EP2498991B1 - Measuring the register in printing machines - Google Patents
Measuring the register in printing machines Download PDFInfo
- Publication number
- EP2498991B1 EP2498991B1 EP10776108.2A EP10776108A EP2498991B1 EP 2498991 B1 EP2498991 B1 EP 2498991B1 EP 10776108 A EP10776108 A EP 10776108A EP 2498991 B1 EP2498991 B1 EP 2498991B1
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- EP
- European Patent Office
- Prior art keywords
- register
- printing plate
- printing
- strip
- sensor head
- 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.)
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Links
- 238000005259 measurement Methods 0.000 claims description 11
- 238000012935 Averaging Methods 0.000 claims 1
- 230000004069 differentiation Effects 0.000 claims 1
- 238000000034 method Methods 0.000 description 17
- 239000000463 material Substances 0.000 description 8
- 230000001681 protective effect Effects 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 238000007774 anilox coating Methods 0.000 description 3
- 239000012876 carrier material Substances 0.000 description 3
- 239000003550 marker Substances 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 239000006187 pill Substances 0.000 description 3
- 239000000969 carrier Substances 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- VAYOSLLFUXYJDT-RDTXWAMCSA-N Lysergic acid diethylamide Chemical compound C1=CC(C=2[C@H](N(C)C[C@@H](C=2)C(=O)N(CC)CC)C2)=C3C2=CNC3=C1 VAYOSLLFUXYJDT-RDTXWAMCSA-N 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F5/00—Rotary letterpress machines
- B41F5/24—Rotary letterpress machines for flexographic printing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F13/00—Common details of rotary presses or machines
- B41F13/08—Cylinders
- B41F13/10—Forme cylinders
- B41F13/12—Registering devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F33/00—Indicating, counting, warning, control or safety devices
- B41F33/0081—Devices for scanning register marks
Definitions
- the invention relates to a strip-shaped body which can be applied to a printing plate cylinder of a flexographic printing press.
- the register is set between the printing plate cylinders in the inking units on the basis of measuring signals concerning the position of bodies carried by the printing form or the printing form carrier.
- the bodies are the magnetic pills in the printing forms.
- One of the disadvantages of such a method is that the measurement of the position of the magnetic pill in a printing form is complicated and magnetic measuring methods are unusual in printing technology.
- the measurement of the printing plate cylinder in an external horizontal bar an additional operation, which costs time and is expensive.
- a body or a mark is applied to the printing form or the printing plate carrier.
- marking the mark is used like a register mark.
- a marking or register mark is applied to the body. Applied in the sense of the present document means in this case that it is brought to the surface of the printing form carrier and is connected there with her.
- a solid compound, such as an adhesive bond may be meant.
- the body or marking should be in a certain known relative position (at least one control device known) to the Printing plate or the printing plate are applied. Then, by determining the relative position of the marker or the body in the printing unit in which the printing plate cylinder is introduced, to determine the position of the printing plate.
- mounters Such a mounter is among other things of the US 20060117973 A1 shown. Mandrels, pressure rollers or adapter sleeves are often clamped in these devices. Clichés are then often clamped or glued onto these bodies. It is also known to provide further printing form-carrying sleeves between the first mentioned printing form carriers and the clichés. The mounters are equipped with optical and mechanical devices that allow accurate positioning of the clichés on the surface of the printing form carriers.
- a reference point (often called a microdot) is provided on the cliché, which allows the cliché in turn to be positioned exactly to the printing form.
- an accurate positioning of the additional body on the printing plate carrier or the printing plate can be carried out.
- the additional body may be attached to, among other things, the surface of the printing plate cylinder, the plate, or other objects fixedly mounted on the printing plate cylinder. It is regarded as advantageous in this case if the body or markings applied to the body are to be seen, or if they can be seen with optical sesors.
- optical sensors also includes sensors that detect electromagnetic radiation that is out of the visible range.
- markings can be introduced by engraving tools into the relevant surface (again the printing plate cylinder, the plate or other objects fixedly mounted on the printing plate cylinder). Also advantageous is the use of devices that print the surfaces concerned. For example, in this case, ink-jet heads - as used in ink-jet printers - can be used. Especially when using engraving and printing processes can be achieved by automation processes in the application of the markers and accuracy gains in the positioning of the same.
- the working position of the sensors will be in areas of the inking unit, in which it can lead to contamination of the sensors by paint mist and splashes and the like. Therefore, it is advantageous if the sensors can be removed from these areas of the inking unit.
- the sensors can when they are in the working position For example, you can obtain measurements for a pre-registration. You can also gain register readings in the current printing process. The latter will be more of an exception, especially for central-cylinder printing presses.
- the transport device will pivot the register mark sensors about a rotation axis out of the exposed areas of the inking unit. It has been shown that it is advantageous to tilt this axis of rotation relative to the base frame of the associated inking unit (angle deviating from 90 °).
- the register mark sensors 15 and sensor heads 14, which may well be contaminated in their working position with paint splashes and the like, can be cleaned in the pivoted position among other things.
