EP1660395B1 - Method for reducing register errors on a web of material moving through the printing nip of a multicolor web-fed rotary press and corresponding devices - Google Patents

Method for reducing register errors on a web of material moving through the printing nip of a multicolor web-fed rotary press and corresponding devices Download PDF

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Publication number
EP1660395B1
EP1660395B1 EP04766674A EP04766674A EP1660395B1 EP 1660395 B1 EP1660395 B1 EP 1660395B1 EP 04766674 A EP04766674 A EP 04766674A EP 04766674 A EP04766674 A EP 04766674A EP 1660395 B1 EP1660395 B1 EP 1660395B1
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EP
European Patent Office
Prior art keywords
web
roller
deformation
curvature
register
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP04766674A
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German (de)
French (fr)
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EP1660395A1 (en
Inventor
Thomas Potzkai
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.)
Koenig and Bauer AG
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Koenig and Bauer AG
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Publication of EP1660395A1 publication Critical patent/EP1660395A1/en
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Publication of EP1660395B1 publication Critical patent/EP1660395B1/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F13/00Common details of rotary presses or machines
    • B41F13/02Conveying or guiding webs through presses or machines
    • B41F13/025Registering devices
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F31/00Inking arrangements or devices
    • B41F31/30Arrangements for tripping, lifting, adjusting, or removing inking rollers; Supports, bearings, or forks therefor
    • B41F31/304Arrangements for inking roller bearings, forks or supports
    • B41F31/305Eccentric bearings
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F33/00Indicating, counting, warning, control or safety devices
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F33/00Indicating, counting, warning, control or safety devices
    • B41F33/0036Devices for scanning or checking the printed matter for quality control
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F33/00Indicating, counting, warning, control or safety devices
    • B41F33/0081Devices for scanning register marks
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00Registering, tensioning, smoothing or guiding webs
    • B65H23/04Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/18Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web
    • B65H23/188Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in connection with running-web
    • B65H23/1882Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in connection with running-web and controlling longitudinal register of web
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/50Occurence
    • B65H2511/51Presence
    • B65H2511/512Marks, e.g. invisible to the human eye; Patterns

Definitions

  • the invention relates to methods for reducing registration errors on a material web running through a nip in a multicolor web-fed rotary printing press and use of devices according to the preamble of claim 1, 3, 23 or 24.
  • Registration errors can occur when printing several printing forms in perfect order, but especially when printing in color.
  • the web passes through several printing units in which it is printed with different colors. If these colors are not exactly printed one above the other in the desired manner because of fluctuating modulus of elasticity of the material web, fluctuating tension profile of the material web, due to climatic influences or due to manufacturing tolerances of the printing form cylinder, this is referred to as registration errors.
  • the extent of a registration error may be a function of its position in the web width direction. If one imagines this function developed as a Taylor series, one sees that the registration error is generally composed of a term of 0th order independent of the position in the width direction, a term of 1st order that is linearly proportional to the position in the width direction, and terms of higher order.
  • the term 0th order, d. H. a registration error over the entire width of the material web in the transport direction of the web, can be corrected in particular by adjusting the relative phase angle of the printing cylinder.
  • the DE 199 60 649 A1 describes a device for correcting the lateral position of a web after a dryer. A correction of a color register is not provided.
  • Fig. 1 of the DE 86 10 958 U1 shows a curved spreader roller.
  • the DE 83 04 988 U1 discloses a side edge control for a screen printing machine which operates with a pivotable roller.
  • the US 4 404 906 A shows a device for controlling fan-out with a curved roller.
  • the US Pat. No. 6,550,384 B1 describes a device for correcting a width of a material web, wherein adjustable deformation elements are looped by the material web.
  • the US 5 553 542 A discloses a system for width control of a web of material by means of sensors and deformation elements.
  • WO 99/40005 A1 is a guide roll for Kompensieren of running disorders known.
  • the guide roller has diameter-variable expansion elements in the region of its ends.
  • the DE 203 09 301 U1 shows a Breitumblenwalze, the curvature of the bale is adjustable.
  • the invention has for its object to provide methods for reducing registration errors on a running in a multi-color roller printing machine through a nip material web and use of devices.
  • the register can be controlled over the entire width as an S-line, ie on one side of the register can be made in the direction of stay in the middle of the web (eg storage) in zero position and on the other side of the machine against the Direction be taken back.
  • This function can also be executed in opposite directions.
  • the invention is much easier to implement.
  • the inventive method can be controlled much more precisely, so that can be targeted errors and reduce faster.
  • a zero-order term of the registration error is additionally reduced in a known manner by adapting a relative phase position of the printing gap.
  • a first-order term of the registration error i. H. a registration error occurring on one side of the web relative to the other side of the web is reduced in a known manner by pivoting the roller so that an axis of the roller forms an angle with the nip.
  • the register error can be detected and the curvature of the roller set while the material web is running. This saves time since switching off and restarting of the material web, as it is e.g. in the case of curvilinear spreader rollers, which are curved when the material web is stationary and pushed into a path of the material web, it is usual, as a rule, very time-consuming.
  • the registration error is detected in each case in opposite edge regions of the printed material web and compensated by displacement or pivoting of the roller located in front of the printing nip.
  • the registration error should also be measured in a middle region of the web.
  • a mark is printed on the material web in order to be able to detect the registration error more easily.
  • a web-processing apparatus is suitable with a Pressure gap through which a running material web to be processed passes during operation of the device, an on the input side arranged by the pressure nip curl and in the operation of the device from the web at least partially wrapped roller, at least one actuator for setting a curvature of the bendable roller, at least one output side of the pressure nip or arranged at the inlet of a subsequent pressure nip sensor for detecting a registration error on the material web and connected to the sensor evaluation unit which is connected to the actuator to cause a change in the curvature of the bendable roller depending on the detected registration error and thereby the registration error to reduce.
  • the foldable roller comprises an axle and a sheath, the sheath being rotatable about the axis.
  • the coat z. B. be supported centrally from the axis and at its ends by a frame, and the actuator may be supported on the one hand on the frame and on the other hand engage the axis.
  • the actuator can also be arranged within the roller between the axis and the jacket and attack on the one hand on the axis and on the other hand on the jacket.
  • the actuator causes a bending of the axis and the shell against each other, so that the jacket assumes a curved shape when viewed from the outside.
  • the foldable roller can advantageously be mounted on two sides in a frame, wherein one end of the roller is independent of the other adjustable. This can be achieved, for example, in that the curvable roller is mounted on at least one side in an eccentric bearing in the frame.
  • Such a support of the foldable roll allows for a simplified pivoting of the foldable roll to reduce first order terms of registration errors such that an axis of the roll forms an angle with the printing nip.
  • a deflection roller arranged with respect to a direction of travel of the material web in front of the foldable roller, which deflection roller can be mounted in different positions in the frame for setting a looping of the foldable roll through the material web.
  • This is particularly advantageous in such bendable rollers, which include an axle and a rotatable jacket, as such rollers are characterized by an increased internal bearing friction.
  • the sensor is preferably arranged in a middle region of the material web in order to detect register errors occurring there. In this case, it is very particularly preferred for at least one further sensor to detect register errors to be present in an edge region of the material web.
  • the web-processing apparatus is particularly preferably a rotogravure printing press.
  • a printing unit of a rotogravure printing press is in Fig. 1 simplified shown in side view.
  • a known forme cylinder 01 and a known impression cylinder 02 are mounted in a frame, not shown, and in such a way made to form a pressure nip 03.
  • a running paper web 04 is guided as a material web 04.
  • Arrows illustrate the direction of the paper web 04, and the rotational directions of the forme cylinder 01 and the impression cylinder 02.
  • Input side of the pressure nip 03 is a foldable roller 06, z.
  • the roller 06 is at least partially looped by the paper web 04 in a wrap angle ⁇ .
  • a deflection roller 07 is mounted in the frame in front of the roller 06.
  • the guide roller 07 is displaceable to different positions in the frame, which in the Fig. 1 is indicated by a dashed double arrow.
  • the roller 06 comprises an axle 08 mounted in the frame, as well as a jacket 09 rotatably mounted about the axle 08.
  • the roller 06 shown acts on each end section of the axle 08 in each case one connected to an evaluation unit 12 and controlled by this actuator 11 a.
  • the actuator 11 act on each end portion of the shell 09.
  • the actuators 11 can be operated, for example, electrically, pneumatically or hydraulically. It is also possible to provide an actuator 11 on only one side of the roller 06.
  • the evaluation unit 12 may be a control circuit or a microcomputer. With the evaluation unit 12 is further a plurality of sensors 13; 23, arranged on the output side of the printing gap 03 and on the two edges (sensors 23, see Fig. 4 ) and a central region (sensor 13) of the paper web 04 are aligned.
  • Fig. 2 is mounted in the frame 19 roller 06 from Fig. 1 shown in longitudinal section while Fig. 3 the storage of the roller 06 in the frame 19 from a lateral view represents.
  • the jacket 09 is a hollow cylindrical jacket 09 which is rotatable about an axis 08.
  • the axle 08 includes two opposite, through the jacket 09 extending therethrough end portions 14.
  • the jacket 09 is at both ends by means of bearings 16, z. B. bearings 16 are rotatably supported in a respective eccentric bearing 22. Both eccentric 22 can be pivoted by the evaluation unit 12 by means of a (not shown) turntable.
  • Each actuator 11 engages on the one hand on in each case one of the end portions 14 and on the other hand via the corresponding eccentric bearing 22 on the frame 19.
  • the paper web 04 passes through the printing unit on the in Fig. 1 shown way.
  • the guide roller 07 is mounted on such a position in the frame 19 that the wrap of the roller 06 through the paper web 04 sufficient force to overcome the bearing friction in the roller 06 can flow.
  • the paper web 04 is printed by the forme cylinder 01.
  • additional marks so-called miniature dot or registration marks, are printed on the paper web 04. Instead of these additional registration marks and pixels of the actual printed image can be used. Under registration marks are understood both additional registration marks and existing pixels of the actual print image, z. B.
  • registration marks and / or picture elements are detected by the sensors 13; 23 recorded. It can also be a sensor 13; 23 capture several passer features or picture elements. An occurring registration error can be detected and measured particularly easily with the aid of these markings by the sensors 13, 23. The result of this detection is from the sensors 13; 23 passed to the evaluation unit 12. Depending on the size of the registration error, the evaluation unit 12 then outputs in each case a control signal to the actuators 11 as well as the rotary actuators of the eccentric bearings 22.
  • Fig. 4 shows a plan view of the impression cylinder 02 and the roller 06 with different degrees of pivoting at the two ends of the roller 06, in the Frame 19 are mounted, and guided by the covered by the impression cylinder 02 and therefore dashed line printing gap 03, the roller 06 in the perspective shown from below wrap around the paper 04.
  • the output side of the hidden pressure nip 03 is a sensor 13 to a central region of the paper web 04 aligned to detect a registration error occurring in this area.
  • further sensors 23 are arranged in edge regions of the paper web 04. All sensors 13; 23 are with the in Fig. 4 not shown evaluation unit 12 connected.
  • both eccentric bearings 22 are pivoted by an equal amount in the same direction, thereby reducing a term zero order of the registration error ( Fig. 9 ).
  • Differences in the control signals sent to the turntables lead to the in Fig. 4 shown different degrees of pivoting at the two end portions 14 of the roller 06, so that an axis 21 of the roller 06 and the pressure gap 03 form an angle, and allow compensation of the first order of Passerhous, especially in the edge regions of the paper web 04 through the Sensors 23 is detected ( Fig. 9 ).
  • the second-order terms of the registration error are in particular detected by the central sensor 13 and reduced by a curvature of the roller 06.
  • the actuators 11 press with a force on the extended end portions 14 of the axle 08 and thereby exert a force on the axle 08 from.
  • This force is transmitted via the roller bearings 17 on the jacket 09, which bends thereby.
  • the bearings 17 ensure that despite the considerable pressure and deformation forces the jacket 09 remains easily rotatable. They are preferably formed as a cylindrical roller bearing 17 to prevent tilting of the jacket 09 on the axis 08, which could affect the rotatability.
  • FIGS. 5 and 6 are the pressure gap 03 formed by the forme cylinder 01 and the impression cylinder 02, the roller 06 and the guided through the nip 03 and the roller 06 looping paper web 04 shown for different curvatures of the roller 06.
  • the roller 06 is arranged at a distance a from the printing gap 03.
  • Fig. 5 the roller 06 is less curved, in Fig. 6 she is more curved.
  • Fig. 5 H is a distance of the highest point to the lowest point of the bale of the roller 06.
  • the size h thus represents a measure of the curvature h of the roller 06.
  • the direction of the curvature in the vicinity (ie +/- 25 °, in particular +/- 10 °) of the direction of the bisector of Umschlingmgswinkels ( ⁇ is at least 45 °, more preferably at least 90 °, but preferably between 95 ° and 115 ° ).
  • the print line can be executed over the machine width as S-line.
  • FIG. 7 an alternative embodiment of the roller 06 is shown.
  • This roller 06 also comprises a hollow axle 08 and an elastic casing 09 rotatable about this axle 08.
  • actuators 18 are arranged on the axle 08 within the roller 06.
  • the actuators 18 include bearings 17 with which they press from the inside against the jacket 09 and thus bend it. In this case, the bearings 17 ensure that the jacket 09 can roll as smoothly as possible on the actuators 18.
  • roller 06 are provided diametrically to the actuators 18 shown second actuators 18 on the axis 08.
  • the actuators 18 can be controlled individually or in groups. Thus, it is possible, by group-wise driving the actuators 18, the roller 06 to bend to a roughly S-shaped form.
  • third actuators 18 may also be provided on the axle 08 which act in a direction perpendicular to the line of action of the actuators 18 shown or in a direction which forms any angle with the line of action of the actuators 18 shown , A roller 06 configured in this way can even be bent to an arbitrary tortuous shape in the longitudinal direction of the roller 06.
  • a web 04 On a web 04 are, as in FIGS. 8 or 9 shown, several pixels printed.
  • a plurality of first picture elements are preferably printed side by side in a first printing unit and corresponding second picture elements are printed in a second printing unit.
  • the illustrated roller 06 in particular web guide roller 06, belongs to the second printing unit. By deflection of the roller 06 in particular perpendicular to the running direction of the material web 04, the picture elements of the second printing unit are displaced relative to the picture elements of the first printing unit or in the direction of travel.
  • the position of the middle picture elements is changed relative to the position of the two outer picture elements.
  • the material web 04 has at least four groups of picture elements, each of which is printed by a printing unit. At least three of these at least four printing units are each assigned a deflectable roller 06.
  • the evaluation of this group of picture elements can be performed by at least one sensor 13; 23 carried out, which evaluates at least one pixel of the at least four printing units. Depending on the signals or the signal of a sensor 13; 23 actuating elements for the deflection of at least three rollers 06 are actuated.
  • a deformation is contactless, in particular by means of compressed air, for. B. by adjusting the amount of air and / or air pressure or by changing the distance of an air outlet opening possible.
  • the deformation of the material web 04 as a result of the foldable rollers 06 or deformation elements 26 takes place at the location of the deformation perpendicular to the running plane of the material web 04.
  • the roller 06 is deformable in a direction which is in a range of +/- 25 °, in particular of +/- 10 to an angle bisector of Umachlagswinkels ⁇ .
  • the deformation of the material web 04 by means of the roller 06 or deformation elements 26 preferably takes place in no pressure gap 03.
  • adjustment of the register transversely to the direction of travel eg temperature change, in particular increase causes shrinkage in a dryer between two pressure gaps and / or introduction of moisture, for example by means of saturated water vapor
  • a control / adjustment of the passport in the direction of travel and then a regulation / adjustment of the passport takes place transversely to the running direction of the web.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Quality & Reliability (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Electronic Switches (AREA)
  • Printing Methods (AREA)
  • Rotary Presses (AREA)

