EP0648893B1 - Process and apparatus for finishing a paper web - Google Patents

Process and apparatus for finishing a paper web Download PDF

Info

Publication number
EP0648893B1
EP0648893B1 EP94112691A EP94112691A EP0648893B1 EP 0648893 B1 EP0648893 B1 EP 0648893B1 EP 94112691 A EP94112691 A EP 94112691A EP 94112691 A EP94112691 A EP 94112691A EP 0648893 B1 EP0648893 B1 EP 0648893B1
Authority
EP
European Patent Office
Prior art keywords
drying
nip
paper web
web
nips
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
EP94112691A
Other languages
German (de)
French (fr)
Other versions
EP0648893A1 (en
Inventor
Reinhard Leigraf
Hans-Rolf Conrad
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 Sulzer Finishing GmbH
Original Assignee
Voith Sulzer Finishing 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 Sulzer Finishing GmbH filed Critical Voith Sulzer Finishing GmbH
Publication of EP0648893A1 publication Critical patent/EP0648893A1/en
Application granted granted Critical
Publication of EP0648893B1 publication Critical patent/EP0648893B1/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
    • D21G1/0073—Accessories for calenders
    • D21G1/0093—Web conditioning devices
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus

Definitions

  • the invention relates to a method for finishing a paper web according to the preamble of claim 1 and an apparatus for carrying out the method according to the preamble of claim 7.
  • the invention has for its object to further increase the achievable smoothness of the paper web or to reduce the compression.
  • drying does not take place as post-drying, but rather as intermediate drying, eliminates the disadvantages associated with drying, namely re-erection of the paper fibers, i.e. a reduction in the gloss and smoothness of the paper, by at least one more pressing in the nip.
  • the improvement in smoothness in the subsequent nip is less than in the case of higher moisture.
  • the paper has a higher overall smoothness.
  • a desired property profile can also be obtained across the web width. Deviations from such a target profile are compensated for by appropriate control of the individual drying zones.
  • the control or regulation can take place not only depending on the moisture, but also depending on the gloss or smoothness, because these properties depend on the moisture in the downstream nip.
  • the suction device ensures that the steam produced during drying does not subsequently precipitate as condensate on the paper web and thus prevents the desired properties from occurring.
  • the embodiment according to claim 12 has the advantage that the highest line pressure prevails in the lowest nip and therefore the reduction in moisture due to the upstream drying device results in only a slight loss of smoothness.
  • the embodiment according to claim 13 leads to the paper web remaining in the free atmosphere for a predetermined time after drying, so that the heated paper web can be further evaporated before the last nip is reached.
  • a paper web 1 to be finished is removed from an unwinding roll 2, passed through a satin calender 3 and a drying device 4 and taken up by a winding roll 5.
  • the satin calender 3 has a stack of hard rollers 6, for example made of steel, and of soft rollers 7, which are provided with a cover, for example of asbestos substitutes. Gaps 8 are formed between the rollers, through which the paper web 1 is guided with the aid of guide rollers 9.
  • the paper web 1 emerges approximately horizontally from the second lowest nip 8a and passes through the drying device 4 with a horizontal section 1a. After deflection, a second horizontal section 1b of the paper web 1 leads to the lowest roller gap 8b.
  • the finished paper web 1 passes through a measuring station 10, which measures a web property, such as moisture, gloss and / or smoothness, with a sensor 11, which can be moved back and forth across the width of the paper web 1, and sends it to an actual value input 12 Controller 13 conducts.
  • a web property such as moisture, gloss and / or smoothness
  • Controller 13 conducts.
  • the property profile desired across the web width is entered via a setpoint input 14.
  • Corresponding control signals for the drying device 4 are emitted at the output 15.
  • the drying device has a plurality of drying elements 16 arranged next to one another, the drying performance of which can be controlled independently of one another. You can therefore dry some web sections more than others and therefore change the moisture profile or the gloss and smoothness values that depend on it.
  • the drying device 4 has a suction device 17 in order to remove the steam formed during drying. Drying can be carried out by blowing with hot air, by infrared radiation heating, by heat conduction by means of heated cylinders or in another known manner.
  • a further improvement results if at least some of the hard rollers 6 are heated and / or if the cover of the soft rollers 7 heats up due to the constant elastic deformation, that is to say the paper web 1 apart from the high one Humidity also assumes a higher temperature.
  • the drying device 4 lowers the high humidity to approximately the desired final value, for example to 5%, although the fibers on the surface partially straighten up. For this reason, pressure treatment is carried out again in the lowest nip 8b. This happens when the humidity is reduced, which is enough to produce the desired high smoothness.
  • the paper can also be treated in several successive compact calenders, with the drying device again being arranged at the end of the treatment section, but in any case before the last nip.