- a protective housing for the sensor 15 or at least the sensor head 14 may be present. This protective housing protects the sensor 15 or at least the sensor head 14 from further contamination. In such a protective housing, the sensor can also make a comparison: Thus, in the protective housing a wall may be present, the same colored as z. B.
- the sensor can check whether it receives light still of remit with the original intensity from this wall, if - as originally - it emits light with a certain intensity on the wall. If this is no longer the case, then the radiation output or the radiation input of the sensor 15 or at least of the sensor head 14 (often well both) is contaminated. Due to the changes in the measured values, a control and computing unit can recalibrate the sensor. A supplement or alternative to this procedure is an automatic cleaning, which can be carried out, for example, when a certain deviation of the measured values from the initial value is exceeded by the correspondingly set control and computing unit. However, the control and computing unit can also issue a warning signal to the machine personnel, which causes this to clean the sensor 15 or at least the sensor head 14.
- the body is a strip of material whose longitudinal axis is preferably aligned in the circumferential direction of the roller. On the body advantageously an even number of marks or marks are applied.
- a symmetrical design of the marker field with respect to a reference point allows differential measurement.
- the mean value between position values of two points arranged symmetrically to a reference point will be determined in order to minimize the effect of measurement errors resulting from an inaccurate arrangement of the body to the printing form.
- Fig. 1 shows a strip-shaped additional body 1. This carries a plurality of marks 2, 2 ', 3, 3', 4, 4 ', 5, 5', which are arranged and shaped symmetrically with respect to the reference point 6.
- the strip-shaped body 1 is intended to be aligned with its longitudinal direction in the circumferential direction ⁇ of a format cylinder 11.
- the arrangement and orientation of the strip allows a differential measurement between the symmetrically arranged to the reference point 6 pairs of points n, n '. By this differential measurement, it is possible to minimize errors that occur due to inaccuracies in the orientation of the body on the printing plate or the printing form.
- edges of the marks 2 and 2 ' which are oblique to the direction of rotation ⁇ of the forme cylinder 11 serve for lateral registration.
- the other brands are used for longitudinal registration. It is advantageous to make the marks 2 and 2 'black and the background white. It is also advantageous to provide marks with a rectangular and / or triangular shape.
- FIG. 2 shows a schematic side view of three inking units 10 a Monzylinderflexodruckmaschine 26.
- Typical components of such a machine are the central impression cylinder 13 and the format cylinder 11 and the anilox rollers 12 of the individual inking units 10.
- the format cylinder 11 and the anilox rollers 12 are each turned off.
- the arrows 19 symbolize the Anstellraum the cylinder.
- FIG. 3 the region of an inking unit 10 marked by the line AA can be seen from the line of sight sketched by the arrow 20.
- FIG. 3 is in addition to those already in FIG. 2 features shown, the machine frame 17, the cliché 18 and the light guide 16 and sensor 15 to see.
- FIG. 4 shows the inking unit 10 from the same direction as FIG. 3 , From the transport device 25 of the sensor or the sensor head 14 of the arm 22 and the axis of rotation 23 can be seen.
- the arrow 24 shows the Swivel direction of the sensor head.
- the pivoting takes place about an axis 23.
- This axis is also in FIG. 2 located.
- the angle between the axis 22 and the base of the inking unit 21 is not a right angle.
- the sensor device as a whole consists of the sensor head 14, the light guide 16 and the sensor 15. Such an arrangement is advantageous when it comes to positioning the sensor head 14 in a chemically critical atmosphere and the sensor 15, with its critical components outside this range to place.
- the sensor head can then collect the light remitted by the register marks 2, 2 'or the additional body 1 or other part of the format cylinder 11, and the light guide will send it to the sensor 15.
- the light also feeds the sensor head 14 via the light guide 15, which serves to illuminate the environment of the register marks.
- FIG. 5 shows a format cylinder 11 which is clamped in a Mounter, not shown.
- the cliché 18 has been applied positionally accurate on the format cylinder 11.
- the orientation of the cliché is an often imaginary line 31 along which the receiving area of the camera or visual aid 7 can be moved by advancing them in their directions of movement 8.
- the camera can thus "approach" fixed points on the format cylinder (its focused catch area is set to this point) by being displaced in the axial direction z of the format cylinder and by rotating the format cylinder in its circumferential direction ⁇ .
- the change in the axial position z of the camera 7 can be measured with a length sensor.
- the rotation angle change of the format cylinder can be measured with a rotation angle sensor of the mounter, so that with a known diameter of the format cylinder and the distance amounts in the circumferential direction ⁇ are to be determined. In this way, with the help of the mounter and its camera 7 positions can be approached at desired distances from each other on the surface of the format cylinder.
- the operator of the mounter can thus position the cliché 18 and the additional body 1 at a desired distance from each other (eg by aligning and gluing).
- microdots 32 are often used.
- format cylinders 11 are on their drive side (here in FIG. 5 left) provided with a stop 27 against which a sleeve or a cliché can be made and the 27 limits the Aufschiebeporgang the sleeve on the format cylinder.