Abstract

Register errors on a web of material which is moving through the printing nip of a multicolor web-fed rotary printing press are reduced. This is accomplished by providing a portion of the web of material, what is located between the web lateral edges of the web and areas in the vicinity of the lateral edges of the web, with a deformation relative to each other. Such deformations are directed perpendicularly to a plane of rotation of the web of material which is subject to a register error occurring in the direction of rotation of the web of material.

Description

Die Erfindung betrifft Verfahren zur Reduktion von Passerfehlern auf einer in einer Mehrfarbenrollenrotationsdruckmaschine durch einen Druckspalt laufenden Materialbahn und Verwendung von Vorrichtungen gemäß dem Oberbegriff des Anspruchs 1, 3, 23 oder 24.The invention relates to methods for reducing registration errors on a material web running through a nip in a multicolor web-fed rotary printing press and use of devices according to the preamble of claim 1, 3, 23 or 24.

Passerfehler können beim standgerechten Drucken mehrerer Druckformen aufeinander auftreten, vor allem aber beim Farbdruck. Dabei durchläuft die Materialbahn mehrere Druckwerke, in denen sie mit jeweils verschiedenen Farben bedruckt wird. Werden diese Farben wegen schwankendem Elastizitätsmodul der Materialbahn, schwankendem Spannungsprofil der Materialbahn, wegen klimatischen Einflüssen oder wegen Fertigungstoleranzen der Druckformzylinder nicht in gewünschter Weise exakt übereinander gedruckt, spricht man von Passerfehlern.Registration errors can occur when printing several printing forms in perfect order, but especially when printing in color. The web passes through several printing units in which it is printed with different colors. If these colors are not exactly printed one above the other in the desired manner because of fluctuating modulus of elasticity of the material web, fluctuating tension profile of the material web, due to climatic influences or due to manufacturing tolerances of the printing form cylinder, this is referred to as registration errors.

Das Ausmaß eines Passerfehlers kann eine Funktion seiner Position in Breitenrichtung der Bahn sein. Stellt man sich diese Funktion als Taylorreihe entwickelt vor, so sieht man, dass der Passerfehler sich im Allgemeinen aus einem von der Position in Breitenrichtung unabhängigen Term 0. Ordnung, einem zur Position in Breitenrichtung linear proportionalen Term 1. Ordnung und Termen höherer Ordnung zusammensetzt. Der Term 0. Ordnung , d. h. ein Passerfehler über der gesamten Breite der Materialbahn in Transportrichtung der Materialbahn, kann insbesondere durch eine Anpassung der relativen Phasenlage der Druckzylinder korrigiert werden.The extent of a registration error may be a function of its position in the web width direction. If one imagines this function developed as a Taylor series, one sees that the registration error is generally composed of a term of 0th order independent of the position in the width direction, a term of 1st order that is linearly proportional to the position in the width direction, and terms of higher order. The term 0th order, d. H. a registration error over the entire width of the material web in the transport direction of the web, can be corrected in particular by adjusting the relative phase angle of the printing cylinder.

