EP2429823B1 - Apparatus for printing a material web - Google Patents

Apparatus for printing a material web Download PDF

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Publication number
EP2429823B1
EP2429823B1 EP10717032.6A EP10717032A EP2429823B1 EP 2429823 B1 EP2429823 B1 EP 2429823B1 EP 10717032 A EP10717032 A EP 10717032A EP 2429823 B1 EP2429823 B1 EP 2429823B1
Authority
EP
European Patent Office
Prior art keywords
web
film
material web
station
buffer memory
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP10717032.6A
Other languages
German (de)
French (fr)
Other versions
EP2429823A1 (en
Inventor
Hans Mathea
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Heidelberger Druckmaschinen AG
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Individual
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Filing date
Publication date
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Publication of EP2429823A1 publication Critical patent/EP2429823A1/en
Application granted granted Critical
Publication of EP2429823B1 publication Critical patent/EP2429823B1/en
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Anticipated expiration legal-status Critical

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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
    • B41J15/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in continuous form, e.g. webs
    • B41J15/005—Forming loops or sags in webs, e.g. for slackening a web or for compensating variations of the amount of conveyed web material (by arranging a "dancing roller" in a sag of the web material)
    • 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
    • B41J15/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in continuous form, e.g. webs
    • B41J15/16—Means for tensioning or winding the web
    • B41J15/165—Means for tensioning or winding the web for tensioning continuous copy material by use of redirecting rollers or redirecting nonrevolving guides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H20/00—Advancing webs
    • B65H20/24—Advancing webs by looping or like devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/44—Moving, forwarding, guiding material
    • B65H2301/449—Features of movement or transforming movement of handled material
    • B65H2301/4491—Features of movement or transforming movement of handled material transforming movement from continuous to intermittent or vice versa
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2801/00—Application field
    • B65H2801/03—Image reproduction devices
    • B65H2801/12—Single-function printing machines, typically table-top machines