- a plurality of additional bodies 1 are applied to a tape material 28 (the additional bodies are in the foreground from the viewer's point of view).
- the additional body 1 are self-adhesive on its back. They can be withdrawn by the machine personnel from the strip material 28 and applied to the format cylinder 11. It is advantageous to perforate the band-shaped carrier material 28 or to weaken it in another way, so that predetermined tear lines are formed. Through the horizontal perforation lines 30, the machine personnel can separate individual additional body 1 and their associated carrier material 28. By means of the vertical perforation lines 29, it can release successive parts of the self-adhesive surface of the additional bodies 1.
- the band-shaped material 28 can be wound up into rolls with the additional bodies. Such a role brings many benefits.
- a control unit which is set to drive machine components to carry out the methods.
- Camera of the mounter 8th Arrows in the direction of movement of the camera of the mounter 9 10 inking 11 format cylinder 12 anilox roller 13
- Impression cylinder 14 sensor head 15 sensor 16 optical fiber 17 machine frame 18 cliche 19 Arrow in setting direction 20 Arrow in view Fig.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Inking, Control Or Cleaning Of Printing Machines (AREA)
- Rotary Presses (AREA)
Description
Die Erfindung betrifft einen streifenförmigen Körper, der auf einen Druckplattenzylinder einer Flexodruckmaschine aufbringbar ist.The invention relates to a strip-shaped body which can be applied to a printing plate cylinder of a flexographic printing press.
Zur Abwicklung von Druckaufträgen mit Mehrfarbendruckmaschinen ist es nötig, die Registerlage der Druckplattenzylinder miteinander abzugleichen.
Bei Flexodruckmaschinen - insbesondere bei Zentralzylinderflexodruckmaschinen - wird in der Regel mit Hilfe so genannter Bahn-Bahn-Verfahren die Registereinstellung durchgeführt. Zu der Ausführung dieser Verfahren besitzen die Druckformen, mit denen die einzelnen Druckplattenzylinder gerüstet sind, Registermarkendruckformen, welche den Bedruckstoff mit Registermarken versehen. Wird mit mehreren Farbwerken gleichzeitig gedruckt, so kann die Position, die die von den einzelnen Druckwerken gedruckten Registermarken auf dem Bedruckstoff einnehmen, gemessen werden. Durch eine Korrektur der Winkellage der Druckplattenzylinder zueinander wird während der Längsregistereinstellung ein Sollabstand zwischen den Registermarken eingestellt. Bei der Einstellung des Seitenregisters wird die axiale Lage der Druckplattenzylinder zueinander solange korrigiert, bis auf dem Bedruckstoff wieder Sollabstände zwischen den Registermarken der verschiedenen Druckwerke eingehalten werden.To process print jobs with multicolor printing machines, it is necessary to match the register position of the printing plate cylinders with each other.
In the case of flexographic printing machines - in particular in the case of central-cylinder flexographic printing presses-register registration is generally carried out with the aid of so-called web-web method. In order to carry out these methods, the printing plates with which the individual printing plate cylinders are equipped have register mark printing forms which register the printing material with register marks. If you are printing with more than one inking unit at a time, you can measure the position of the registration marks printed by the individual printing units on the substrate. By correcting the angular position of the printing plate cylinders relative to one another, a desired spacing between the register marks is set during the longitudinal register adjustment. When setting the page register, the axial position of the printing plate cylinder is corrected each other until the printing material again set distances between the register marks of the various printing units are maintained.
Der Druckschrift
- In einer externen Zylinderaufnahme, oft Reck genannt, werden verschiedene Messungen an einem mit einer Flexodruckform gerüsteten Druckplattenzylinder ausgeführt. Mit einer dieser Messungen wird die Position einer Magnetpille, die in die Druckform oder den Druckformträger eingebracht ist, bestimmt.
- In an external cylinder recording, often called a stretching, various measurements are made on a printing plate cylinder equipped with a flexographic printing plate executed. With one of these measurements, the position of a magnetic pill, which is introduced into the printing plate or the printing plate carrier determined.
Später werden mehrere auf diese Weise behandelte Druckplattenzylinder in jeweils ein Farbwerk der Druckmaschine eingebracht. In der Druckmaschine wird die Winkelposition der Magnetpille an dem Druckplattenzylinder gemessen, und es wird die Registerlage der Zylinder zueinander eingestellt.Later, several printing plate cylinders treated in this way are introduced into one inking unit of the printing press. In the printing machine, the angular position of the magnetic pellet is measured on the printing plate cylinder, and the register position of the cylinders is adjusted to each other.
Daher wird bei der
Die Körper sind die in den Druckformen befindlichen Magnetpillen. Zu den Nachteilen eines solchen Verfahrens gehört, dass die Messung der Position der Magnetpille in einer Druckform aufwändig und magnetische Messverfahren in der Drucktechnik unüblich sind. Darüber hinaus bedeutet die Vermessung des Druckplattenzylinders in einem externen Reck einen zusätzlichen Arbeitsgang, der Zeit kostet und aufwändig ist.The bodies are the magnetic pills in the printing forms. One of the disadvantages of such a method is that the measurement of the position of the magnetic pill in a printing form is complicated and magnetic measuring methods are unusual in printing technology. In addition, the measurement of the printing plate cylinder in an external horizontal bar an additional operation, which costs time and is expensive.
