EP0652992B1 - Press of paper machine for thin papers - Google Patents

Press of paper machine for thin papers Download PDF

Info

Publication number
EP0652992B1
EP0652992B1 EP94917672A EP94917672A EP0652992B1 EP 0652992 B1 EP0652992 B1 EP 0652992B1 EP 94917672 A EP94917672 A EP 94917672A EP 94917672 A EP94917672 A EP 94917672A EP 0652992 B1 EP0652992 B1 EP 0652992B1
Authority
EP
European Patent Office
Prior art keywords
press
roller
gap
assembly according
felted
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
EP94917672A
Other languages
German (de)
French (fr)
Other versions
EP0652992B2 (en
EP0652992A1 (en
Inventor
Karl Steiner
Albrecht Meinecke
Rui Goncalves
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JM Voith GmbH
Original Assignee
JM Voith GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=25926346&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0652992(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from DE4318036A external-priority patent/DE4318036C1/en
Priority claimed from DE19934321402 external-priority patent/DE4321402A1/en
Application filed by JM Voith GmbH filed Critical JM Voith GmbH
Publication of EP0652992A1 publication Critical patent/EP0652992A1/en
Application granted granted Critical
Publication of EP0652992B1 publication Critical patent/EP0652992B1/en
Publication of EP0652992B2 publication Critical patent/EP0652992B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/04—Arrangements thereof
    • D21F3/045—Arrangements thereof including at least one extended press nip
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/0281—Wet presses in combination with a dryer roll
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/04—Arrangements thereof

Definitions

  • the invention relates to a press section of a paper machine for thin papers according to the preamble of claim 1, in particular for single-sided papers or tissue, in particular the web take-off on the last press unit.
  • Press units in paper machines in which the water is discharged on one side are well known. For example, reference is made to the document "Wochenblatt für Textilfabrikation 5 (1988)", page 173 ff. There, after the press nip, the web is removed from the smooth roll in free train, e.g. a smoothing press, a drying cylinder or an in-line dryer section.
  • German patent application DE 42 24 730 C1 which does not belong to the prior art after the priority date of the present application, in which a decrease in the paper web from a roller through a press hose of an extended nip press 13.3 is shown in FIG.
  • the disadvantage here is that the service life of the press hose is greatly reduced by contact with the hot surface of the following cylinder 20.
  • a press nip which is formed from a circumferential, smooth surface in contact with paper and a felted press roller, the smooth surface transfers the paper web behind the press nip to a heatable roller, avoiding a free paper draw, the smooth surface being the outer surface of a tube roller is formed with a rigid roll shell.
  • the felted press roll is an extended nip or shoe press roll.
  • the smooth tube roll in front of the press nip forms a further, preceding press nip (pre-press nip) with another felted press roll.
  • pre-press nip preceding press nip
  • a separate, endless felt is provided for each press nip; however, a single felt can also be used for both press nips may be advantageous due to operational circumstances.
  • the further felted press roll is also a shoe or extended-nip press roll.
  • the further felted press roll is a suction roll, the suction zone of which is predominantly in front of the pre-press nip.
  • the smooth tube roller may also be advantageous to design the smooth tube roller as a deflection adjusting roller in order to maintain uniform line pressures and thus improve web transfer.
  • a further advantageous embodiment of the press section results when the heatable roller is a non-felted tube roller guiding the web, which delivers the web to a drying cylinder, preferably avoiding the free paper draw. It can also be advantageous here if the heatable roll forms an after-press nip with an additional, felted press roll.
  • the gap between the smooth tube roller and the heatable roller in particular a drying cylinder, can be opened in order to facilitate starting without paper.
  • Figures 1 to 7 show variants of a web transfer between the press unit and the subsequent paper machine with smooth rollers.
  • FIG. 1 shows the last press unit of a paper machine with a smooth central roller 1 (a tube roller - that is to say with a dimensionally stable outer jacket) which, with another roller 2, forms a penultimate press nip together with a single felt running through it.
  • the roller 2 can be a suction roller or a blind-drilled roller.
  • the paper web then remains on the smooth roller 1 and is guided to a last press nip which is formed by the roller 1 and an extended nip press 3. Thereafter, the paper web remains on the smooth roller 1 and is transferred to a large smoothing cylinder 4, which can also be designed as a tissue cylinder, according to the invention.
  • Figure 2 shows a similar arrangement as Figure 1, but the last press nip between the central roll 1, which is also designed as a tube roll, and the counter roll 3 is not designed as a long nip press but as a so-called smoothing press.
  • the paper web also remains on the smooth central roller 1 after the last press nip and is then transferred to a cylinder 4, which is heated, for example.
  • a cylinder 4 which is heated, for example.
  • FIG. 3 shows a special embodiment of the transfer according to the invention.
  • the beginning of a paper machine is shown here, in which stock suspension is injected between a screen 6 and a felt 10, which abut a blow roller 20, via a headbox 11.
  • the paper web is transported lying on this felt up to the press nip, which is formed here by an extended nip press 3 and the smooth tube roll 1 according to the invention. Possible devices between the press nip and the headbox are not shown here.
  • the paper web is transferred directly to a subsequent cylinder 5 via the smooth roller 1.
  • the roller 1 can preferably be designed as a deflection adjusting roller, in order to achieve the to ensure even pressure, especially on the following cylinder 5.
  • Figure 4 shows a situation at the last press nip of a press section.
  • a press unit between two cylinders 1 and 3 is shown here, the cylinder 1 representing the smooth cylinder according to the invention with a dimensionally stable surface.
  • the two cylinders 1 and 3 are provided here according to the invention on a movable lever arm 40, so that they can be moved in and out in their entirety by the subsequent large cylinder 30 without the press nip between the two cylinders 1 and 3 changing.
  • FIG. 5 shows a further variant of the invention.
  • a felt 10 carrying a paper web 100 is shown.
  • the felt 10 guides the paper web from above over a cylinder 300, which forms a penultimate press nip with the subsequent smooth tube roll 1 according to the invention.
  • the felt runs via a conditioning device 8 and a deflection roll 400 separately from the paper web back to the last press nip via the roll 600 and becomes returned from there, while the paper web remains on the smooth roller 1 and is transferred directly to the subsequent drying cylinder 7.
  • Figure 6 shows a press unit according to the invention of a compact design. It is introduced here via a headbox 11 stock suspension between a felt and a smooth tube roll 1. An elongated nip press 3 rests on the smooth tube roll 1 and then in turn on the smooth roll a next smooth roll 1 ', which transfers the paper web to the subsequent station of the paper machine.
  • FIG. 7 shows the arrangement according to the invention using the example of a paper machine for producing crepe paper.
  • a belt 500 coming from the right can be seen on which the paper web is guided.
  • the tape is passed together with the paper web over a suction roller 200, which transfers the paper web to a profile roller 1 with a rigid jacket.
  • the belt 500 is being fed back again via a deflection roller, the paper web remains on the profile roller 1 and is fed to a press nip, formed by the profile roller 1 and an extended nip press 3, from where it continues to remain on the surface of the profile roller and then is transferred to a crepe cylinder 4, which rests on the profile roller 1.