Landscapes

  • Paper (AREA)
  • Replacement Of Web Rolls (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

A process for finishing a paper web (1) provides that the web is subjected to a pressure treatment in at least one roll nip (8) and subsequently to a drying, whereupon there follows at least one further pressure treatment in a roll nip (8b). A device for carrying out this process has at least two roll nips (8), formed by means of rolls (6, 7), and a drying device (4). The latter is arranged in the run of the paper web (1) between two roll nips (8a, 8b). In this way, the smoothness of the paper can be improved or a paper of low compression can be achieved. <IMAGE>

Description

Die Erfindung bezieht sich auf ein Verfahren zum Veredeln einer Papierbahn nach dem Oberbegriff des Anspruchs 1 und eine Vorrichtung zur Durchführung des Verfahrens nach dem Oberbegriff des Anspruchs 7.The invention relates to a method for finishing a paper web according to the preamble of claim 1 and an apparatus for carrying out the method according to the preamble of claim 7.

Aus DE-PS 34 27 967 ist es bekannt, eine Papierbahn mit hoher Einlauffeuchte durch die Walzenspalte eines Verdichtungskalanders, Satinierkalanders oder Glättwerks laufen zu lassen und die dann ebenfalls zu hohe Austrittsfeuchte durch eine nachgeschaltete Trocknungsvorrichtung auf den gewünschten Endwert herabzusetzen. Die hohe Feuchte in Verbindung mit dem im Walzenspalt auftretenden Liniendruck führt zu hochverdichteten Papieren, wie z.B. Silicon-Rohpapier oder Pergaminpapier, mit sehr guten Eigenschaften bezüglich Raumgewicht, Porosität, Transparenz und Glätte. Obwohl die Glätte durch die Nachtrocknung verringert wird, sei sie immer noch besser als bei der üblichen Behandlung für Naturpapier, bei dem die Trocknung allein durch die Temperatur der Kalanderwalzen bewirkt wird. Anstelle einer Erhöhung der Glätte kann auch der Liniendruck reduziert und daher eine geringere Verdichtung erreicht werden.From DE-PS 34 27 967 it is known to let a paper web with high inlet moisture run through the nips of a compression calender, calendering calender or smoothing unit and then also reduce the excessively high outlet moisture to the desired final value by means of a downstream drying device. The high humidity in connection with the line pressure occurring in the nip leads to highly compressed papers, such as silicone base paper or glassine paper, with very good properties in terms of density, porosity, transparency and smoothness. Although the smoothness is reduced by the post-drying, it is still better than with the usual treatment for natural paper, in which the drying is effected solely by the temperature of the calender rollers. Instead of increasing the smoothness, the line pressure can also be reduced and therefore less compression can be achieved.

Der Erfindung liegt die Aufgabe zugrunde, die erzielbare Glätte der Papierbahn noch weiter zu erhöhen bzw. die Verdichtung zu verringern.The invention has for its object to further increase the achievable smoothness of the paper web or to reduce the compression.

Diese Aufgabe wird verfahrensmäßig durch die Merkmale des Anspruchs 1 und vorrichtungsmäßig durch die Merkmale des Anspruchs 7 gelöst.This object is achieved in terms of the method by the features of claim 1 and in terms of the device by the features of claim 7.

Dadurch, daß die Trocknung nicht als Nachtrocknung, sondern als Zwischentrocknung erfolgt, werden die mit der Trocknung verbundenen Nachteile, nämlich eine Wiederaufrichtung der Papierfasern, also eine Verringerung des Glanzes und der Glätte des Papiers, durch mindestens ein nochmaliges Pressen im Walzenspalt beseitigt. Hierbei ist zwar die Glätteverbesserung im nachfolgenden Walzenspalt geringer als bei höherer Feuchtigkeit. Im Endeffekt hat aber das Papier insgesamt eine höhere Glätte.The fact that the drying does not take place as post-drying, but rather as intermediate drying, eliminates the disadvantages associated with drying, namely re-erection of the paper fibers, i.e. a reduction in the gloss and smoothness of the paper, by at least one more pressing in the nip. Here, the improvement in smoothness in the subsequent nip is less than in the case of higher moisture. Ultimately, however, the paper has a higher overall smoothness.