Definitions

  • the invention relates to a device according to the preamble of claim 1, for printing a material web, which is transportable in a transport direction through the device, and in which at least in a first station, a colorant can be applied to the material web and in at least one further station another Colorant can be applied to the material web and / or the colorant can be fixed on the material web.
  • Such a device is known in the art and is manufactured and sold, for example, by CSAT Weg für Computer-Systeme und Automatmaschine-Technik mbH, 76344 Eggenstein-Leopoldshafen.
  • an aluminum foil which is taken from a Abwicklerrolle be printed in color.
  • the device has four print heads, which are arranged one behind the other in the transport direction of the film and each apply a different color to the film.
  • Coloring agent in the context of the present invention may also be black ink or black toner.
  • Each of the printheads generates a partial image corresponding to its color on the film.
  • the sub-images generated by the printheads are superimposed, so that behind the last printhead from the individual colors of the printheads composite colored overall image is present.
  • a fixing unit is arranged, by means of which the image produced by the printheads on the film can be fixed.
  • the film In order to produce a finished image on the film, the film must thus travel a predetermined distance through the printing device. The distance traveled by the film in producing a finished image corresponds to the length of the film from the beginning of the first print head to the end of the fuser unit.
  • the film is moved after completion of the last image in the fixing unit by the respective path against its transport direction. This ensures that the film has no unprinted area when the printing device is put back into operation.
  • the images applied to the film consist of a plurality of superposed sub-images of different colors, it is necessary that the film with the highest precision by the printing device, that is guided in particular past the printheads. The slightest shift in position of the film would result in the partial images no longer being congruently applied to the film, thereby blurring the contours of the image.
  • US-A-2 004/0177779 discloses a printing device for printing a material web, wherein in the transport direction of the material web before and after a printing station in each case a buffer memory is arranged.
  • the length of the material web located in the buffer memories can be varied by the movement of a carriage. The purpose of this arrangement is to allow different speeds of the material web at the printing station at constant entry and exit speeds of the web to and from the device.
  • a device for printing a material web which is transportable in a transport direction through the device, and in which at least in a first station, a colorant can be applied to the material web, and in at least one further station another colorant applied to the material web and / or the colorant is fixable on the material web, characterized in that in the transport direction of the material web in front of the first station, a first buffer memory is arranged.
  • a first buffer memory is arranged in the transport direction of the web upstream of the first station, it can be dispensed with when terminating the printing operation to move the web as a whole against its transport direction.
  • the material web need not be moved backwards in the transport direction of the material web before the first station. Instead of moving the web as a whole backwards, that is, for example, wind up again on a take-off reel, which is removed during normal operation, the moved back portion of the web is received by the first buffer memory, whereby the located before the first buffer material web is not moved. In this way it can be avoided that the material web leaves its correct position in this area. This has a very beneficial effect on the quality of the images to be generated.
  • a second buffer memory is arranged behind the further station.
  • the second buffer memory is achieved that the material web seen in the transport direction of the material web behind the device when moving back of the device located in the part of the web does not need to be moved against the in the transport direction of the web.
  • the backward movement of the non-printed area of the material web present in the device is made possible by the fact that as much material web as can be moved backwards can be taken from the second buffer store. In this way, the movement of the part of the material web arranged in the transport direction of the material web behind the further station or behind the second buffer store is decoupled from the movement of the part of the material web located in the device.
  • the second buffer takes on the termination of the printing operation at least as much web as required, so that the last started image is completed.
  • the second buffer memory is forcibly connected to the first buffer memory.
  • the tension in the transport direction of the film on the film remains substantially constant during the conversion of the film from one buffer to the other buffer.
  • This also has a very advantageous effect on the accuracy of the position of the film.
  • Under duress control is understood in the context of the invention that the memory always picks up or emits as much material web as the other memory emits or absorbs.
  • the forced control can be realized mechanically or electronically.
  • At least one buffer memory has a storage roller, or preferably both buffer storage devices have a storage roller which is or will be wrapped around the material web as in a so-called dancer roller.
  • a buffer memory can be produced particularly simply and, on the other hand, it can be designed so precisely that the material web undergoes virtually no lateral displacement during transport into the buffer memory or during transport out of the buffer reservoir.
  • a particularly high precision can be achieved in that the storage rollers are not elastic or have no elastic surface.
  • the storage rollers are formed of metal.
  • the storage rollers are arranged on a carriage.
  • the storage rollers can be adjusted in a simple manner, that is, a simple and accurate redistribution of foil from one buffer to reach the other buffer memory.
  • the second buffer store it is possible in a very simple manner for the second buffer store to be force-controlled with the first buffer store connected is. Because, since both storage rollers perform exactly the same movement, it is achieved that the one buffer storage is fed exactly as much material web as the other buffer memory is removed.
  • the storage rollers are arranged in such a way that both legs lie or lie at least one leg of the loop formed by the first storage roller of the first buffer store in or parallel to a plane in which the legs in question or the leg in question pass through the second storage roll of the second buffer formed loop are or is located.
  • the storage rollers are arranged such that the respective regions of the material web located in the storage buffers run along one or two parallel straight lines. That is, the respective areas of the web lead during the adjustment of the storage rollers in the direction of the surface normal of the web no movement.