Abstract

PCT No. PCT/EP94/01730 Sec. 371 Date Jan. 30, 1995 Sec. 102(e) Date Jan. 30, 1995 PCT Filed May 27, 1994 PCT Pub. No. WO94/28240 PCT Pub. Date Dec. 8, 1994The press section of a paper machine for thin papers has the following characteristics: a pressing gap is formed by a rotary, smooth surface (1) in contact with the paper and by a felted pressing roll (3); the smooth surface (1) transfers the paper web downstream of the pressing gap to a heatable roll (4) without free pulling of the paper web. The invention is characterized in that the smooth surface (1) is the outer surface of a tubular roll with dimensionally stiff roll sleeve.

Description

Die Erfindung betrifft eine Pressenpartie einer Papiermaschine für dünne Papiere gemäß dem Oberbegriff des Anspruches 1 insbesondere für einseitige Papiere oder Tissue, insbesondere die Bahnabnahme an der letzten Presseneinheit.The invention relates to a press section of a paper machine for thin papers according to the preamble of claim 1, in particular for single-sided papers or tissue, in particular the web take-off on the last press unit.

Presseneinheiten in Papiermaschinen, bei denen das Wasser einseitig abgeführt wird sind hinlänglich bekannt. Beispielsweise wird auf die Schrift "Wochenblatt für Papierfabrikation 5 (1988)", Seite 173 ff, verwiesen. Es wird dort nach dem Preßspalt die Bahn im freien Zug von der glatten Walze abgenommen um z.B. einer Glättpresse, einem Trockenzylinder oder einer Reihen-Trockenpartie zugeführt zu werden.Press units in paper machines in which the water is discharged on one side are well known. For example, reference is made to the document "Wochenblatt für Papierfabrikation 5 (1988)", page 173 ff. There, after the press nip, the web is removed from the smooth roll in free train, e.g. a smoothing press, a drying cylinder or an in-line dryer section.

Nachteil dieser Ausführungsformen ist, daß spezielle Überführelemente für die Bahn notwendig sind und die Abrißhäufigkeit relativ hoch ist.The disadvantage of these embodiments is that special transfer elements are necessary for the web and the frequency of tearing is relatively high.