Umgekehrt kann man durch Verringerung des Liniendrucks ein Papier mit geringerer Verdichtung erzielen, dessen Glätte den bisher üblichen Werten entspricht. Ein weiterer Vorteil der Zwischentrocknung liegt darin, daß man eine sehr starke Reduzierung der Feuchte vornehmen kann, bei der ein entsprechend starkes Wiederaufrichten der Papierfasern zu beobachten ist. Denn diese Fasern werden anschließend wieder eingeebnet. Man kann somit in den vorgeschalteten Walzenspalten mit sehr hoher Feuchte arbeiten, ohne daß die Walzen selbst auf hoher Temperatur gehalten werden müßten. Dies macht es möglich, bei elastischen Walzen, statt sie mit einem inzwischen nicht mehr zugelassenen Asbestbezug zu versehen, weniger temperaturbeständige Bezüge aus Asbestersatzstoffen zu verwenden.Conversely, by reducing the line pressure, paper with less compression can be obtained, the smoothness of which corresponds to the values usual up to now. Another advantage of the intermediate drying is that a very strong reduction in moisture can be carried out, in which a correspondingly strong straightening of the paper fibers can be observed. Because these fibers are then leveled again. It is therefore possible to work in the upstream nips with very high moisture without the rollers themselves having to be kept at a high temperature. This makes it possible for elastic rollers, instead of providing them with an asbestos cover that is no longer approved, use less temperature-resistant covers made from asbestos substitutes.

All diese Vorteile gelten in besonderem Maße, wenn gemäß den Ansprüchen 2 und 8 der Trockenvorrichtung nur noch ein Walzenspalt nachgeschaltet ist. Dieser eine Spalt reicht in aller Regel aus, um die beim Trocknen wieder aufgerichteten Fasern einzuebnen. Die infolge der geringeren Feuchte hinzunehmende Verringerung der Glätteverbesserung nimmt den kleinstmöglichen Wert an.All of these advantages apply in particular if, according to claims 2 and 8, the drying device is only followed by a nip. This one gap is usually sufficient to level the fibers that have been erected again during drying. The reduction in the improvement in smoothness due to the lower humidity takes on the smallest possible value.

Die Maßnahmen der Ansprüche 3 und 9 erlauben eine Änderung der Trocknungsleistung quer über die Papierbahn und daher eine unterschiedliche Reduzierung der Feuchte quer über die Papierbahn.The measures of claims 3 and 9 allow a change in the drying performance across the paper web and therefore a different reduction in moisture across the paper web.

Mit Hilfe der Messungen gemäß den Ansprüchen 4 und 10 läßt sich darüber hinaus ein gewünschtes Eigenschafts-Profil quer über die Bahnbreite erhalten. Abweichungen von einem solchen Sollprofil werden durch entsprechende Ansteuerung der einzelnen Trocknungszonen ausgeglichen. Die Steuerung oder Regelung kann nicht nur in Abhängigkeit von der Feuchte erfolgen, sondern auch in Abhängigkeit von Glanz oder Glätte, weil diese Eigenschaften von der Feuchte im nachgeschalteten Walzenspalt abhängen.With the help of the measurements according to claims 4 and 10, a desired property profile can also be obtained across the web width. Deviations from such a target profile are compensated for by appropriate control of the individual drying zones. The control or regulation can take place not only depending on the moisture, but also depending on the gloss or smoothness, because these properties depend on the moisture in the downstream nip.

Bei der Weiterbildung nach den Ansprüchen 5 und 11 sorgt die Absaugevorrichtung dafür, daß der beim Trocknen entstehende Dampf sich nicht anschließend als Kondensat auf der Papierbahn niederschlägt und damit verhindert, daß die gewünschten Eigenschaften entstehen.In the development according to claims 5 and 11, the suction device ensures that the steam produced during drying does not subsequently precipitate as condensate on the paper web and thus prevents the desired properties from occurring.

