig. 1 and designated 20.
  • Another applicable device, e.g. for heating with steam or hot air is also indicated in Fig. 1 and designated 21. This would advantageously be used especially when it was a non-metal band 19.
  • the pressure to be applied in the smoothing zone 2 can be generated by adjusting the pressure in the pressure medium of the support element 8 or the support elements 8 and 18.
  • the surface temperature of the smoothing surface can be adjusted by means of the devices 20 and 21.
  • the moisture is given by the moisture of the web 1 to be treated.
  • the flexible bands are tight, i.e. impermeable, and between the band and the support surface of the support element a liquid layer is provided, which is built up in a hydrostatic and / or hydrodynamic manner. It ensures that the belt runs smoothly along the support surfaces.
  • the liquid could be tempered for heating as well as for cooling.
  • the support elements can be sliding shoes known per se, with a liquid being introduced between the support surface and the band.
  • the support elements can also be hydrostatic support elements known per se.
  • both the pressure and the temperature in the smoothing zone 2 can be adjusted as required, if desired, in a graduated manner. If a smoothing gap is not sufficient or if only one surface per gap is designed to be heatable, it is advantageous to arrange two smoothing zones one behind the other, as shown in FIG. 1. If only one surface is used in a smoothing zone, it is advisable to heat the opposite surface so that the two sides of the web are smoothed one after the other on one surface.
  • Another embodiment provides endless, flexible belts 7, which form the two surfaces 3 and 4.
  • the bands are supported by mutually adjustable support elements 9, see FIGS. 2 and 4, each of which has a flat support surface facing the band 7. They can be pressed against one another in a known manner in a defined manner.
  • hydrostatic support elements are shown here, sliding blocks of a known type can also be used.
  • a liquid layer is provided between each belt 7 and the flat support surface of the support element 9, which is built up hydrostatically in the example according to FIG. 2.
  • the support element has pressure pockets 23 which are open to the band 7 and can be acted upon by a pressure medium, optionally tempered for heating or cooling. It is also possible to build up the liquid layer in a hydrodynamic manner, e.g. 3 could be the case on surface 3 in FIG.
  • one surface 3 is formed by means of a dense, impermeable band 7.
  • the second surface 4 is formed by a wall 12 adjacent to the web 1, which delimits a pressure chamber of a box-shaped support element 13 that can be adjusted against the web 1.
  • the wall 12 is designed for the passage of a gaseous medium which can be introduced under pressure through a line 22 into the pressure space under the wall.
  • the support element is piston-like embedded in a support 24, a pressure chamber 25 being provided which can be pressurized with a pressure medium for pressing the support element in the direction of the web 1.
  • a gas layer is formed, which through the gaseous or vaporous medium is built up.
  • the pressure chamber 25 is also supplied with a gaseous or vaporous medium, which from there can reach the pressure chamber under the wall 12 through one or more bores 22 '(FIG. 7).
  • Brushing the surface of the web may also be desirable in the method. This could be done by means of a brush roller 15, FIG. 5, which could be used instead of the roller 6 shown in FIG. 1, for example. If this brush roller is divided transversely to the paper running direction and the parts are driven at different speeds, this can advantageously influence the gloss / smooth cross profile.
  • Another advantageous embodiment offers itself by using a frame which is equipped with brush rollers 26 and forms at least one of the surfaces 3 or 4. This frame is part of a box-shaped support element 27 which can be pressed against a web and in which it delimits a pressure space which can be acted upon by a gaseous medium, for example steam. During operation, the medium penetrates through the frame to the adjacent surface of the web 1.
  • the brushes can be driven at a speed which differs from the web speed. If brushes which are arranged transversely to the direction of web travel and are shorter than the web width are used, it is expedient to arrange brushes lying behind one another laterally offset in order to avoid stripes. Here, too, there are advantages due to different speeds of the Rol len conceivable.
  • a support element similar to the one described above, the frame of which is equipped with smooth rollers of smaller diameter, could also be of use in paper technology.
  • a longer smoothing zone 2 can also be formed by means of at least two rows of support elements 9 arranged one behind the other in the web running direction, by means of which the belts 7 are supported, as is particularly clearly shown in FIG. 4.

Abstract

The smoothing takes place in a smoothing zone (2), in which the operation is carried out under pressure using temperature and moisture. The desired smoothness is achieved with a correspondingly long residence time of the web of material (1) in a smoothing zone (2) which is correspondingly long having regard to the velocity of the web. A still moist web (1) is guided between heatable surfaces (3, 4) which are arranged on both sides of the web (1), face each other across the web, extend in parallel and can each be pressed against the web. The surfaces (3, 4) are constructed over their entire length for forming and holding a given, defined contour of smoothing zone (2). The one surface (3) is, for example, constructed as an outer surface (5) of a heated cylinder (6) and the second surface (4) is constructed as a continuous flexible belt (7) which can be pressed towards the outer surface (5) of the cylinder by means of a concave support element (8). <??>If desired, the web (1) can be smoothed on both sides using the method. <IMAGE>

Description

Die Efindung betrifft ein Verfahren zum Glätten einer Papier- oder Kartonbahn der im Oberbegriff des Patentanspruchs 1 angegebenen art.The invention relates to a method for smoothing a paper or cardboard web of the type specified in the preamble of claim 1.

Ein solches Verfahren ist aus der Europäischen Patentanmeldung Nr. 0 141 614 A2 bekannt. Die lange Glättzone wird zwischen einem glatten Mantel einer beheizten Walze und einem den Mantel teilweise umschlingenden Band gebildet. Eine noch nicht kalandrierte Papier- oder Kartonbahn wird bezüglich der Bahndicke mehr oderweniger getrocknet oder befeuchtet und anschließend mit der Bahnseite der höheren Feuchte gegen den Mantel der beheizten Walze mittels des Bandes angedrückt. Die eine Oberfläche der Bahn wird damit während der Verweilzeit in der Glättzone geglättet. Ein gewünschter Glättvorgang erfolgt also nur an einer Seite der Bahn. Während des Glättvorgangs ist der Einsatz von Temperatur und Druck in der Glättzone unübersichtlich und schwer kontrollierbar.Such a method is known from European Patent Application No. 0 141 614 A2. The long smoothing zone is formed between a smooth jacket of a heated roller and a belt partially wrapping around the jacket. A not yet calendered paper or cardboard web is dried or moistened with respect to the web thickness more or less and then pressed with the web side of the higher moisture against the jacket of the heated roller by means of the belt. One surface of the web is thus smoothed during the dwell time in the smoothing zone. A desired smoothing process therefore only takes place on one side of the web. During the smoothing process, the use of temperature and pressure in the smoothing zone is confusing and difficult to control.

