EP2293946B1 - Procédé et dispositif d'impression de papier imprimé - Google Patents

Procédé et dispositif d'impression de papier imprimé Download PDF

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Publication number
EP2293946B1
EP2293946B1 EP09772058A EP09772058A EP2293946B1 EP 2293946 B1 EP2293946 B1 EP 2293946B1 EP 09772058 A EP09772058 A EP 09772058A EP 09772058 A EP09772058 A EP 09772058A EP 2293946 B1 EP2293946 B1 EP 2293946B1
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EP
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Prior art keywords
printing
décor
paper
printed
cut
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EP09772058A
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German (de)
French (fr)
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EP2293946A1 (en
Inventor
Udo Tünte
Richard Schwitte
Frank Petersen
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Huelsta Werke Huels GmbH and Co KG
Flooring Industries Ltd SARL
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Huelsta Werke Huels GmbH and Co KG
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Application filed by Huelsta Werke Huels GmbH and Co KG filed Critical Huelsta Werke Huels GmbH and Co KG
Priority to PL09772058T priority Critical patent/PL2293946T3/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/001—Handling wide copy materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/66—Applications of cutting devices
    • B41J11/70—Applications of cutting devices cutting perpendicular to the direction of paper feed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
    • B41J29/38—Drives, motors, controls or automatic cut-off devices for the entire printing mechanism
    • B41J29/393—Devices for controlling or analysing the entire machine ; Controlling or analysing mechanical parameters involving printing of test patterns