Aus der Druckschrift
Es ist Aufgabe der vorliegenden Erfindung, die Nachteile der
Demnach wird ein Körper oder eine Markierung auf die Druckform oder den Druckformträger aufgebracht. Im Falle der Markierung wird die Markierung wie eine Registermarke genutzt. Im Falle des Körpers ist eine Markierung beziehungsweise Registermarke auf den Körper aufgebracht. Aufgebracht im Sinne der vorliegenden Druckschrift heißt hierbei, dass er auf die Oberfläche des Druckformträgers gebracht wird und dort mit ihr verbunden wird. Hierbei kann eine feste Verbindung, wie eine Klebverbindung, gemeint sein.Accordingly, a body or a mark is applied to the printing form or the printing plate carrier. In the case of marking, the mark is used like a register mark. In the case of the body, a marking or register mark is applied to the body. Applied in the sense of the present document means in this case that it is brought to the surface of the printing form carrier and is connected there with her. Here, a solid compound, such as an adhesive bond, may be meant.
Der Körper oder die Markierung sollte in einer bestimmten bekannten Relativposition (zumindest einer Steuervorrichtung bekannten) zu dem Druckformträger oder der Druckplatte aufgebracht werden. Dann ist durch eine Feststellung der relativen Lage der Markierung oder des Körpers in dem Druckwerk, in dem der betreffende Druckplattenzylinder eingebracht wird, auch die Lage der Druckform zu ermitteln.The body or marking should be in a certain known relative position (at least one control device known) to the Printing plate or the printing plate are applied. Then, by determining the relative position of the marker or the body in the printing unit in which the printing plate cylinder is introduced, to determine the position of the printing plate.
Es ist vorteilhaft, den zusätzlichen Köper oder die Markierung beim Rüsten des Druckplattenzylinders auf die Druckform oder den Druckplattenzylinder aufzubringen. Diese Rüstvorgänge werden oft an sogenannten Mountern durchgeführt. Ein solcher Mounter wird unter anderem auch von der
Die Mounter sind mit optischen und mechanischen Vorrichtungen ausgestattet, die ein genaues Positionieren der Klischees auf der Oberfläche der Druckformträger erlauben.It is advantageous to apply the additional body or the mark when equipping the printing plate cylinder on the printing plate or the printing plate cylinder. These setup processes are often performed on so-called mounters. Such a mounter is among other things of the
The mounters are equipped with optical and mechanical devices that allow accurate positioning of the clichés on the surface of the printing form carriers.
In der Regel ist auf den Klischees ein Referenzpunkt (oft Mikropunkt genannt) vorgesehen, der es erlaubt, das Klischee seinerseits genau zur Druckform zu positionieren.
Zur Ausführung des erfindungsgemäßen Verfahrens kann neben der genauen Positionierung des Klischees auf dem Druckformträger auch eine genaue Positionierung des zusätzlichen Körpers auf dem Druckformträger oder der Druckform vorgenommen werden.
In diesem Zusammenhang kann der zusätzliche Körper unter anderem auf die Oberfläche des Druckplattenzylinders, des Klisches oder anderer fest auf dem Druckplattenzylinder angebrachter Gegenstände angebracht werden. Als vorteilhaft wird hierbei angesehen, wenn der Körper oder auf dem Körper aufgebrachte Markierungen zu sehen sind, beziehungsweise wenn sie mit optischen Sesoren erkennbar sind. Der Terminus "optische Sensoren" schließt herbei auch Sensoren ein, die elektromagnetische Strahlung detektieren, die außerhalb des sichtbaren Bereichs liegen. Nichtsdestoweniger ist es vorteilhaft, Sensoren zu verwenden, die in dem Bereich des sichtbaren Lichtes empfindlich sind.
Wenn handelsübliche Mounter geringfügig umgerüstet werden, sind andere Verfahren vorteilhaft: So können Markierungen durch Gravurwerkzeuge in die betreffende Oberfläche (wieder des Druckplattenzylinders, des Klisches oder anderer fest auf dem Druckplattenzylinder angebrachter Gegenstände) eingebracht werden. Vorteilhaft erscheint auch die Verwendung von Vorrichtungen, die die betreffenden Oberflächen bedrucken. So können in diesem Falle u. a. Tintenschreibköpfe - wie sie in Tintenstrahldruckern Verwendung finden - zum Einsatz kommen.
Vor allem bei der Verwendung von Gravier- und Druckverfahren lassen sich durch Automatisierungsvorgänge bei dem Aufbringen der Markierungen auch Genauigkeitsgewinne bei der Positionierung derselben erzielen.As a rule, a reference point (often called a microdot) is provided on the cliché, which allows the cliché in turn to be positioned exactly to the printing form.