Ziel der Erfindung ist ein Verfahren zum Glätten einer Papier- oder Kartonbahn, bei dem eine noch feuchte Bahn, ohne zuvor in aufwendiger Weise ein asymmetrisches Feuchteprofil bezüglich der Bahndicke erzeugen zu müssen, jeweils wie gewünscht geglättet werden kann. Dabei sollen der Einsatz von Druck und Temperatur während des Glättvorgangs übersichtlich und gut regulierbar sein.The aim of the invention is a method for smoothing a paper or cardboard web, in which a web that is still wet can be smoothed as desired without having to first generate an asymmetrical moisture profile with respect to the web thickness. The use of pressure and temperature during the smoothing process should be clear and easy to regulate.

Dieses Ziel wird durch Maßnahmen, die im Kennzeichen des Patentanspruchs 1 angegeben sind, erreicht.This goal is achieved by measures specified in the characterizing part of patent claim 1.

Durch Anwendung von Maßnahmen, die in den Unteransprüchen angegeben sind, läßt sich der Glättvorgang besonders übersichtlich und kontrollierbar nach Wunsch gestalten.By applying measures that are specified in the subclaims, the smoothing process can be made particularly clear and controllable as desired.

Da in der langen Glättzone über die Stützelemente ein relativ niedriger Druck eingesetzt werden kann, werden an Stellen höheren Flächengewichts der Papier- oder Kartonbahn Druckspitzen weitgehend vermieden und eine bessere Qualität des Produkts erzielt. Es können durch die relativ lange Glättzone und genügend lange Verweilzeit des Materials in der Glättzone und damit die gewünschten Glättwerte beiderseits der Bahn auch bei höheren Bahngeschwindigkeiten erreicht werden. Insbesondere die Anwendung niedrigerer Drücke und hoher Temperaturen der anpreßbaren Flächen in Verbindung mit höheren Bahnfeuchten begünstigen eine das Volumen der Bahn schonende Glättung, was hier gewünscht wird.Since a relatively low pressure can be used in the long smoothing zone via the support elements, pressure peaks are largely avoided in places of higher grammage of the paper or cardboard web and a better quality of the product is achieved. The relatively long smoothing zone and sufficiently long dwell time of the material in the smoothing zone and thus the desired smoothing values on both sides of the web can also be achieved at higher web speeds. In particular, the use of lower pressures and high temperatures of the pressable surfaces in connection with higher web moisture favor a smoothing that is gentle on the volume of the web, which is desired here.

Im weiteren wird der Erfindungsgegenstand näher beschrieben und erklärt. Die Beschreibung bezieht sich auf eine Zeichnung, in welcher zeigen:

  • Fig.1 ein erstes Ausführungsbeispiel in einer dazu vorgesehenen Vorrichtung,
  • Fig. 2 bis 4 weitere Ausführungsbeispiele,
  • Fig. 5 eine Bürstenwalze und
  • Fig. 6 ein Stützrahmen mit Bürstenrollen,
  • Fig. 7 ein weiteres Ausführungsbeispiel mit einem Stützelement.
The subject matter of the invention is described and explained in more detail below. The description refers to a drawing, in which:
  • 1 shows a first exemplary embodiment in a device provided for this purpose,
  • 2 to 4 further embodiments,
  • Fig. 5 is a brush roller and
  • 6 is a support frame with brush rollers,
  • Fig. 7 shows another embodiment with a support element.

Das Verfahren zum Glätten einer in der Bahnlaufrichtung (Pfeil) sich bewegenden Papier- oder Kartonbahn 1 vollzieht sich in mindestens einer Glättzone 2 bei einer definierten Dauer des Glättvorgangs. Das Material befindet sich in der Glättzone 2 während einer Verweilzeit, die aus der Länge der Glättzone 2 und der Bahnlaufgeschwindigkeit errechenbar ist. Während dieser entsprechend der Länge der Glättzone verlängerten Verweilzeit wird das zu glättende Material, d.h. die Papier- oder Kartonbahn einem einstellbaren Druck in der Glättzone 2 ausgesetzt. Bei einer vorteilhaften Wahl der Bedingungen kann der Druck relativ niedrig sein. Über die beiderseits der Bahn 1 angeordneten Flächen 3 und 4 kommt es zum Einsatz von Temperatur, was zusammen mit der Feuchtigkeit der Bahn 1 zur gewünschten Glättung der Bahn führt. Die Bedingungen können vorteilhaft so gewählt werden, daß keine überpreßten Stellen in einer Bahn ungleichmäßigen Flächengewichts entstehen. Dies geschieht in der verlängerten Glättzone 2, die ausreichend lang ist, um in ihr eine genügende Verweilzeit des Materials in Anbetracht der zu fahrenden Bahngeschwindigkeit zu erreichen. Die Glättzone 2 muß so lang sein, daß der gewünschte Glättvorgang während der Verweilzeit abgeschlossen und die gewünschte Glätte erreicht werden kann. Je höher die Bahnlaufgeschwindigkeit sein soll, desto länger muß im allgemeinen die Länge der Glättzone ausgestaltet werden.The method for smoothing a paper or cardboard web 1 moving in the web running direction (arrow) takes place in at least one smoothing zone 2 with a defined duration of the smoothing process. The material is in the smoothing zone 2 during a dwell time which can be calculated from the length of the smoothing zone 2 and the web running speed. During this dwell time which is extended in accordance with the length of the smoothing zone, the material to be smoothed, i.e. the paper or cardboard web is exposed to an adjustable pressure in the smoothing zone 2. With an advantageous choice of conditions, the pressure can be relatively low. Temperature is used over the surfaces 3 and 4 arranged on both sides of the web 1, which together with the moisture of the web 1 leads to the desired smoothing of the web. The conditions can advantageously be chosen so that there are no overpressed points in a web of uneven basis weight. This takes place in the extended smoothing zone 2, which is sufficiently long to achieve a sufficient dwell time for the material in view of the web speed to be traveled. The smoothing zone 2 must be long enough that the desired smoothing process can be completed during the dwell time and the desired smoothness can be achieved. In general, the higher the web running speed is to be, the longer the length of the smoothing zone must be.