Definitions

  • the invention relates to a method for printing on printing paper according to the preamble of claim 1. Furthermore, the present invention relates to a digital printing apparatus according to the preamble of claim 10.
  • the printing of printing paper in rotary printing is particularly useful when printing paper with a certain decor is required in large quantities. For a decorative change, it is necessary to change the impression cylinder, which is relatively expensive. The problem is that it is comparatively common that certain decors are needed only in very small quantities. The printing in rotary printing is then, relative to the small amount of printing paper to be printed, not only because of the necessary conversion comparatively expensive, but also relatively expensive, since the cost of corresponding printing cylinder with other decors are relatively high.
  • From the GB 2 312 648 A is a digital printing device for printing on printing paper with at least one decorative image having decor known.
  • an optical monitoring device for monitoring the print quality of the decor is provided.
  • Object of the present invention is therefore to provide a method and an apparatus of the type mentioned, with even small amounts of printing paper can be printed inexpensively and quickly.
  • the basic idea of the invention is to use a digital printing method instead of the rotary printing method.
  • a digital printing device can be very simple and inexpensive computer-aided create a variety of decors.
  • the print quality of a digital printing process is comparable to that of rotary printing.
  • the invention is not limited to the application of the digital printing method known as such. From practice it is known to apply the digital printing method for printing on printing paper for use with sheet-like components, such as panels, on individual sheets. It is also known to print the components as such.
  • a cut mark is variably arranged
  • the variable arrangement of the cut mark depends on the print quality of the decoration and possibly the function of the digital printing device.
  • the state or the function of the digital printing device which may be, for example, an ink-jet printer, possibly checked in the invention, for example, based on certain operating temperatures, but always the print quality of the decor is monitored accordingly automatically. If, for example, the print quality is poor when the digital printing device resumes or the printing process continues, no cut mark is initially set. Only when the print quality of the decor meets the necessary requirements, a corresponding cut mark is set. Printing a cut mark entails simultaneously or subsequently starting printing a new decor image.
  • the pressure of a cut mark can be initiated manually and / or automatically.
  • the print quality can be manually monitored after resuming the printing process. If the print quality of the decor is considered adequate, initiate an appropriate command to start printing the cut mark. At the same time, a new decorative image is then printed on the next paper section. It is preferable, of course, that the pressure of the cut mark be automatically initiated. In this case, it is expedient if the print quality of the decor is automatically monitored. As a result, the digital printing device can ultimately be operated completely automatically.
  • the print quality of the decoration can be monitored by means of an optical monitoring device which is associated with the digital printing device. It should preferably be provided that the optical monitoring device the comparing the current print result with a predetermined print quality after an interruption and then continuing the printing process and automatically initiating the print of a cut mark if the current print result matches the given print quality. At the same time a new paper section is defined and started with the printing of the decorative image on this paper section.
  • the monitoring device directly monitors the print quality of the decor and thus the decor image with regard to its print quality.
  • a corresponding sensor is arranged above the decor and then compares the print quality of the decorative image with the specified print quality.
  • the print quality of the decoration or the decor image is not derived directly from the printed decor image, but from a marginal strip marker, which is continuously printed edgewise and parallel to the decor.
  • This edge strip marking has at least one longitudinal color strip. From the print quality of the marginal strip, the print quality of the decor is then derived as a whole.
  • the color of the color strip corresponds to the color of the print head.
  • the color of the edge strip of the edge strip marking is then monitored.
  • Such color comparison is usually easier to do than a color comparison within an entire decor image.
  • the number of color stripes of the edge strip marking corresponds to the number of active print heads of the printing device. In this way, it can then be determined whether all active printheads work and deliver ink of the desired quality. Becomes a quality limitation in the marginal strip monitoring found, this means that the decor image has quality limitations.
  • the present invention relates to a digital printing device with an optical monitoring device for monitoring the print quality of the printed decorative image, in which a monitoring device coupled to the control means is provided, which after an interruption of the printing operation and subsequent continuation at a predetermined match of the current printing result with the predetermined Print quality automatically initiates the print of a cut mark.
  • a printing paper 1 is shown in the form of an elongated web of a roll.
  • the printing paper 1 may be conventional resinated, partially resinated or doctored paper which may or may not have an ink receiving layer on the printing side.
  • Printed on the printing paper is a printed decor 2.
  • the decor 2 can be any image.
  • the decor 2 has at least one decorative image 3.
  • a plurality of decorative images 3 are provided, which are arranged one behind the other in the longitudinal direction L.
  • a plurality of markings are respectively provided on the edge, namely in the edge region 4, 5 of both longitudinal edges of the printing paper 1.
  • the markings are so-called cut marks 6, 7, 8 as well as alignment marks 9.
  • the cut marks 6, 7, 8 and alignment markings 9 face one another in each case.
  • the opposite cut marks 6 and the opposite cut marks 7 define a paper section 10 on which a decorative image 13 is located.
  • the cut marks 6, 7 serve in the present case as a display for dividing the printing paper web into individual sheets.
  • the alignment marks are used in this context for the corresponding orientation of the printing paper web.
  • the respective paper section are then cut further.
  • the decorative image 13 has five identical decor sections 14, which are pressed in the further processing with plate-shaped bodies to flat components, such as panels or panels for floor, wall, ceiling or furniture applications.
  • the number of the decorative portions is not limited to five, as shown. It can also be a larger or smaller number of decor sections per decorative image 13 may be provided.
  • the individual cut marks 6, 7, 8 are arranged at different distances from each other.
  • the usual distance between two cut marks and thus the usual amount of the paper section defined by the cut marks is determined by the spacing of adjacent cut marks 6, 7 at an edge area.
  • the distance of the cut marks 7 and 8 is considerably smaller than the distance of the cut markers 6, 7.
  • the distance of the cut mark 8 to not shown but in the longitudinal direction following cut mark ultimately corresponds again to the distance of the cut marks 6, 7.
  • the method for printing on the printing paper 1 is carried out in such a manner that the printing paper 1 is fed from a teaching paper roll to a digital printing device.
  • a digital printing device This can be an ink-jet printer, over which the decor 2 is printed.
  • the printing paper 1 is passed from the blank paper roll through a corresponding paper feed of the digital printing apparatus to a paper discharge on which the printing paper 1 is wound into a printed printing paper roll.
  • the cut mark 6 is first printed on both sides.
  • the decorative image 13 is printed via the print heads, which are located on the printer carriage which can be moved on a printer guide.
  • the cut marks 7 are printed at the end of the decorative image 13.
  • the cut marks 7 on the one hand form the end of the paper section 10 and the beginning of the paper section 11 with a corresponding decorative image 13.
  • the individual decorative images 13 on the paper sections 10, 11, 12 are identical. However, this does not have to be the case. In principle, different decorative images 13 on the individual paper sections 10, 11, 12 may be provided.
  • the printing process is now interrupted. This may be necessary, for example, for maintenance reasons or to replace an ink tank. Subsequently, printing will continue.
  • the print quality of the decor 2 or the respective decorative image 13 is monitored. This is an automatic monitoring by means of a monitoring device, not shown in detail. If it is determined in the optical monitoring after the resumption of printing activity that the print quality of the decorative image 13 corresponds to the predetermined requirements, the cut marks 8 are printed.
  • the cut marks 8 delimit the paper section 11 and represent the beginning of the paper section 12 with a new decorative image 13.
  • the optical monitoring device has at least one optical sensor 15, 16.
  • the optical sensor 15 is directed directly to the decorative image 13, while the optical sensor 16 is directed to a marginal strip 17, which extends parallel to the decor 2 edge and parallel to the decorative images 13 is printed.
  • the edge strip marking 17 in the present case has a plurality of edge strips 18.
  • the individual marginal strips 18 are colored and correspond in color and number to the color and number of active printheads of the printing device.
  • the two sensors 15, 16, which are arranged immediately following the printer carriage or the print heads, may alternatively or also be provided jointly.
  • the two sensors 15, 16 are ultimately coupled to a control device 19 of the printing device 1, which in turn has a comparator, not shown, in which the actual pressure result is compared with the predetermined desired pressure result in an actual target comparison ,

Landscapes

  • Accessory Devices And Overall Control Thereof (AREA)
  • Ink Jet (AREA)
  • Paper (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Record Information Processing For Printing (AREA)

Abstract

The invention relates to a method for imprinting printing paper (1) from a roll having a pattern (2) comprising at least one pattern image (3) for use with flat components, particularly floor, wall, ceiling, or furniture applications, wherein cut markings (6, 7, 8) at the edges are also printed on the printing paper (1) in addition to the pattern (2), said markings defining adjacent paper segments (10, 11, 12) on each of which pattern images (3) are located. In order to provide a simple and cost-effective printing method, whereby prints of high print quality can be produced, according to the invention, the printing paper (1) is imprinted by means of a digital printing method by a digital printing device, and a cut marking (6, 7, 8) is printed after interrupting the printing process and subsequent restarting of the same, depending on the print quality of the pattern (2) and/or the function of the digital printing device.

Description

Die Erfindung betrifft ein Verfahren zum Bedrucken von Druckpapier nach dem Oberbegriff des Anspruchs 1. Des Weiteren betrifft die vorliegende Erfindung eine digitale Druckvorrichtung nach dem Oberbegriff des Anspruchs 10.The invention relates to a method for printing on printing paper according to the preamble of claim 1. Furthermore, the present invention relates to a digital printing apparatus according to the preamble of claim 10.