Die DE 199 60 649 A1 beschreibt eine Vorrichtung zur Korrektur der lateralen Position einer Bahn nach einem Trockner. Eine Korrektur eines Farbregisters ist nicht vorgesehen.The DE 199 60 649 A1 describes a device for correcting the lateral position of a web after a dryer. A correction of a color register is not provided.

Fig. 1 der DE 86 10 958 U1 zeigt eine gekrümmte Breitstreckwalze. Fig. 1 of the DE 86 10 958 U1 shows a curved spreader roller.

Die DE 83 04 988 U1 offenbart eine Seitenkantensteuerung für eine Siebdruckmaschine, die mit einer schwenkbaren Walze arbeitet.The DE 83 04 988 U1 discloses a side edge control for a screen printing machine which operates with a pivotable roller.

Die US 4 404 906 A zeigt eine Vorrichtung zur Kontrolle von Fan-Out mit einer gekrümmten Walze.The US 4 404 906 A shows a device for controlling fan-out with a curved roller.

Die US 6 550 384 B1 beschreibt eine Vorrichtung zur Korrektur einer Breite einer Materialbahn, wobei einstellbare Verformungselemente von der Materialbahn umschlungen sind.The US Pat. No. 6,550,384 B1 describes a device for correcting a width of a material web, wherein adjustable deformation elements are looped by the material web.

Die US 5 553 542 A offenbart ein System zur Breitenregelung einer Materialbahn mittels Sensoren und Verformungselementen.The US 5 553 542 A discloses a system for width control of a web of material by means of sensors and deformation elements.

Aus der EP 0 659 585 A1 ist ein Gummituch mit variierendem Profil zur Reduzierung von Faltenbildung bekannt.From the EP 0 659 585 A1 is a rubber blanket with varying profile for reducing wrinkles known.

Durch die WO 99/40005 A1 ist eine Leitwalze zum komenpensieren von Laufstörungen bekannt. Die Leitwalze weist im Bereich ihrer Enden durchmesserveränderbare Aufweitelemente auf.By the WO 99/40005 A1 is a guide roll for Kompensieren of running disorders known. The guide roller has diameter-variable expansion elements in the region of its ends.

Die DE 203 09 301 U1 zeigt eine Breitstreckenwalze, wobei die Krümmung des Ballens einstellbar ist.The DE 203 09 301 U1 shows a Breitstreckenwalze, the curvature of the bale is adjustable.

Der Erfindung liegt die Aufgabe zugrunde, Verfahren zur Reduktion von Passerfehlern auf einer in einer Mehrfarbenrollenrotationsdruckmaschine durch einen Druckspalt laufenden Materialbahn und Verwendung von Vorrichtungen zu schaffen.The invention has for its object to provide methods for reducing registration errors on a running in a multi-color roller printing machine through a nip material web and use of devices.

Die Aufgabe wird erfindungsgemäß durch die Merkmale des Anspruchs 1, 3, 23 oder 24 gelöst.The object is achieved by the features of claim 1, 3, 23 or 24.

Mit der Erfindung werden Passerfehler in Laufrichtung der Materialbahn reduziert.With the invention, registration errors in the direction of travel of the material web are reduced.

Die mit der Erfindung erzielbaren Vorteile bestehen insbesondere darin, dass mit demThe achievable with the present invention consist in particular that with the

Verfahren sich zweite oder höhere Ordnungen des Passerfehlers, d. h. ein Passerfehler, der relativ zu den beiden Seiten der Materialbahn, insbesondere in der Mitte der Materialbahn auftritt, reduzieren lassen, was mit den bekannten Verfahren nicht möglich.Process second or higher orders of register error, d. H. a registration error, which occurs relative to the two sides of the material web, especially in the middle of the web, reduce, which is not possible with the known methods.

Ebenso kann mit dieser Erfindung der Passer über die gesamte Breite als S-Linie gesteuert werden, d. h. auf einer Seite kann der Passer in Laufrichtung vorgenommen werden, in der Bahnmitte (z. B. Lagerstelle) in Nulllage bleiben und auf der anderen Maschinenseite gegen die Laufrichtung zurückgenommen werden. Diese Funktion kann auch gegenläufig ausgeführt werden.Likewise, with this invention, the register can be controlled over the entire width as an S-line, ie on one side of the register can be made in the direction of stay in the middle of the web (eg storage) in zero position and on the other side of the machine against the Direction be taken back. This function can also be executed in opposite directions.

Im Vergleich zu den bekannten Verfahren ist die Erfindung wesentlich einfacher auszuführen. Insbesondere im Vergleich mit den Verfahren, bei denen der Elastizitätsmodul der Materialbahn beeinflusst wird, läßt sich das erfindungsgemäße Verfahren wesentlich exakter steuern, so dass sich Passerfehler gezielter und schneller reduzieren lassen.Compared to the known methods, the invention is much easier to implement. In particular, in comparison with the methods in which the modulus of elasticity of the material web is influenced, the inventive method can be controlled much more precisely, so that can be targeted errors and reduce faster.

Vorteilhafterweise wird zusätzlich ein Term nullter Ordnung des Passerfehlers auf bekannte Weise durch Anpassung einer relativen Phasenlage des Druckspalts reduziert. Ebenso vorteilhaft wird ein Term erster Ordnung des Passerfehlers, d. h. ein Passerfehler, der auf einer Seite der Materialbahn relativ zur anderen Seite der Materialbahn auftritt, auf bekannte Weise durch Schwenken der Walze, so dass eine Achse der Walze mit dem Druckspalt einen Winkel bildet, reduziert.Advantageously, a zero-order term of the registration error is additionally reduced in a known manner by adapting a relative phase position of the printing gap. Also advantageous is a first-order term of the registration error, i. H. a registration error occurring on one side of the web relative to the other side of the web is reduced in a known manner by pivoting the roller so that an axis of the roller forms an angle with the nip.

Dabei läßt sich beim Verfahren der Passerfehler erfassen und die Krümmung der Walze einstellen, während die Materialbahn läuft. Es wird dadurch Zeit gespart, da ein Abschalten und wieder Anlaufenlassen der Materialbahn, wie es z.B. bei krümmbaren Breitstreckwalzen, die bei stillstehender Materialbahn gekrümmt und in einen Weg der Materialbahn geschoben werden, üblich ist, in der Regel sehr zeitraubend ist.In the process, the register error can be detected and the curvature of the roller set while the material web is running. This saves time since switching off and restarting of the material web, as it is e.g. in the case of curvilinear spreader rollers, which are curved when the material web is stationary and pushed into a path of the material web, it is usual, as a rule, very time-consuming.

Herkömmlicherweise wird der Passerfehler jeweils in entgegengesetzten Randbereichen der bedruckten Materialbahn erfasst und durch Verschieben bzw. Schwenken der vor dem Druckspalt liegenden Walze kompensiert. Um unkompensierte Terme zweiter oder höherer Ordnung des Passerfehlers zu erfassen; sollte darüber hinaus auch in einem mittleren Bereich der Bahn der Passerfehler gemesser werden.Conventionally, the registration error is detected in each case in opposite edge regions of the printed material web and compensated by displacement or pivoting of the roller located in front of the printing nip. To detect uncompensated second or higher order terms of the registration error; In addition, the registration error should also be measured in a middle region of the web.

Ganz besonders bevorzugt wird eine Markierung auf der Materialbahn gedruckt, um den Passerfehler leichter erfassen zu können.Most preferably, a mark is printed on the material web in order to be able to detect the registration error more easily.

Zur Ausführung des Verfahrens eignet sich eine bahnverarbeitende Vorrichtung mit einem Druckspalt, durch den im Betrieb der Vorrichtung eine zu verarbeitende laufende Materialbahn hindurchtritt, einer eingangsseitig vom Druckspalt angeordneten krümmbaren und im Betrieb der Vorrichtung von der Materialbahn wenigstens teilweise umschlungenen Walze, wenigstens einem Stellglied zum Einstellen einer Krümmung der krümmbaren Walze, wenigstens einem ausgangsseitig vom Druckspalt bzw. an Einlauf eines nachfolgenden Druckspaltes angeordneter Sensor zum Erfassen eines Passerfehlers auf der Materialbahn und einer mit dem Sensor verbundenen Auswerteeinheit, die mit dem Stellglied verbunden ist, um in Abhängigkeit vom erfassten Passerfehler eine Änderung der Krümmung der krümmbaren Walze zu veranlassen und dadurch den Passerfehler zu reduzieren.To execute the method, a web-processing apparatus is suitable with a Pressure gap through which a running material web to be processed passes during operation of the device, an on the input side arranged by the pressure nip curl and in the operation of the device from the web at least partially wrapped roller, at least one actuator for setting a curvature of the bendable roller, at least one output side of the pressure nip or arranged at the inlet of a subsequent pressure nip sensor for detecting a registration error on the material web and connected to the sensor evaluation unit which is connected to the actuator to cause a change in the curvature of the bendable roller depending on the detected registration error and thereby the registration error to reduce.