  • sensors are provided for detecting the end positions of the carriage.
  • the sensors which are preferably designed as inductive or capacitive sensors, thus the adjustment of the carriage can be adjusted. Therefore, the Sensors advantageously designed adjustable in the direction of movement of the carriage.
  • a further advantageous embodiment of the invention is characterized in that at least one clamping device is provided for fixing the material web.
  • the clamping device which is preferably arranged between the further station and a winding roller for the printed material web, it can be achieved that the material web is fixed in its transport direction behind the second buffer memory when the material web is transferred from the second buffer memory in the first buffer memory and vice versa.
  • a tensioning device is arranged in front of the first station, by means of which the material web is durable under tension at least in the area of the first station and the further station.
  • a clamping device may also be arranged in front of the first station.
  • the material web of an unwinder roll can be removed against a force. This can be achieved in a simple manner that the web is constantly under tension in the direction of transport of the web.
  • the single figure shows a schematic arrangement of a device designed according to the invention.
  • a device has a first station 1, in which four print heads 1 a, 1 b, 1 c, 1 d are arranged.
  • the printheads 1 a, 1 b, 1 c, 1 d contain differently colored ink. So the printhead contains 1 d of black ink.
  • the printheads 1 a, 1 b, 1 c contain cyan, magenta and yellow inks
  • a film 3 to be printed Arranged under the print heads is a film 3 to be printed, which is guided past the print heads 1a, 1b, 1c, 1d in a transport direction represented by an arrow 3 '.
  • a further station 2 designed as a fixing unit is arranged behind the first station 1.
  • the device pulleys 4, 5, 6, 7.
  • This structure corresponds to a conventional apparatus for printing a web.
  • a partial image corresponding to the relevant color is respectively produced on the film 3. Only after the relevant area of the film 3 has passed all printheads, the corresponding color image is ready. The color image is then passed past the fixing unit 2, where it is fixed. In order to produce a finished image, the film 3 thus has to cover a distance located between the locations marked with arrows 3a and 3b. That is, when switching off the printing device, the film 3 must be transported by the said path to complete the last image generated by the printhead 1a.
  • the device Since no new image is applied to the film 3 during this process, is located after completion of the last image between the two marks 3a, 3b unprinted film. So that the film 3 is printed continuously after recommissioning of the device, the film 3 must be around this Way against the transport direction 3 'of the film 3 are moved back.
  • the device has a first storage roller 5a around which the film 3 is deflected in the transport direction 3 'of the film 3 in front of the first deflection roller 5. As a result, the film 3 forms a first U-shaped loop, in the base of which the first storage roller 5a is arranged.
  • the device has a second storage roller 4a, around which the film 3 is deflected in the transport direction 3 'of the film 3 behind the second deflection roller 4.
  • the film 3 forms a second U-shaped loop, in the base of the second storage roller 4a is arranged.
  • the storage rollers 4a, 5a are arranged on a carriage 8, which is arranged displaceably on a linear guide 8a.
  • the second buffer memory is forcibly connected to the first buffer memory.
  • the deflection rollers 4, 5, 6, 7 and the storage rollers 4a, 5a are made of metal. As a result, they have a low coefficient of friction, which has a very advantageous effect when aligning the material web 3 transversely to the transport direction 3 '. Furthermore, the deflection rollers 4, 5, 6, 7 and the storage rollers 4a, 5a can be arranged very robust. This gives a rigid structure in the buffer memory, which also has a very beneficial effect on the running accuracy of the film 3.
  • the storage rollers 4a, 5a are each arranged in the manner of a dancer roller in the bottom of a U-shaped loop, they form with the respective deflection rollers 4, 5 each have a buffer memory.
  • the film 3 can be moved around the non-printed area arranged between the markings 3a, 3b, counter to its transport direction 3 ', when the carriage 8 is moved from left to right in the figure. Because this reduces the content of the second buffer memory whereas the content of the first buffer memory increases.
  • the device should preferably be constructed so that the path between the markers 3a, 3b is as small as possible.
  • inductive position sensors 9a, 9b are provided.
  • the carriage 8 can also be adjusted by means of a servomotor 8b.
  • the adjustment path of the carriage 8 can also be controlled in a simple manner.
  • the third deflection roller 6 is designed as a rotary encoder. As a result, the distance covered by the film 3 can be detected. In particular, by means of the rotary encoder 6, the distance traveled by the film 3 during the redeployment of the film can be detected by a buffer memory in the other buffer memory. This also allows the adjustment of the carriage 8 set.
  • the storage rollers 4a, 5a are arranged at such a height below the deflection rollers 4, 5 that their distance from one another corresponds to the thickness of the film 3, when the storage rollers 4a, 5a and the deflection rollers 4, 5 are opposite.
  • the leg of the first loop located between the first storage roller 5a and the first deflection roller 5 lies in the same Level, such as the located between the second storage roller 4a and the second guide roller 4 legs of the second loop.
  • the distance between the storage rollers 4a, 5a must be changed by the guide rollers 4, 5 the distance between the storage rollers 4a, 5a of the guide rollers 4, 5 can be selected such that it the thickness of the strongest film to be printed with the device. With this distance then thinner films are printed. Of course, the thickness of the films to be printed with the device must not differ too much from each other.
  • a clamping device formed by a roller 11a and a friction pad 11b is arranged between the second deflection roller 4a and the drive of the film 3 consisting of the drive shaft 12 and the drive roller 12a.
  • a tensioning device is arranged, by means of which the film 3 is held under tension.
  • the tensioning device consists of a pressure roller 10a and a DC generator 10.
  • the DC generator 10 can be on the film 3 exercise a train.
  • a dancer roller 14 is arranged between the tensioning device 10, 10a and the unwinding roller 13, a dancer roller 14 is arranged.
  • the dancer roller 14 the unwinding of the film 3 can be controlled by the unwinding roller 12 in a known manner.
  • the device may further storage rollers 4a ', 5a', which above the storage rollers 4a, 5a on the Carriage 8 are arranged.
  • further deflection rollers 4 ', 5' can thus form two more buffer memory, which have the same capacity as the previously described buffer memory 4, 5.
  • the elements of the additional buffer memory and the corresponding path of the film are shown in dashed lines in the figure.