For carrying out the method according to the invention, in addition to the exact positioning of the plate on the printing form carrier, an accurate positioning of the additional body on the printing plate carrier or the printing plate can be carried out.
In this connection, the additional body may be attached to, among other things, the surface of the printing plate cylinder, the plate, or other objects fixedly mounted on the printing plate cylinder. It is regarded as advantageous in this case if the body or markings applied to the body are to be seen, or if they can be seen with optical sesors. The term "optical sensors" also includes sensors that detect electromagnetic radiation that is out of the visible range. Nonetheless, it is beneficial Use sensors that are sensitive in the visible light range.
If commercially available mounters are slightly upgraded, other methods are advantageous: For example, markings can be introduced by engraving tools into the relevant surface (again the printing plate cylinder, the plate or other objects fixedly mounted on the printing plate cylinder). Also advantageous is the use of devices that print the surfaces concerned. For example, in this case, ink-jet heads - as used in ink-jet printers - can be used.
Especially when using engraving and printing processes can be achieved by automation processes in the application of the markers and accuracy gains in the positioning of the same.
Herkömmliche Zentralzylinderflexodruckmaschinen sind zur Durchführung des erfindungsgemäßen Verfahrens nicht geeignet. Sie verfügen in der Regel über Registermarkensensoren, die allen Farbwerken nachgeschaltet sind. Sie nehmen eine Arbeitsposition ein, mit der sich der von mehreren oder besser allen Druckwerken bedruckte Bedruckstoff einsehen lässt. Sie inspizieren ein Registermarkenfeld, in dem von jedem Farbwerk eine Marke enthalten ist. Eine Druckmaschine, die das erfindungsgemäße Verfahren ausführt, muss die Relativposition (relative Winkellage) der Druckplattenzylinder (oder besser der Druckplatten beziehungsweise Klischees) zumindest zweier Farbwerke messen. Sie benötigt daher zumindest zwei Registermarkensensoren, die in eine Arbeitsposition zu den Druckplattenzylindern bringbar sind. Die Positionierung der Registermarkensensoren ist nicht unkritisch, da die Anforderungen an die Auflösung, die sich mit den Sensoren erzielen lassen muss, hoch ist.Conventional Zentralzylinderflexodruckmaschinen are not suitable for carrying out the method according to the invention. They usually have register mark sensors downstream of all inking units. They assume a working position with which the printing material printed by several or better of all printing units can be viewed. They inspect a register marker field, which contains a mark of each inking unit. A printing machine which carries out the method according to the invention has to measure the relative position (relative angular position) of the printing plate cylinders (or better of the printing plates or clichés) of at least two inking units. It therefore requires at least two register mark sensors, which can be brought into a working position to the printing plate cylinders. Positioning the register mark sensors is not uncritical because the resolution requirements that must be achieved with the sensors are high.
In der Regel wird die Arbeitsposition der Sensoren in Bereichen des Farbwerkes sein, in denen es zu Verschmutzungen der Sensoren durch Farbnebel und -spritzer und ähnliches kommen kann. Daher ist es von Vorteil, wenn die Sensoren aus diesen Bereichen des Farbwerkes abtransportiert werden können. Die Sensoren können, wenn sie sich in der Arbeitsposition befinden, beispielsweise Messwerte für eine Vorregisterung gewinnen. Sie können auch im laufenden Druckprozess Registermesswerte gewinnen. Letzteres wird insbesondere bei Zentralzylinderdruckmaschinen aber eher die Ausnahme sein.In general, the working position of the sensors will be in areas of the inking unit, in which it can lead to contamination of the sensors by paint mist and splashes and the like. Therefore, it is advantageous if the sensors can be removed from these areas of the inking unit. The sensors can when they are in the working position For example, you can obtain measurements for a pre-registration. You can also gain register readings in the current printing process. The latter will be more of an exception, especially for central-cylinder printing presses.
Vorteilhafterweise wird die Transportvorrichtung die Registermarkensensoren um eine Drehachse aus den exponierten Bereichen des Farbwerkes herausschwenken. Es hat sich gezeigt, dass es vorteilhaft ist, diese Drehachse gegenüber dem Grundgestell des zugehörigen Farbwerks zu neigen (Winkel abweichend von 90 °).
Die Registermarkensensoren 15 bzw. Sensorköpfe 14, die in in ihrer Arbeitsstellung durchaus mit Farbspritzern und Ähnlichem verunreinigt werden können, können in der abgeschwenkten Stellung unter anderem gereinigt werden. In einer abgeschwenkten Stellung kann eine Schutzeinhausung für den Sensor 15 oder zumindest den Sensorkopf 14 vorhanden sein. Diese Schutzeinhausung schützt den Sensor 15 oder zumindest den Sensorkopf 14 vor weiterer Verunreinigung. In einer solchen Schutzeinhausung kann der Sensor auch einen Abgleich vornehmen: So kann in der Schutzeinhausung eine Wand vorhanden sein, die genauso gefärbt wie z. B. ein Teil des zusätzlichen Körpers. Dann kann der Sensor prüfen, ob er von dieser Wand noch remittiertes Licht mit der ursprünglichen Intensität empfängt, wenn er - wie ursprünglich auch - Licht mit einer gewissen Intensität auf die Wand abgibt.