Weiterhin wird auf die nach dem Prioritätstag der vorliegenden Anmeldung und damit nicht zum Stand der Technik gehörende deutsche Patentanmeldung DE 42 24 730 C1 verwiesen, in der in Figur 8 eine Abnahme der Papierbahn von einer Walze durch einen Preßschlauch einer Langspaltpresse 13.3 dargestellt ist. Hier ist nachteilig, daß die Standzeit des Preßschlauches durch den Kontakt mit der heißen Oberfläche des folgenden Zylinders 20 stark reduziert wird.Furthermore, reference is made to the German patent application DE 42 24 730 C1, which does not belong to the prior art after the priority date of the present application, in which a decrease in the paper web from a roller through a press hose of an extended nip press 13.3 is shown in FIG. The disadvantage here is that the service life of the press hose is greatly reduced by contact with the hot surface of the following cylinder 20.

Es ist Aufgabe der Erfindung eine Presseneinheit darzustellen bei der auf derartige Überführelemente verzichtet werden kann, wodurch die Abrißhäufigkeit der Papierbahn reduziert wird und gleichzeitig Kosteneinsparungen durch verringerte Betriebskosten erbringt.It is an object of the invention to present a press unit in which such transfer elements can be dispensed with, as a result of which the frequency of tearing of the paper web is reduced and, at the same time, cost savings are achieved through reduced operating costs.

Die Aufgabe wird durch die kennzeichnenden Merkmale des Anspruches 1 gelöst.The object is achieved by the characterizing features of claim 1.

Hierbei ergeben sich die folgenden Vorteile:

  • Die heizbare Walze (z.B ein Trocken oder Glättzylinder), an die die Papierbahn von der Rohr-Preßwalze überführt wird, kommt weder mit einem Filz, noch mit einem "Preßschlauch" oder "Preßmantel" in Kontakt.
  • Der Filz muß nur einen einzigen Preßspalt durchlaufen.
  • Daraus ergibt sich eine höhere Lebensdauer sowohl für den Preßmantel als auch den Filz.
This has the following advantages:
  • The heatable roll (for example a drying or smoothing cylinder) to which the paper web is transferred from the tube press roll does not come into contact with either a felt or a "press hose" or "press jacket".
  • The felt only has to pass through a single press nip.
  • This results in a longer service life for both the press jacket and the felt.

Gemäß dem Gedanken der Erfindung ergeben sich die folgenden, möglichen Ausgestaltungsformen einer Pressenpartie für vorzugsweise dünne Papiere, insbesondere auch Tissuepapiere:According to the idea of the invention, the following possible configurations of a press section for preferably thin papers, in particular also tissue papers, result:

Es ist zunächst ein Preßspalt vorgesehen, der aus einer umlaufenden, glatten papierberührten Oberfläche und aus einer befilzten Preßwalze gebildet wird, die glatte Oberfläche übergibt unter Vermeidung eines freien Papierzuges die Papierbahn hinter dem Preßspalt an eine heizbare Walze, wobei die glatte Oberfläche als Mantelfläche einer Rohrwalze mit formsteifem Walzenmantel ausgebildet ist.First, a press nip is provided, which is formed from a circumferential, smooth surface in contact with paper and a felted press roller, the smooth surface transfers the paper web behind the press nip to a heatable roller, avoiding a free paper draw, the smooth surface being the outer surface of a tube roller is formed with a rigid roll shell.

Vorteilhaft ist es, wenn die befilzte Preßwalze eine Langspalt- oder Schuhpreßwalze ist.It is advantageous if the felted press roll is an extended nip or shoe press roll.

Weiterhin ist es besonders vorteilhaft, wenn bei einer derart ausgestalteten Pressenpartie die glatte Rohrwalze vor dem Preßspalt mit einer weiteren befilzten Preßwalze einen weiteren, vorangehenden Preßspalt (Vor-Preßspalt) bildet. Hier ist es auch vorteilhaft wenn für beide Preßspalte jeweils ein separater, endloser Filz vorgesehen ist; jedoch kann auch ein einziger Filz für beide Preßspalte aufgrund der Betriebsumstände vorteilhaft sein. Besonders vorteilhaft bezüglich der Trockenleistung kann es sein, wenn auch die weitere befilzte Preßwalze eine Schuh- oder Langspaltpreßwalze ist.Furthermore, it is particularly advantageous if, in the case of a press section designed in this way, the smooth tube roll in front of the press nip forms a further, preceding press nip (pre-press nip) with another felted press roll. Here it is also advantageous if a separate, endless felt is provided for each press nip; however, a single felt can also be used for both press nips may be advantageous due to operational circumstances. It can be particularly advantageous with regard to the drying performance if the further felted press roll is also a shoe or extended-nip press roll.

Vorteilhaft kann auch sein, wenn die weitere befilzte Preßwalze eine Saugwalze ist, deren Saugzone überwiegend vor dem Vor-Preßspalt liegt.It can also be advantageous if the further felted press roll is a suction roll, the suction zone of which is predominantly in front of the pre-press nip.