Es ist aus der Praxis bekannt, dass Druckpapier von der Rolle im Rotations- bzw. Tiefdruck bedruckt wird. Die dabei verwendeten Druckzylinder weisen das aufzudruckende Dekor als Negativbild auf. Randseitig sind auf den Druckzylindern sowohl Cut- als auch Ausrichtmarkierungen vorgesehen. Die Cut-Markierungen dienen dazu, diejenigen Stellen anzuzeigen, an denen das Druckpapier anschließend zu einzelnen Bögen geschnitten wird. Üblicherweise werden Cut-Markierungen auch als "Schneid(e)marken" oder "Schnittmarken" bezeichnet. Die Ausrichtmarkierungen dienen letztlich zur Ausrichtung bei der Weiterverarbeitung der Bögen.It is known from practice that printing paper is printed by the roll in rotary or gravure printing. The printing cylinders used have the decor to be printed on as a negative image. On the edge side both cut and alignment marks are provided on the printing cylinders. The cut marks serve to indicate those locations where the printing paper is subsequently cut into individual sheets. Usually, cut marks are also referred to as "cut marks" or "cut marks". The alignment marks ultimately serve for alignment during the further processing of the sheets.

Die Bedruckung von Druckpapier im Rotationsdruck bietet sich insbesondere an, wenn Druckpapier mit einem bestimmten Dekor in großen Mengen benötigt wird. Für einen Dekorwechsel ist es erforderlich, die Druckzylinder zu wechseln, was vergleichsweise aufwendig ist. Problematisch ist, daß es vergleichsweise häufig vorkommt, daß bestimmte Dekore nur in ganz geringen Mengen benötigt werden. Das Bedrucken im Rotationsdruck ist dann, bezogen auf die geringe zu bedruckende Menge an Druckpapier, nicht nur wegen der notwendigen Umrüstung vergleichsweise aufwendig, sondern auch relativ teuer, da die Kosten für entsprechende Druckzylinder mit anderen Dekoren vergleichsweise hoch sind.The printing of printing paper in rotary printing is particularly useful when printing paper with a certain decor is required in large quantities. For a decorative change, it is necessary to change the impression cylinder, which is relatively expensive. The problem is that it is comparatively common that certain decors are needed only in very small quantities. The printing in rotary printing is then, relative to the small amount of printing paper to be printed, not only because of the necessary conversion comparatively expensive, but also relatively expensive, since the cost of corresponding printing cylinder with other decors are relatively high.

Aus der DE 109 42 528 A und der DE 87 03 518 U gehen bereits Verfahren zum Bedrucken von Druckpapier von einer Rolle hervor. Bei den bekannten Verfahren wird Druckpapier zur Herstellung von Bildern gedruckt. Aus dem Druckpapier werden zusätzlich zu den Bildern Markierungen aufgedruckt, die benachbarte Papierabschnitte definieren, auf denen sich jeweils die einzelnen Bilder befinden. Der Druck erfolgt dabei mittels eines digitalen Druckverfahrens durch eine digitale Druckvorrichtung.From the DE 109 42 528 A and the DE 87 03 518 U There are already processes for printing on printing paper from a roll. In the known methods printing paper is printed for the production of images. From the printing paper, marks are printed in addition to the images, which define adjacent paper sections, on each of which the individual images are located. The printing takes place by means of a digital printing process by a digital printing device.

Aus der GB 2 312 648 A ist eine digitale Druckvorrichtung zum Bedrucken von Druckpapier mit einem wenigstens ein Dekorbild aufweisenden Dekor bekannt. Dabei ist eine optische Überwachungseinrichtung zur Überwachung der Druckqualität des Dekors vorgesehen.From the GB 2 312 648 A is a digital printing device for printing on printing paper with at least one decorative image having decor known. In this case, an optical monitoring device for monitoring the print quality of the decor is provided.

Problematisch beim Stand der Technik ist, dass sich nach einer Unterbrechung des Druckvorgangs und einer anschließenden Fortsetzung stets eine vergleichsweise große Menge an Ausschuss ergibt, bis der Druck wieder normal verläuft.The problem with the prior art is that after an interruption of the printing process and a subsequent continuation always results in a relatively large amount of waste until the pressure is back to normal.

Aufgabe der vorliegenden Erfindung ist es nun, ein Verfahren und eine Vorrichtung der eingangs genannten Art zur Verfügung zu stellen, wobei sich auch geringe Mengen an Druckpapier kostengünstig und schnell bedrucken lassen.Object of the present invention is therefore to provide a method and an apparatus of the type mentioned, with even small amounts of printing paper can be printed inexpensively and quickly.

Die vorgenannte Aufgabe ist verfahrensgemäß durch die Merkmale des Anspruchs 1 gelöst. Bei der Erfindung ist vorgesehen, dass nach einer Unterbrechung des Druckvorgangs und anschließender Fortsetzung wenigstens eine Cut-Markierung in Abhängigkeit der Druckqualität des Dekors und möglicherweise der Funktion der digitalen Druckvorrichtung gedruckt wird. Dabei ist es zweckmäßigerweise so, daß gleichzeitig oder anschließend mit dem Druck der Cut-Markierung damit begonnen wird, ein neues Dekorbild zu drucken.The above object is achieved by the method according to the features of claim 1. In the invention it is provided that after an interruption of the printing operation and subsequent continuation, at least one cut mark is printed depending on the print quality of the decoration and possibly the function of the digital printing device. It is expediently so that simultaneously or subsequently with the pressure of the cut mark is begun to print a new decor image.