Die in Anspruch 6 erwähnten Trocknungsarten erlauben eine intensive Wärmeübertragung, ohne daß dabei Druck auf die Papierbahn ausgeübt werden müßte.The types of drying mentioned in claim 6 permit intensive heat transfer without pressure having to be exerted on the paper web.

Die Ausführungsform nach Anspruch 12 hat den Vorteil, daß im untersten Walzenspalt der höchste Liniendruck herrscht und daher die Verringerung der Feuchte durch die vorgeschaltete Trocknungsvorrichtung einen nur geringen Glätteverlust mit sich bringt.The embodiment according to claim 12 has the advantage that the highest line pressure prevails in the lowest nip and therefore the reduction in moisture due to the upstream drying device results in only a slight loss of smoothness.

Die Ausgestaltung nach Anspruch 13 führt dazu, daß die Papierbahn nach dem Trocknen eine vorgegebene Zeit in der freien Atmosphäre verbleibt, so daß ein weiteres Ausdampfen der aufgeheizten Papierbahn erfolgen kann, ehe der letzte Walzenspalt erreicht wird.The embodiment according to claim 13 leads to the paper web remaining in the free atmosphere for a predetermined time after drying, so that the heated paper web can be further evaporated before the last nip is reached.

Die Erfindung wird nachstehend anhand eines in der Zeichnung dargestellten Ausführungsbeispiels näher erläutert. Es zeigen:

Fig. 1
eine schematische Darstellung der erfindungsgemäßen Vorrichtung und
Fig. 2
eine schematische Draufsicht auf Meßstation und Trockner.
The invention is explained below with reference to an embodiment shown in the drawing. Show it:
Fig. 1
a schematic representation of the device according to the invention and
Fig. 2
a schematic plan view of the measuring station and dryer.

Eine zu veredelnde Papierbahn 1 wird von einer Abwickelrolle 2 abgenommen, durch einen Satinagekalander 3 und eine Trocknungsvorrichtung 4 hindurchgeleitet sowie von einer Aufwickelrolle 5 aufgenommen. Der Satinagekalander 3 weist einen Stapel aus harten Walzen 6, z.B. aus Stahl, und aus weichen Walzen 7, die mit einem Bezug beispielsweise aus Asbestersatzstoffen, versehen sind, auf. Zwischen den Walzen werden Walzenspalte 8 gebildet, durch welche die Papierbahn 1 mit Hilfe von Leitwalzen 9 geführt wird. Die Papierbahn 1 tritt etwa horizontal aus dem zweituntersten Walzenspalt 8a aus und durchläuft mit einem horizontalen Abschnitt 1a die Trocknungsvorrichtung 4. Nach Umlenkung führt ein zweiter horizontaler Abschnitt 1b der Papierbahn 1 zum untersten Walzenspalt 8b. Die fertigbehandelte Papierbahn 1 durchläuft noch eine Meßstation 10, welche mit einem Sensor 11, der über die Breite der Papierbahn 1 hin und her bewegt werden kann, eine Bahneigenschaft, wie Feuchte, Glanz und/oder Glätte mißt, und sie an einen Istwerteingang 12 eines Reglers 13 leitet. Über einen Sollwerteingang 14 wird das über die Bahnbreite gewünschte Eigenschaftsprofil eingegeben. Am Ausgang 15 werden entsprechende Steuersignale für die Trocknungsvorrichtung 4 abgegeben.A paper web 1 to be finished is removed from an unwinding roll 2, passed through a satin calender 3 and a drying device 4 and taken up by a winding roll 5. The satin calender 3 has a stack of hard rollers 6, for example made of steel, and of soft rollers 7, which are provided with a cover, for example of asbestos substitutes. Gaps 8 are formed between the rollers, through which the paper web 1 is guided with the aid of guide rollers 9. The paper web 1 emerges approximately horizontally from the second lowest nip 8a and passes through the drying device 4 with a horizontal section 1a. After deflection, a second horizontal section 1b of the paper web 1 leads to the lowest roller gap 8b. The finished paper web 1 passes through a measuring station 10, which measures a web property, such as moisture, gloss and / or smoothness, with a sensor 11, which can be moved back and forth across the width of the paper web 1, and sends it to an actual value input 12 Controller 13 conducts. The property profile desired across the web width is entered via a setpoint input 14. Corresponding control signals for the drying device 4 are emitted at the output 15.