Bei den dargestellten Ausführungsformen kann es auch vorteilhaft sein, die glatte Rohrwalze als Durchbiegungs-Einstellwalze auszugestalten, um gleichmäßige Liniendrücke zu erhalten und damit die Bahnübergabe zu verbessern.
Eine weitere vorteilhafte Ausgestaltung der Pressenpartie ergibt sich, wenn die heizbare Walze eine nicht befilzte, die Bahn führende Rohrwalze ist, welche die Bahn an einen Trockenzylinder abgibt, wobei vorzugsweise der freie Papierzug vermieden wird. Hierbei kann es auch vorteilhaft sein, wenn die heizbare Walze mit einer zusätzlichen, befilzten Preßwalze einen Nach-Preßspalt bildet.In the illustrated embodiments, it may also be advantageous to design the smooth tube roller as a deflection adjusting roller in order to maintain uniform line pressures and thus improve web transfer.
A further advantageous embodiment of the press section results when the heatable roller is a non-felted tube roller guiding the web, which delivers the web to a drying cylinder, preferably avoiding the free paper draw. It can also be advantageous here if the heatable roll forms an after-press nip with an additional, felted press roll.

Bei den dargestellten Ausführungen kann es sich ebenfalls als vorteilhaft erweisen, wenn der Spalt zwischen der glatten Rohrwalze und der beheizbaren Walze, insbesondere eines Trockenzylinders, öffenbar ist, um das Anfahren ohne Papier zu erleichtern.In the embodiments shown, it can also prove to be advantageous if the gap between the smooth tube roller and the heatable roller, in particular a drying cylinder, can be opened in order to facilitate starting without paper.

Die Erfindung ist anhand der Zeichnungen näher erläutert. Darin ist im übrigen folgendes dargestellt:The invention is explained in more detail with reference to the drawings. It also shows the following:

Figuren 1 bis 7 zeigen Ausführungsvarianten einer Bahnübergabe zwischen der Presseneinheit und der nachfolgenden Papiermaschine mit glatten Walzen.Figures 1 to 7 show variants of a web transfer between the press unit and the subsequent paper machine with smooth rollers.

Figur 1 zeigt die letzte Presseneinheit einer Papiermaschine mit einer glatten Zentralwalze 1 (einer Rohrwalze - also mit formsteifem Außenmantel), die mit einer anderen Walze 2 einen vorletzten Preßspalt zusammen mit einem hindurchlaufenden Einfachfilz bildet. Die Walze 2 kann dabei eine Saugwalze oder eine blind-gebohrte Walze sein. Die Papierbahn bleibt danach auf der glatten Walze 1 liegen und wird zu einem letzten Preßspalt geführt, der durch die Walze 1 und eine Langspalt-Presse 3 gebildet wird. Danach bleibt die Papierbahn weiterhin an der glatten Walze 1 liegen und wird zu einem großen Glättzylinder 4 der auch als Tissue-Zylinder ausgebildet sein kann, erfindungsgemäß überführt.FIG. 1 shows the last press unit of a paper machine with a smooth central roller 1 (a tube roller - that is to say with a dimensionally stable outer jacket) which, with another roller 2, forms a penultimate press nip together with a single felt running through it. The roller 2 can be a suction roller or a blind-drilled roller. The paper web then remains on the smooth roller 1 and is guided to a last press nip which is formed by the roller 1 and an extended nip press 3. Thereafter, the paper web remains on the smooth roller 1 and is transferred to a large smoothing cylinder 4, which can also be designed as a tissue cylinder, according to the invention.

Figur 2 zeigt eine ähnliche Anordnung wie Figur 1, jedoch ist der letzte Preßspalt zwischen der Zentralwalze 1, die ebenfalls als Rohrwalze ausgebildet ist, und der Gegenwalze 3 nicht als Langspalt-Presse sondern als sogenannte Smoothing-Presse ausgeführt. Die Papierbahn bleibt ebenfalls wie in Figur 2 nach dem letzten Preßspalt auf der glatten Zentralwalze 1 liegen und wird danach zu einem beispielsweise beheizten Zylinder 4 überführt. Alternativ besteht hier auch die Möglichkeit die Papierbahn vom Zylinder 4 direkt an einen darauf folgenden Glättzylinder weiterzugeben.Figure 2 shows a similar arrangement as Figure 1, but the last press nip between the central roll 1, which is also designed as a tube roll, and the counter roll 3 is not designed as a long nip press but as a so-called smoothing press. As in FIG. 2, the paper web also remains on the smooth central roller 1 after the last press nip and is then transferred to a cylinder 4, which is heated, for example. Alternatively, there is also the possibility of passing the paper web from cylinder 4 directly to a subsequent smoothing cylinder.