Der Einsatz von Druck, Temperatur, Feuchtigkeit und die Länge der Glättzone werden in Abhängigkeit davon gewählt, welche Glätte an welchem Material und bei welcher Bahngeschwindigkeit erreicht werden soll.The use of pressure, temperature, humidity and the length of the smoothing zone are selected depending on which smoothness is to be achieved on which material and at which web speed.

Eine Vorrichtung, die als Beispiel in den Figuren in verschiedenen schematisch dargestellten Versionen gezeigt ist, dient zum Ausführen des erfindungsgemäßen Verfahrens. Die Vorrichtung hat eine Glättzone 2, die zwischen zwei zueinander weisenden Flächen 3 und 4 gebildet wird. Die Flächen 3 und 4 verlaufen zueinander parallel, sind beheizbar und zueinander einstellbar, so daß die Bahn 1 einem definierten Preßdruck ausgesetzt werden kann. Die Flächen 3 und 4 erstrecken sich über einen Längsabschnitt in Bahnlaufrichtung, die mit einem Pfeil angedeutet ist.A device, which is shown as an example in the figures in various schematically illustrated versions, is used to carry out the method according to the invention. The device has a smoothing zone 2, which is formed between two mutually facing surfaces 3 and 4. The surfaces 3 and 4 run parallel to one another, are heatable and adjustable relative to one another, so that the web 1 can be exposed to a defined pressing pressure. The surfaces 3 and 4 extend over a longitudinal section in the web running direction, which is indicated by an arrow.

Nach dem Ausführungsbeispiel gemäß Fig. 1 ist die eine Fläche 3 ein Mantel 5 einer Walze 6. Die zweite Fläche 4 wird mittels eines endlosen, flexiblen Bandes 7 gebildet. Das Band 7 ist in Richtung zu dem Walzenmantel 5 mittels eines anpreßbaren Stützelementes 8 abgestützt. Dieses weist eine zum Band 7 konkave Abstützfläche auf, die zu dem Radius des Walzenmantels 5 komplementär ausgebildet ist. Der Mantel 5 der Walze 6 und das Band 7 sind mit der gleichen Geschwindigkeit antreibbarwie die Laufgeschwindigkeit der Bahn 1. Wenn es technologisch gewünscht ist, können auch Differenzgeschwindigkeiten angewendet werden.1, the one surface 3 is a jacket 5 of a roller 6. The second surface 4 is formed by means of an endless, flexible belt 7. The belt 7 is supported in the direction of the roll shell 5 by means of a pressing-on support element 8. This has a concave to the band 7 Support surface, which is complementary to the radius of the roll shell 5. The jacket 5 of the roller 6 and the belt 7 can be driven at the same speed as the running speed of the web 1. If it is technologically desired, differential speeds can also be used.

Anstelle des Mantels 5 der Walze 6 kann auch ein flexibles Band 19 verwendet werden, das auf bekannte, hier nicht gezeichnete Weise über Rollwalzen geführt ist und in der Glättzone 2 zu einer konvexen Form mittels eines Stützelementes 18 geformt wird. Die konvexe Abstützfläche ist komplementär ausgebildet zu der gegenüberliegend angeordneten konkaven Fläche des Stützelementes 8. Bei Verwendung eines Metallbandes hat dieses den Vorteil einer guten Beheizbarkeit. Eine z.B. Induktionsheizung für das Band 19 ist in Fig. 1 angedeutet und mit 20 bezeichnet. Eine andere einsetzbare Vorrichtung, z.B. zur Beheizung mit Dampf oder Heißluft ist auch in Fig. 1 angedeutet und mit 21 bezeichnet. Dieses käme vorteilhafterweise besonders dann zur Anwendung, wenn es sich um ein Nichtmetall-Band 19 handelte.Instead of the jacket 5 of the roller 6, a flexible belt 19 can also be used, which is guided over roller rollers in a known manner, not shown here, and is formed into a convex shape in the smoothing zone 2 by means of a support element 18. The convex support surface is complementary to the oppositely arranged concave surface of the support element 8. When using a metal strip, this has the advantage of good heatability. A e.g. Induction heating for the band 19 is indicated in Fig. 1 and designated 20. Another applicable device, e.g. for heating with steam or hot air is also indicated in Fig. 1 and designated 21. This would advantageously be used especially when it was a non-metal band 19.