Der Erfindung liegt zunächst einmal der Grundgedanke zugrunde, statt des Rotationsdruckverfahrens auf ein Digitaldruckverfahren zurückzugreifen. Mittels einer digitalen Druckvorrichtung lassen sich sehr einfach und kostengünstig computergestützt unterschiedlichste Dekore kreieren. Dabei ist die Druckqualität eines digitalen Druckverfahrens mit der des Rotationsdruckes vergleichbar. Die Erfindung ist jedoch nicht auf die Anwendung des digitalen Druckverfahrens, das als solches bekannt ist, beschränkt. Aus der Praxis ist es bekannt, das digitale Druckverfahren zum Bedrucken von Druckpapier zur Verwendung bei flächigen Bauteilen, wie beispielsweise Paneelen, auf einzelnen Bögen anzuwenden. Es ist auch bekannt, die Bauteile als solche zu bedrucken.The basic idea of the invention is to use a digital printing method instead of the rotary printing method. By means of a digital printing device can be very simple and inexpensive computer-aided create a variety of decors. The print quality of a digital printing process is comparable to that of rotary printing. However, the invention is not limited to the application of the digital printing method known as such. From practice it is known to apply the digital printing method for printing on printing paper for use with sheet-like components, such as panels, on individual sheets. It is also known to print the components as such.

Bei der Erfindung ist es nun so, daß, anders als beim Rotationsdruck, wo die Cut- und/oder Ausrichtmarkierungen immer an der gleichen Stelle vorgesehen sind, sich aufgrund des feststehenden Zylinderdurchmessers also in regelmäßigen Abständen wiederholen, hier eine Cut-Markierung variabel angeordnet wird. Die variable Anordnung der Cut-Markierung erfolgt in Abhängigkeit der Druckqualität des Dekors und möglicherweise der Funktion der digitalen Druckvorrichtung. Letztlich wird bei der Erfindung also möglicherweise der Zustand bzw. die Funktion der digitalen Druckvorrichtung, bei der es sich beispielsweise um einen Ink-Jet-Drucker handeln kann, überprüft, beispielsweise anhand bestimmter Betriebstemperaturen, aber immer wird die Druckqualität des Dekors entsprechend automatisch überwacht. Ist beispielsweise die Druckqualität bei einem Wiederanlaufen der digitalen Druckvorrichtung bzw. Fortsetzen des Druckvorgangs schlecht, wird zunächst keine Cut-Markierung gesetzt. Erst wenn die Druckqualität des Dekors den notwendigen Anforderungen entspricht, wird eine entsprechende Cut-Markierung gesetzt. Mit dem Drucken einer Cut-Markierung ist verbunden, daß gleichzeitig oder anschließend begonnen wird, ein neues Dekorbild zu drucken.In the invention, it is now so that, unlike the rotary printing, where the cut and / or alignment marks are always provided at the same location, so repeat due to the fixed cylinder diameter so at regular intervals, here a cut mark is variably arranged , The variable arrangement of the cut mark depends on the print quality of the decoration and possibly the function of the digital printing device. Ultimately, the state or the function of the digital printing device, which may be, for example, an ink-jet printer, possibly checked in the invention, for example, based on certain operating temperatures, but always the print quality of the decor is monitored accordingly automatically. If, for example, the print quality is poor when the digital printing device resumes or the printing process continues, no cut mark is initially set. Only when the print quality of the decor meets the necessary requirements, a corresponding cut mark is set. Printing a cut mark entails simultaneously or subsequently starting printing a new decor image.

Grundsätzlich ist es möglich, daß der Druck einer Cut-Markierung manuell und/oder automatisch initiierbar ist. So kann beispielsweise die Druckqualität nach einem Fortsetzen des Druckvorgangs manuell überwacht werden. Wird die Druckqualität des Dekors für hinreichend erachtet, wird durch Initiierung eines entsprechenden Befehls mit dem Druck der Cut-Markierung begonnen. Gleichzeitig wird dann auf dem nächsten Papierabschnitt ein neues Dekorbild gedruckt. Bevorzugt ist es natürlich, daß der Druck der Cut-Markierung automatisch initiiert wird. In diesem Falle ist es zweckmäßig, wenn die Druckqualität des Dekors automatisch überwacht wird. Hierdurch kann die Digitaldruckvorrichtung letztlich komplett automatisch betrieben werden.In principle, it is possible that the pressure of a cut mark can be initiated manually and / or automatically. For example, the print quality can be manually monitored after resuming the printing process. If the print quality of the decor is considered adequate, initiate an appropriate command to start printing the cut mark. At the same time, a new decorative image is then printed on the next paper section. It is preferable, of course, that the pressure of the cut mark be automatically initiated. In this case, it is expedient if the print quality of the decor is automatically monitored. As a result, the digital printing device can ultimately be operated completely automatically.

Von besonderem Vorteil ist es in diesem Zusammenhang, wenn die Druckqualität des Dekors mittels einer optischen Überwachungseinrichtung überwachbar ist, die der Digitaldruckvorrichtung zugeordnet ist. Dabei sollte vorzugsweise vorgesehen sein, daß die optische Überwachungseinrichtung das aktuelle Druckergebnis nach einer Unterbrechung und anschließender Fortsetzung des Druckvorgangs mit einer vorgegebenen Druckqualität vergleicht und bei einer vorgegebenen Übereinstimmung des aktuellen Druckergebnisses mit der vorgegebenen Druckqualität den Druck einer Cut-Markierung automatisch initiiert. Gleichzeitig wird damit ein neuer Papierabschnitt definiert und mit dem Druck des Dekorbildes auf diesem Papierabschnitt begonnen.It is particularly advantageous in this context if the print quality of the decoration can be monitored by means of an optical monitoring device which is associated with the digital printing device. It should preferably be provided that the optical monitoring device the comparing the current print result with a predetermined print quality after an interruption and then continuing the printing process and automatically initiating the print of a cut mark if the current print result matches the given print quality. At the same time a new paper section is defined and started with the printing of the decorative image on this paper section.