Figur 3 zeigt eine besondere Ausführungsform der erfindungsgemäßen Überführung. Es ist hier der Beginn einer Papiermaschine dargestellt, in der über einen Stoffauflauf 11 Stoffsuspension zwischen einem Sieb 6 und einem Filz 10, die an einer Blaswalze 20 anliegen, eingespritzt wird. Die Papierbahn wird auf diesem Filz liegend bis zum Preßspalt, der hier durch eine Langspalt-Presse 3 und der erfindungsgemäßen glatten Rohrwalze 1 gebildet wird, weiter transportiert. Mögliche Vorrichtungen zwischen dem Preßspalt und dem Stoffauflauf sind hier nicht dargestellt. Nach dem letzten Preßspalt wird die Papierbahn erfindungsgemäß über die glatte Walze 1 direkt an einen darauf folgenden Zylinder 5 übergeben. Die Walze 1 kann vorzugsweise als Durchbiegungs-Einstellwalze ausgeführt sein, um einen möglichst gleichmäßigen Andruck, insbesondere an den folgenden Zylinder 5, zu gewährleisten.
Figur 4 zeigt eine Situation am letzten Preßspalt einer Pressenpartie. Es ist hier eine Presseneinheit zwischen zwei Zylindern 1 und 3 dargestellt, wobei der Zylinder 1 den erfindungsgemäßen glatten Zylinder mit formsteifer Oberfläche darstellt. Die beiden Zylinder 1 und 3 sind erfindungsgemäß hier an einem beweglichen Hebelarm 40 vorgesehen, so daß sie in ihrer Gesamtheit von dem darauf folgenden großen Zylinder 30 an- und abgefahren werden können ohne daß sich der Preßspalt zwischen den beiden Zylindern 1 und 3 ändert.FIG. 3 shows a special embodiment of the transfer according to the invention. The beginning of a paper machine is shown here, in which stock suspension is injected between a screen 6 and a felt 10, which abut a blow roller 20, via a headbox 11. The paper web is transported lying on this felt up to the press nip, which is formed here by an extended nip press 3 and the smooth tube roll 1 according to the invention. Possible devices between the press nip and the headbox are not shown here. After the last press nip, the paper web is transferred directly to a subsequent cylinder 5 via the smooth roller 1. The roller 1 can preferably be designed as a deflection adjusting roller, in order to achieve the to ensure even pressure, especially on the following cylinder 5.
Figure 4 shows a situation at the last press nip of a press section. A press unit between two cylinders 1 and 3 is shown here, the cylinder 1 representing the smooth cylinder according to the invention with a dimensionally stable surface. The two cylinders 1 and 3 are provided here according to the invention on a movable lever arm 40, so that they can be moved in and out in their entirety by the subsequent large cylinder 30 without the press nip between the two cylinders 1 and 3 changing.

Figur 5 zeigt eine weitere Variante der Erfindung. Es ist von links kommend ein eine Papierbahn 100 tragender Filz 10 dargestellt. Der Filz 10 führt die Papierbahn von oben über einen Zylinder 300, der mit der darauffolgenden erfindungsgemäßen glatten Rohrwalze 1 einen vorletzten Preßspalt bildet. Während nach dem vorletzten Preßspalt die Papierbahn direkt zum letzten Preßspalt zwischen der glatten Rohrwalze 1 und der nachfolgenden Walze 600 geführt wird, verläuft der Filz über eine Konditioniervorrichtung 8 und eine Umlenkwalze 400 getrennt von der Papierbahn wieder zurück zum letzten Preßspalt über die Walze 600 und wird von dort zurückgeführt, während die Papierbahn an der glatten Walze 1 liegenbleibt und direkt an den nachfolgenden Trockenzylinder 7 übergeben wird.Figure 5 shows a further variant of the invention. Coming from the left, a felt 10 carrying a paper web 100 is shown. The felt 10 guides the paper web from above over a cylinder 300, which forms a penultimate press nip with the subsequent smooth tube roll 1 according to the invention. While after the penultimate press nip the paper web is guided directly to the last press nip between the smooth tube roll 1 and the subsequent roll 600, the felt runs via a conditioning device 8 and a deflection roll 400 separately from the paper web back to the last press nip via the roll 600 and becomes returned from there, while the paper web remains on the smooth roller 1 and is transferred directly to the subsequent drying cylinder 7.

Figur 6 zeigt eine erfindungsgemäße Presseneinheit kompakter Bauweise. Es wird hier über einen Stoffauflauf 11 Stoffsuspension zwischen ein Filz und eine glatte Rohrwalze 1 eingeführt. An der glatten Rohrwalze 1 liegt eine Langspalt-Presse 3 an und daran folgend wiederum an der glatten Walze eine nächste glatte Walze 1', die die Papierbahn zur nachfolgenden Station der Papiermaschine überführt.Figure 6 shows a press unit according to the invention of a compact design. It is introduced here via a headbox 11 stock suspension between a felt and a smooth tube roll 1. An elongated nip press 3 rests on the smooth tube roll 1 and then in turn on the smooth roll a next smooth roll 1 ', which transfers the paper web to the subsequent station of the paper machine.