Der anzuwendende Druck in der Glättzone 2 ist durch das Einstellen des Druckes im Druckmedium des Stützelementes 8 bzw. der Stützelemente 8 und 18 erzeugbar. Die Oberflächentemperatur der Glättfläche ist mittels der Vorrichtungen 20 bzw. 21 einstellbar. Die Feuchtigkeit ist gegeben durch die Feuchte der zu behandelnden Bahn 1. Die flexiblen Bänder sind dicht, d.h. undurchlässig, und zwischen dem Band und der Abstützfläche des Stützelements ist eine Flüssigkeitsschicht vorgesehen, die auf hydrostatische und/oder hydrodynamische Weise aufgebaut wird. Sie sorgt für reibungsarmen Lauf des Bandes entlang der Abstützflächen. Die Flüssigkeit könnte zum Beheizen wie auch zum Kühlen temperiert werden. Die Stützelemente können an sich bekannte Gleitschuhe sein, wobei eine Flüssigkeit zwischen die Abstützfläche und das Band eingeführt wurde. Die Stützelemente können auch an sich bekannte hydrostatische Stützelemente sein. Ihre Drucktaschen könnten ebenso mit einer heizenden oder kühlenden Flüssigkeit gespeist werden. Mit diesen Stützelementen kann also sowohl der Druck, wie auch die Temperatur in der Glättzone 2 nach Bedarf, wenn gewünscht, auch abgestuft, eingestellt werden.Wenn z.B. ein Glättspalt nicht ausreichen sollte oder pro Spalt nur eine Fläche beheizbar ausgeführt ist, ist es von Vorteil, 2 Glättzonen hintereinander anzuordnen, etwa wie es in Fig. 1 gezeigt ist. Wird in einer Glättzone jeweils nur eine Fläche bezeiht, dann ist es zweckmäßig, die gegenüberliegenden zu heizen, so daß die beiden Seiten der Bahn nacheinander an je einer Fläche geglättet werden.The pressure to be applied in the smoothing zone 2 can be generated by adjusting the pressure in the pressure medium of the support element 8 or the support elements 8 and 18. The surface temperature of the smoothing surface can be adjusted by means of the devices 20 and 21. The moisture is given by the moisture of the web 1 to be treated. The flexible bands are tight, i.e. impermeable, and between the band and the support surface of the support element a liquid layer is provided, which is built up in a hydrostatic and / or hydrodynamic manner. It ensures that the belt runs smoothly along the support surfaces. The liquid could be tempered for heating as well as for cooling. The support elements can be sliding shoes known per se, with a liquid being introduced between the support surface and the band. The support elements can also be hydrostatic support elements known per se. Your pressure bags could also be fed with a heating or cooling liquid. With these support elements, both the pressure and the temperature in the smoothing zone 2 can be adjusted as required, if desired, in a graduated manner. if a smoothing gap is not sufficient or if only one surface per gap is designed to be heatable, it is advantageous to arrange two smoothing zones one behind the other, as shown in FIG. 1. If only one surface is used in a smoothing zone, it is advisable to heat the opposite surface so that the two sides of the web are smoothed one after the other on one surface.

Eine weitere Ausführungsform sieht endlose, flexible Bänder 7 vor, die die beiden Flächen 3 und 4 bilden. Die Bänder sind durch zueinander einstellbare Stützelemente 9, siehe Fig. 2 und 4, abgestützt, die jeweils eine ebene dem Band 7 zugewandte Abstützfläche aufweisen. Sie sind zueinander auf bekannte Weise definiert anpreßbar. Obzwar hier hydrostatische Stützelemente gezeichnet sind, sind auch Gleitschuhe von bekannter Art anwendbar. Zwischen jedem Band 7 und der ebenen Abstützfläche des Stützelementes 9 ist eine Flüssigkeitsschicht vorgesehen, welche im Beispiel gemäß Fig. 2 hydrostatisch aufgebaut wird. Dazu weist das Stützelement zum Band 7 geöffnete Drucktaschen 23 auf, die mit einem Druckmedium beaufschlagbar sind, gegebenenfalls zum Beheizen oder Kühlen temperiert. Es ist auch möglich, die Flüssigkeitsschicht auf hydrodynamische Weise aufzubauen, wie das z.B. in Fig. 3 an der Fläche 3 der Fall sein könnte.Another embodiment provides endless, flexible belts 7, which form the two surfaces 3 and 4. The bands are supported by mutually adjustable support elements 9, see FIGS. 2 and 4, each of which has a flat support surface facing the band 7. They can be pressed against one another in a known manner in a defined manner. Although hydrostatic support elements are shown here, sliding blocks of a known type can also be used. A liquid layer is provided between each belt 7 and the flat support surface of the support element 9, which is built up hydrostatically in the example according to FIG. 2. For this purpose, the support element has pressure pockets 23 which are open to the band 7 and can be acted upon by a pressure medium, optionally tempered for heating or cooling. It is also possible to build up the liquid layer in a hydrodynamic manner, e.g. 3 could be the case on surface 3 in FIG.

In der Vorrichtung gemäß Fig. 3 wird die eine Fläche 3 mittels eines dichten, undurchlässigen Bandes 7 gebildet. Die zweite Fläche 4 wird durch eine der Bahn 1 anliegende Wand 12 gebildet, die einen Druckraum eines kastenförmigen, gegen die Bahn 1 einstellbaren Stützelements 13 begrenzt. Die Wand 12 ist ausgeführt zum Durchlassen eines gasförmigen Mediums, welches unter Druck durch eine Leitung 22 in den Druckraum unter der Wand einführbar ist. Das Stützelement ist in einem Träger 24 kolbenartig eingebettet, wobei ein Druckraum 25 vorgesehen ist, der mit einem Druckmedium beaufschlagbar ist zum Anpressen des Stützelementes in Richtung zu der Bahn 1. Zwischen der Wand 12 und der Bahn 1 bildet sich eine Gasschicht, die durch das gas- bzw. dampfförmige Medium aufgebaut wird. Eine weitere Abwandlung ist denkbar, bei der der Druckraum 25 ebenfalls mit einem gas- bzw. dampfförmigen Medium versorgt wird, das von dort durch eine oder mehrere Bohrungen 22' zu dem Druckraum unter der Wand 12 gelangen kann (Fig. 7).In the device according to FIG. 3, one surface 3 is formed by means of a dense, impermeable band 7. The second surface 4 is formed by a wall 12 adjacent to the web 1, which delimits a pressure chamber of a box-shaped support element 13 that can be adjusted against the web 1. The wall 12 is designed for the passage of a gaseous medium which can be introduced under pressure through a line 22 into the pressure space under the wall. The support element is piston-like embedded in a support 24, a pressure chamber 25 being provided which can be pressurized with a pressure medium for pressing the support element in the direction of the web 1. Between the wall 12 and the web 1, a gas layer is formed, which through the gaseous or vaporous medium is built up. A further modification is conceivable in which the pressure chamber 25 is also supplied with a gaseous or vaporous medium, which from there can reach the pressure chamber under the wall 12 through one or more bores 22 '(FIG. 7).