Grundsätzlich ist es möglich, daß die Überwachungseinrichtung unmittelbar die Druckqualität des Dekors und damit das Dekorbild im Hinblick auf seine Druckqualität überwacht. In diesem Falle ist ein entsprechender Sensor oberhalb des Dekors angeordnet und vergleicht dann die Druckqualität des Dekorbildes mit der vorgegebenen Druckqualität. Es findet also ein Ist-Soll-Vergleich des Dekorbildes als solches bzw. dessen Farben statt.In principle, it is possible that the monitoring device directly monitors the print quality of the decor and thus the decor image with regard to its print quality. In this case, a corresponding sensor is arranged above the decor and then compares the print quality of the decorative image with the specified print quality. Thus, there is an actual target comparison of the decorative image as such or its colors.

Bei einer besonders bevorzugten Ausführungsform der vorliegenden Erfindung wird die Druckqualität des Dekors bzw. des Dekorbildes nicht unmittelbar aus dem gedruckten Dekorbild abgeleitet, sondern aus einer Randstreifenmarkierung, die randseitig fortlaufend und parallel zum Dekor gedruckt wird. Diese Randstreifenmarkierung weist wenigstens einen längslaufenden Farbstreifen auf. Aus der Druckqualität des Randstreifens wird dann die Druckqualität des Dekors insgesamt abgeleitet.In a particularly preferred embodiment of the present invention, the print quality of the decoration or the decor image is not derived directly from the printed decor image, but from a marginal strip marker, which is continuously printed edgewise and parallel to the decor. This edge strip marking has at least one longitudinal color strip. From the print quality of the marginal strip, the print quality of the decor is then derived as a whole.

Besonders bevorzugt ist es in diesem Zusammenhang, daß die Farbe des Farbstreifens der Farbe des Druckkopfes entspricht. Hierbei wird dann die Farbe des Randstreifens der Randstreifenmarkierung überwacht. Ein solcher Farbvergleich ist in der Regel einfacher vorzunehmen als ein Farbvergleich innerhalb eines gesamten Dekorbildes. Auch hier erfolgt letztlich ein Ist-Soll-Vergleich der Farbe des Randstreifens mit der vorgegebenen Farbe des betreffenden Druckkopfes.It is particularly preferred in this context that the color of the color strip corresponds to the color of the print head. In this case, the color of the edge strip of the edge strip marking is then monitored. Such color comparison is usually easier to do than a color comparison within an entire decor image. Again, there is ultimately an actual-target comparison of the color of the edge strip with the predetermined color of the printhead in question.

Besonders günstig ist es in diesem Zusammenhang, daß die Anzahl der Farbstreifen der Randstreifenmarkierung der Anzahl der aktiven Druckköpfe der Druckvorrichtung entspricht. Auf diese Weise kann dann festgestellt werden, ob alle aktiven Druckköpfe funktionieren und Druckfarbe in der gewünschten Qualität abgeben. Wird bei der Randstreifenüberwachung eine Qualitätseinschränkung festgestellt, bedeutet dies, daß auch das Dekorbild Qualitätseinschränkungen hat.It is particularly favorable in this context that the number of color stripes of the edge strip marking corresponds to the number of active print heads of the printing device. In this way, it can then be determined whether all active printheads work and deliver ink of the desired quality. Becomes a quality limitation in the marginal strip monitoring found, this means that the decor image has quality limitations.

Schließlich betrifft die vorliegende Erfindung eine digitale Druckvorrichtung mit einer optischen Überwachungseinrichtung zur Überwachung der Druckqualität des gedruckten Dekorbildes, bei der eine mit der Überwachungseinrichtung gekoppelte Steuereinrichtung vorgesehen ist, die nach einer Unterbrechung des Druckvorgangs und anschließender Fortsetzung bei einer vorgegebenen Übereinstimmung des aktuellen Druckergebnisses mit der vorgegebenen Druckqualität den Druck einer Cut-Markierung automatisch initiiert.Finally, the present invention relates to a digital printing device with an optical monitoring device for monitoring the print quality of the printed decorative image, in which a monitoring device coupled to the control means is provided, which after an interruption of the printing operation and subsequent continuation at a predetermined match of the current printing result with the predetermined Print quality automatically initiates the print of a cut mark.