Vorzugsweise umfasst die krümmbare Walze eine Achse und einen Mantel, wobei der Mantel um die Achse drehbar ist. Dabei kann der Mantel z. B. mittig von der Achse und an seinen Enden von einem Gestell abgestützt sein, und das Stellglied kann einerseits am Gestell abgestützt sein und andererseits an der Achse angreifen. Das Stellglied kann aber auch innerhalb der Walze zwischen Achse und Mantel angeordnet sein und einerseits an der Achse und andererseits am Mantel angreifen. Auch ist es unmöglich die Enden des Mantels mittels eines Stellgliedes relativ zur Achse zu verlagern, so dass der mittlere Bereich annähernd ortsfest bleibt und die Enden bewegt werden. In allen Fällen bewirkt das Stellglied eine Verbiegung von Achse und Mantel gegeneinander, so dass der Mantel von außen betrachtet eine gekrümmte Form annimmt.Preferably, the foldable roller comprises an axle and a sheath, the sheath being rotatable about the axis. In this case, the coat z. B. be supported centrally from the axis and at its ends by a frame, and the actuator may be supported on the one hand on the frame and on the other hand engage the axis. The actuator can also be arranged within the roller between the axis and the jacket and attack on the one hand on the axis and on the other hand on the jacket. Also, it is impossible to displace the ends of the shell by means of an actuator relative to the axis, so that the central region remains approximately stationary and the ends are moved. In all cases, the actuator causes a bending of the axis and the shell against each other, so that the jacket assumes a curved shape when viewed from the outside.

Die krümmbare Walze kann vorteilhaft zweiseitig in einem Gestell gelagert sein, wobei ein Ende der Walze unabhängig von dem anderen verstellbar ist. Dies kann beispielsweise dadurch erreicht werden, dass die krümmbare Walze auf wenigstens einer Seite in einem Exzenterlager im Gestell gelagert ist. Eine solche Lagerung der krümmbaren Walze ermöglicht ein vereinfachtes Schwenken der krümmbaren Walze zur Reduktion von Termen erster Ordnung der Passerfehler derart, dass eine Achse der Walze mit dem Druckspalt einen Winkel bildet.The foldable roller can advantageously be mounted on two sides in a frame, wherein one end of the roller is independent of the other adjustable. This can be achieved, for example, in that the curvable roller is mounted on at least one side in an eccentric bearing in the frame. Such a support of the foldable roll allows for a simplified pivoting of the foldable roll to reduce first order terms of registration errors such that an axis of the roll forms an angle with the printing nip.

Ganz besonders bevorzugt ist eine bezüglich einer Laufrichtung der Materialbahn vor der krümmbaren Walze angeordnete Umlenkwalze vorhanden, die zur Einstellung einer Umschlingung der krümmbaren Walze durch die Materialbahn auf verschiedenen Positionen im Gestell lagerbar ist. Dies ist besonders bei solchen krümmbaren Walzen von Vorteil, die eine Achse und einen drehbaren Mantel umfassen, da sich solche Walzen durch eine erhöhte innere Lagerreibung auszeichnen. Indem mittels der Umlenkwalze eine Umschlingung und mit ihr eine Krafteinleitung in die krümmbare Walze eingestellt wird, kann dieser höheren Lagerrreibung Rechnung getragen werden. Dies macht die Vorrichtung zudem flexibel für unterschiedliche Papiersörten, für welche ein jeweils idealer Umschlingungswinkel der krümmbaren Walze eingestellt werden kann.Very particular preference is given to a deflection roller arranged with respect to a direction of travel of the material web in front of the foldable roller, which deflection roller can be mounted in different positions in the frame for setting a looping of the foldable roll through the material web. This is particularly advantageous in such bendable rollers, which include an axle and a rotatable jacket, as such rollers are characterized by an increased internal bearing friction. By means of the guide roller a wrap and with it a force is introduced into the foldable roller, this higher Lagerration can be taken into account. This also makes the device flexible for different paper grades, for each of which an ideal angle of wrap of the foldable roll can be set.

Der Sensor ist bevorzugt in einem mittleren Bereich der Materialbahn angeordnet, um dort auftretende Passerfehler zu erfassen. Dabei ist ganz besonders bevorzugt wenigstens ein weiterer Sensor zur Erfassung von Passerfehlern in einem Randbereich der Materialbahn vorhanden.The sensor is preferably arranged in a middle region of the material web in order to detect register errors occurring there. In this case, it is very particularly preferred for at least one further sensor to detect register errors to be present in an edge region of the material web.

Wie oben bereits erwähnt, handelt es sich bei der bahnverarbeitenden Vorrichtung besonders bevorzugt um eine Rotationstiefdruckmaschine.As already mentioned above, the web-processing apparatus is particularly preferably a rotogravure printing press.

Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und werden im folgenden näher beschrieben.Embodiments of the invention are illustrated in the drawings and will be described in more detail below.

Es zeigen:

Fig. 1
eine schematische Seitenansicht eines Druckwerks einer Rotationstiefdruckmaschine;
Fig. 2
einen vereinfachten Querschnitt durch eine erste Ausführung der krümmbaren Walze;
Fig. 3
eine schematische Seitenansicht eines Lagers der krümmbaren Walze aus Fig.2;
Fig. 4
eine Draufsicht auf einen Teil der Rotationstiefdruckmaschine mit schräg zur Materialbahn verschwenkter krümmbarer Walze;
Fig. 5
einen Teil der Rotationstiefdruckmaschine aus Fig. 1 mit schwach gekrümmter krümmbarer Walze;
Fig. 6
einen Teil der Rotationstiefdruckmaschine aus Fig. 1 mit stark gekrümmter krümmbarer Walze;
Fig. 7
einen vereinfachten Querschnitt durch eine zweite Ausführung der krümmbaren Walze;
Fig. 8
Auswirkungen von verschiedenen Durchbiegungen der Walze auf eine Bildelemente aufweisende Materialbahn;
Fig. 9
Auswirkungen von verschiedenen Positionen verschiedener Bereiche der Walze auf eine Bildelemente aufweisende Materialbahn;
Fig. 10
schematische Darstellung von Vorrichtungen zum Einstellen des Passers mit mehreren Verformungselementen.
Show it:
Fig. 1
a schematic side view of a printing unit of a rotogravure printing machine;
Fig. 2
a simplified cross section through a first embodiment of the bendable Roller;
Fig. 3
a schematic side view of a bearing of the foldable roller Fig.2 ;
Fig. 4
a plan view of a portion of the rotogravure printing machine with an angle to the material web swiveled foldable roller;
Fig. 5
a part of the rotogravure printing machine Fig. 1 with a slightly curved, foldable roller;
Fig. 6
a part of the rotogravure printing machine Fig. 1 with strongly curved foldable roller;
Fig. 7
a simplified cross section through a second embodiment of the foldable roller;
Fig. 8
Effects of different deflections of the roller on a picture elements having material web;
Fig. 9
Effects of different positions of different areas of the roller on a pictorial material web;
Fig. 10
schematic representation of devices for adjusting the passport with a plurality of deformation elements.

Ein Druckwerk einer Rotationstiefdruckmaschine ist in Fig. 1 vereinfacht in Seitenansicht dargestellt. Dabei sind ein bekannter Formzylinder 01 sowie ein bekannter Gegendruckzylinder 02 in einem nicht gezeigten Gestell gelagert und derart aneinander angestellt, dass sie einen Druckspalt 03 bilden. Durch den Druckspalt 03 ist als Materialbahn 04 eine laufende Papierbahn 04 geführt. Pfeile verdeutlichen die Laufrichtung der Papierbahn 04, sowie die Rotationsrichtungen des Formzylinders 01 und des Gegendruckzylinders 02. Eingangsseitig vor dem Druckspalt 03 ist eine krümmbare Walze 06, z. B. Bahnleitwalze (keine Druckfarbe übertragend), angeordnet, bei der es sich um eine Durchdrückwalze 06 handelt. Die Walze 06 wird von der Papierbahn 04 zumindest teilweise in einem Umschlingungswinkel α umschlungen. Bezüglich der Laufrichtung der Papierbahn 04 ist vor der Walze 06 eine Umlenkwalze 07 im Gestell gelagert. Die Umlenkwalze 07 ist auf verschiedene Positionen im Gestell verschiebbar, was in der Fig. 1 durch einen gestrichelten Doppelpfeil angedeutet ist. Je nach Position der Umlenkwalze 07 ändert sich die Umschlingung der Walze 06. Die Walze 06 umfasst eine im Gestell gelagerte Achse 08, sowie einen um die Achse 08 drehbar gelagerten Mantel 09. Bei der gezeigten Ausführung der Walze 06 wirkt auf jeden Endabschnitt der Achse 08 jeweils ein mit einer Auswerteeinheit 12 verbundenes und von dieser angesteuertes Stellglied 11 ein. Auch ist es möglich auf jeden Endabschnitt des Mantels 09 ein Stellglied 11 wirken zu lassen. Die Stellglieder 11 können beispielsweise elektrisch, pneumatisch oder hydraulisch betrieben werden. Es ist auch möglich, auf nur einer Seite der Walze 06 ein Stellglied 11 vorzusehen. Bei der Auswerteeinheit 12 kann es sich um eine Steuerschaltung bzw. um einen Mikrocomputer handeln. Mit der Auswerteeinheit 12 ist ferner eine Mehrzahl von Sensoren 13; 23 verbunden, die ausgangsseitig vom Druckspalt 03 angeordnet und auf die beiden Ränder (Sensoren 23, siehe Fig. 4) sowie einen mittleren Bereich (Sensor 13) der Papierbahn 04 ausgerichtet sind.A printing unit of a rotogravure printing press is in Fig. 1 simplified shown in side view. In this case, a known forme cylinder 01 and a known impression cylinder 02 are mounted in a frame, not shown, and in such a way made to form a pressure nip 03. Through the nip 03, a running paper web 04 is guided as a material web 04. Arrows illustrate the direction of the paper web 04, and the rotational directions of the forme cylinder 01 and the impression cylinder 02. Input side of the pressure nip 03 is a foldable roller 06, z. B. web guide roller (no ink transferring), arranged, which is a push-through roller 06. The roller 06 is at least partially looped by the paper web 04 in a wrap angle α. With respect to the running direction of the paper web 04, a deflection roller 07 is mounted in the frame in front of the roller 06. The guide roller 07 is displaceable to different positions in the frame, which in the Fig. 1 is indicated by a dashed double arrow. Depending on the position of the deflecting roller 07, the looping of the roller 06 changes. The roller 06 comprises an axle 08 mounted in the frame, as well as a jacket 09 rotatably mounted about the axle 08. In the embodiment of the roller 06 shown acts on each end section of the axle 08 in each case one connected to an evaluation unit 12 and controlled by this actuator 11 a. It is also possible to have an actuator 11 act on each end portion of the shell 09. The actuators 11 can be operated, for example, electrically, pneumatically or hydraulically. It is also possible to provide an actuator 11 on only one side of the roller 06. The evaluation unit 12 may be a control circuit or a microcomputer. With the evaluation unit 12 is further a plurality of sensors 13; 23, arranged on the output side of the printing gap 03 and on the two edges (sensors 23, see Fig. 4 ) and a central region (sensor 13) of the paper web 04 are aligned.