Bei dem Verfahren könnte auch das Bürsten der Oberfläche der Bahn erwünscht sein. Dieses könnte mittels einer Bürstenwalze 15, Fig. 5, erfolgen, welche z.B. anstatt der Walze 6, die in Fig. 1 gezeigt ist, einsetzbar wäre. Wird diese Bürstenwalze quer zur Papierlaufrichtung geteilt und die Teile mit unterschiedlicher Geschwindigkeit angetrieben, ist dadurch vorteilhaft eine Beeinflussung des Glanz-/Glätte-Querprofils möglich. Eine andere vorteilhafte Ausführung bietet sich an durch Anwendung eines Rahmens, der mit Bürstenrollen 26 bestückt ist und mindestens eine der Flächen 3 oder 4 bildet. Dieser Rahmen ist Teil eines kastenförmigen, gegen eine Bahn anpreßbaren Stützelementes 27, in welchem er einen Druckraum begrenzt, der mit einem gasförmigen Medium, z.B. mit Dampf, beaufschlagbar ist. Das Medium dringt beim Betrieb durch den Rahmen zu der anliegenden Oberfläche der Bahn 1. Die Bürsten können mit einer von der Bahngeschwindigkeit abweichenden Geschwindigkeit angetrieben sein. Werden quer zur Bahnlaufrichtung angeordnete Bürsten verwendet, die kürzer als die Bahnbreite sind, so ist es zur Vermeidung von Streifen günstig, hintereinanderliegende Bürsten seitlich versetzt anzuordnen. Auch hier sind Vorteile durch unterschiedliche Geschwindigkeit der Rollen denkbar.Brushing the surface of the web may also be desirable in the method. This could be done by means of a brush roller 15, FIG. 5, which could be used instead of the roller 6 shown in FIG. 1, for example. If this brush roller is divided transversely to the paper running direction and the parts are driven at different speeds, this can advantageously influence the gloss / smooth cross profile. Another advantageous embodiment offers itself by using a frame which is equipped with brush rollers 26 and forms at least one of the surfaces 3 or 4. This frame is part of a box-shaped support element 27 which can be pressed against a web and in which it delimits a pressure space which can be acted upon by a gaseous medium, for example steam. During operation, the medium penetrates through the frame to the adjacent surface of the web 1. The brushes can be driven at a speed which differs from the web speed. If brushes which are arranged transversely to the direction of web travel and are shorter than the web width are used, it is expedient to arrange brushes lying behind one another laterally offset in order to avoid stripes. Here, too, there are advantages due to different speeds of the Rol len conceivable.

Von papiertechnologischem Nutzen könnte auch ein dem vorher beschriebenen ähnliches Stützelement sein, dessen Rahmen mit glatten Walzen kleineren Durchmessers bestückt ist.A support element similar to the one described above, the frame of which is equipped with smooth rollers of smaller diameter, could also be of use in paper technology.

Eine längere Glättzone 2 kann auch mittels mindestens zwei hintereinander in Bahnlaufrichtung angeordneter Reihen von Stützelementen 9 gebildet werden, von welchen die Bänder 7 abgestützt sind, wie dies in Fig. 4 besonders anschaulich gezeigt ist.A longer smoothing zone 2 can also be formed by means of at least two rows of support elements 9 arranged one behind the other in the web running direction, by means of which the belts 7 are supported, as is particularly clearly shown in FIG. 4.

Obzwar bei erfindungsgemäßem Einsatz eines relativ niedrigen Druckes in der Glättzone die Gefahr von überpreßten Stellen in der Bahn 1 weitgehend eliminiert ist, könnte es in einigen Fällen von Vorteil sein, das eingesetzte elastische Band aus weichem Material herstellen oder mit einem weicheren elastischen Material zu beschichten, um ein zusätzliches Potential zur Vermeidung der lokalen Überpressungen in der Bahn zu schaffen.Although the risk of overpressed points in the web 1 is largely eliminated when a relatively low pressure in the smoothing zone is used according to the invention, it could be advantageous in some cases to produce the elastic band used from soft material or to coat it with a softer elastic material, to create additional potential to avoid local overpressures in the train.

Claims (12)

1. Method for smoothing a web (1) of paper or card in a smoothing zone (2) during a period of the smoothing operation which is predetermined by the dwell time of the web in the smoothing zone, in which one operates in the smoothing zone with pressure using temperature and moisture and in which the desired smoothness is achieved for an appropriately long dwell time of the material to be smoothed in a correspondingly long smoothing zone, characterised in that a web (1) which is still moist is guided between parallel, heatable surfaces (3, 4) which can each be pressed against the web and which are arranged on either side of the web and face towards the web, which surfaces are designed to form and hold a predetermined, defined contour of the smoothing zone (2) across the entire length thereof.
2. Method according to Claim 1, characterised by the formation of one surface (3) by means of the shell (5) of a roller (6) and of the second surface (4) by means of an endless flexible belt (7) which is supported in the direction of the roller shell (5) by means of a supporting element (8) provided with a concave supporting surface which is designed to be complementary to the radius of the roller shell (5), the shell (5) of the roller (6) and the flexible belt (7) being able to be driven at a speed identical to the speed of travel of the web.
3. Method according to Claim 1, characterised by the formation of the two surfaces (3, 4) by means of endless flexible belts (7) which are supported by adjustable supporting elements (9) which each have a flat surface (10) facing the belt.
4. Method according to Claims 2 or 3, characterised by the use of an impermeable endless flexible belt (7) and by the formation of a liquid layer (11) between the belt (7) and the surface (10) of the supporting element (9) which faces the belt (7), which liquid layer is built up hydrodynamically and/or hydrostatically.
5. Method according to Claim 1, characterised in that one surface (3) is impermeable and that the second surface (4) is formed by a wall (12) which defines a pressure chamber of a supporting element (9) in the direction of the web (1) and is suitable for allowing a gaseous medium to pass through from the pressure chamber.
6. Method according to one of the preceding Claims, characterised by the use of supporting elements which are arranged in at least two successive rows in the direction of travel of the web.
7. Method according to Claim 1, characterised by the use of a brush roll (15, Fig. 5) as one of the surfaces (3 or 4), the brush roll being able to be driven at a different speed to the speed of the web.
8. Method according to Claim 1, characterised in that the brush roll is divided transversely to its axis, the sections being able to be driven at different speeds.
9. Method according to Claim 1, characterised by the use of a frame with brush rolls arranged therein (Fig. 6) to form at least one of the surfaces (3 or 4).
10. Method according to Claim 8, characterised in that the axes of the brushes are arranged transversely to the direction of travel of the web and at least one of the brush rolls is able to be driven at a different speed to the speed of the web.
11. Method according to Claim 8, characterised in that the brush rolls are arranged transversely to the direction of travel of the web and their length corresponds to only part of the width of the web and that the brushes which succeed one another in the direction of travel are offset.
12. Method according to Claim 8, 9 or 10, characterised in that a gaseous heat-transfer medium can emerge between the brush rolls in the direction of the web.
EP89116409A 1988-10-31 1989-09-06 Process for smoothing a paper or cardboard web Expired - Lifetime EP0370185B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89116409T ATE76134T1 (en) 1988-10-31 1989-09-06 METHOD OF FADERING A WEB OF PAPER OR CARDBOARD.