Nachfolgend wird ein Ausführungsbeispiel der vorliegenden Erfindung anhand der Zeichnung erläutert. In der Zeichnung ist ein Druckpapier 1 in Form einer langgestreckten Bahn von einer Rolle dargestellt. Bei dem Druckpapier 1 kann es sich um übliches beharztes, teilbeharztes oder durchbeharztes Papier handeln, das druckseitig eine Tintenaufnahmeschicht aufweisen kann oder auch nicht. Druckseitig auf dem Druckpapier befindet sich ein aufgedrucktes Dekor 2. Bei dem Dekor 2 kann es sich um jedes beliebige Bild handeln. Das Dekor 2 weist wenigstens ein Dekorbild 3 auf. Vorliegend sind eine Vielzahl von Dekorbildern 3 vorgesehen, die in Längsrichtung L hintereinander angeordnet sind.Hereinafter, an embodiment of the present invention will be explained with reference to the drawings. In the drawing, a printing paper 1 is shown in the form of an elongated web of a roll. The printing paper 1 may be conventional resinated, partially resinated or doctored paper which may or may not have an ink receiving layer on the printing side. Printed on the printing paper is a printed decor 2. The decor 2 can be any image. The decor 2 has at least one decorative image 3. In the present case, a plurality of decorative images 3 are provided, which are arranged one behind the other in the longitudinal direction L.

Zusätzlich zu dem Dekor 2 sind randseitig, und zwar im Randbereich 4, 5 beider Längsränder des Druckpapiers 1, jeweils eine Mehrzahl von Markierungen vorgesehen. Bei den Markierungen handelt es sich einerseits um sogenannte Cut-Markierungen 6, 7, 8 sowie um Ausrichtmarkierungen 9. Die Cut-Markierungen 6, 7, 8 und Ausrichtmarkierungen 9 liegen einander jeweils gegenüber. Die einander gegenüberliegenden Cut-Markierungen 6 und die einander gegenüberliegenden Cut-Markierungen 7 definieren einen Papierabschnitt 10, auf dem sich ein Dekorbild 13 befindet.In addition to the decor 2, a plurality of markings are respectively provided on the edge, namely in the edge region 4, 5 of both longitudinal edges of the printing paper 1. On the one hand, the markings are so-called cut marks 6, 7, 8 as well as alignment marks 9. The cut marks 6, 7, 8 and alignment markings 9 face one another in each case. The opposite cut marks 6 and the opposite cut marks 7 define a paper section 10 on which a decorative image 13 is located.

Die Cut-Markierungen 6, 7 dienen vorliegend als Anzeige zum Zerteilen der Druckpapierbahn in einzelne Bögen. Die Ausrichtmarkierungen dienen in diesem Zusammenhang zur entsprechenden Ausrichtung der Druckpapierbahn. Beim Zerteilen/Zerschneiden der Druckpapierbahn in einzelne Bögen kann auch der jeweilige Papierabschnitt dann weiter zugeschnitten werden. Bei der dargestellten Ausführungsform ist es so, daß das Dekorbild 13 fünf gleiche Dekorabschnitte 14 aufweist, die bei der weiteren Verarbeitung mit plattenförmigen Grundkörpern zu flächigen Bauteilen, wie Paneelen oder Platten zur Boden-, Wand-, Decken- oder Möbelanwendungen verpreßt werden. Im übrigen versteht es sich, daß die Anzahl der Dekorabschnitte nicht auf fünf, wie dies dargestellt ist, beschränkt ist. Es kann auch eine größere oder eine kleinere Anzahl von Dekorabschnitten pro Dekorbild 13 vorgesehen sein.The cut marks 6, 7 serve in the present case as a display for dividing the printing paper web into individual sheets. The alignment marks are used in this context for the corresponding orientation of the printing paper web. When dividing / cutting the printing paper web into individual sheets can Also, the respective paper section are then cut further. In the illustrated embodiment, it is such that the decorative image 13 has five identical decor sections 14, which are pressed in the further processing with plate-shaped bodies to flat components, such as panels or panels for floor, wall, ceiling or furniture applications. Incidentally, it is understood that the number of the decorative portions is not limited to five, as shown. It can also be a larger or smaller number of decor sections per decorative image 13 may be provided.

Bei der dargestellten Ausführungsform ist es nun so, daß die einzelnen Cut-Markierungen 6, 7, 8 in unterschiedlichen Abständen zueinander angeordnet sind. Der übliche Abstand zweier Cut-Markierungen und damit das übliche Maß des durch die Cut-Markierungen definierten Papierabschnitts wird durch den Abstand benachbarter Cut-Markierungen 6, 7 an einem Randbereich bestimmt. Der Abstand der Cut-Markierungen 7 und 8 ist erheblich geringer als der Abstand der Cut-Markierungen 6, 7. Der Abstand der Cut-Markierung 8 zur nicht mehr dargestellten aber in Längsrichtung folgenden Cut-Markierung entspricht letztlich wieder dem Abstand der Cut-Markierungen 6, 7.In the illustrated embodiment, it is now so that the individual cut marks 6, 7, 8 are arranged at different distances from each other. The usual distance between two cut marks and thus the usual amount of the paper section defined by the cut marks is determined by the spacing of adjacent cut marks 6, 7 at an edge area. The distance of the cut marks 7 and 8 is considerably smaller than the distance of the cut markers 6, 7. The distance of the cut mark 8 to not shown but in the longitudinal direction following cut mark ultimately corresponds again to the distance of the cut marks 6, 7.