Die Trocknungsvorrichtung weist mehrere nebeneinander angeordnete Trocknungselemente 16 auf, deren Trocknungsleistung unabhängig voneinander steuerbar ist. Man kann daher einige Bahnabschnitte stärker trocknen als andere und daher das Feuchteprofil bzw. die davon abhängigen Glanz- und Glättewerte ändern. Außerdem besitzt die Trocknungsvorrichtung 4 eine Absaugvorrichtung 17, um den beim Trocknen entstehenden Dampf abzuführen. Das Trocknen kann durch Beblasen mit heißer Luft, durch eine Infrarot-Strahlungsheizung, durch Wärmeleitung mittels beheizter Zylinder oder auf eine andere bekannte Weise erfolgen.The drying device has a plurality of drying elements 16 arranged next to one another, the drying performance of which can be controlled independently of one another. You can therefore dry some web sections more than others and therefore change the moisture profile or the gloss and smoothness values that depend on it. In addition, the drying device 4 has a suction device 17 in order to remove the steam formed during drying. Drying can be carried out by blowing with hot air, by infrared radiation heating, by heat conduction by means of heated cylinders or in another known manner.

Im Betrieb wird eine Papierbahn 1 mit hoher Eingangsfeuchte, beispielsweise 20 %, in den Satinierkalander 3 eingeführt, so daß sämtliche Walzenspalte 8 mit Ausnahme des untersten Walzenspaltes 8b mit vergleichsweise hoher Feuchte durchlaufen werden, was zu einer sehr guten Glättung des Papiers führt. Eine weitere Verbesserung ergibt sich, wenn zumindest ein Teil der harten Walzen 6 beheizt ist und/oder wenn sich der Bezug der weichen Walzen 7 infolge der ständigen elastischen Verformung erwärmt, also die Papierbahn 1 außer der hohen Feuchte auch noch eine höhere Temperatur annimmt. Die Trocknungsvorrichtung 4 setzt die hohe Feuchte bis annähernd auf den gewünschten Endwert herab, beispielsweise auf 5 %, wobei sich allerdings die Fasern an der Oberfläche teilweise aufrichten. Aus diesem Grund erfolgt eine nochmalige Druckbehandlung im untersten Walzenspalt 8b. Dies geschieht bei herabgesetzter Feuchte, was aber ausreicht, um die gewünschte hohe Glätte zu erzeugen.In operation, a paper web 1 with high input moisture, for example 20%, is introduced into the calendering calender 3, so that all the nips 8, with the exception of the lowest nip 8b, are run through with a comparatively high moisture, which leads to very good smoothing of the paper. A further improvement results if at least some of the hard rollers 6 are heated and / or if the cover of the soft rollers 7 heats up due to the constant elastic deformation, that is to say the paper web 1 apart from the high one Humidity also assumes a higher temperature. The drying device 4 lowers the high humidity to approximately the desired final value, for example to 5%, although the fibers on the surface partially straighten up. For this reason, pressure treatment is carried out again in the lowest nip 8b. This happens when the humidity is reduced, which is enough to produce the desired high smoothness.

Abwandlungen vom gezeigten Ausführungsbeispiel sind in vielerlei Hinsicht möglich, ohne den Grundgedanken der Erfindung zu verlassen. Beispielsweise kann das Papier auch in mehreren aufeinanderfolgenden Kompaktkalandern behandelt werden, wobei die Trocknungsvorrichtung wiederum am Ende der Behandlungsstrecke, jedoch auf jeden Fall vor dem letzten Walzenspalt, angeordnet ist.Modifications from the exemplary embodiment shown are possible in many respects without departing from the basic idea of the invention. For example, the paper can also be treated in several successive compact calenders, with the drying device again being arranged at the end of the treatment section, but in any case before the last nip.