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH4045/88 1988-10-31
CH404588 1988-10-31
CH404588 1988-10-31

Publications (3)

Publication Number Publication Date
EP0370185A1 EP0370185A1 (en) 1990-05-30
EP0370185B1 true EP0370185B1 (en) 1992-05-13
EP0370185B2 EP0370185B2 (en) 2000-01-19

Family

ID=4268786

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89116409A Expired - Lifetime EP0370185B2 (en) 1988-10-31 1989-09-06 Process for smoothing a paper or cardboard web

Country Status (4)

Country Link
US (1) US5163364A (en)
EP (1) EP0370185B2 (en)
AT (1) ATE76134T1 (en)
DE (1) DE3920204A1 (en)

Families Citing this family (55)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4011394C1 (en) * 1990-04-09 1991-11-28 Sulzer-Escher Wyss Gmbh, 7980 Ravensburg, De
US5400707A (en) * 1992-10-09 1995-03-28 Champion International Corporation Apparatus for finishing a continuous sheet of paper
US6007921A (en) * 1992-10-09 1999-12-28 Champion International Corporation Continuous finishing belt capable of finishing surface of a web of paper
FI95061C (en) * 1993-03-08 1995-12-11 Valmet Paper Machinery Inc Method of calendering paper web and calender for application of the method
DE4322876A1 (en) * 1993-07-09 1993-11-18 Voith Gmbh J M Web polishing unit - has a sliding shoe divided into sections along web travel for precise control without deviation
DE4410129A1 (en) * 1994-03-24 1995-09-28 Kleinewefers Gmbh Press device for sheet material
SE502960C2 (en) * 1994-06-15 1996-02-26 Nordiskafilt Ab Albany Arrangement for calendaring
SE503543C2 (en) * 1994-09-14 1996-07-01 Kvaerner Hymac As Method and apparatus for concentrating a fiber suspension
US5637195A (en) * 1995-03-23 1997-06-10 Westvaco Corporation Method to reduce off-taste and/or odor from hygienic paper packages
FI104434B (en) * 1996-02-28 2000-01-31 Valmet Corp Drying batches with medium calibration for the paper machine
US5913587A (en) * 1996-02-28 1999-06-22 Valmet Corporation Dryer sections with intermediate calendering in a paper machine
US6065222A (en) * 1996-02-28 2000-05-23 Valmet Corporation Dryer sections with intermediate calendering in a paper machine
DE19613878C1 (en) * 1996-04-06 1997-06-12 Voith Sulzer Finishing Gmbh Calender for paper, having two treatment points
DE19636627A1 (en) * 1996-09-10 1998-03-12 Voith Sulzer Papiermasch Gmbh Smoothing device and method for smoothing a paper web
FI102304B1 (en) 1997-04-02 1998-11-13 Valmet Corp Calendaring process and calendar for application of the process
FI102305B (en) 1997-04-02 1998-11-13 Valmet Corp Calendaring process and calendar for application of the process
US6203307B1 (en) * 1997-08-28 2001-03-20 Champion International Corporation System for finishing surface of a web of paper having an improved continuous finishing belt
US6036909A (en) * 1997-11-25 2000-03-14 Kimberly-Clark Worldwide, Inc. Method for embossing web material using an extended nip
US5938895A (en) * 1998-04-02 1999-08-17 Valmet Corporation Calender having moisture profile control
DE19828156A1 (en) 1998-06-24 1999-12-30 Voith Sulzer Papiertech Patent Device for smoothing a web of material
FI104745B (en) * 1998-06-25 2000-03-31 Valmet Corp Method and apparatus for calendering paper and cardboard
US6287424B1 (en) 1998-09-22 2001-09-11 International Paper Company Method for finishing paperboard to achieve improved smoothness
US6190500B1 (en) 1998-10-02 2001-02-20 International Paper Company Multilayer linerboard having improved printing properties and related method of manufacture
US6332953B1 (en) 1998-10-02 2001-12-25 International Paper Company Paper product having enhanced printing properties and related method of manufacture
SE9804347D0 (en) 1998-12-16 1998-12-16 Valmet Corp Method and apparatus for calendering paper
SE9804346D0 (en) * 1998-12-16 1998-12-16 Valmet Corp Method and apparatus for calendering paper
US6183601B1 (en) 1999-02-03 2001-02-06 Kimberly-Clark Worldwide, Inc. Method of calendering a sheet material web carried by a fabric
DE19903581A1 (en) * 1999-01-29 2000-08-03 Voith Sulzer Papiertech Patent Paper web drying and polishing stations moistens the web surface by pressure forces at the end of or after the drying station before it passes through the roller press gaps of the calender to set the web moisture content
FI112681B (en) 1999-08-24 2003-12-31 Metso Paper Inc Method and arrangement for surface treatment of a paper and / or cardboard web
FI20000671A0 (en) * 2000-03-22 2000-03-22 Valmet Corp Multi-type calendars and calendaring arrangements
FI115730B (en) * 2000-05-03 2005-06-30 Metso Paper Inc Band calender and method for calendering a web of material in a band calender
FI115543B (en) * 2000-06-20 2005-05-31 Metso Paper Inc Procedure for preliminary calendering, post-processing and apparatus for carrying out the processes
FI115062B (en) * 2000-07-10 2005-02-28 Metso Paper Inc A method for calendering tissue paper
WO2002038858A2 (en) * 2000-11-09 2002-05-16 Metso Paper, Inc. A method and a paper machine line for the manufacture of coated fine paper
FI20011291A (en) * 2001-06-18 2002-12-19 Metso Paper Inc Process and paper machine for making coated paper
DE10157687B4 (en) * 2001-11-24 2005-11-17 Voith Paper Patent Gmbh Calender and method for smoothing a paper or board web
DE10157690C1 (en) * 2001-11-24 2003-02-20 Voith Paper Patent Gmbh Calender assembly with a wide nip, to polish the surfaces of paper/cardboard webs, has a steam jet aligned at the web on leaving the nip to increased the polished surface effects
