EP1925723B1 - Tissue paper machine - Google Patents

Tissue paper machine Download PDF

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Publication number
EP1925723B1
EP1925723B1 EP20070120951 EP07120951A EP1925723B1 EP 1925723 B1 EP1925723 B1 EP 1925723B1 EP 20070120951 EP20070120951 EP 20070120951 EP 07120951 A EP07120951 A EP 07120951A EP 1925723 B1 EP1925723 B1 EP 1925723B1
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EP
European Patent Office
Prior art keywords
press roll
adjusting unit
machine according
operating position
piston rod
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP20070120951
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German (de)
French (fr)
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EP1925723A1 (en
Inventor
Christian Schmid
Andreas Meschenmoser
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Voith Patent GmbH
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Voith Patent GmbH
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Publication date
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Publication of EP1925723A1 publication Critical patent/EP1925723A1/en
Application granted granted Critical
Publication of EP1925723B1 publication Critical patent/EP1925723B1/en
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    • 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
    • D21F3/06—Means for regulating the pressure
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus
    • D21G1/002—Opening or closing mechanisms; Regulating the pressure

Definitions

  • the invention relates to a machine for producing or processing a material web, in particular paper, board or tissue web, with a press unit according to the preamble of patent claim 1.
  • Tissue paper machines for example, comprise a press unit formed by a press roll and a counterpressure roll formed as a drying cylinder, in which often the press roll is pivotally mounted on a bearing lever relative to the press roll, so that the press roll is moved between an operating position, in the the press roll is pressed against the counter press roll, and a non-operating position in which the press roll is not pressed against the counter press roll, is movable.
  • the adjusting unit is designed as a hydraulic cylinder.
  • the storage lever in the operating position must be permanently supported by the hydraulic pressure in the hydraulic cylinder in order to achieve the required contact pressure of the press roll to the counterpressure roll.
  • the disadvantage of such a press unit known from the prior art is that a high mechanical holding force has to be permanently applied by the hydraulic cylinder during operation.
  • the exact operating position is not reproducible adjustable and must therefore be constantly adjusted by means of complex control systems.
  • Such a press unit of a machine for producing or processing a material web, comprising a press roll designed as a suction press roll and a counterpressure roll is disclosed in the document DE 15 61 700 A1 known. The press roll is mounted on a pivotable bearing lever.
  • Adjustment unit By means of at least one acting on the bearing lever Adjustment unit can this between an operating position in which the press roller is pressed against the counter-pressure roller, and a position outside the operating position in which the press roller is not pressed against the counter-pressure roller, are moved.
  • This embodiment is an application in a dryer in which the press roll is set against a drying cylinder.
  • the press roller is hinged to the support frame of the drying cylinder.
  • the suspension are associated with means for generating the pressing pressure, in particular pressure cylinder.
  • the adjustment means comprising said devices must be designed in such a way that it is both suitable for generating and / or supporting the corresponding pressing and holding forces, and also for positioning the press roll relative to the counter roll. It requires the exact location fixation of a considerable control effort due to the continuously required pressurization of the facilities and also a corresponding structural design of these in order to transmit the required forces.
  • the machine according to the invention for producing or processing a material web, in particular paper, board or tissue web has a press unit comprising at least one press roll and a counter press roll, wherein the press roll is mounted on a pivotable support lever and by means of at least one adjustment unit acting on the support lever between an operating position in which the press roll is pressed against the counter press roll, and a non-operating position in which the press roll is not pressed against the counter press roll, is movable.
  • the machine according to the invention is characterized in that the press roll (3) is a shoe press roll and the at least one adjusting unit comprises a locking device by means of which the adjusting unit is mechanically lockable in the operating position.
  • the mechanical lock produced by the locking device can be released again in order to be restored at a later point in time when the press roll is again pivoted into the operating position.
  • an adjusting unit comprising a locking device by means of which the adjusting unit can be mechanically locked in the operating position
  • the hydraulic cylinder is relieved during operation and thus the operating line force is not exceeded by the oil pressure Hydraulic cylinder must be supported.
  • the use of a complex and stiff on the machine chair directly mounted locking lever is avoided.
  • the operating position comprises a plurality of operating positions in which the press roller and the counter-pressure roller are each pressed to different degrees against each other, wherein the locking device is designed such that the adjustment is mechanically locked in each of the different operating positions.
  • an embodiment of the invention provides that the adjustment unit has a hydraulic cylinder with a cylinder wall and a movable piston rod in the longitudinal extent of the cylinder, wherein a releasable mechanical locking between the wall and the piston rod is mediated by the locking device.
  • the locking device is arranged within the adjustment, the way to lock and unlock is small whereby the locking and unlocking can be made quickly.
  • the locking device is encapsulated in the hydraulic cylinder, whereby a functional impairment is prevented by contamination.
  • the locking device has a circumferentially extending piston rod at least partially extending groove or bead and mounted on the cylinder engaging member, wherein the engagement member is movable relative to the piston rod so that this in the operating position to effect locking with the groove or bead is positively engageable engageable.
  • the engagement element is movable substantially perpendicular to the direction of movement of the piston rod.
  • the engagement element may be formed by one or more annular segments which are complementary in shape to the groove or bead.
  • the adjusting unit comprises a mechanical spindle gear.
  • a further particularly preferred embodiment of the invention provides that the storage lever is mounted in the region of its one longitudinal end about an axis rotatably mounted on the machine frame and that the adjustment acts on the storage lever at a location in the region of its other longitudinal end.
  • the axis of rotation of the press roll is arranged closer to the axis of rotation of the bearing lever as the adjusting unit on the axis of rotation of the bearing lever.
  • the adjusting unit has a larger lever than the press roller with respect to the axis of rotation of the bearing lever with the advantageous result that both the holding force in the operating position and the force for pivoting the press roller to and from the counter press roller over the prior art are significantly reduced can. Therefore, the adjustment can be made smaller, which brings cost advantages.
  • the counterpressure roll may be a drying cylinder, in particular a Yankee drying cylinder.