Claims (12)

  1. Process for finishing a paper web with a high incoming moisture content subjected to pressure treatment in a plurality of nips and to drying outside a nip, characterised in that drying is carried out between two nips once the paper web has passed through the nips so that at least one pressure treatment in a nip follows the drying process, and that drying is effected to close to the desired final moisture value.
  2. Process according to claim 1, characterised in that the subsequent pressure treatment is effected in only one nip.
  3. Process according to claim 1 or claim 2, characterised in that drying can be controlled in zones over the width of the web.
  4. Process according to one of claims 1 to 3, characterised in that properties of the finished web, such as moisture content, gloss and/or smoothness are measured and drying is effected as a function thereof.
  5. Process according to one of claims 1 to 4, characterised in that the steam produced during drying is exhausted.
  6. Process according to one of claims 1 to 5, characterised in that drying is effected by means of radiation, convection or thermal conduction.
  7. Apparatus for carrying out the process according to one of claims 1 to 6, comprising a vertical roll stack with a plurality of nips (8) formed between the rolls (6, 7) and a drying apparatus (4), characterised in that the drying apparatus (4) is arranged on the lower stack end between two nips (8a, 8b) as the paper web (1) moves from the top to the bottom.
  8. Apparatus according to claim 7, characterised in that the drying apparatus (4) has individual drying elements (16) distributed over the width of the web, the drying rate of which can be controlled independently of one another.
  9. Apparatus according to claim 7 or claim 8, characterised by at least one sensor (11) for measuring a web property, such as moisture content, gloss and/or smoothness, arranged behind the last nip (8b) in the course of the paper web (1), and by a control apparatus (13) which controls the drying rate as a function of the measured values.
  10. Apparatus according to one of claims 7 to 9, characterised in that a steam-exhausting apparatus (17) is associated with the drying apparatus (4).
  11. Apparatus according to one of claims 7 to 10, characterised in that the drying apparatus (4) is provided between the second lowest (8a) and the lowermost (8b) nip in the course of the paper web (1).
  12. Apparatus according to claim 11, characterised in that the drying apparatus (4) is arranged level with the second lowest nip (8a) and the paper web (1) is guided to the lowermost nip (8b) following deflection below the drying apparatus.
EP94112691A 1993-10-14 1994-08-13 Process and apparatus for finishing a paper web Expired - Lifetime EP0648893B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4335053 1993-10-14
DE4335053A DE4335053A1 (en) 1993-10-14 1993-10-14 Method and device for finishing a paper web

Publications (2)

Publication Number Publication Date
EP0648893A1 EP0648893A1 (en) 1995-04-19
EP0648893B1 true EP0648893B1 (en) 1996-07-03

Family

ID=6500152

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94112691A Expired - Lifetime EP0648893B1 (en) 1993-10-14 1994-08-13 Process and apparatus for finishing a paper web

Country Status (6)

Country Link
EP (1) EP0648893B1 (en)
JP (1) JPH07150498A (en)
AT (1) ATE140047T1 (en)
CA (1) CA2132648A1 (en)
DE (2) DE4335053A1 (en)
FI (1) FI944799A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI102093B (en) * 1997-03-03 1998-10-15 Valmet Corp The finishing process unit for the web in a paper machine
US6076281A (en) * 1997-03-03 2000-06-20 Valmet Corporation Web finishing section in a paper machine
US5943787A (en) * 1997-03-03 1999-08-31 Valmet Corporation Web finishing section in a paper machine
US7086525B2 (en) 1999-09-23 2006-08-08 Stewart Systems, Inc. Conveyor for continuous proofing and baking apparatus

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE94232C (en) *
GB960933A (en) * 1962-01-22 1964-06-17 Clupak Inc Glazed uncreped extensible paper
US3647618A (en) * 1969-08-18 1972-03-07 Crown Zellerbach Corp Method and apparatus for improving formation uniformity of paper
DE3427967C2 (en) * 1984-07-28 1986-07-24 Kämmerer GmbH, 4500 Osnabrück Process for finishing paper and apparatus for carrying out the process
JP2646428B2 (en) * 1986-03-10 1997-08-27 コンソリデイテイド―バサースト インコーポレイテッド Papermaking method
JPH01183595A (en) * 1988-01-11 1989-07-21 Mitsubishi Paper Mills Ltd Supercalendering of coated paper
JPH01183592A (en) * 1988-01-18 1989-07-21 Mitsubishi Heavy Ind Ltd Controller for moisture content profile in dryer
US5045342A (en) * 1989-01-27 1991-09-03 Measurex Corporation Independent heat moisture control system for gloss optimization
JPH02264095A (en) * 1989-04-04 1990-10-26 Ebara Corp Hood equipment for dryer of paper-making machine
JPH03120539A (en) * 1989-10-03 1991-05-22 Fuji Photo Film Co Ltd Base for photographic paper
DE4023871A1 (en) * 1990-07-27 1992-02-06 Voith Gmbh J M DEVICE FOR DRAINING CONDENSATE FROM A STEAM-HEATED DRY CYLINDER
DE4126233C1 (en) * 1991-08-08 1992-09-17 Sulzer-Escher Wyss Gmbh, 7980 Ravensburg, De