Ist dies nicht mehr der Fall, so ist der Strahlungsausgang oder der Strahlungseingang des Sensors 15 oder zumindest des Sensorkopfes 14 (häufig wohl beides) verunreinigt.
Aufgrund der Änderungen der Messwerte kann eine Steuer- und Recheneinheit den Sensor rekalibrieren. Eine Ergänzung oder Alternative zu diesem Vorgehen liegt in einer automatischen Reinigung, die beispielsweise beim Überschreiten einer gewissen Abweichung der Messwerte von dem Ausgangswert von der entsprechend eingestellten Steuer- und Recheneinheit vorgenommen werden kann. Die Steuer- und Recheneinheit kann jedoch auch ein Warnsignal an das Maschinenpersonal ausgeben, das dieses veranlasst, den Sensor 15 oder zumindest den Sensorkopf 14 zu reinigen.Advantageously, the transport device will pivot the register mark sensors about a rotation axis out of the exposed areas of the inking unit. It has been shown that it is advantageous to tilt this axis of rotation relative to the base frame of the associated inking unit (angle deviating from 90 °).
The
If this is no longer the case, then the radiation output or the radiation input of the
Due to the changes in the measured values, a control and computing unit can recalibrate the sensor. A supplement or alternative to this procedure is an automatic cleaning, which can be carried out, for example, when a certain deviation of the measured values from the initial value is exceeded by the correspondingly set control and computing unit. However, the control and computing unit can also issue a warning signal to the machine personnel, which causes this to clean the
In Bezug auf den zusätzlichen Körper hat sich Folgendes erwiesen:
- Er wird auf die Oberfläche der Druckform oder des Druckformträgers aufgebracht Hierzu nimmt der Körper eine flächige Form an und wird beispielsweise wie ein Etikett auf diese Oberfläche aufgebracht Körper, die eine flächige Form aufweisen,
- haben zwei große Oberflächen, also eine Vorder- und eine Rückseite. Die Rückseite des weiteren Körpers sollte mit der Druckform verbindbar sein. Die Vorderseite sollte die zumindest eine Registermarke tragen.
- It is applied to the surface of the printing form or the printing plate support For this, the body takes on a flat shape and is applied, for example, like a label on this surface body, which have a flat shape,
- have two large surfaces, so a front and a back. The back of the other body should be connectable to the printing form. The front should carry the at least one register mark.
Der Körper ist ein Materialstreifen, dessen Längsachse vorzugsweise in Umfangsrichtung der Walze ausgerichtet wird. Auf dem Körper sind vorteilhafterweise eine gerade Anzahl von Markierungen beziehungsweise Marken aufgebracht. Eine symmetrische Gestaltung des Markenfeldes bezüglich eines Referenzpunktes ermöglicht eine Differenzmessung. Des Weiteren wird der Mittelwert zwischen Positionswerten zweier symmetrisch zu einem Referenzpunkt angeordneter Punkte ermitteln, um Messfehler, die von einer ungenauen Anordnung des Körpers zu der Druckform herrühren, in ihrer Wirkung zu minimieren.The body is a strip of material whose longitudinal axis is preferably aligned in the circumferential direction of the roller. On the body advantageously an even number of marks or marks are applied. A symmetrical design of the marker field with respect to a reference point allows differential measurement. Furthermore, the mean value between position values of two points arranged symmetrically to a reference point will be determined in order to minimize the effect of measurement errors resulting from an inaccurate arrangement of the body to the printing form.
Es ist von Vorteil, sowohl rechteckige Marken oder Markierungen als auch dreieckige, trapezförmige oder kegelstumpfförmige zu verwenden.
Weitere Ausführungsbeispiele der Erfindung gehen aus der gegenständlichen Beschreibung und den Ansprüchen hervor.
Die einzelnen Figuren zeigen:
- Fig. 1
- Draufsicht auf einen streifenförmigen zusätzlichen Körper
- Fig. 2
- Eine schematische Seitenansicht auf drei Farbwerke einer Zentralzylinderflexodruckmaschine
- Fig. 3
- Eine schematische Ansicht des Druckwerks 10
aus Figur 2 - Fig.4
- Eine schematische Ansicht des Druckwerks 10
aus Figur 2 mit weiteren Merkmalen - Fig. 5
Einen Formatzylinder 11, der mit einem Klischee und einem zusätzlichen Körper gerüstet ist- Fig. 6
Zusätzliche Körper 1, die aus Handling- und Lagergründen aufein Trägermaterial 28 aufgebracht wurden.
Further embodiments of the invention will become apparent from the description and the claims.