  • the drying cylinder is heated, so that a tear of the paper web leads to a direct contact between the plastic shell of the press roll and the counterpressure roll designed as a drying cylinder, which can result in damage to the plastic shell of the press roll.
  • the FIG. 1 shows a tissue machine 1 according to the prior art.
  • the tissue paper machine 1 has a press unit which comprises a counterpressure roller designed as a Yankee drying cylinder 2 (hatched, partially covered by machine stools) and a press roller designed as a shoe press roller 3.
  • the shoe press roll 3 is rotatably mounted on an L-shaped support lever 4 about its axis of rotation 5, which in turn is mounted rotatably about the axis 7 on the machine frame 6.
  • an acting on the support lever 4 and designed as a hydraulic cylinder adjustment 8 By means of an acting on the support lever 4 and designed as a hydraulic cylinder adjustment 8, the shoe press roll 3 between an operating position in which it is pressed against the Yankee drying cylinder 2, and a non-operating position in which the shoe press roll 3 is not pressed against the Yankee drying cylinder 2 is to be moved.
  • a press nip 9 is formed between the shoe press roll 3 and the Yankee drying cylinder 2, through which a tissue paper web 10 is guided.
  • the adjusting unit 8 When in the FIG. 1 1, the adjusting unit 8 has no locking device for the mechanical locking of the adjusting unit 8 in the operating position. Furthermore, there is an unfavorable lever ratio between the point of application of the adjusting unit 8 and the axis of rotation 5 of the shoe press roll 3, since the adjustment 8 engages closer to the axis of rotation 7 of the bearing lever 4 as the axis of rotation 5 of the shoe press roll 3 is removed from the axis of rotation 7.
  • the FIG. 2 shows a further paper machine 11.
  • the tissue paper machine 11 has a press unit, which as a Yankee drying cylinder 2 (hatched drawn, as partially covered by machine chair) formed counterpressure roller and formed as a shoe press roll 3 press roll.
  • the shoe press roll 3 is rotatably mounted on a linear bearing lever 12 about its axis of rotation 5, which in turn is mounted rotatably about the axis 7 on the machine frame 6.
  • an acting on the bearing lever 12 and designed as a hydraulic cylinder adjustment 8 By means of an acting on the bearing lever 12 and designed as a hydraulic cylinder adjustment 8, the shoe press roll 3 between an operating position in which it is pressed against the Yankee drying cylinder 2, and a non-operating position in which the shoe press roll 3 is not pressed against the Yankee drying cylinder 2 is to be moved.
  • a press nip 9 is formed between the shoe press roll 3 and the Yankee drying cylinder 2, through which a tissue paper web 10 is guided.
  • the adjusting unit 8 no locking device for mechanical locking of the adjusting unit 8 in the operating position.
  • the shoe press roll 3 is rather held in the operating position by means of a locking projection 13, which is pivotably mounted on the machine frame 6 and which can be actuated via an adjusting unit 14 and can be pivoted on and off for locking.
  • a locking projection 13 which is pivotably mounted on the machine frame 6 and which can be actuated via an adjusting unit 14 and can be pivoted on and off for locking.
  • the FIG. 3 shows a paper machine 14 according to the invention.
  • the tissue paper machine 14 has a press unit which comprises a Yankee drying cylinder 2 (hatched, partially covered by machine chairs) formed counterpressure roller and formed as a shoe press roll 3 press roll.
  • a press unit which comprises a Yankee drying cylinder 2 (hatched, partially covered by machine chairs) formed counterpressure roller and formed as a shoe press roll 3 press roll.
  • the shoe press roll could alternatively be provided a cylinder press roll.
  • the shoe press roll 3 is rotatably mounted on a linear support lever 15 about its axis of rotation 5, which in turn is mounted rotatably about the axis 7 on the machine frame 6.
  • the adjusting unit 16 is in cross section in FIG. 4 shown. This comprises a hydraulic cylinder 17 with a cylinder wall 18 and a longitudinal extent of the cylinder wall by pressurization in the pressure chamber 23 movable piston rod 19. The free end of the piston rod 19 -that which looks out of the cylinder wall engages the bearing lever 15, while the cylinder wall 18 indirectly or directly supported on the machine frame 6.
  • the adjusting unit 16 further comprises a locking device, by means of which the adjusting unit 16 is mechanically locked in an operating position, wherein a mechanical locking between the wall 18 and the piston rod 19 is mediated by the locking device.
  • the locking device comprises a circumferential groove 20 in the circumferential direction of the piston rod 20 and an inner cylinder wall 18 mounted and formed by a plurality of groove 20 complementary complementary ring segments 21 engagement element which are perpendicular to the direction of movement of the piston rod 19 movable so that they are in the operating position for Actuation of the lock with the groove 21 are positively engageable engageable.
  • the reciprocating motion of the ring segments 21 can be effected by alternately pressurizing the ring segments 21 with hydraulic fluid 22 (the solid line shows the ring segments 21 in the locking position, whereas the broken line shows the ring segments in the unlocked position of the adjusting unit 16).
  • the leadership of the ring segments 21 in their movement is accomplished by guide elements 23.
  • piston rod 19 a plurality of longitudinal grooves arranged in the longitudinal direction of the piston rod 19 so that several operating positions can be assumed in the operating position in which the shoe press roll 3 and the Yankee drying cylinder 2 are pressed against each other to different degrees are and the piston rod 19 is mechanically locked in each of the different operating positions relative to the cylinder wall 18.
  • the storage lever 15 is rotatably mounted in the region of its one longitudinal end on the machine frame 6 and that the adjusting unit 16 acts on the storage lever 15 in the region of its other longitudinal end.
  • the FIG. 3 can be seen that the rotation axis 5 of the press roller 3 is arranged closer than the adjusting unit 16 on the axis of rotation 7 of the bearing lever 15.

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Description

Die Erfindung betrifft eine Maschine zur Herstellung oder Verarbeitung einer Materialbahn, insbesondere Papier-, Karton- oder Tissuebahn, mit einer Presseneinheit nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a machine for producing or processing a material web, in particular paper, board or tissue web, with a press unit according to the preamble of patent claim 1.

Tissuepapiermaschinen weisen beispielsweise eine durch eine Presswalze und eine als Trockenzylinder ausgebildete Gegenpresswalze gebildete Presseneinheit auf, bei welcher oftmals die Presswalze an einem Lagerungshebel relativ zur Gegenpresswalze schwenkbar gelagert ist, so dass die Presswalze mittels zumindest einer auf den Lagerungshebel einwirkenden Verstelleinheit zwischen einer Betriebsposition, in der die Presswalze gegen die Gegenpresswalze gepresst ist, und einer Außerbetriebsposition, in der die Presswalze nicht gegen die Gegenpresswalze gepresst ist, bewegbar ist. In der Regel ist die Verstelleinheit als Hydraulikzylinder ausgebildet.Tissue paper machines, for example, comprise a press unit formed by a press roll and a counterpressure roll formed as a drying cylinder, in which often the press roll is pivotally mounted on a bearing lever relative to the press roll, so that the press roll is moved between an operating position, in the the press roll is pressed against the counter press roll, and a non-operating position in which the press roll is not pressed against the counter press roll, is movable. As a rule, the adjusting unit is designed as a hydraulic cylinder.