Landscapes

  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Handling Of Continuous Sheets Of Paper (AREA)

Description

Die Erfindung betrifft eine Vorrichtung nach dem Oberbegriff des Anspruchs 1, zum Bedrucken einer Materialbahn, welche in eine Transportrichtung durch die Vorrichtung transportierbar ist, und bei welcher wenigstens in einer ersten Station ein Farbmittel auf die Materialbahn aufbringbar ist und in wenigstens einer weiteren Station ein weiteres Farbmittel auf die Materialbahn aufbringbar und/oder das Farbmittel auf der Materialbahn fixierbar ist.The invention relates to a device according to the preamble of claim 1, for printing a material web, which is transportable in a transport direction through the device, and in which at least in a first station, a colorant can be applied to the material web and in at least one further station another Colorant can be applied to the material web and / or the colorant can be fixed on the material web.

Eine derartige Vorrichtung ist dem Stand der Technik bekannt und wird beispielsweise von der Firma CSAT Gesellschaft für Computer-Systeme und Automatisierungs-Technik mbH, 76344 Eggenstein-Leopoldshafen hergestellt und vertrieben. Mittels der bekannten Vorrichtung kann beispielsweise eine Aluminiumfolie, welche einer Abwicklerrolle entnommen wird, farbig bedruckt werden. Hierzu weist die Vorrichtung vier Druckköpfe auf, welche in Transportrichtung der Folie hintereinander angeordnet sind und jeweils eine andere Farbe auf die Folie aufbringen. Farbmittel im Sinne der vorliegenden Erfindung kann auch schwarze Tinte oder schwarzer Toner sein.Such a device is known in the art and is manufactured and sold, for example, by CSAT Gesellschaft für Computer-Systeme und Automatisierung-Technik mbH, 76344 Eggenstein-Leopoldshafen. By means of the known device, for example, an aluminum foil, which is taken from a Abwicklerrolle be printed in color. For this purpose, the device has four print heads, which are arranged one behind the other in the transport direction of the film and each apply a different color to the film. Coloring agent in the context of the present invention may also be black ink or black toner.

Jeder der Druckköpfe erzeugt auf der Folie ein seiner Farbe entsprechendes Teilbild. Die von den Druckköpfen erzeugten Teilbilder liegen übereinander, so dass hinter dem letzten Druckkopf ein aus den einzelnen Farben der Druckköpfen zusammengesetztes farbiges Gesamtbild vorhanden ist.Each of the printheads generates a partial image corresponding to its color on the film. The sub-images generated by the printheads are superimposed, so that behind the last printhead from the individual colors of the printheads composite colored overall image is present.

In Transportrichtung der Folie hinter den Druckköpfen ist eine Fixiereinheit angeordnet, mittels welcher das von den Druckköpfen auf der Folie erzeugte Bild fixiert werden kann. Zur Erzeugung eines fertigen Bildes auf der Folie muss die Folie somit einen vorbestimmten Weg durch die Druckvorrichtung zurück legen. Die von der Folie bei der Erzeugung eines fertigen Bildes zurückgelegte Strecke entspricht der Länge der Folie vom Anfang des ersten Druckkopfes bis zum Ende der Fixiereinheit.In the transport direction of the film behind the printheads, a fixing unit is arranged, by means of which the image produced by the printheads on the film can be fixed. In order to produce a finished image on the film, the film must thus travel a predetermined distance through the printing device. The distance traveled by the film in producing a finished image corresponds to the length of the film from the beginning of the first print head to the end of the fuser unit.