Das Verfahren zum Bedrucken des Druckpapiers 1 erfolgt nun derart, daß das Druckpapier 1 von einer Lehrpapierrolle einer digitalen Druckvorrichtung zugeführt wird. Hierbei kann es sich um einen Ink-Jet-Drucker handeln, über den das Dekor 2 aufgedruckt wird. Vor Beginn des Druckvorganges wird das Druckpapier 1 von der Leerpapierrolle durch eine entsprechende Papierzuführung der digitalen Druckvorrichtung hindurchgeführt zu einer Papierabführung, auf der das Druckpapier 1 zu einer bedruckten Druckpapierrolle aufgewickelt wird. Anschließend kann mit dem Druckvorgang begonnen werden. So wird beispielsweise zum Drucken des Dekorbildes 13 zunächst beidseitig die Cut-Markierung 6 gedruckt. Gleichzeitig dazu wird über die Druckköpfe, die sich an dem an einer Druckerführung verfahrbaren Druckerschlitten befinden, das Dekorbild 13 gedruckt. Nachdem zwischenzeitlich die Ausrichtmarkierungen 9 gedruckt worden sind, werden zum Ende des Dekorbildes 13 die Cut-Markierungen 7 gedruckt. Die Cut-Markierungen 7 bilden dabei einerseits das Ende des Papierabschnittes 10 und den Beginn des Papierabschnittes 11 mit einem entsprechenden Dekorbild 13.The method for printing on the printing paper 1 is carried out in such a manner that the printing paper 1 is fed from a teaching paper roll to a digital printing device. This can be an ink-jet printer, over which the decor 2 is printed. Before the start of printing, the printing paper 1 is passed from the blank paper roll through a corresponding paper feed of the digital printing apparatus to a paper discharge on which the printing paper 1 is wound into a printed printing paper roll. Then you can start printing. For example, to print the decorative image 13, the cut mark 6 is first printed on both sides. At the same time, the decorative image 13 is printed via the print heads, which are located on the printer carriage which can be moved on a printer guide. After the registration marks 9 have been printed in the meantime, the cut marks 7 are printed at the end of the decorative image 13. The cut marks 7 on the one hand form the end of the paper section 10 and the beginning of the paper section 11 with a corresponding decorative image 13.

Vorliegend sind die einzelnen Dekorbilder 13 auf den Papierabschnitten 10, 11, 12 identisch. Dies muß jedoch nicht so sein. Grundsätzlich können auch unterschiedliche Dekorbilder 13 auf den einzelnen Papierabschnitten 10, 11, 12 vorgesehen sein.In the present case, the individual decorative images 13 on the paper sections 10, 11, 12 are identical. However, this does not have to be the case. In principle, different decorative images 13 on the individual paper sections 10, 11, 12 may be provided.

Während des Druckes des Dekorbildes 13 auf dem Papierabschnitt 11 wird nun der Druckvorgang unterbrochen. Dies kann beispielsweise aus Wartungsgründen oder zum Austausch eines Tintentanks erforderlich sein. Anschließend wird der Druckvorgang fortgesetzt. Während des gesamten Druckvorgangs wird die Druckqualität des Dekors 2 bzw. des jeweiligen Dekorbildes 13 überwacht. Hierbei handelt es sich um eine automatische Überwachung mittels einer im einzelnen nicht dargestellten Überwachungseinrichtung. Wird bei der optischen Überwachung nach der Wiederaufnahme der Drucktätigkeit festgestellt, daß die Druckqualität des Dekorbildes 13 den vorgegebenen Anforderungen entspricht, werden die Cut-Markierungen 8 gedruckt. Die Cut-Markierungen 8 begrenzen den Papierabschnitt 11 und stellen den Beginn des Papierabschnitts 12 mit einem neuen Dekorbild 13 dar.During the printing of the decorative image 13 on the paper section 11, the printing process is now interrupted. This may be necessary, for example, for maintenance reasons or to replace an ink tank. Subsequently, printing will continue. During the entire printing process, the print quality of the decor 2 or the respective decorative image 13 is monitored. This is an automatic monitoring by means of a monitoring device, not shown in detail. If it is determined in the optical monitoring after the resumption of printing activity that the print quality of the decorative image 13 corresponds to the predetermined requirements, the cut marks 8 are printed. The cut marks 8 delimit the paper section 11 and represent the beginning of the paper section 12 with a new decorative image 13.

Zur Überwachung der Druckqualität weist die optische Überwachungseinrichtung wenigstens einen optischen Sensor 15, 16 auf. Im dargestellten Ausführungsbeispiel ist der optische Sensor 15 unmittelbar auf das Dekorbild 13 gerichtet, während der optische Sensor 16 auf eine Randstreifenmarkierung 17 gerichtet ist, die parallel zum Dekor 2 randseitig verläuft und parallel und gleichzeitig zu den Dekorbildern 13 gedruckt wird. Die Randstreifenmarkierung 17 weist vorliegend eine Mehrzahl von Randstreifen 18 auf. Die einzelnen Randstreifen 18 sind farbig und entsprechen von ihrer Farbe und Anzahl der Farbe und Anzahl der aktiven Druckköpfe der Druckvorrichtung.For monitoring the print quality, the optical monitoring device has at least one optical sensor 15, 16. In the illustrated embodiment, the optical sensor 15 is directed directly to the decorative image 13, while the optical sensor 16 is directed to a marginal strip 17, which extends parallel to the decor 2 edge and parallel to the decorative images 13 is printed. The edge strip marking 17 in the present case has a plurality of edge strips 18. The individual marginal strips 18 are colored and correspond in color and number to the color and number of active printheads of the printing device.