Figur 7 zeigt die erfindungsgemäße Anordnung am Beispiel einer Papiermaschine zum Erzeugen von Krepp-Papier. Es ist ein von rechts kommendes Band 500 zu sehen, auf dem die Papierbahn geführt wird. Das Band wird zusammen mit der Papierbahn über eine Saugwalze 200 geleitet, die die Papierbahn an eine Profilwalze 1 mit formsteifem Mantel übergibt. Während das Band 500 wieder über eine Umlenkrolle zurückgeführt wird, verbleibt die Papierbahn auf der Profilwalze 1 und wird einem Preßspalt, gebildet durch die Profilwalze 1 und eine Langspalt-Presse 3, zugeführt, von wo aus sie weiterhin auf der Oberfläche der Profilwalze verbleibt und dann auf einen Krepp-Zylinder 4 überführt wird, der an der Profilwalze 1 anliegt.FIG. 7 shows the arrangement according to the invention using the example of a paper machine for producing crepe paper. A belt 500 coming from the right can be seen on which the paper web is guided. The tape is passed together with the paper web over a suction roller 200, which transfers the paper web to a profile roller 1 with a rigid jacket. While the belt 500 is being fed back again via a deflection roller, the paper web remains on the profile roller 1 and is fed to a press nip, formed by the profile roller 1 and an extended nip press 3, from where it continues to remain on the surface of the profile roller and then is transferred to a crepe cylinder 4, which rests on the profile roller 1.

Claims (11)

  1. Press assembly of a paper machine for thin papers with the following features:
    1.1 a press gap is provided which is formed of a peripheral, smooth surface in contact with the paper and a felted press roller (3, 600),
    characterised in that
    1.2 the smooth surface passes the paper web (100) behind the press gap to a heatable roller (4, 5, 7, 3c, 1') whilst avoiding a free paper pull, and
    1.3 the smooth surface is the casing surface of a tubular roller with shape-retaining roller casing (1).
  2. Press assembly according to Claim 1, characterised in that the felted press roller (3) is an elongated gap or shoe-press roller.
  3. Press assembly according to Claim 1 and 2, characterised in that the smooth tubular roller (1) establishes ahead of the press gap together with a further felted press roller (2, 200, 300) an additional pre-press gap located ahead of the press gap of feature 1.1.
  4. Press assembly according to Claim 3, characterised in that for both press gaps is provided a separate continuous felt.
  5. Press assembly according to one of Claims 3 or 4, characterised in that the additional felted press roller is a shoe- or elongated-gap press roller.
  6. Press assembly according to Claim 3, characterised in that for both press gaps is provided a respective single communal felt (10).
  7. Press assembly according to one of Claims 3, 4 or 6, characterised in that the additional felted press roller (200) is a suction roller, the suction zone of which is predominantly in front of the pre-press gap.
  8. Press assembly according to one of Claims 1 to 7, characterised in that the smooth tubular roller (1) is a flexible adjustment roller.
  9. Press assembly according to one of Claims 1 to 8, characterised in that the heatable roller (4) is an unfelted tubular roller which guides the web and which passes the web to a drying cylinder, preferably whilst avoiding a free paper pull.
  10. Press assembly according to Claim 8, characterised in that the heatable roller (4) together with an additional felted press roller form a post-press gap.
  11. Press assembly according to one of Claims 1 to 10, characterised in that the gap between the smooth tubular roller (1) and the heatable roller (30), in particular of a drying cylinder, can be opened.
EP94917672A 1993-05-29 1994-05-27 Press of paper machine for thin papers Expired - Lifetime EP0652992B2 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE4318036 1993-05-29
DE4318036A DE4318036C1 (en) 1993-05-29 1993-05-29 Press unit of a paper machine for the production of tissue paper
DE4321402 1993-06-26
DE19934321402 DE4321402A1 (en) 1993-06-26 1993-06-26 Paper-making machine press section - has a smooth continuous surface as final unit to transfer web onwards in the prodn. of thin paper
PCT/EP1994/001730 WO1994028240A1 (en) 1993-05-29 1994-05-27 Press of paper machine for thin papers

Publications (3)

Publication Number Publication Date
EP0652992A1 EP0652992A1 (en) 1995-05-17
EP0652992B1 true EP0652992B1 (en) 1997-07-30
EP0652992B2 EP0652992B2 (en) 2000-11-02

Family

ID=25926346

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94917672A Expired - Lifetime EP0652992B2 (en) 1993-05-29 1994-05-27 Press of paper machine for thin papers

Country Status (10)