The individual figures show:
- Fig. 1
- Top view of a strip-shaped additional body
- Fig. 2
- A schematic side view of three inking units of a Zentralzylinderflexodruckmaschine
- Fig. 3
- A schematic view of the
printing unit 10 fromFIG. 2 - Figure 4
- A schematic view of the
printing unit 10 fromFIG. 2 with other features - Fig. 5
- A
format cylinder 11, with a cliché and a additional body is equipped - Fig. 6
-
Additional body 1, which were applied to acarrier material 28 for handling and storage reasons.
In
In
Die Sensorvorrichtung besteht insgesamt aus dem Sensorkopf 14, dem Lichtleiter 16 und dem Sensor 15. Eine solche Anordnung ist vorteilhaft, wenn es darum geht, den Sensorkopf 14 in einer chemisch kritischen Atmossphäre zu positionieren und den Sensor 15, mit seinen kritischen Bauteilen außerhalb dieses Bereiches zu platzieren. Der Sensorkopf kann dann das von den Registermarken 2, 2' beziehungsweise dem zusätzlichen Körper 1 oder anderer Teie des Formatzylinders 11 remittierte Licht auffangen und der Lichtleiter wird es dem Sensor 15 zuleiten.The sensor device as a whole consists of the
Oft ist es vorteilhaft, in dem Gehäuse des Sensors 15 auch eine Lichtquelle anzuordnen, die dem Sensorkopf 14 über den Lichtleiter 15 auch Licht zuleitet, das der Ausleuchtung der Umgebung der Registermarken dient.Often it is advantageous to arrange in the housing of the
Als Fixpunkte auf dem Klischee werden oft sogenannte Mikropunkte 32 verwendet. Oft sind Formatzylinder 11 auf ihrer Antriebsseite (hier in
In
Das bandförmige Material 28 kann mit den zusätzlichen Körpern zu Rollen aufgewickelt werden. Eine solche Rolle bringt viele Vorteile mit sich.The band-shaped
Es ist vorteilhaft, alle vorstehend beschriebenen und beanspruchten Verfahren oder Verfahrensschritte computerimplementiert durchzuführen. Demzufolge ist eine Steuereinheit vorzusehen, die so eingestellt ist, dass sie Maschinenkomponenten zur Ausführung der Verfahren ansteuert.
Claims (7)
- Strip-shaped body which can be applied to a printing plate cylinder of a flexographic printing machine,
wherein said strip-shaped body has a register mark field,
wherein said register mark field comprises a reference point and a plurality of register marks, and
wherein the positions of the register marks are optically recognizable by means of a sensor head and are symmetrically arranged and shaped with respect to the one reference point
so that the measurement errors which result from an inaccurate arrangement of the body with respect to the printing plate may be minimized by means of averaging and/or differentiation of two register marks arranged symmetrically with respect to the reference point. - Strip-shaped body according to claim 1, wherein the register marks have a triangular or trapezoidal shape.
- Strip-shaped body according to claim 1 - 2, wherein the register marks have a rectangular shape.
- Flexographic printing machine with at least two inking units,
with a printing plate cylinder within each inking unit provided with a strip-shaped body according to any one of the claims 1 to 3, and
with a sensing head within each inking unit to detect the positions of the register marks optically. - Flexographic printing machine according to claim 4, wherein the sensor head may be brought into a working position in which the positions of the register marks are recognizable on the outer circumference of the printing plate cylinder.
- Flexographic printing machine according to claim 5, wherein the sensor head is hinged to a transport device by means of which the sensor head may be transported from the working position into a rest position outside the inking unit.
- Flexographic printing machine according to claim 6, wherein the transport device is a pivoting device with which the sensor head may be pivoted about an axis of rotation during transport between the working position and the rest position.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009046566.9A DE102009046566B4 (en) | 2009-11-10 | 2009-11-10 | Body with a register marker field |
PCT/EP2010/067239 WO2011058074A1 (en) | 2009-11-10 | 2010-11-10 | Method for performing print jobs |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2498991A1 EP2498991A1 (en) | 2012-09-19 |
EP2498991B1 true EP2498991B1 (en) | 2017-04-19 |
Family
ID=43302071
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10776108.2A Active EP2498991B1 (en) | 2009-11-10 | 2010-11-10 | Measuring the register in printing machines |
Country Status (5)
Country | Link |
---|---|
US (1) | US20120210895A1 (en) |
EP (1) | EP2498991B1 (en) |
DE (1) | DE102009046566B4 (en) |
ES (1) | ES2630165T3 (en) |