Daher ist es beim Beenden des Druckbetriebs erforderlich, dass das letzte angefangene Bild so lange durch die Druckvorrichtung transportiert wird, bis es die Fixiereinheit passiert hat. Da sich zu diesem Zeitpunkt einer von den Druckköpfen nicht mit Farbe versehener Bereich der Folie in der Druckvorrichtung, das heißt unter den Druckköpfen befindet, wird die Folie nach Fertigstellung des letzten Bildes in der Fixiereinheit um den betreffenden Weg entgegen ihrer Transportrichtung zurück bewegt. Hierdurch wird erreicht, dass die Folie keinen unbedruckten Bereich aufweist, wenn die Druckvorrichtung wieder in Betrieb genommen wird.Therefore, when finishing the printing operation, it is required that the last started image be transported by the printing device until it has passed the fixing unit. Since at this time a not provided by the printhead portion of the film in the printing device, that is located under the printheads, the film is moved after completion of the last image in the fixing unit by the respective path against its transport direction. This ensures that the film has no unprinted area when the printing device is put back into operation.

Da die auf der Folie aufgebrachten Bilder aus mehreren übereinander angeordneter Teilbilder unterschiedlicher Farben bestehen, ist es erforderlich, dass die Folie mit höchster Präzision durch die Druckvorrichtung, das heißt insbesondere an den Druckköpfen vorbei geführt wird. Geringste Positionsverschiebungen der Folie würden dazu führen, dass die Teilbilder nicht mehr deckungsgleich auf die Folie aufgebracht werden, wodurch die Konturen des Bildes unscharf werden.Since the images applied to the film consist of a plurality of superposed sub-images of different colors, it is necessary that the film with the highest precision by the printing device, that is guided in particular past the printheads. The slightest shift in position of the film would result in the partial images no longer being congruently applied to the film, thereby blurring the contours of the image.

Durch das Zurückziehen der Folie nach der Fertigstellung des letzten Bildes entsteht insbesondere in seitlicher Richtung, das heißt quer zur Transportrichtung der Folie, eine Positionsverschiebung. Erst im Verlauf des Druckbetriebes nimmt die Folie wieder ihre korrekte Position ein. Das heißt, die Folie verändert bei der Wiederinbetriebnahme der Druckvorrichtung während des Druckbetriebs ausgehend von ihrer fehlerhaften Position kontinuierlich ihre Position, bis sie wieder in ihrer korrekten Position verläuft. Die während dieser Zeit aufder Folie erzeugten Bilder haben daher eine unbefriedigende Qualität..By retracting the film after the completion of the last image arises in particular in the lateral direction, that is transversely to the transport direction of the film, a positional shift. Only in the course of printing operation, the film returns to its correct position. That is, when the printing device is restarted during printing operation, the film continuously changes its position from its erroneous position until it returns to its correct position. The images produced on the film during this time therefore have an unsatisfactory quality.

US-A-2 004/0177779 offenbart eine Druckvorrichtung zum Bedrucken einer Materialbahn, wobei in Transportrichtung der Materialbahn vor und nach einem Druckstation jeweils ein Pufferspeicher angeordnet ist. Die in den Pufferspeichern befindliche Länge der Materialbahn kann durch die Bewegung einen Schlitten variiert werden. Zweck dieser Anordnung ist es, bei konstanten Ein - und Auslaufgeschwindigkeiten der Materialbahn zu und von der vorrichtung, unterschiedliche Geschwindigkeiten der Materialbahn bei dem Druckstation zu ermöglichen. US-A-2 004/0177779 discloses a printing device for printing a material web, wherein in the transport direction of the material web before and after a printing station in each case a buffer memory is arranged. The length of the material web located in the buffer memories can be varied by the movement of a carriage. The purpose of this arrangement is to allow different speeds of the material web at the printing station at constant entry and exit speeds of the web to and from the device.