Bei den aus dem Stand der Technik bekannten Presseneinheiten muss der Lagerungshebel in der Betriebsposition permanent durch den hydraulischen Druck im Hydraulikzylinder abgestützt werden, um die erforderliche Anpressung der Presswalze an die Gegenpresswalze zu bewerkstelligen. Der Nachteil einer solchen aus dem Stand der Technik bekannten Presseneinheit besteht darin, dass während des Betriebs permanent durch den Hydraulikzylinder eine hohe mechanische Haltekraft aufgebracht werden muss. Zudem ist die exakte Betriebsposition nicht reproduzierbar einstellbar und muss daher ständig mittels aufwändiger Regelsysteme nachgestellt werden. Eine derartige Presseneinheit einer Maschine zur Herstellung oder Verarbeitung einer Materialbahn, umfassend eine als Saugpresswalze ausgeführte Presswalze und eine Gegenpresswalze ist aus der Druckschrift DE 15 61 700 A1 bekannt. Die Presswalze ist an einem schwenkbaren Lagerungshebel gelagert. Mittels zumindest einer auf den Lagerungshebel einwirkenden Verstelleinheit kann diese zwischen einer Betriebsposition, in welcher die Presswalze gegen die Gegenpresswalze gepresst ist, und einer Position außerhalb der Betriebsposition, in der die Presswalze nicht gegen die Gegenpresswalze gepresst ist, bewegt werden. Bei dieser Ausführung handelt es sich um eine Anwendung in einer Trockenvorrichtung, bei welcher die Presswalze gegen einen Trockenzylinder angestellt wird. Die Presswalze ist dazu am Traggestell des Trockenzylinders angelenkt. Der Aufhängung sind Einrichtungen zum Erzeugen des Pressdruckes, insbesondere Druckzylinder zugeordnet. Mittels dieser Einrichtungen wird die Presswalze mit der erforderlichen Anpresskraft gegen den Trockenzylinder angepresst, andererseits aber auch gegenüber diesem positioniert, d.h. angestellt und abgehoben. Dazu muss die, die genannten Einrichtungen umfassende Verstelleinheit derart ausgeführt werden, dass diese sowohl geeignet ist, zum einen die entsprechenden Anpress- und Haltekräfte zu erzeugen beziehungsweise abzustützen, und ferner die Presswalze gegenüber der Gegenwalze zu positionieren. Dabei bedarf es zur genauen Lagefixierung eines erheblichen Steuerungsaufwandes aufgrund der fortlaufend erforderlichen Druckbeaufschlagung der Einrichtungen und ferner einer entsprechenden konstruktiven Auslegung dieser, um die erforderlichen Kräfte übertragen zu können.In the press units known from the prior art, the storage lever in the operating position must be permanently supported by the hydraulic pressure in the hydraulic cylinder in order to achieve the required contact pressure of the press roll to the counterpressure roll. The disadvantage of such a press unit known from the prior art is that a high mechanical holding force has to be permanently applied by the hydraulic cylinder during operation. In addition, the exact operating position is not reproducible adjustable and must therefore be constantly adjusted by means of complex control systems. Such a press unit of a machine for producing or processing a material web, comprising a press roll designed as a suction press roll and a counterpressure roll is disclosed in the document DE 15 61 700 A1 known. The press roll is mounted on a pivotable bearing lever. By means of at least one acting on the bearing lever Adjustment unit can this between an operating position in which the press roller is pressed against the counter-pressure roller, and a position outside the operating position in which the press roller is not pressed against the counter-pressure roller, are moved. This embodiment is an application in a dryer in which the press roll is set against a drying cylinder. The press roller is hinged to the support frame of the drying cylinder. The suspension are associated with means for generating the pressing pressure, in particular pressure cylinder. By means of these facilities, the press roller is pressed against the drying cylinder with the required contact force, on the other hand, but also positioned opposite this, ie hired and lifted. For this purpose, the adjustment means comprising said devices must be designed in such a way that it is both suitable for generating and / or supporting the corresponding pressing and holding forces, and also for positioning the press roll relative to the counter roll. It requires the exact location fixation of a considerable control effort due to the continuously required pressurization of the facilities and also a corresponding structural design of these in order to transmit the required forces.

Des weiteren sind aus dem Stand der Technik Presseneinheiten bekannt bei denen der Lagerungshebel in der Betriebsposition mittels einem an der Maschinenstuhlung drehbar gelagerten Arretierungshebel in der Betriebsposition gehalten wird, um den Hydraulikzylinder zu entlasten, so dass die Haltekraft während des Betriebs der Presseneinheit nicht vom Hydraulikzylinder sondern durch den Arretierungshebel aufgebracht wird. Nachteil einer solchen Anordnung ist, dass zur Verlagerung der Presswalze aus der Betriebsposition in die Außerbetriebsposition und umgekehrt jeweils der schwergewichtige Arretierungshebel aus der bzw. in die Verriegelungsstellung geschwenkt werden muss, was zum einen oftmals zeitraubend ist und ein schnelles Trennen des Kontakts zwischen Presswalze und Gegenpresswalze verhindert und so bspw. bei einem Riss der Papierbahn zu einer Beschädigung des Kunststoffmantels der Presswalze führen kann, wenn die Gegenpresswalze durch einen heißen Trockenzylinder gebildet wird. Des weiteren erfordert das jeweilige Aus- bzw. Einschwenken des Arretierungshebels einen erhöhten Steuerungsaufwand.Furthermore, from the prior art press units are known in which the bearing lever is held in the operating position by means of a rotatably mounted on the machine frame locking lever in the operating position to relieve the hydraulic cylinder, so that the holding force during operation of the Press unit is not applied by the hydraulic cylinder but by the locking lever. Disadvantage of such an arrangement is that the displacement of the press roller from the operating position to the inoperative position and vice versa each of the heavy-weight locking lever must be pivoted out of or into the locking position, which is often time-consuming and a rapid separation of the contact between the press roll and the counterpressure roll prevented and thus, for example, in a crack of the paper web can lead to damage of the plastic shell of the press roll when the counter-pressure roller is formed by a hot drying cylinder. Furthermore, the respective swinging out or pivoting of the locking lever requires increased control effort.