Also Published As

Publication number Publication date
FI944799A (en) 1995-04-15
ATE140047T1 (en) 1996-07-15
FI944799A0 (en) 1994-10-12
DE4335053A1 (en) 1995-04-20
CA2132648A1 (en) 1995-04-15
DE59400398D1 (en) 1996-08-08
EP0648893A1 (en) 1995-04-19
JPH07150498A (en) 1995-06-13

Similar Documents

Publication Publication Date Title
DE2823738C2 (en) Method for leveling (smoothing) a paper web
DE19826899B4 (en) Method and apparatus for on-line calendering of SC-A paper
DE3874975T2 (en) CROSS-DIRECTION GLOSS CONTROL.
DE69307951T2 (en) Method and device for intensifying the action of a Yankee Press in a tissue paper machine
WO1995030049A1 (en) Process and device for producing paper webs coated on both sides
DE9320455U1 (en) Device for increasing the gloss and / or smoothness of a material web
EP0979897B1 (en) Process and apparatus for making paper online
DE19511145A1 (en) Calender for double-sided paper treatment
EP1020559B1 (en) Device for drying and smoothing fibrous webs
DE69834675T2 (en) Device for applying air to a web
EP0648893B1 (en) Process and apparatus for finishing a paper web
EP0732447A1 (en) Calender for treating a paper web on two faces
DE4112537C2 (en) Smoothness generating device
DE3416211A1 (en) METHOD FOR CALENDARING MAGNETIC LAYERS AND CALANDER FOR CARRYING OUT THIS METHOD
EP0957202B1 (en) Process and apparatus for making SC-A-paper online
DE102005031445A1 (en) Wetting treatment of fibrous sheet, e.g. of paper or cardboard, involves applying combination of steam and water in amounts dependent on independently measured parameters
EP1336686B1 (en) Extended nip calendar arrangement and process for satinizing a paper or cardboard web
EP4347949A1 (en) Method and device
EP1586697A1 (en) Paper machine
EP0631012B2 (en) Process and apparatus for adjusting the thickness, gloss and/or smoothness during the treatment of fibrous webs
EP0732443B2 (en) Calender for treating a paper web
DE3427967C2 (en) Process for finishing paper and apparatus for carrying out the process
DE19613878C1 (en) Calender for paper, having two treatment points
DE19508349A1 (en) Calender for the treatment of a paper web and method for its operation
EP1541757B1 (en) Method for satinizing a coated paper or cardboard web and calender

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

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT CH DE FR GB IT LI NL

17P Request for examination filed

Effective date: 19950323

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: VOITH SULZER FINISHING GMBH

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

17Q First examination report despatched

Effective date: 19951211

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT CH DE FR GB IT LI NL

REF Corresponds to:

Ref document number: 140047

Country of ref document: AT

Date of ref document: 19960715

Kind code of ref document: T

ITF It: translation for a ep patent filed

Owner name: JACOBACCI & PERANI S.P.A.

ET Fr: translation filed
REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: PATENTANWALTSBUREAU BOSSHARD UND LUCHS

REF Corresponds to:

Ref document number: 59400398

Country of ref document: DE

Date of ref document: 19960808

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

Effective date: 19960719

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19980723

Year of fee payment: 5

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

Ref country code: AT

Payment date: 19980727

Year of fee payment: 5

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

Ref country code: FR

Payment date: 19980813

Year of fee payment: 5

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

Ref country code: NL

Payment date: 19980825

Year of fee payment: 5

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

Ref country code: CH

Payment date: 19980923

Year of fee payment: 5

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

Ref country code: DE

Payment date: 19980929

Year of fee payment: 5

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: 19990813

Ref country code: AT

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

Effective date: 19990813

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

Ref country code: LI

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

Effective date: 19990831

Ref country code: CH

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

Effective date: 19990831

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

Ref country code: NL

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

Effective date: 20000301

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

Effective date: 19990813

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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

Ref country code: FR

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

Effective date: 20000428

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20000301

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

Ref country code: DE

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

Effective date: 20000601

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

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

Ref country code: IT

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

Effective date: 20050813