In Fig. 2 ist die im Gestell 19 gelagerte Walze 06 aus Fig. 1 im Längsschnitt gezeigt, während Fig. 3 die Lagerung der Walze 06 im Gestell 19 aus seitlicher Sicht darstellt. Wie in Fig. 2 zu sehen ist, handelt es sich bei dem Mantel 09 um einen hohlzylindrischen Mantel 09, der um eine Achse 08 drehbar ist. In einem mittleren Bereich ist der Mantel 09 über ein oder mehrere zwischen ihm und der Achse 08 eingefügte Lager 17, z. B. Wälzlager 17 unterstützt. Die Achse 08 umfasst zwei entgegengesetzte, durch den Mantel 09 hindurch verlängerte Endabschnitte 14. Der Mantel 09 ist an beiden Enden mittels Lager 16, z. B. Wälzlager 16 in jeweils einem Exzenterlager 22 drehbar gehalten. Beide Exzenterlager 22 können von der Auswerteeinheit 12 mit Hilfe eines (nicht dargestellten) Drehstellers geschwenkt werden. Jedes Stellglied 11 greift einerseits an jeweils einem der Endabschnitte 14 und andererseits über das entsprechende Exzenterlager 22 am Gestell 19 an.In Fig. 2 is mounted in the frame 19 roller 06 from Fig. 1 shown in longitudinal section while Fig. 3 the storage of the roller 06 in the frame 19 from a lateral view represents. As in Fig. 2 can be seen, it is in the jacket 09 is a hollow cylindrical jacket 09 which is rotatable about an axis 08. In a central region of the jacket 09 via one or more inserted between it and the axis 08 bearings 17, z. B. Rolling 17 supported. The axle 08 includes two opposite, through the jacket 09 extending therethrough end portions 14. The jacket 09 is at both ends by means of bearings 16, z. B. bearings 16 are rotatably supported in a respective eccentric bearing 22. Both eccentric 22 can be pivoted by the evaluation unit 12 by means of a (not shown) turntable. Each actuator 11 engages on the one hand on in each case one of the end portions 14 and on the other hand via the corresponding eccentric bearing 22 on the frame 19.

Im Betrieb der Rotationstiefdruckmaschine durchläuft die Papierbahn 04 das Druckwerk auf dem in Fig. 1 gezeigten Weg. Um innere Lagerreibungen der Walze 06 in Folge der Drehung des Mantels 09 um die Achse 08 zu überwinden, ist die Umlenkwalze 07 auf einer derartigen Position im Gestell 19 gelagert, dass die Umschlingung der Walze 06 durch die Papierbahn 04 ausreichend Kraft zur Überwindung der Lagerreibungen in die Walze 06 einfliessen lässt. Beim Durchlaufen des Druckspalts 03 wird die Papierbahn 04 durch den Formzylinder 01 bedruckt. Dabei werden auf der Papierbahn 04 zusätzliche Markierungen, sogenannte Miniaturpunkt- oder Passermarken, mitgedruckt. Anstelle dieser zusätzlichen Passermarken können auch Bildelemente des eigentlichen Druckbildes verwendet werden. Unter Passermarken werden sowohl zusätzliche Passermarken als auch vorhandene Bildelemente des eigentlichen Druckbildes verstanden, z. B. Teile des einzelnen Farbauszuges des Druckbildes. Diese Passermarken und/oder Bildelemente werden von den Sensoren 13; 23 erfasst. Es kann auch ein Sensor 13; 23 mehrere Passermerkmale oder Bildelemente erfassen. Ein auftretender Passerfehler kann anhand dieser Markierungen von den Sensoren 13, 23 besonders leicht erkannt und vermessen werden. Das Ergebnis dieser Erfassung wird von den Sensoren 13; 23 an die Auswerteeinheit 12 übergeben. Je nach Größe des Passerfehlers gibt die Auswerteeinheit 12 anschließend jeweils ein Stellsignal an die Stellglieder 11 sowie die Drehsteller der Exzenterlager 22 aus.During operation of the rotogravure printing machine, the paper web 04 passes through the printing unit on the in Fig. 1 shown way. In order to overcome internal bearing friction of the roller 06 as a result of rotation of the shell 09 about the axis 08, the guide roller 07 is mounted on such a position in the frame 19 that the wrap of the roller 06 through the paper web 04 sufficient force to overcome the bearing friction in the roller 06 can flow. When passing through the printing gap 03, the paper web 04 is printed by the forme cylinder 01. In this case, additional marks, so-called miniature dot or registration marks, are printed on the paper web 04. Instead of these additional registration marks and pixels of the actual printed image can be used. Under registration marks are understood both additional registration marks and existing pixels of the actual print image, z. B. parts of the individual color separation of the printed image. These registration marks and / or picture elements are detected by the sensors 13; 23 recorded. It can also be a sensor 13; 23 capture several passer features or picture elements. An occurring registration error can be detected and measured particularly easily with the aid of these markings by the sensors 13, 23. The result of this detection is from the sensors 13; 23 passed to the evaluation unit 12. Depending on the size of the registration error, the evaluation unit 12 then outputs in each case a control signal to the actuators 11 as well as the rotary actuators of the eccentric bearings 22.

Fig. 4 zeigt eine Draufsicht auf den Gegendruckzylinder 02 und die Walze 06 mit unterschiedlich starken Verschwenkungen an den beiden Enden der Walze 06, die im Gestell 19 gelagert sind, und die durch den von dem Gegendruckzylinder 02 verdeckten und daher gestrichelt gezeichneten Druckspalt 03 geführte, die Walze 06 in der dargestellten Perspektive von unten umschlingende Papierbahn 04. Ausgangsseitig vom verdeckten Druckspalt 03 ist ein Sensor 13 auf einen mittleren Bereich der Papierbahn 04 ausgerichtet, um einen in diesem Bereich auftretenden Passerfehler zu erfassen. Darüber hinaus sind weitere Sensoren 23 in Randbereichen der Papierbahn 04 angeordnet. Alle Sensoren 13; 23 sind mit der in Fig. 4 nicht gezeigten Auswerteeinheit 12 verbunden. Fig. 4 shows a plan view of the impression cylinder 02 and the roller 06 with different degrees of pivoting at the two ends of the roller 06, in the Frame 19 are mounted, and guided by the covered by the impression cylinder 02 and therefore dashed line printing gap 03, the roller 06 in the perspective shown from below wrap around the paper 04. the output side of the hidden pressure nip 03 is a sensor 13 to a central region of the paper web 04 aligned to detect a registration error occurring in this area. In addition, further sensors 23 are arranged in edge regions of the paper web 04. All sensors 13; 23 are with the in Fig. 4 not shown evaluation unit 12 connected.

Wenn die an die Drehsteller der Exzenterlager 22 gesendeten Stellsignale bei zunächst gleich starken Verschinienkungen an den beiden Endabschnitten 14 der Walze 06 gleich sind, werden beide Exzenterlager 22 um einen gleichen Betrag in gleicher Richtung geschwenkt, um dadurch einen Term nullter Ordnung des Passerfehlers zu reduzieren (Fig. 9). Differenzen in den an die Drehsteller gesendeten Stellsignalen führen zu den in Fig. 4 gezeigten unterschiedlich starken Verschwenkungen an den beiden Endabschnitten 14 der Walze 06, so dass eine Achse 21 der Walze 06 und der Druckspalt 03 einen Winkel bilden, und ermöglichen eine Kompensation der ersten Ordnung des Passerfehlers, der vor allem in den Randbereichen der Papierbahn 04 durch die Sensoren 23 erfasst wird (Fig. 9).When the control signals sent to the turntables of the eccentric bearings 22 are the same at initially equally strong Verschinienkungen at the two end portions 14 of the roller 06, both eccentric bearings 22 are pivoted by an equal amount in the same direction, thereby reducing a term zero order of the registration error ( Fig. 9 ). Differences in the control signals sent to the turntables lead to the in Fig. 4 shown different degrees of pivoting at the two end portions 14 of the roller 06, so that an axis 21 of the roller 06 and the pressure gap 03 form an angle, and allow compensation of the first order of Passerfehlers, especially in the edge regions of the paper web 04 through the Sensors 23 is detected ( Fig. 9 ).