Country Link
US (1) US5670023A (en)
EP (1) EP0652992B2 (en)
JP (1) JPH08502104A (en)
AT (1) ATE156208T1 (en)
BR (1) BR9405408A (en)
CA (1) CA2141292A1 (en)
DE (1) DE59403546D1 (en)
ES (1) ES2105720T3 (en)
FI (1) FI950376A (en)
WO (1) WO1994028240A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE511485C2 (en) * 1998-02-04 1999-10-04 Valmet Karlstad Ab Paper machine and process for making a paper press web
US6547924B2 (en) 1998-03-20 2003-04-15 Metso Paper Karlstad Ab Paper machine for and method of manufacturing textured soft paper
US6159343A (en) * 1998-07-08 2000-12-12 Beloit Technologies, Inc. Press-to-dryer apparatus
US6248210B1 (en) 1998-11-13 2001-06-19 Fort James Corporation Method for maximizing water removal in a press nip
US6231723B1 (en) 1999-06-02 2001-05-15 Beloit Technologies, Inc Papermaking machine for forming tissue employing an air press
SE514973C2 (en) * 1999-09-07 2001-05-21 Valmet Karlstad Ab Method and paper machine for making a liner
ATE520820T1 (en) * 2007-12-20 2011-09-15 Stora Enso Oyj ARRANGEMENT FOR THE PRESS SECTION OF A MACHINE FOR PRODUCING A WEB OF MATERIAL AND CARDBOARD OR PAPER PRODUCED IN SUCH ARRANGEMENT
AT509992B1 (en) * 2010-10-27 2012-01-15 Andritz Ag Maschf DEVICE AND METHOD FOR DRYING FIBROUS MATERIAL
ES2635323T3 (en) 2011-12-07 2017-10-03 Valmet Aktiebolag Press roller with extended contact area for papermaking machine and tissue paper manufacturing process
JP6157589B2 (en) 2012-04-19 2017-07-05 バルメット、アクチボラグＶａｌｍｅｔ Ａｋｔｉｅｂｏｌａｇ Stretching nip roll, stretching nip press using the stretching nip roll, papermaking machine, and operating method of stretching nip press

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1381360A (en) * 1972-12-12 1975-01-22 Valmet Oy Paper machine multi-roll press assemblies

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE273783C (en) †
DE295540C (en) *
US2209757A (en) * 1936-05-20 1940-07-30 Beloit Iron Works Felt arrangement for horizontal press roll assemblies
DE750222C (en) * 1940-08-09 1944-12-20 J M Voith Fa Suction press for paper machines with smooth cylinder
US3627630A (en) † 1969-12-04 1971-12-14 Beloit Corp Method of flash drying pulp
SE374150B (en) * 1970-03-17 1975-02-24 Ahlstroem Oy
FI79731C (en) * 1980-12-18 1990-02-12 Beloit Corp Press section of a paper machine
US4483745A (en) * 1982-09-29 1984-11-20 Beloit Corporation Method and apparatus of sheet transfer using a nonporous smooth surfaced belt
FI64823C (en) † 1982-11-02 1984-01-10 Valmet Oy OEVERFOERINGSANORDNING FOER LEDANDE AV PAPPERSBANAN FRAON PRESSPARTIET I EN PAPPERSMASKIN TILL DESS TORKPARTI
US4729921A (en) † 1984-10-19 1988-03-08 E. I. Du Pont De Nemours And Company High density para-aramid papers
EP0289477A3 (en) * 1987-04-28 1989-03-08 Valmet Paper Machinery Inc. Method for hot-pressing of a paper web and a drying device for the implementation of the method
US4880502A (en) * 1987-08-11 1989-11-14 Beloit Corporation Press drying apparatus with deflection control and blow box cooling
FI83895C (en) † 1988-04-13 1991-09-10 Valmet Paper Machinery Inc Method and apparatus for press processing a paper web
US4874470A (en) * 1988-10-04 1989-10-17 Beloit Corporation Papermaking press section and transfer arrangement to dryer section
FI93663C (en) * 1990-06-06 1995-05-10 Valmet Paper Machinery Inc Method and apparatus in a press section of a paper machine provided with a separate press
DE4042480C2 (en) * 1990-08-17 2000-02-10 Voith Gmbh J M Press section of a paper machine
DE4112355A1 (en) * 1991-04-16 1992-10-22 Escher Wyss Gmbh PRESS RELEASE OF A PAPER MACHINE
DE9206340U1 (en) * 1991-08-10 1992-08-13 Sulzer-Escher Wyss Gmbh, 7980 Ravensburg, De
DE4140879A1 (en) * 1991-12-11 1993-06-17 Voith Gmbh J M PRESS RELEASE
ATE151132T1 (en) * 1993-01-23 1997-04-15 Voith Gmbh J M WET PRESS FOR A PAPER MACHINE
DE4318036C1 (en) * 1993-05-29 1994-07-28 Voith Gmbh J M Press unit of a paper machine for the production of tissue paper
DE4321402A1 (en) * 1993-06-26 1993-12-02 Voith Gmbh J M Paper-making machine press section - has a smooth continuous surface as final unit to transfer web onwards in the prodn. of thin paper