DE10157689C1 (en) * 2001-11-24 2003-02-13 Voith Paper Patent Gmbh Assembly to polish a paper/cardboard web applies a liquid to the web, in front of the wide nip between a roller and mantle, which evaporates within the heated nip to give an effective polish and retain the web moisture content
DE10157723B4 (en) * 2001-11-24 2005-12-22 Voith Paper Patent Gmbh Apparatus and method for smoothing a paper or board web
DE10157692A1 (en) * 2001-11-24 2003-06-12 Voith Paper Patent Gmbh Method and calender for smoothing a fibrous web
DE10204285C1 (en) * 2002-02-02 2003-06-18 Voith Paper Patent Gmbh For increased paper web strength, web surface is sprayed with glue, and web passes directly through wide nip between hard roller and rotating mantle
DE10206027C2 (en) * 2002-02-14 2003-12-11 Voith Paper Patent Gmbh Calender and method for smoothing a fibrous web
DE10206333C1 (en) * 2002-02-14 2003-07-31 Voith Paper Patent Gmbh Wide nip calender arrangement and method for satinizing a paper or Karrton web
EP1365068B1 (en) * 2002-05-10 2008-05-07 The Procter & Gamble Company Embossed tissue having loosened surface fibers and method for its production
US6946186B2 (en) * 2002-08-24 2005-09-20 International Paper Co. Uncoated facestock for adhesive-backed labels
US20040099391A1 (en) * 2002-11-26 2004-05-27 Bob Ching Process for producing super high bulk, light weight coated papers
DE10357010A1 (en) * 2003-12-05 2005-06-30 Voith Paper Patent Gmbh Arrangement for smoothing a fibrous web
DE102004029261B4 (en) * 2004-06-17 2006-05-18 Papierfabrik August Koehler Ag A process for producing a thermosensitive recording material and a recording material prepared by the process
FI121084B (en) * 2004-12-01 2010-06-30 Metso Paper Inc Method and arrangement for treating a fiber web
DE102007012521A1 (en) 2007-03-15 2008-09-18 Voith Patent Gmbh Roller for machines for producing or treatment of material webs, particularly paper or cardboard, has carrier and flexible casing arranged coaxially outside, where annular space is arranged in circular condition
DE102007028986A1 (en) 2007-06-23 2008-12-24 Voith Patent Gmbh Method for production of thin-walled endless belt for devices for processing flat material layer, involves forming endless belt smoothly on surface by laying material layer with material laying unit
DE102007039390A1 (en) 2007-08-21 2009-02-26 Voith Patent Gmbh Band calender for polishing super calender paper, has drive motor of guide roll and drive motor of impression roller consisting of controller, which has non-constant torque of drive motor during glazing
DE102008001023A1 (en) * 2008-04-07 2009-10-08 Voith Patent Gmbh Method and device for treating a fibrous web
DE102008024082A1 (en) 2008-05-17 2009-11-19 Andritz Küsters Gmbh calender
DE102010030327A1 (en) 2010-06-22 2011-12-22 Voith Patent Gmbh Web treatment device for smoothing fibrous web, particularly paper or cardboard web, has contact zone formed by treatment element and flexible sheath, where sheath is formed in concave manner in contact zone between longitudinal sealings

Family Cites Families (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1086097A (en) * 1911-01-12 1914-02-03 George W Swift Jr Machine for facing corrugated paper.
US1862656A (en) * 1930-05-27 1932-06-14 Warren S D Co Manufacture of transparent paper
DE923172C (en) * 1950-05-10 1955-07-25 Peter Voelskow Device for continuous pressing
AT216541B (en) * 1958-11-05 1961-08-10 Rupert Kraft Device for treating flat materials
GB887737A (en) * 1959-02-26 1962-01-24 Technical Waxes Ltd Improvements relating to apparatus and methods for glaze coating paper and the like
US3286360A (en) * 1963-10-16 1966-11-22 Beloit Corp Divided temperature controlled press
US3413915A (en) * 1965-06-10 1968-12-03 Du Pont Magnetically biased pressure application to running length materials
US3354035A (en) * 1966-11-08 1967-11-21 Albemarle Paper Co Continuous process of drying uncoated fibrous webs
US3563166A (en) * 1967-08-07 1971-02-16 Strojosvit Np Rotary press
US3604344A (en) * 1968-09-23 1971-09-14 Preben Einar Roar Orstam Method of smoothing surfaces of blanks of fiber mass and a smoothing machine to carry the method into effect
DE1953816A1 (en) * 1969-10-25 1971-07-01 Hwm Weh Maschf Hermann Process and device for the production of single and multi-layer chipboard and for their coating
DE2130641C3 (en) * 1971-06-21 1975-03-13 Sandco Ltd., Ottawa Double belt press
US3783097A (en) * 1972-05-30 1974-01-01 Beloit Corp Hydrodynamically loaded web press with slipper bearing shoes
DE2311909C3 (en) * 1973-03-09 1979-06-28 Kuesters, Eduard, 4150 Krefeld Device for the continuous pressure treatment of webs
DE2627272C3 (en) * 1976-06-18 1978-11-30 Kleinewefers Industrie-Companie Gmbh, 4150 Krefeld Brushing machine for the surface finishing of paper and cardboard webs
US4201624A (en) * 1978-09-05 1980-05-06 Beloit Corporation Extended nip press
US4428797A (en) * 1981-05-26 1984-01-31 Beloit Corporation Extended nip shoe for a nip in a papermaking machine
DE3126492C2 (en) * 1981-06-30 1983-10-20 Escher Wyss AG, Zürich Press roll
FI821139L (en) * 1982-04-01 1983-10-02 Tampella Oy Ab LAONGZONSPRESS FOER EN PAPPERSMASKIN
GB8328354D0 (en) * 1983-10-24 1983-11-23 Black Clawson Int Surface treatment of paper and paperboard
US4704191A (en) * 1985-01-08 1987-11-03 Beloit Corp. Electromagnetic extended nip press
FI76872C (en) * 1987-02-23 1988-12-12 Valmet Paper Machinery Inc Method and apparatus for controlling zone rollers.
DE3712634A1 (en) * 1987-04-14 1988-11-03 Baehre & Greten CONTINUOUSLY WORKING PRESS
DE3815446A1 (en) * 1988-05-06 1989-11-16 Kuesters Eduard Maschf Method and device for the production of smoothness and gloss on webs of paper and the like