Es ist die Aufgabe der vorliegenden Erfindung eine Maschine der Eingangs genannten Art vorzuschlagen, bei der die oben genannten Nachteile behoben sind, d.h. bei der zum Einen die exakte Betriebsposition ohne ständige Kraftbeaufschlagung der Verstelleinheit gehalten werden kann und dennoch auf den aufwändigen Verriegelungsmechanismus mittels Arretierungshebel verzichtet werden kann.It is the object of the present invention to propose a machine of the type mentioned above, in which the above-mentioned disadvantages are eliminated, i. in the one hand, the exact operating position can be maintained without constant application of force to the adjustment and yet can be dispensed with the elaborate locking mechanism by means of locking lever.

Die Aufgabe wird durch die Merkmale des Patentanspruchs 1 gelöst.The object is solved by the features of patent claim 1.

Die erfindungsgemäße Maschine zur Herstellung oder Verarbeitung einer Materialbahn, insbesondere Papier-, Karton- oder Tissuebahn, weist eine durch zumindest eine Presswalze und eine Gegenpresswalze umfassenden Presseneinheit auf, wobei die Presswalze an einem schwenkbaren Lagerungshebel gelagert ist und mittels zumindest einer auf den Lagerungshebel einwirkenden Verstelleinheit zwischen einer Betriebsposition, in der die Presswalze gegen die Gegenpresswalze gepresst ist, und einer Außerbetriebsposition, in der die Presswalze nicht gegen die Gegenpresswalze gepresst ist, bewegbar ist. Die erfindungsgemäße Maschine ist dadurch gekennzeichnet, dass die Presswalze (3) eine Schuhpresswalze ist und die zumindest eine Verstelleinheit eine Verriegelungseinrichtung umfasst, mittels der die Verstelleinheit in der Betriebsposition mechanisch arretierbar ist.The machine according to the invention for producing or processing a material web, in particular paper, board or tissue web, has a press unit comprising at least one press roll and a counter press roll, wherein the press roll is mounted on a pivotable support lever and by means of at least one adjustment unit acting on the support lever between an operating position in which the press roll is pressed against the counter press roll, and a non-operating position in which the press roll is not pressed against the counter press roll, is movable. The machine according to the invention is characterized in that the press roll (3) is a shoe press roll and the at least one adjusting unit comprises a locking device by means of which the adjusting unit is mechanically lockable in the operating position.

Soll die Presswalze von der Betriebsposition in die Außerbetriebsposition geschwenkt werden, kann die durch die Verriegelungseinrichtung hergestellte mechanische Arretierung selbstverständlich wieder gelöst werden um zu einem späteren Zeitpunkt, wenn die Presswalze wieder in die Betriebsposition geschwenkt ist, wieder hergestellt zu werden.Of course, if the press roll is to be pivoted from the operating position to the non-operating position, the mechanical lock produced by the locking device can be released again in order to be restored at a later point in time when the press roll is again pivoted into the operating position.

Durch die Bereitstellung einer eine Verriegelungseinrichtung umfassenden Verstelleinheit, mittels der die Verstelleinheit in der Betriebsposition mechanisch arretierbar ist, wird zum einerseits erreicht, dass bspw. bei einer einen Hydraulikzylinder umfassenden Verstelleinheit der Hydraulikzylinder während des Betriebs entlastet wird und somit die Betriebslinienkraft nicht über den Öldruck der Hydraulikzylinder abgestützt werden muss. Andererseits wird die Verwendung eines aufwändigen und schwergängigen an der Maschinenstuhlung direkt gelagerten Arretierungshebels vermieden.By providing an adjusting unit comprising a locking device by means of which the adjusting unit can be mechanically locked in the operating position, on the one hand it is achieved that, for example, in an adjusting unit comprising a hydraulic cylinder, the hydraulic cylinder is relieved during operation and thus the operating line force is not exceeded by the oil pressure Hydraulic cylinder must be supported. On the other hand, the use of a complex and stiff on the machine chair directly mounted locking lever is avoided.

Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen angegeben.Advantageous embodiments of the invention are specified in the subclaims.

Gemäß einer bevorzugten Ausgestaltung der Maschine ist vorgesehen, dass die Betriebsposition mehrere Betriebsstellungen umfasst, in denen die Presswalze und Gegenpresswalze jeweils unterschiedlich stark gegeneinander gepresst sind, wobei die Verriegelungseinrichtung derart ausgebildet ist, dass die Verstelleinheit in jeder der verschiedenen Betriebsstellungen mechanisch arretierbar ist. Hierdurch kann die erfindungsgemäße Maschine bei unterschiedlichen Liniendrücken zwischen den Walzen betrieben werden.According to a preferred embodiment of the machine is provided that the operating position comprises a plurality of operating positions in which the press roller and the counter-pressure roller are each pressed to different degrees against each other, wherein the locking device is designed such that the adjustment is mechanically locked in each of the different operating positions. As a result, the machine according to the invention can be operated at different line pressures between the rollers.

Eine Ausgestaltung der Erfindung sieht vor, dass die Verstelleinheit einen Hydraulikzylinder mit einer Zylinderwandung und eine in Längserstreckung der Zylinderwandung bewegbare Kolbenstange hat, wobei durch die Verriegelungseinrichtung eine lösbare mechanische Arretierung zwischen Wandung und Kolbenstange vermittelt wird. Hierdurch wird eine besonders kompakte, unempfindliche und kostengünstige Verstelleinheit zur Verfügung gestellt. Dadurch dass die Verriegelungseinrichtung innerhalb der Verstelleinheit angeordnet ist, ist der Weg zur Ver- und Entriegelung klein wodurch die Ver- und Entriegelung schnell hergestellt werden kann. Des weiteren ist die Verriegelungseinrichtung in dem Hydraulikzylinder eingekapselt, wodurch eine Funktionsbeeinträchtigung durch Verschmutzung unterbunden wird.An embodiment of the invention provides that the adjustment unit has a hydraulic cylinder with a cylinder wall and a movable piston rod in the longitudinal extent of the cylinder, wherein a releasable mechanical locking between the wall and the piston rod is mediated by the locking device. As a result, a particularly compact, insensitive and cost-effective adjustment is provided. The fact that the locking device is arranged within the adjustment, the way to lock and unlock is small whereby the locking and unlocking can be made quickly. Furthermore, the locking device is encapsulated in the hydraulic cylinder, whereby a functional impairment is prevented by contamination.