WO (1) | WO2011058074A1 (en) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011086047A1 (en) * | 2011-11-09 | 2013-05-16 | Windmöller & Hölscher Kg | Method for adjusting the distances between cylinders of an inking unit and printing machine |
DE102011056143B4 (en) * | 2011-12-07 | 2021-08-19 | Windmöller & Hölscher Kg | Scanning device for markers on a roller of a printing machine, printing machine and printing process |
DE102012000181A1 (en) * | 2012-01-09 | 2013-07-11 | Perkenn GmbH | Register system for printing machines |
DE102012103853B4 (en) * | 2012-05-02 | 2022-10-13 | Windmöller & Hölscher Kg | Method for the parallel alignment of at least two cylinders to each other and calibration device |
FI126606B (en) * | 2012-05-15 | 2017-03-15 | Walki Group Oy | A method for accurately aligning printing with different inks on rotogravure printing |
US8896894B2 (en) * | 2012-09-19 | 2014-11-25 | Eastman Kodak Company | Method for forming structured microdots |
CN102896892B (en) * | 2012-10-25 | 2015-04-01 | 吕晶 | Device and method for tracing and checking shallow color code mark of drum type multicolor rotogravure press |
DE102014101433B4 (en) * | 2014-02-05 | 2016-03-24 | CONPRINTA GmbH & Co. KG | Printing unit for a flexographic printing machine and method for its operation |
WO2016014062A1 (en) * | 2014-07-24 | 2016-01-28 | Hewlett-Packard Development Company, L.P. | Front-to-back registration of printed content |
CN104527245B (en) * | 2014-12-22 | 2017-02-22 | 陕西北人印刷机械有限责任公司 | Gloss paint overprinting method of flexo printing machine |
FI3280594T3 (en) * | 2015-04-10 | 2024-04-17 | Omet Srl | Registering system for printing units of a rotary printing machine with a manually-adjustable print register |
EP3251849A1 (en) | 2016-05-31 | 2017-12-06 | Windmöller & Hölscher KG | Flexographic printing machine |
EP3251850A1 (en) | 2016-06-01 | 2017-12-06 | Windmöller & Hölscher KG | Flexographic printing machine with mounter |
CN110802960B (en) * | 2019-10-28 | 2021-05-14 | 西门子工厂自动化工程有限公司 | Unit type flexible printing machine overprinting method, device, system and computer readable medium |
CN114523756A (en) * | 2022-02-09 | 2022-05-24 | 福建琦峰科技有限公司 | Printing pattern length control method meeting color register stability |
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US3896377A (en) * | 1974-01-02 | 1975-07-22 | Harris Intertype Corp | Printing press instrumentation |
US4860650A (en) * | 1987-07-21 | 1989-08-29 | Houser Lee F | Method for attaining longitudinal registry of rolls in printing presses |
DE19832892A1 (en) * | 1998-07-22 | 2000-01-27 | Lemo Maschb Gmbh | Pre-positioning, registration and corrective-adjustment system for cylinders printing on plastic includes registration marks, detectors and computer correcting measured deviations |
DE19917774A1 (en) * | 1999-04-20 | 1999-11-04 | Wolfgang Pudimat | Device for multi-color printing on print material |
FR2803245B1 (en) * | 1999-12-31 | 2002-12-20 | Rollin Sa | COMPRESSIBLE PLATE FOR FLEXOGRAPHIC PRINTING AND PROCESS FOR OBTAINING |
EP1197331B1 (en) * | 2000-10-13 | 2008-05-21 | Dainippon Screen Mfg. Co., Ltd. | Printing press equipped with color chart measuring apparatus |
DE10320205B4 (en) * | 2003-05-07 | 2015-12-17 | Windmöller & Hölscher Kg | Multi-color rotary printing press |
ATE368907T1 (en) * | 2004-01-30 | 2007-08-15 | Hewlett Packard Development Co | AUTHENTICATION METHOD AND APPARATUS |
DE102004021597B4 (en) * | 2004-05-03 | 2017-04-13 | Heidelberger Druckmaschinen Ag | registration mark |
ITBO20040749A1 (en) | 2004-12-02 | 2005-03-02 | Bieffebi Spa | MACHINE FOR THE ASSEMBLY OF A FLEXOGRAPHIC CLICHE REGISTER WITH A VIRTUAL INFORMATION SYSTEM |
CN102381013B (en) * | 2006-10-23 | 2015-11-25 | 博布斯特比勒费尔德有限公司 | The method of adjustment of the roller in rotary press |
ATE459470T1 (en) | 2006-10-23 | 2010-03-15 | Fischer & Krecke Gmbh | METHOD, MOUNTING DEVICE AND CONTROL UNIT FOR ADJUSTING A ROLLER IN A PRINTING MACHINE |
-
2009
- 2009-11-10 DE DE102009046566.9A patent/DE102009046566B4/en active Active
-
2010
- 2010-11-10 US US13/505,328 patent/US20120210895A1/en not_active Abandoned
- 2010-11-10 ES ES10776108.2T patent/ES2630165T3/en active Active
- 2010-11-10 EP EP10776108.2A patent/EP2498991B1/en active Active
- 2010-11-10 WO PCT/EP2010/067239 patent/WO2011058074A1/en active Application Filing
Non-Patent Citations (1)
Title |
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None * |
Also Published As
Publication number | Publication date |
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US20120210895A1 (en) | 2012-08-23 |
ES2630165T3 (en) | 2017-08-18 |
DE102009046566A1 (en) | 2011-05-12 |
EP2498991A1 (en) | 2012-09-19 |
DE102009046566B4 (en) | 2017-06-01 |
WO2011058074A1 (en) | 2011-05-19 |
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