Die Terme zweiter Ordnung des Passerfehlers werden insbesondere vom mittleren Sensor 13 erfasst und durch eine Krümmung der Walze 06 reduziert. Um die Walze 06 zu krümmen, drücken die Stellglieder 11 mit einer Kraft auf die verlängerten Endabschnitte 14 der Achse 08 und üben dadurch eine Kraft auf die Achse 08 aus. Diese Kraft wird über die Wälzlager 17 auf den Mantel 09 übertragen, der sich hierdurch verbiegt. Die Wälzlager 17 stellen sicher, dass trotz der erheblichen Druck und Verformungskräfte der Mantel 09 leicht drehbar bleibt. Sie sind vorzugsweise als Zylinderrollenlager 17 ausgebildet, um ein Verkanten des Mantels 09 an der Achse 08, das die Drehbarkeit beeinträchtigen könnte, zu verhindern. In Folge der Verkrümmung der Walze 06 haben in einem mittleren Bereich der Papierbahn 04 befindliche Punkte längere Wege von der Walze 06 zum Druckspalt 03 zurückzulegen, als Punkte in den Randbereichen der Papierbahn 04. Dies ist in den Fig. 5 und 6 verdeutlicht.The second-order terms of the registration error are in particular detected by the central sensor 13 and reduced by a curvature of the roller 06. To curve the roller 06, the actuators 11 press with a force on the extended end portions 14 of the axle 08 and thereby exert a force on the axle 08 from. This force is transmitted via the roller bearings 17 on the jacket 09, which bends thereby. The bearings 17 ensure that despite the considerable pressure and deformation forces the jacket 09 remains easily rotatable. They are preferably formed as a cylindrical roller bearing 17 to prevent tilting of the jacket 09 on the axis 08, which could affect the rotatability. As a result of the curvature of the roller 06 points located in a central region of the paper web 04 longer distances from the Roller 06 to the nip 03 to cover, as points in the edge regions of the web 04. This is in the FIGS. 5 and 6 clarified.

In den Fig. 5 und 6 sind der durch den Formzylinder 01 und den Gegendruckzylinder 02 gebildete Druckspalt 03, die Walze 06 und die durch den Druckspalt 03 geführte und die Walze 06 umschlingende Papierbahn 04 für verschiedene Krümmungen der Walze 06 dargestellt. Die Walze 06 ist im Abstand a vom Druckspalt 03 angeordnet. In Fig. 5 ist die Walze 06 schwächer gekrümmt, in Fig. 6 ist sie stärker gekrümmt. Zur Verdeutlichung der Situation sind die Krümmungen der Walze 06 in den Figuren stark übertrieben. In Fig. 5 ist mit h ein Abstand des höchsten Punktes zum niedrigsten Punkt des Ballens der Walze 06 bezeichnet. Die Größe h stellt somit ein Maß für die Krümmung h der Walze 06 dar.In the FIGS. 5 and 6 are the pressure gap 03 formed by the forme cylinder 01 and the impression cylinder 02, the roller 06 and the guided through the nip 03 and the roller 06 looping paper web 04 shown for different curvatures of the roller 06. The roller 06 is arranged at a distance a from the printing gap 03. In Fig. 5 the roller 06 is less curved, in Fig. 6 she is more curved. To clarify the situation, the curvatures of the roller 06 in the figures are greatly exaggerated. In Fig. 5 H is a distance of the highest point to the lowest point of the bale of the roller 06. The size h thus represents a measure of the curvature h of the roller 06.

Vorzugsweise verläuft die Richtung der Krümmung in der Nähe (d. h. +/- 25°, insbesondere +/-10°) der Richtung der Winkelhalbierenden des Umschlingmgswinkels (α beträgt mindestens 45°, besser mindestens 90°, aber vorzugsweise zwischen 95° und 115°).Preferably, the direction of the curvature in the vicinity (ie +/- 25 °, in particular +/- 10 °) of the direction of the bisector of Umschlingmgswinkels (α is at least 45 °, more preferably at least 90 °, but preferably between 95 ° and 115 ° ).

Wegen der Krümmung der Walze 06 wird die Papierbahn 04 durch die Walze 06 zur Mitte hin ausgebeult. Daraus resultiert in Fig. 5 für mittlere Punkte der Papierbahn 04 eine Weglänge I von der Walze 06 zum Druckspalt 03. Diese Weglänge I ist größer als der Abstand a, der von den am Rand befindlichen Punkten der Papierbahn 04 von der Walze 06 zum Druckspalt 03 zurückgelegt werden muss. Je näher ein Punkt der Mitte der Papierbahn 4 ist, um so später kommt er daher beim Druckspalt 03 an.Because of the curvature of the roller 06, the paper web 04 is bulged by the roller 06 towards the center. This results in Fig. 5 for mean points of the paper web 04, a path length I from the roller 06 to the printing nip 03. This path length I is greater than the distance a, which must be covered by the edge points of the paper web 04 from the roller 06 to the printing nip 03. The closer a point is to the middle of the paper web 4, the later it will therefore arrive at the nip 03.

Wird die Walze 06 wie in Fig. 6 gezeigt stärker verkrümmt, dann vergrößert sich die Krümmung h auf h'. Es vergrößert sich für mittige Punkte auf der Papierbahn 04 auch die Weglänge I auf die Weglänge I'. Bei stärkerer Krümmung h' der Walze 06 kommen die mittigen Punkte daher noch später im Druckspalt 03 an als Punkte im Randbereich der Papierbahn 04. Somit lässt sich über eine Einstellung der Krümmung h; h' der Walze 06 einstellen, um wieviel mittige Punkte der Papierbahn 04 später im Druckspalt 03 ankommen als im Randbereich der Papierbahn 04 befindliche Punkte. Alternativ kommen die äußeren Punke früher als die mittigen Punkte an In Laufrichtung der Materlalbahn 04. Dies erlaubt es, Terme zweiter oder höherer Ordnung des Passerfehlers gezielt zu reduzieren.Will the roller 06 as in Fig. 6 shown more curved, then the curvature h increases to h '. It increases for central points on the paper web 04 and the path length I on the path length I '. With greater curvature h 'of the roller 06, the central points therefore arrive even later in the printing gap 03 than points in the edge region of the paper web 04. Thus, setting the curvature h; h 'of the roller 06 set how many central points of the paper web 04 later arrive in the nip 03 as located in the edge region of the paper web 04 points. Alternatively, the outer pits arrive earlier than the central points in the direction of the material web 04. This makes it possible to purposefully reduce terms of the second or higher order of the registration error.

Ebenso ist es möglich auf Antriebsseite eine Verstellung h / h', in der Maschinenmitte eine Verstellung 0 und auf der Bedienungsseite der Maschine eine Verstellung h / h' in entgegengesetzter Richung einzustellen. Somit kann die Drucklinie über die Maschinenbreite als S-Linie ausgeführt werden.It is also possible on the drive side an adjustment h / h ', in the middle of the machine an adjustment 0 and on the operating side of the machine to adjust an adjustment h / h' in the opposite direction. Thus, the print line can be executed over the machine width as S-line.

In Fig. 7 ist eine alternative Ausgestaltung der Walze 06 dargestellt. Auch diese Walze 06 umfasst eine hohle Achse 08 und einen um diese Achse 08 drehbaren elastischen Mantel 09. Bei dieser Ausführung sind jedoch Stellglieder 18 innerhalb der Walze 06 an der Achse 08 angeordnet. Die Stellglieder 18 umfassen Wälzlager 17, mit denen sie von innen gegen den Mantel 09 drücken und diesen somit verbiegen. Dabei stellen die Wälzlager 17 sicher, dass der Mantel 09 möglichst reibungsfrei auf den Stellgliedern 18 abrollen kann.In Fig. 7 an alternative embodiment of the roller 06 is shown. This roller 06 also comprises a hollow axle 08 and an elastic casing 09 rotatable about this axle 08. In this embodiment, however, actuators 18 are arranged on the axle 08 within the roller 06. The actuators 18 include bearings 17 with which they press from the inside against the jacket 09 and thus bend it. In this case, the bearings 17 ensure that the jacket 09 can roll as smoothly as possible on the actuators 18.

Bei einer weiterführenden Ausgestaltung der in Fig. 5 gezeigten Walze 06 sind diametral zu den gezeigten Stellgliedern 18 zweite Stellglieder 18 an der Achse 08 vorgesehen. Die Stellgleider 18 können einzeln oder gruppenweise angesteuert werden. So ist es möglich, durch gruppenweises Ansteuern der Stellglieder 18 die Walze 06 auf eine grob S-förmige Form zu verbiegen. Zusätzlich oder alternativ zu den zweiten Stellgliedern 18 können auch dritte Stellglieder 18 an der Achse 08 vorgesehen werden, die in einer zur Wirkungslinie der gezeigten Stellglieder 18 senkrechten Richtung oder in einer Richtung, die mit der Wirkungslinie der gezeigten Stellglieder 18 einen beliebigen Winkel bildet, wirken. Eine darart ausgestaltete Walze 06 läßt sich sogar zu einer in Längsrichtung der Walze 06 beliebigen gewundenen Form verbiegen.In a further embodiment of the in Fig. 5 shown roller 06 are provided diametrically to the actuators 18 shown second actuators 18 on the axis 08. The actuators 18 can be controlled individually or in groups. Thus, it is possible, by group-wise driving the actuators 18, the roller 06 to bend to a roughly S-shaped form. In addition to or as an alternative to the second actuators 18, third actuators 18 may also be provided on the axle 08 which act in a direction perpendicular to the line of action of the actuators 18 shown or in a direction which forms any angle with the line of action of the actuators 18 shown , A roller 06 configured in this way can even be bent to an arbitrary tortuous shape in the longitudinal direction of the roller 06.