Nach einer konkreten Ausführungsform weist die Verriegelungseinrichtung eine sich in Umfangrichtung der Kolbenstange zumindest abschnittweise erstreckende Nut oder Wulst sowie ein an der Zylinderwandung gelagert Eingriffselement auf, wobei das Eingriffselement relativ zur Kolbenstange derart bewegbar ist, dass dieses in der Betriebsposition zur Bewirkung der Arretierung mit der Nut oder Wulst formschlüssig in Eingriff bringbar ist. Vorzugsweise ist hierbei das Eingriffselement im wesentlichen senkrecht zur Bewegungsrichtung der Kolbenstange bewegbar. Des weiteren kann das Eingriffselement durch ein oder mehrere zur Nut oder Wulst formkomplementär ausgebildete Ringsegmente gebildet ist. Hierdurch wird eine einfach aufgebaute Verriegelungseinheit zur Verfügung gestellt, welche kostengünstig herzustellen und wartungsfreundlich ist.According to a specific embodiment, the locking device has a circumferentially extending piston rod at least partially extending groove or bead and mounted on the cylinder engaging member, wherein the engagement member is movable relative to the piston rod so that this in the operating position to effect locking with the groove or bead is positively engageable engageable. Preferably, in this case, the engagement element is movable substantially perpendicular to the direction of movement of the piston rod. Furthermore, the engagement element may be formed by one or more annular segments which are complementary in shape to the groove or bead. As a result, a simple design locking unit is provided, which is inexpensive to manufacture and easy to maintain.

Gemäß einer alternativen Ausgestaltung der Erfindung ist vorgesehen, dass die Verstelleinheit ein mechanisches Spindelgetriebe umfasst.According to an alternative embodiment of the invention it is provided that the adjusting unit comprises a mechanical spindle gear.

Eine weitere besonders bevorzugte Ausführungsform der Erfindung sieht vor, dass der Lagerungshebel im Bereich seines einen längsseitigen Endes um eine Achse drehbar an der Maschinenstuhlung gelagert ist und dass die Verstelleinheit auf den Lagerungshebel an einer Stelle im Bereich seines anderen längsseitigen Endes einwirkt. Vorzugsweise ist hierbei die Rotationsachse der Presswalze näher an der Drehachse des Lagerungshebels als die Verstelleinheit an der Drehachse des Lagerungshebels angeordnet ist. Hierdurch hat die Verstelleinheit einen größeren Hebel als die Presswalze in Bezug zur Drehachse des Lagerungshebels mit dem vorteilhaften Ergebnis, dass sowohl die Haltekraft in der Betriebsposition als auch die Kraft zum An- und Abschwenken der Presswalze an die Gegenpresswalze gegenüber dem Stand der Technik deutlich reduziert werden kann. Daher kann die Verstelleinheit kleiner dimensioniert werden, was Kostenvorteile mit sich bringt.A further particularly preferred embodiment of the invention provides that the storage lever is mounted in the region of its one longitudinal end about an axis rotatably mounted on the machine frame and that the adjustment acts on the storage lever at a location in the region of its other longitudinal end. Preferably, in this case the axis of rotation of the press roll is arranged closer to the axis of rotation of the bearing lever as the adjusting unit on the axis of rotation of the bearing lever. As a result, the adjusting unit has a larger lever than the press roller with respect to the axis of rotation of the bearing lever with the advantageous result that both the holding force in the operating position and the force for pivoting the press roller to and from the counter press roller over the prior art are significantly reduced can. Therefore, the adjustment can be made smaller, which brings cost advantages.

Die vorstehend beschriebene Erfindung findet bevorzugt aber nicht ausschließlich in Tissuepapiermaschinen Verwendung. Dabei kann die Gegenpresswalze ein Trockenzylinder, insbesondere ein Yankee-Trockenzylinder sein. Wie bereits einleitend beschrieben, ist der Trockenzylinder beheizt, sodass ein Abriss der Papierbahn zu einem direkten Kontakt zwischen dem Kunststoffmantel der Presswalze und der als Trockenzylinder ausgebildeten Gegenpresswalze führt, was eine Beschädigung des Kunststoffmantel der Presswalze zur Folge haben kann. Durch die erfindungsgemäße Lösung kann bei der o.g. Konfiguration die Presswalze schnell von dem Trockenzylinder an- bzw. abgeschwenkt werden.The invention described above is preferably but not exclusively used in tissue paper machines. In this case, the counterpressure roll may be a drying cylinder, in particular a Yankee drying cylinder. As already described in the introduction, the drying cylinder is heated, so that a tear of the paper web leads to a direct contact between the plastic shell of the press roll and the counterpressure roll designed as a drying cylinder, which can result in damage to the plastic shell of the press roll. By the solution according to the invention, in the above-mentioned configuration, the press roll can be quickly swiveled in or out of the drying cylinder.

Nachfolgend soll die Erfindung anhand der folgenden nicht maßstäblichen Zeichnungen näher erläutert werden. Es zeigen:

Fig. 1
eine Tissuepapiermaschine nach dem Stand der Technik in Seitenansicht,
Fig. 2
eine weitere Tissuepapiermaschine nach dem Stand der Technik in Seitenansicht,
Fig. 3
eine erfindungsgemäße Tissuepapiermaschine in Seitenansicht,
Fig. 4
eine Verstelleinheit der erfindungsgemäße Tissuepapiermaschine.
The invention will be explained in more detail with reference to the following non-scale drawings. Show it:
Fig. 1
a tissue paper machine according to the prior art in side view,
Fig. 2
another tissue paper machine according to the prior art in side view,
Fig. 3
a tissue paper machine according to the invention in side view,
Fig. 4
an adjusting unit of the tissue paper machine according to the invention.