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1381360A (en) * 1972-12-12 1975-01-22 Valmet Oy Paper machine multi-roll press assemblies

Also Published As

Publication number Publication date
EP0652992B2 (en) 2000-11-02
DE59403546D1 (en) 1997-09-04
US5670023A (en) 1997-09-23
FI950376A0 (en) 1995-01-27
ATE156208T1 (en) 1997-08-15
CA2141292A1 (en) 1994-12-08
JPH08502104A (en) 1996-03-05
FI950376A (en) 1995-01-27
WO1994028240A1 (en) 1994-12-08
BR9405408A (en) 1999-09-08
EP0652992A1 (en) 1995-05-17
ES2105720T3 (en) 1997-10-16

Similar Documents

Publication Publication Date Title
EP1314817B1 (en) Method and machine for manufacturing a fibrous web
EP0509199A1 (en) Press section for a papermachine
EP0652992B1 (en) Press of paper machine for thin papers
EP1954877A2 (en) Tissue machine
EP0598991B1 (en) Press section for a paper machine
DE4321399A1 (en) Paper-making machine press section - has continuous water impermeable belt to take wet web from fourdrinier or blanket to press shoe
EP0628656B1 (en) Press section of papermachine for making tissue paper
DE10159115A1 (en) press section
EP1586697B1 (en) Paper machine
DE102018124016A1 (en) Device and method for dewatering a fibrous web
AT521367B1 (en) DEVICE AND METHOD FOR CONVERTING A STRIP OF A TRAIN
EP0870866B1 (en) Apparatus and process for the dewatering of a web
EP2391769B1 (en) Device for producing a material web
DE4301751A1 (en) Method and device for detaching a running web from two wire belts
DE19705030A1 (en) Device and method for dewatering a material web
EP1992736B1 (en) Press assembly
EP1420111B1 (en) Pressing arrangement
DE4335024C2 (en) Press section of a paper machine and transfer device
EP0689627A1 (en) Traction-free web transport in a compression section
DE4402513A1 (en) Press section of a paper machine
DE4321402A1 (en) Paper-making machine press section - has a smooth continuous surface as final unit to transfer web onwards in the prodn. of thin paper
DE10314296A1 (en) Web transfer between a fourdrinier and a blanket, at the press section of a machine for the production/finishing of paper/cardboard/tissue, takes the full uncut web width at a suction cylinder with pressure at the web edges
DE69814929T2 (en) PRESS DEVICE
DE202005020882U1 (en) Dewatering and drying station for paper mill, e.g. for carton, paper or tissue paper has nip gap formed by drying cylinder and smoothing drum
WO2006021500A1 (en) Machine and method for the production of a web of fiber material with an increased volume

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: 19941224

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT DE ES FR GB IT SE

17Q First examination report despatched

Effective date: 19951222

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

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 DE ES FR GB IT SE

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 FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19970730

Ref country code: FR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19970730

REF Corresponds to:

Ref document number: 156208

Country of ref document: AT

Date of ref document: 19970815

Kind code of ref document: T

REF Corresponds to:

Ref document number: 59403546

Country of ref document: DE

Date of ref document: 19970904

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

Effective date: 19970814

ET Fr: translation filed
ITF It: translation for a ep patent filed

Owner name: STUDIO TORTA S.R.L.

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2105720

Country of ref document: ES

Kind code of ref document: T3

PLBQ Unpublished change to opponent data

Free format text: ORIGINAL CODE: EPIDOS OPPO

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

26 Opposition filed

Opponent name: VALMET-KARLSTAD AB

Effective date: 19980311

PLBF Reply of patent proprietor to notice(s) of opposition

Free format text: ORIGINAL CODE: EPIDOS OBSO

PLBF Reply of patent proprietor to notice(s) of opposition

Free format text: ORIGINAL CODE: EPIDOS OBSO

PLBF Reply of patent proprietor to notice(s) of opposition

Free format text: ORIGINAL CODE: EPIDOS OBSO

PLAW Interlocutory decision in opposition

Free format text: ORIGINAL CODE: EPIDOS IDOP

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

Ref country code: GB

Payment date: 20000427

Year of fee payment: 7

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: 20001102

AK Designated contracting states

Kind code of ref document: B2

Designated state(s): AT DE ES FR GB IT SE

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

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20010213

EN Fr: translation not filed
GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]

Effective date: 19970730

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

Ref country code: FR

Payment date: 20010518

Year of fee payment: 8

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

Ref country code: DE

Payment date: 20010613

Year of fee payment: 8

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

Ref country code: ES

Payment date: 20020513

Year of fee payment: 9

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

Ref country code: AT

Payment date: 20020522

Year of fee payment: 9

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

Ref country code: SE

Payment date: 20020524

Year of fee payment: 9

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: 20021203

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

Ref country code: AT

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

Effective date: 20030527

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: 20030528

EUG Se: european patent has lapsed
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;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050527