Auf einer Materialbahn 04 sind, wie in Figuren 8 oder 9 dargestellt, mehrere Bildelemente aufgedruckt. Vorzugsweise sind In axialer Richtung mehrere erste Bildelemente nebeneinander in einem ersten Druckwerk und korrespondierende zweite Bildelemente in einem zweiten Druckwerk aufgedruckt. Die dargestellte Walze 06, insbesondere Bahnleitwalze 06, gehört zu dem zweiten Druckwerk. Durch Durchbiegung der Walze 06 insbesondere senkrecht zur Laufrichtung der Materialbahn 04 werden die Bildelemente des zweiten Druckwerks relativ zu den Bildelementen des ersten Druckwerks entgegen bzw. in Laufrichtung verschoben.On a web 04 are, as in FIGS. 8 or 9 shown, several pixels printed. In the axial direction, a plurality of first picture elements are preferably printed side by side in a first printing unit and corresponding second picture elements are printed in a second printing unit. The illustrated roller 06, in particular web guide roller 06, belongs to the second printing unit. By deflection of the roller 06 in particular perpendicular to the running direction of the material web 04, the picture elements of the second printing unit are displaced relative to the picture elements of the first printing unit or in the direction of travel.

Entsprechend der Durchbiegung wird die Position der mittleren Bildelemente relativ zu der Position der beiden äußeren Bildelemente verändert. In einem anderen, nicht dargestellten Beispiel weist die Materialbahn 04 mindestens vier Gruppen von Bildelementen auf, die jeweils von einem Druckwerk aufgedruckt werden. Mindestens drei dieser mindestens vier Druckwerke ist jeweils eine durchbiegbare Walze 06 zugeordnet. Die Auswertung dieser Gruppe von Bildelementen kann von mindestens einem Sensor 13; 23 erfolgen, der mindestens jeweils ein Bildelement der mindestens vier Druckwerke auswertet. In Abhängigkeit der Signale oder des Signals eines Sensors 13; 23 werden Stellelemente für die Durchbiegung von mindestens drei Walzen 06 betätigt.Corresponding to the deflection, the position of the middle picture elements is changed relative to the position of the two outer picture elements. In another example, not shown, the material web 04 has at least four groups of picture elements, each of which is printed by a printing unit. At least three of these at least four printing units are each assigned a deflectable roller 06. The evaluation of this group of picture elements can be performed by at least one sensor 13; 23 carried out, which evaluates at least one pixel of the at least four printing units. Depending on the signals or the signal of a sensor 13; 23 actuating elements for the deflection of at least three rollers 06 are actuated.

Anstelle einer durchgehenden Walze kann auch eine Walze mit einzelnen Ballenabschnitten 26 oder von einer gekrümmten, z. B. radförmigen Verformungselementen 26 die zueinander verstellt werden können, verwendet werden (Fig. 10).Instead of a continuous roller and a roller with individual bale sections 26 or a curved, z. B. wheel-shaped deformation elements 26 which can be adjusted to each other, are used ( Fig. 10 ).

Auch ist eine Verformung berührungslos, insbesondere mittels Druckluft, z. B. durch Einstellung der Luftmenge und/oder des Luftdruckes oder durch eine Abstandsversänderung einer Luftaustrittsöffnung möglich.Also, a deformation is contactless, in particular by means of compressed air, for. B. by adjusting the amount of air and / or air pressure or by changing the distance of an air outlet opening possible.

Die Verformung der Materialbahn 04 infolge der krümmbaren Walzen 06 oder Verformungslementen 26 erfolgt am Ort der Verformung senkrecht zur Laufebene der Materialbahn 04.The deformation of the material web 04 as a result of the foldable rollers 06 or deformation elements 26 takes place at the location of the deformation perpendicular to the running plane of the material web 04.

Die Walze 06 ist in einer Richtung verformbar, die in einem Bereich von +/- 25°, insbesondere von +/-10 zu einer Winkelhalbierenden des Umachlagswinkels α liegt.The roller 06 is deformable in a direction which is in a range of +/- 25 °, in particular of +/- 10 to an angle bisector of Umachlagswinkels α.

Die Verformung der Materialbahn 04 mittels der Walze 06 oder Verformungselementen 26 erfolgt vorzugsweise in keinem Druckspalt 03.The deformation of the material web 04 by means of the roller 06 or deformation elements 26 preferably takes place in no pressure gap 03.

Zusätzlich zu der Einstellung des Passers in Laufrichtung der Materialbahn (04) kann eine Einstellung des Passers quer zur Laufrichtung (z. B. Temperaturänderung, insbesondere Erhöhung bewirkt Schrumpfen in einem Trockner zwischen zwei Druckspalten und/oder Einbringen von Feuchtigkeit z.B. mittels gesättigtem Wasserdampf, zur Verbreiterung der Bahn) erfolgen.Vorzugsweise erfolgt zuerst eine Regelung /Einstellung des Passers in Laufrichtung und dann eine Regelung/Einstellung des Passers quer zur Laufrichtung der Bahn.In addition to the adjustment of the register in the direction of travel of the material web (04), adjustment of the register transversely to the direction of travel (eg temperature change, in particular increase causes shrinkage in a dryer between two pressure gaps and / or introduction of moisture, for example by means of saturated water vapor) Preferably, first a control / adjustment of the passport in the direction of travel and then a regulation / adjustment of the passport takes place transversely to the running direction of the web.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

0101
Formzylinderform cylinder
0202
GegendruckzylinderImpression cylinder
0303
Druckspaltnip
0404
Materialbahn, PapierbahnMaterial web, paper web
0505
--
0606
Walze, Durchdrückwalze, BahnleitwalzeRoller, push-through roller, web guide roller
0707
Umlenkwalzedeflecting
0808
Achseaxis
0909
Mantelcoat
1010
--
1111
Stellgliedactuator
1212
Auswerteeinheitevaluation
1313
Sensorsensor
1414
Endabschnittend
1515
--
1616
Lager, WälzlagerBearings, Rolling Bearings
1717
Lager, Wälzlager, ZylinderrollenlagerBearings, roller bearings, cylindrical roller bearings
1818
Stellgliedactuator
1919
Gestellframe
2020
--
2121
Achseaxis
2222
Exzenterlagereccentric
2323
Sensorsensor
2424
--
2525
--
2626
Verformungselementflexure
2727
Richtungdirection
aa
Abstanddistance
hH
Krümmung, VerstellungCurvature, adjustment
h'H'
Krümmung, VerstellungCurvature, adjustment
II
Weglängepath length
I'I '
Weglängepath length
αα
UmschlingungswinkelWrap angle

Claims (57)