Die Figur 1 zeigt eine Tissuepapiermaschine 1 nach dem Stand der Technik. Die Tisssuepapiermaschine 1 weist eine Presseneinheit auf, welche eine als Yankee-Trockenzylinder 2 (schraffiert gezeichnet, da teilweise von Maschinenstuhlung verdeckt) ausgebildete Gegenpresswalze und eine als Schuhpresswalze 3 ausgebildete Presswalze umfasst. Die Schuhpresswalze 3 ist an einem L-förmigen Lagerungshebel 4 um ihre Drehachse 5 drehbar gelagert, welcher wiederum drehbar um die Achse 7 an der Maschinenstuhlung 6 gelagert ist. Mittels einer auf den Lagerungshebel 4 einwirkenden und als Hydraulikzylinder ausgebildeten Verstelleinheit 8 kann die Schuhpresswalze 3 zwischen einer Betriebsposition, in der diese gegen den Yankee-Trockenzylinder 2 gepresst ist, und einer Außerbetriebsposition, in der die Schuhpresswalze 3 nicht gegen den Yankee-Trockenzylinder 2 gepresst ist, bewegt werden. Im Betriebszustands wird zwischen der Schuhpresswalze 3 und dem Yankee-Trockenzylinder 2 ein Pressnip 9 gebildet, durch welchen eine Tissuepapierbahn 10 geführt wird.The FIG. 1 shows a tissue machine 1 according to the prior art. The tissue paper machine 1 has a press unit which comprises a counterpressure roller designed as a Yankee drying cylinder 2 (hatched, partially covered by machine stools) and a press roller designed as a shoe press roller 3. The shoe press roll 3 is rotatably mounted on an L-shaped support lever 4 about its axis of rotation 5, which in turn is mounted rotatably about the axis 7 on the machine frame 6. By means of an acting on the support lever 4 and designed as a hydraulic cylinder adjustment 8, the shoe press roll 3 between an operating position in which it is pressed against the Yankee drying cylinder 2, and a non-operating position in which the shoe press roll 3 is not pressed against the Yankee drying cylinder 2 is to be moved. In the operating state, a press nip 9 is formed between the shoe press roll 3 and the Yankee drying cylinder 2, through which a tissue paper web 10 is guided.

Bei der in der Figur 1 gezeigten Papiermaschine 1 weist die Verstelleinheit 8 keine Verriegelungseinrichtung zur mechanische Arretierung der Verstelleinheit 8 in der Betriebsposition auf. Des weiteren herrscht ein ungünstiges Hebelverhältnis zwischen der Angriffsstelle der Verstelleinheit 8 und der Drehachse 5 der Schuhpresswalze 3, da die Verstelleinheit 8 näher an der Drehachse 7 des Lagerungshebels 4 angreift als die Drehachse 5 der Schuhpresswalze 3 von der Drehachse 7 entfernt ist.When in the FIG. 1 1, the adjusting unit 8 has no locking device for the mechanical locking of the adjusting unit 8 in the operating position. Furthermore, there is an unfavorable lever ratio between the point of application of the adjusting unit 8 and the axis of rotation 5 of the shoe press roll 3, since the adjustment 8 engages closer to the axis of rotation 7 of the bearing lever 4 as the axis of rotation 5 of the shoe press roll 3 is removed from the axis of rotation 7.

Die Figur 2 zeigt eine weitere Papiermaschine 11. Die Tisssuepapiermaschine 11 weist eine Presseneinheit auf, welche eine als Yankee-Trockenzylinder 2 (schraffiert gezeichnet, da teilweise von Maschinenstuhlung verdeckt) ausgebildete Gegenpresswalze und eine als Schuhpresswalze 3 ausgebildete Presswalze umfasst. Die Schuhpresswalze 3 ist an einem linearen Lagerungshebel 12 um ihre Drehachse 5 drehbar gelagert, welcher wiederum drehbar um die Achse 7 an der Maschinenstuhlung 6 gelagert ist. Mittels einer auf den Lagerungshebel 12 einwirkenden und als Hydraulikzylinder ausgebildeten Verstelleinheit 8 kann die Schuhpresswalze 3 zwischen einer Betriebsposition, in der diese gegen den Yankee-Trockenzylinder 2 gepresst ist, und einer Außerbetriebsposition, in der die Schuhpresswalze 3 nicht gegen den Yankee-Trockenzylinder 2 gepresst ist, bewegt werden. Im Betriebszustands wird zwischen der Schuhpresswalze 3 und dem Yankee-Trockenzylinder 2 ein Pressnip 9 gebildet, durch welchen eine Tissuepapierbahn 10 geführt wird.The FIG. 2 shows a further paper machine 11. The tissue paper machine 11 has a press unit, which as a Yankee drying cylinder 2 (hatched drawn, as partially covered by machine chair) formed counterpressure roller and formed as a shoe press roll 3 press roll. The shoe press roll 3 is rotatably mounted on a linear bearing lever 12 about its axis of rotation 5, which in turn is mounted rotatably about the axis 7 on the machine frame 6. By means of an acting on the bearing lever 12 and designed as a hydraulic cylinder adjustment 8, the shoe press roll 3 between an operating position in which it is pressed against the Yankee drying cylinder 2, and a non-operating position in which the shoe press roll 3 is not pressed against the Yankee drying cylinder 2 is to be moved. In the operating state, a press nip 9 is formed between the shoe press roll 3 and the Yankee drying cylinder 2, through which a tissue paper web 10 is guided.

Bei der in der Figur 2 gezeigten Papiermaschine 11 weist die Verstelleinheit 8 keine Verriegelungseinrichtung zur mechanische Arretierung der Verstelleinheit 8 in der Betriebsposition auf. Bei der Tissuepapiermaschine 11 wird die Schuhpresswalze 3 vielmehr über einen schwenkbar an der Maschinenstuhlung 6 gelagerten Arretierungsgebel 13, welcher über eine Verstelleinheit 14 betätigbar ist und zur Arretierung an- und abgeschwenkt werden kann, in der Betriebsposition gehalten. Mit dieser Konfiguration wird zwar die Verstelleinheit 8 während des Betriebs der Presseneinheit entlastet, so dass die Betriebslinienkraft nicht durch den Öldruck des Hydraulikzylinders 8 aufgebracht werden muss, dennoch ist die Konfiguration nachteilig, da sie aufwändig im Betrieb ist. Des weiteren kann bei dieser Konfiguration die Angriffsstelle der Verstelleinheit 8 am Lagerungshebel 12 nicht am äußeren längsseitigen Ende des Lagerungshebels angeordnet sein, da dieser Bereich für den Eingriff des Arretierungshebels 13 zur Verfügung stehen muss.When in the FIG. 2 shown paper machine 11, the adjusting unit 8 no locking device for mechanical locking of the adjusting unit 8 in the operating position. In the tissue paper machine 11, the shoe press roll 3 is rather held in the operating position by means of a locking projection 13, which is pivotably mounted on the machine frame 6 and which can be actuated via an adjusting unit 14 and can be pivoted on and off for locking. With this configuration, while the adjustment unit 8 is relieved during operation of the press unit, so that the operation line force does not have to be applied by the oil pressure of the hydraulic cylinder 8, the configuration is disadvantageous because it is laborious in operation. Furthermore, in this configuration, the point of engagement of the adjusting unit 8 on the bearing lever 12 may not be arranged at the outer longitudinal end of the bearing lever, since this area must be available for the engagement of the locking lever 13.