Also Published As

Publication number Publication date
DE3920204C2 (en) 1991-04-11
EP0370185B2 (en) 2000-01-19
DE3920204A1 (en) 1990-05-10
ATE76134T1 (en) 1992-05-15
US5163364A (en) 1992-11-17
EP0370185A1 (en) 1990-05-30

Similar Documents

Publication Publication Date Title
EP0370185B1 (en) Process for smoothing a paper or cardboard web
DE2837913C2 (en) Roller with controllable deflection, in particular for machines for producing and processing webs made of paper or plastic
DE3542342A1 (en) METHOD AND ARRANGEMENT FOR CALENDARING PAPER OR PAPERBOARDS
DE2614168A1 (en) DEVICE AND METHOD AND DIAPER-Bearing SNEAKERS MANUFACTURED THEREOF
DE2243465C3 (en) Continuously working press
EP1081276A2 (en) Drying system
DE2911648A1 (en) SYSTEM FOR COATING AND FINISHING FLAT-SHAPED MATERIAL RAILS AND METHOD FOR COATING AND FINISHING FLAT-SHAPED MATERIAL RAILS
DE102007024581A1 (en) Calender, has two paper or cardboard web handling units with two contact surfaces and current paper or cardboard strip under pressure or temperature impact is processed between contact surfaces of each paper or cardboard web handling unit
EP0967324A2 (en) Process for smoothing a paper web
DE3429695C2 (en)
EP1736321A1 (en) Process for producing a thermosensitive paper
DE19903581A1 (en) Paper web drying and polishing stations moistens the web surface by pressure forces at the end of or after the drying station before it passes through the roller press gaps of the calender to set the web moisture content
EP1369526B1 (en) Calender and method of calendering
DE112010003542T5 (en) Roller with adjustable jacket, device and method
DE19511050A1 (en) Method and device for producing a paper web having a CF layer
EP2295632A1 (en) Calendar
DE1126127B (en) Device for heat treatment of thermoplastic plastic webs
DE10157691B4 (en) Calender and method for smoothing a fibrous web
AT255884B (en) Method and device for producing a one or both sides smoothed paper web od.
DE10157723B4 (en) Apparatus and method for smoothing a paper or board web
DE2814689C3 (en) Ironing machine with rollers arranged in pairs
DE60011217T2 (en) LONG GAP PRESS
DE102016201828B4 (en) Apparatus and method for treating a fibrous web
AT511492B1 (en) Accumulator filling method for a fluid system
DE19548865A1 (en) Heated soft-nip calender for paper, paperboard etc

Legal Events

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

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19890906

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT GB SE

17Q First examination report despatched

Effective date: 19911008

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT GB SE

REF Corresponds to:

Ref document number: 76134

Country of ref document: AT

Date of ref document: 19920515

Kind code of ref document: T

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

26 Opposition filed

Opponent name: EDUARD KUESTERS MASCHINENFABRIK GMBH & CO. KG

Effective date: 19930208

Opponent name: J.M. VOITH GMBH

Effective date: 19930129

EAL Se: european patent in force in sweden

Ref document number: 89116409.7

APAC Appeal dossier modified

Free format text: ORIGINAL CODE: EPIDOS NOAPO

APAC Appeal dossier modified

Free format text: ORIGINAL CODE: EPIDOS NOAPO

APAE Appeal reference modified

Free format text: ORIGINAL CODE: EPIDOS REFNO

APCC Communication from the board of appeal sent

Free format text: ORIGINAL CODE: EPIDOS OBAPO

APCC Communication from the board of appeal sent

Free format text: ORIGINAL CODE: EPIDOS OBAPO

APCC Communication from the board of appeal sent

Free format text: ORIGINAL CODE: EPIDOS OBAPO

APAC Appeal dossier modified

Free format text: ORIGINAL CODE: EPIDOS NOAPO

PLAW Interlocutory decision in opposition

Free format text: ORIGINAL CODE: EPIDOS IDOP

PUAH Patent maintained in amended form

Free format text: ORIGINAL CODE: 0009272

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT MAINTAINED AS AMENDED

27A Patent maintained in amended form

Effective date: 20000119

AK Designated contracting states

Kind code of ref document: B2

Designated state(s): AT GB SE

GBTA Gb: translation of amended ep patent filed (gb section 77(6)(b)/1977)

Effective date: 20000202

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20030818

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20030919

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20030922

Year of fee payment: 15

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040906

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040906

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040907

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20040906

EUG Se: european patent has lapsed
APAH Appeal reference modified

Free format text: ORIGINAL CODE: EPIDOSCREFNO