  1. Method for reducing register errors on a web of material (04) moving through a printing nip (03) in a multicolour drum rotary printing press, comprising the steps:
    adjustment of a deformation between a region of the web of material (04) present between two lateral edges of the web of material (04) and regions of the web of material (04) present in the vicinity of the lateral edges, relative to one another in a direction perpendicular to the plane of movement of the web of material (04) as a function of a register error occurring in the running direction of the web of material (04), and in that the curvature (h; h') of the deformation is adjusted in such a way that a register error in the middle of the web of material (04) is changed relative to at least one side of the web of material (04) in the running direction of the web of material (04).
  2. Method according to Claim 1, characterized in that the adjustment of the deformation is effected by adjusting a relative position of at least two deformation elements (26) close to lateral edges and at least one deformation element (26) present in between as a function of a register error occurring in the running direction.
  3. Method for reducing register errors on a web of material (04) moving through a printing nip (03) in a multicolour drum rotary printing press, comprising the steps:
    adjustment of a curvature (h; h') of a bendable roller (06) around which the web of material (04) is at least partly wrapped with an angle of wrap (α), as a function of a register error occurring in the running direction of the web of material (04).
  4. Method according to Claim 3, characterized in that the adjustment is effected by means of the roller (06) arranged on the entrance site before the printing nip (03).
  5. Method according to Claim 1 or 3, characterized in that a register error occurring on the web of material (04) on the exit side after the printing nip (03) is detected.
  6. Method according to Claim 3, characterized in that the curvature (h; h') of the deformation is adjusted in such a way that a register error in the middle of the web of material (04) is changed relative to at least one side of the web of material (04) in the running direction of the web of material (04).
  7. Method according to Claim 1, 2 or 3, characterized in that the curvature (h; h') is adjusted in such a way that a register error in the region of at least one side of the web of material (04) is changed relative to a region in the middle of the web of material (04) in the running direction of the web of material (04).
  8. Method according to Claim 3, characterized in that a displacement of the roller (06) is additionally effected for changing a length of the web running distance.
  9. Method according to Claim 3, characterized in that pivoting of the roller (06) is additionally effected.
  10. Method according to any of the preceding claims, characterized in that the register error is detected on the running web of material (04).
  11. Method according to any of the preceding claims, characterized in that the curvature (h; h') of the roller (06) or deformation is adjusted while the web of material (04) is running.
  12. Method according to Claim 6 or 7, characterized in that the register error is changed relative to both sides of the web of material (04).
  13. Method according to Claim 3, characterized in that curvature (h; h') of the roller (06) is effected in a convex or concave manner.
  14. Method according to Claim 3, characterized in that curvature (h; h') of the roller (06) is effected in an S-shaped manner.
  15. Method according to any of the preceding claims, characterized in that the register error is detected in a middle region of the web of material (04).
  16. Method according to any of the preceding claims, characterized in that the register error is detected in an edge region of the web of material (04).
  17. Method according to any of the preceding claims, characterized in that a mark is printed on the web of material (04) on which the register error is detected.
  18. Method according to Claim 1, characterized in that the deformation is effected by means of contact elements.
  19. Method according to Claim 1, characterized in that the deformation is effected by means of compressed air.
  20. Method according to Claim 19, characterized in that the deformation is adjusted by an amount of air and/or air pressure acting on the web of material (04).
  21. Method according to Claim 19, characterized in that the deformation is adjusted by a change of distance of an air outlet opening relative to the web of material (04).
  22. Method according to Claim 3, characterized in that the roller (06) is deformed in a direction which is in a range of +/-25°, in particular of +/-10°, to an angle bisector of the angle of wrap (α).
  23. Use of a device in a multicolour drum rotary printing press, at least two printing units of the multicolour drum rotary printing press being arranged in printing nips (03) so as to print on a web of material (04), a bendable roller (06) which is arranged on the entry side of one of the printing units and around which the web of material (04) wraps at least partly with an angle of wrap (α) during operation of the printing unit being arranged so as to reduce register errors, at least one actuator (11; 18) being arranged for adjusting a curvature (h; h') of the bendable roller (06), characterized in that the curvature of the roller (06) is adjusted as a function of a register error occurring in the running direction of the web of material (04).
  24. Use of a device in a multicolour drum rotary printing press, at least two printing units of the multicolour drum rotary printing press being arranged in printing nips (03) so as to print on a web of material (04), a device (06) comprising a plurality of deformation elements (26) for deforming the web of material (04) being provided at least at one of the printing units, perpendicular to the running direction of the web of material (04), so as to reduce register errors, at least one deformation element (26) in each case being arranged so as to act on the two edge regions of the web of material (04), and at least one third deformation element (26) arranged between the two outer deformation elements (26) being arranged so as to act on the web of material (04), the two outer deformation elements (26) and the third deformation element (26) being adjustable relative to one another and perpendicular to the plane of movement of the web of material (04), at least one actuator (11; 18) being arranged for adjusting the position of the deformation elements (26), characterized in that the deformation elements (26) are adjusted as a function of a register error occurring in the running direction of the web of material (04), and in that at least one device is additionally arranged for changing the width of the web of material (04).
  25. Use of a device according to Claim 24, characterized in that the web of material (04) wraps at least partly around the deformation elements (26) with an angle of wrap (α).
  26. Use of a device according to Claim 23 or 24, characterized in that at least one actuator (11; 18) is arranged for adjusting a curvature (h; h') of the bendable roller (06) or the position of the deformation elements (26).
  27. Use of a device according to Claim 23 or 26, characterized in that two actuators (11; 18) acting on one end region each of the roller (06) are arranged.
  28. Use of a device according to Claim 23, characterized in that at least one end of the roller (06) and another region of the roller (06) are deformed relative to one another.
  29. Use of a device according to Claim 28, characterized in that both ends of the roller (06) and a region of the roller (06) which is located in between are deformed relative to one another.
  30. Use of a device according to Claim 23 or 29, characterized in that the roller (06) has a convex or concave shape.
  31. Use of a device according to Claim 23 or 29, characterized in that the roller (06) has an S shape.
  32. Use of a device according to Claim 23 or 24, characterized in that at least one sensor (13; 23) arranged on the exit side of the printing nip (03) is arranged for detecting a register error on the web of material (04).
  33. Use of a device according to Claim 26 or 32, characterized in that an evaluation unit (12) which is connected to the sensor (13; 23) and which is connected to the actuator (11; 18), for initiating a change in the curvature (h; h') of the bendable roller (06) or deformation elements (26) as a function of the detected register error, is arranged.
  34. Use of a device according to Claim 23, characterized in that the bendable roller (06) comprises an axle (08) and a lateral surface (09), the lateral surface (09) being rotatable about the axle (08).
  35. Use of a device according to Claim 34, characterized in that the lateral surface (09) is supported centrally by the axle (08) and at its ends by a frame (19), and an actuator (11) is supported, on the one hand on the frame (19) and, on the other hand, engages the axle (08).
  36. Use of a device according to Claim 26 or 34, characterized in that the actuator (18) is arranged within the roller (06), between axle (08) and lateral surface (09), and engages the axle (08) on the one hand and the lateral surface (09) on the other hand.
  37. Use of a device according to Claim 23, characterized in that the bendable roller (06) is mounted at two ends in a frame (19), one end of the roller (06) being adjustable independently of the other.
  38. Use of a device according to Claim 23 or 37, characterized in that at least one cam is arranged for adjusting the curvature (h; h') of the roller (06).
  39. Use of a device according to Claim 23, characterized in that the bendable roller (06) is mounted, on at least one side, in an eccentric bearing (22) in the frame (19).
  40. Use of a device according to any of Claims 23 to 39, characterized by a deflection roller (07) which is arranged before the bendable roller (06), relative to a running direction of the web of material (04), and is displaceable for adjusting the wrapping of the web of material (04) around the bendable roller (06).
  41. Use of a device according to Claim 23 or 24, characterized in that at least one sensor (13) detects the register error in a middle region of the web of material (04).
  42. Use of a device according to either of Claims 23 or 24, characterized in that at least one sensor (23) detects the register error in an edge region of the web of material (04).
  43. Use of a device according to either of Claims 23 or 24, characterized in that the device is part of a rotary gravure press.
  44. Use of a device according to Claim 23, characterized in that the angle of wrap around the roller (06) is at least 45° in the circumferential direction.
  45. Use of a device according to Claim 23, characterized in that the angle of wrap around the roller (06) is at least 90° in the circumferential direction.
  46. Use of a device according to Claim 23, characterized in that the angle of wrap around the roller (06) is between 95° and 115° in the circumferential direction.
  47. Use of a device according to Claim 24, characterized in that the deformation elements (26) are in the form of cylindrical body sections of a roller (06).
  48. Use of a device according to Claim 24, characterized in that the deformation elements (26) have a wheel-like design.
  49. Use of a device according to claim 24, characterized in that the deformation elements (26) are formed so as to be contact-free.
  50. Use of a device according to Claim 24, characterized in that the deformation elements (26) are fed with compressed air.
  51. Method according to Claim 3 or use of a device according to Claim 23, characterized in that a direction (27) of curvature of the roller (06) is perpendicular to the plane of movement of the web of material (04) at the location of the curvature.
  52. Use of a device according to Claim 23, characterized in that at least one device for changing the width of the web of material (04) is additionally arranged.
  53. Use of a device according to Claim 24 or 52, characterized in that this device is arranged so as to produce a temperature change in the web of material (04).
  54. Use of a device according to Claim 24 or 52, characterized in that this device is arranged so as to produce a change in the moisture content of the web of material (04).
  55. Method according to Claim 1 or 3 or use of the device according to Claim 23 or 24, characterized in that first the register in the running direction of the web of material (04) is regulated and then the register transverse to the running direction of the web of material (04) is regulated.
  56. Method according to Claim 1 or 3 or use of the device according to Claim 23, characterized in that a change of position of the two ends of the roller (06) by an equal distance is additionally effected.
  57. Method according to Claim 1 or 3 or use of the device according to Claim 23, characterized in that in addition one end of the roller (06) is pivoted relative to the other end of the roller (06).
EP04766674A 2003-09-01 2004-09-01 Method for reducing register errors on a web of material moving through the printing nip of a multicolor web-fed rotary press and corresponding devices Not-in-force EP1660395B1 (en)

Applications Claiming Priority (2)

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DE10340569A DE10340569A1 (en) 2003-09-01 2003-09-01 Method for reducing registration errors on a web-processing device and a printing unit
PCT/EP2004/051995 WO2005023690A1 (en) 2003-09-01 2004-09-01 Method for reducing register errors on a web of material moving through the printing nip of a multicolor web-fed rotary press and corresponding devices

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EP1660395A1 EP1660395A1 (en) 2006-05-31
EP1660395B1 true EP1660395B1 (en) 2009-05-13

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EP (1) EP1660395B1 (en)
JP (1) JP2007503333A (en)
CN (1) CN100515896C (en)
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DE (2) DE10340569A1 (en)
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US20090084281A1 (en) 2009-04-02
WO2005023690A1 (en) 2005-03-17
JP2007503333A (en) 2007-02-22
CN100515896C (en) 2009-07-22
DE502004009487D1 (en) 2009-06-25
RU2006110330A (en) 2007-10-20
CN1845865A (en) 2006-10-11
EP1660395A1 (en) 2006-05-31
US20060288895A1 (en) 2006-12-28
RU2343101C2 (en) 2009-01-10
DE10340569A1 (en) 2005-04-07
ATE431313T1 (en) 2009-05-15
US7497162B2 (en) 2009-03-03

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