Die Figur 3 zeigt eine erfindungsgemäße Papiermaschine 14. Die Tisssuepapiermaschine 14 weist eine Presseneinheit auf, welche eine als Yankee-Trockenzylinder 2 (schraffiert gezeichnet, da teilweise von Maschinenstuhlung verdeckt) ausgebildete Gegenpresswalze und eine als Schuhpresswalze 3 ausgebildete Presswalze umfasst. Anstelle der Schuhpresswalze könnte alternativ auch eine Zylinderpresswalze vorgesehen sein. Die Schuhpresswalze 3 ist an einem linearen Lagerungshebel 15 um ihre Drehachse 5 drehbar gelagert, welcher wiederum drehbar um die Achse 7 an der Maschinenstuhlung 6 gelagert ist. Mittels einer auf den Lagerungshebel 15 einwirkenden und einen Hydraulikzylinder sowie eine Verriegelungseinrichtung umfassenden Verstelleinheit 16 kann die Schuhpresswalze 3 zwischen einer Betriebsposition, in der diese gegen den Yankee-Trockenzylinder 2 gepresst ist, und einer Außerbetriebsposition, in der die Schuhpresswalze 3 nicht gegen den Yankee-Trockenzylinder 2 gepresst ist, bewegt werden. Im Betriebszustands wird zwischen der Schuhpresswalze 3 und dem Yankee-Trockenzylinder 2 ein Pressnip 9 gebildet, durch welchen eine Tissuepapierbahn 10 geführt wird.The FIG. 3 shows a paper machine 14 according to the invention. The tissue paper machine 14 has a press unit which comprises a Yankee drying cylinder 2 (hatched, partially covered by machine chairs) formed counterpressure roller and formed as a shoe press roll 3 press roll. Instead of the shoe press roll could alternatively be provided a cylinder press roll. The shoe press roll 3 is rotatably mounted on a linear support lever 15 about its axis of rotation 5, which in turn is mounted rotatably about the axis 7 on the machine frame 6. By means of an acting on the bearing lever 15 and a hydraulic cylinder and a locking device comprising adjusting the shoe press roller 3 between an operating position in which it is pressed against the Yankee drying cylinder 2, and a non-operating position in which the shoe press roll 3 is not against the Yankee Drying cylinder 2 is pressed, to be moved. In the operating state, a press nip 9 is formed between the shoe press roll 3 and the Yankee drying cylinder 2, through which a tissue paper web 10 is guided.

Die Verstelleinheit 16 ist im Querschnitt in Figur 4 dargestellt. Diese umfasst einen Hydraulikzylinder 17 mit einer Zylinderwandung 18 und eine in Längserstreckung der Zylinderwandung durch Druckbeaufschlagung in der Druckkammer 23 bewegbare Kolbenstange 19. Das freie Ende der Kolbenstange 19 -das, welches aus der Zylinderwandung herausschaut- greift am Lagerungshebel 15 an, während sich die Zylinderwandung 18 mittelbar oder unmittelbar an der Maschinenstuhlung 6 abstützt.The adjusting unit 16 is in cross section in FIG. 4 shown. This comprises a hydraulic cylinder 17 with a cylinder wall 18 and a longitudinal extent of the cylinder wall by pressurization in the pressure chamber 23 movable piston rod 19. The free end of the piston rod 19 -that which looks out of the cylinder wall engages the bearing lever 15, while the cylinder wall 18 indirectly or directly supported on the machine frame 6.

Erfindungsgemäß umfasst die Verstelleinheit 16 des weiteren eine Verriegelungseinrichtung, mittels der die Verstelleinheit 16 in einer Betriebsposition mechanisch arretierbar ist, wobei durch die Verriegelungseinrichtung eine mechanische Arretierung zwischen Wandung 18 und Kolbenstange 19 vermittelt wird.According to the invention, the adjusting unit 16 further comprises a locking device, by means of which the adjusting unit 16 is mechanically locked in an operating position, wherein a mechanical locking between the wall 18 and the piston rod 19 is mediated by the locking device.

Vorliegend umfasst die Verriegelungseinrichtung eine in Umfangrichtung der Kolbenstange 19 umlaufende Nut 20 sowie ein an der Zylinderwandung 18 innen gelagertes und durch mehrere zur Nut 20 formkomplementäre Ringsegmente 21 gebildetes Eingriffselement, welche senkrecht zur Bewegungsrichtung der Kolbenstange 19 bewegbar sind, so dass diese in der Betriebsposition zur Bewirkung der Arretierung mit der Nut 21 formschlüssig in Eingriff bringbar sind. Die Hin- und Herbewegung der Ringsegmente 21 kann durch wechselnde Druckbeaufschlagung der Ringsegmente 21 mit Hydraulikflüssigkeit 22 bewirkt werden (die durchgezogene Linie zeigt die Ringsegmente 21 in der Arretierposition, wohingegen die strichlierte Linie die Ringsegmente in nicht arretierten Position der Verstelleinheit 16 zeigt). Die Führung der Ringsegmente 21 bei deren Bewegung wird durch Führungselemente 23 bewerkstelligt.In the present case, the locking device comprises a circumferential groove 20 in the circumferential direction of the piston rod 20 and an inner cylinder wall 18 mounted and formed by a plurality of groove 20 complementary complementary ring segments 21 engagement element which are perpendicular to the direction of movement of the piston rod 19 movable so that they are in the operating position for Actuation of the lock with the groove 21 are positively engageable engageable. The reciprocating motion of the ring segments 21 can be effected by alternately pressurizing the ring segments 21 with hydraulic fluid 22 (the solid line shows the ring segments 21 in the locking position, whereas the broken line shows the ring segments in the unlocked position of the adjusting unit 16). The leadership of the ring segments 21 in their movement is accomplished by guide elements 23.