Die beiden Sensoren 15, 16, die unmittelbar im Anschluß an den Druckerschlitten bzw. die Druckköpfe angeordnet sind, können alternativ oder aber auch gemeinsam vorgesehen sein. In jedem Falle sind die beiden Sensoren 15, 16 letztlich mit einer Steuereinrichtung 19 der Druckvorrichtung 1 gekoppelt, die wiederum einen nicht dargestellten Vergleicher aufweist, bei dem in einem Ist-Soll-Vergleich das aktuelle Druckergebnis mit dem vorgegebenen Soll-Druck-Ergebnis verglichen wird.The two sensors 15, 16, which are arranged immediately following the printer carriage or the print heads, may alternatively or also be provided jointly. In any case, the two sensors 15, 16 are ultimately coupled to a control device 19 of the printing device 1, which in turn has a comparator, not shown, in which the actual pressure result is compared with the predetermined desired pressure result in an actual target comparison ,

Bezugszeichenliste:LIST OF REFERENCE NUMBERS

11
Druckpapierprinting paper
22
Dekordecor
33
Dekorbilddecorative image
44
Randbereichborder area
55
Randbereichborder area
66
Cut-MarkierungCut-mark
77
Cut-MarkierungCut-mark
88th
Cut-MarkierungCut-mark
99
Ausrichtmarkierungalignment
1010
Papierabschnittpaper section
1111
Papierabschnittpaper section
1212
Papierabschnittpaper section
1313
Dekorbilddecorative image
1414
Dekorabschnittdecor section
1515
optischer Sensoroptical sensor
1616
optischer Sensoroptical sensor
1717
RandstreifenmarkierungEdge strip marking
1818
Farbstreifencolor stripes
1919
Steuerungcontrol
LL
Längsrichtunglongitudinal direction

Claims (11)

  1. A method for the printing of printing paper (1) from a roll using a décor (2) having at least one décor pattern (3) for use in 2-dimensional components, particularly in floor, wall, ceiling, or furniture applications, wherein cut markings (6, 7, 8) are printed on the margin of the printing paper (1) in addition to the décor (2), defining adjacent paper sections (10, 11, 12), on which the décor patterns (3) are located, and wherein the printing paper (1) is being printed by means of a digital printing method via a digital printing device,
    characterized in that
    after interruption of the printing process and subsequent continuation, at least one cut marking (6, 7, 8) is printed in dependency of the printing quality of the décor (2).
  2. The method according to claim 1, characterized in that after interruption of the printing process and subsequent continuation, at least one cut marking (6, 7, 8) is printed in dependency of the function of the digital printing device.
  3. The method according to one of the previous claims, characterized in that the print of a cut marking (6, 7, 8) may be initiated manually, and/or automatically.
  4. The method according to one of the previous claims, characterized in that the printing quality of the décor (2) may be monitored automatically.
  5. The method according to one of the previous claims, characterized in that the printing quality may be monitored by means of an optical monitoring device.
  6. The method according to one of the previous claims, characterized in that the optical monitoring device compares the current printing result to a predetermined printing quality, and in case of a predetermined conformity of the current printing result with the predetermined printing quality, automatically initiates the printing of a cut marking (6, 7, 8).
  7. The method according to one of the previous claims, characterized in that a continuous marginal strip marking (17), having at least one longitudinally extending color strip (18), extending parallel to the décor (2) is printed on the margin, and that the printing quality is monitored in dependency of the marginal strip marking (17).
  8. The method according to claim 7, characterized in that the color of the color strip (18) corresponds to the color of the print head.
  9. The method according to claim 7, characterized in that the number of color strips (18) of the marginal strip marking (17) corresponds to the number of active print heads of the printing device.
  10. A digital printing device for the printing of printing paper (1), comprising a décor (2) with at least one décor pattern (3) for use in 2-dimensional components, particularly in floor, wall, ceiling, or furniture applications, wherein an optical monitoring device is provided for monitoring the printing quality of the décor,
    characterized in that
    a controller coupled to a monitoring device is provided, which automatically initiates the printing of a cut marking (6, 7, 8) after interruption of the printing process and subsequent continuation with a predetermined conformity to the current printing process at the predetermined printing quality.
  11. The printing device according to claim 10, characterized in that the monitoring device comprises at least one optical sensor for monitoring the printing quality of the décor.
EP09772058A 2008-07-03 2009-05-29 Procédé et dispositif d'impression de papier imprimé Active EP2293946B1 (en)

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DE102008031203.7A DE102008031203C5 (en) 2008-07-03 2008-07-03 Method and digital printing device for printing on printing paper with a decor
PCT/EP2009/003834 WO2010000358A1 (en) 2008-07-03 2009-05-29 Method for imprinting printing paper and printing paper imprinted with a pattern

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US10471769B2 (en) 2014-01-10 2019-11-12 Unilin, Bvba Method for manufacturing panels having a decorative surface
US9770937B2 (en) 2014-01-10 2017-09-26 Unilin, Bvba Method for manufacturing panels having a decorative surface
US10906349B2 (en) 2014-01-10 2021-02-02 Unilin Bv Method for manufacturing panels having a decorative surface
US11878548B2 (en) 2014-01-10 2024-01-23 Flooring Industries Limited, Sarl Method for manufacturing panels having a decorative surface
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US11117410B2 (en) 2016-01-26 2021-09-14 Flooring Industries Limited, Sarl Method for manufacturing paper printable with inkjet for use as a decor paper
US11148451B2 (en) 2017-06-14 2021-10-19 Flooring Industries Limited, Sarl Method for manufacturing inkjet printable paper or foil for use as a decor paper or foil
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US11413898B2 (en) 2018-11-20 2022-08-16 Flooring Industries Limited, Sarl Decor paper or foil

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DK2293946T3 (en) 2012-05-14
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ATE542676T1 (en) 2012-02-15
PL2293946T3 (en) 2012-10-31
DE102008031203B3 (en) 2009-12-24
WO2010000358A1 (en) 2010-01-07

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