Nicht dargestellt, aber denkbar wäre, in der Kolbenstange 19 mehrere in Längsrichtung der Kolbenstange 19 hintereinander angeordnete umlaufende Nuten vorzusehen, so dass in der Betriebsposition mehrere Betriebsstellungen eingenommen werden können, in denen die Schuhpresswalze 3 und der Yankee-Trockenzylinder 2 jeweils unterschiedlich stark gegeneinander gepresst sind und die Kolbenstange 19 in jeder der verschiedenen Betriebsstellungen gegenüber der Zylinderwandung 18 mechanisch arretiert ist.Not shown, but it would be conceivable to provide in the piston rod 19 a plurality of longitudinal grooves arranged in the longitudinal direction of the piston rod 19 so that several operating positions can be assumed in the operating position in which the shoe press roll 3 and the Yankee drying cylinder 2 are pressed against each other to different degrees are and the piston rod 19 is mechanically locked in each of the different operating positions relative to the cylinder wall 18.

Durch die Verwendung einer Verstelleinheit 16 mit Verriegelungseinrichtung ist es möglich, dass der Lagerungshebel 15 im Bereich seines einen längsseitigen Endes drehbar an der Maschinenstuhlung 6 gelagert ist und dass die Verstelleinheit 16 auf den Lagerungshebel 15 im Bereich seines anderen längsseitigen Endes einwirkt. Weiter ist der Figur 3 zu entnehmen, dass die Rotationsachse 5 der Presswalze 3 näher als die Verstelleinheit 16 an der Drehachse 7 des Lagerungshebels 15 angeordnet ist.By using an adjusting unit 16 with locking device, it is possible that the storage lever 15 is rotatably mounted in the region of its one longitudinal end on the machine frame 6 and that the adjusting unit 16 acts on the storage lever 15 in the region of its other longitudinal end. Next is the FIG. 3 can be seen that the rotation axis 5 of the press roller 3 is arranged closer than the adjusting unit 16 on the axis of rotation 7 of the bearing lever 15.

Claims (10)

  1. Machine (14) for manufacturing or processing a material web, in particular a paper, cardboard or tissue web (10), having a press unit which comprises at least one press roll (3) and a lower press roll (2), the press roll (3) being mounted on a pivotable mounting lever (15) and being movable by means of at least one adjusting unit (16) which acts on the mounting lever (15) between an operating position, in which the press roll (3) is pressed against the lower press roll (2), and a decommissioned position, in which the press roll (3) is not pressed against the lower press roll (2), characterized in that the press roll (3) is a shoe press roll and the at least one adjusting unit (16) comprises a locking device (20, 21, 22, 23), by means of which the adjusting unit (16) can be locked mechanically in the operating position.
  2. Machine according to Claim 1, characterized in that the operating position comprises a plurality of operating positions, in which the press roll (3) and lower press roll (2) are pressed against one another in each case to a different extent, the locking device (20, 21, 22, 23) being configured in such a way that the adjusting unit (16) can be locked mechanically in each of the different operating positions.
  3. Machine according to Claim 1 or 2, characterized in that the adjusting unit (16) comprises a hydraulic cylinder (17) with a cylinder wall (18) and a piston rod (19) which can be moved in the longitudinal extent of the cylinder wall (18), a mechanical locking action between the wall and the piston rod being imparted by way of the locking device (20, 21, 22, 23).
  4. Machine according to Claim 1, 2 or 3, characterized in that the locking device (20, 21, 22, 23) comprises a bead or groove (20) which extends at least in sections in the circumferential direction of the piston rod (19) and an engagement element (21) which is mounted on the cylinder wall (18) and can be moved relative to the piston rod (19) in such a way that it can be brought into positively locking engagement with the groove (20) or bead in the operating position in order to bring about the locking action.
  5. Machine according to Claim 4, characterized in that the engagement element (21) can be moved substantially perpendicularly with respect to the movement direction of the piston rod (19).
  6. Machine according to Claim 5, characterized in that the engagement element (21) is formed by one or more annular segments (21) which are configured with a complementary shape with respect to the groove (20) or bead.
  7. Machine according to Claim 1 or 2, characterized in that the adjusting unit comprises a mechanical spindle mechanism.
  8. Machine according to one of Claims 1 to 6, characterized in that the mounting lever (15) is mounted in the region of its one longitudinal-side end on the machine frame (6) such that it can be rotated about an axis (7), and in that the adjusting unit (16) acts on the mounting lever (15) in the region of its other longitudinal-side end.
  9. Machine according to Claim 7, characterized in that the rotational axis (5) of the press roll (3) is arranged closer than the adjusting unit (16) to the rotational axis (7) of the mounting lever (15).
  10. Machine according to one of Claims 1 to 8, characterized in that the lower press roll is a drying cylinder, in particular a yankee drying cylinder (2).
EP20070120951 2006-11-23 2007-11-19 Tissue paper machine Not-in-force EP1925723B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200610055711 DE102006055711A1 (en) 2006-11-23 2006-11-23 Tissue paper machine

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EP1925723A1 EP1925723A1 (en) 2008-05-28
EP1925723B1 true EP1925723B1 (en) 2015-01-28

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EP20070120951 Not-in-force EP1925723B1 (en) 2006-11-23 2007-11-19 Tissue paper machine

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DE (1) DE102006055711A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019119894A1 (en) 2019-07-23 2021-01-28 Voith Patent Gmbh Press unit
DE102019119905A1 (en) 2019-07-23 2021-01-28 Voith Patent Gmbh Shoe press

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB783421A (en) * 1954-05-05 1957-09-25 Bowater Res & Dev Co Ltd Device for controlling the operation of a press roll
DE1561700A1 (en) 1967-10-17 1970-10-15 Voith Gmbh J M Self-acceptance paper machine
FI86450C (en) * 1989-10-25 1992-08-25 Ahlstroem Valmet FUNCTIONAL ADJUSTMENT OF MODULAR CONSTRUCTION FOER VALSARNA I EN MASKINKALANDER.
DE19623700C1 (en) * 1996-06-14 1997-06-12 Berstorff Gmbh Masch Hermann Adjustment device for rollers of calender

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DE102006055711A1 (en) 2008-05-29

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