Es ist Aufgabe der Erfindung, eine Eingangs genannte Druckvorrichtung derart auszubilden, dass der Qualitätsverlust der mit ihr erzeugten Bilder bei einem Wiederanlauf sehr gering ist.It is an object of the invention to form an input called printing device such that the loss of quality of the images generated with it is very low at a restart.

Die Lösung dieser Aufgabe ergibt sich aus den Merkmalen des kennzeichnenden Teils des Anspruchs 1. Vorteilhafte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen.The solution of this problem arises from the features of the characterizing part of claim 1. Advantageous developments of the invention will become apparent from the dependent claims.

Gemäß der Erfindung ist eine Vorrichtung zum Bedrucken einer Materialbahn, welche in einer Transportrichtung durch die Vorrichtung transportierbar ist, und bei welcher wenigstens in einer ersten Station ein Farbmittel auf die Materialbahn aufbringbar ist, und in wenigstens einer weiteren Station ein weiteres Farbmittel auf die Materialbahn aufbringbar und/oder das Farbmittel auf der Materialbahn fixierbar ist, dadurch gekennzeichnet, dass in Transportrichtung der Materialbahn vor der ersten Station ein erster Pufferspeicher angeordnet ist.According to the invention, a device for printing a material web, which is transportable in a transport direction through the device, and in which at least in a first station, a colorant can be applied to the material web, and in at least one further station another colorant applied to the material web and / or the colorant is fixable on the material web, characterized in that in the transport direction of the material web in front of the first station, a first buffer memory is arranged.

Dadurch, dass in Transportrichtung der Materialbahn vor der ersten Station ein erster Pufferspeicher angeordnet ist, kann beim Beenden des Druckbetriebs darauf verzichtet werden, die Materialbahn insgesamt entgegen ihrer Transportrichtung zu bewegen. Insbesondere braucht die Materialbahn in Transportrichtung der Materialbahn gesehen vor der ersten Station nicht rückwärts bewegt werden. Statt die Materialbahn insgesamt rückwärts zu bewegen, das heißt beispielsweise wieder auf eine Abwickelrolle aufzuwickeln, der sie im Normalbetrieb entnommen wird, wird der zurück bewegte Bereich der Materialbahn von dem ersten Pufferspeicher aufgenommen, wodurch die sich vor dem ersten Pufferspeicher befindliche Materialbahn nicht bewegt wird. Hierdurch kann vermieden werden, dass die Materialbahn in diesem Bereich ihre korrekte Position verlässt. Dies wirkt sich sehr vorteilhaft auf die Qualität der zu erzeugenden Bilder aus.Characterized in that a first buffer memory is arranged in the transport direction of the web upstream of the first station, it can be dispensed with when terminating the printing operation to move the web as a whole against its transport direction. In particular, the material web need not be moved backwards in the transport direction of the material web before the first station. Instead of moving the web as a whole backwards, that is, for example, wind up again on a take-off reel, which is removed during normal operation, the moved back portion of the web is received by the first buffer memory, whereby the located before the first buffer material web is not moved. In this way it can be avoided that the material web leaves its correct position in this area. This has a very beneficial effect on the quality of the images to be generated.

In besonders vorteilhafter Weise ist in Transportrichtung der Materialbahn gesehen hinter der weiteren Station ein zweiter Pufferspeicher angeordnet. Durch den zweiten Pufferspeicher wird erreicht, dass die Materialbahn in Transportrichtung der Materialbahn gesehen hinter der Vorrichtung beim Zurückbewegen des sich in der Vorrichtung befindlichen Teils der Materialbahn nicht entgegen der in Transportrichtung der Materialbahn bewegt zu werden braucht. Die Rückwärtsbewegung des in der Vorrichtung vorhandenen nicht bedruckten Bereichs der Materialbahn wird dadurch ermöglicht, dass dem zweiten Pufferspeicher so viel Materialbahn entnommen werden kann, wie rückwärts bewegt werden muss. Hierdurch ist die Bewegung des in Transportrichtung der Materialbahn hinter der weiteren Station beziehungsweise hinter dem zweiten Pufferspeicher angeordneten Teils der Materialbahn von der Bewegung des sich in der Vorrichtung befindlichen Teils der Materialbahn entkoppelt. Der zweite Pufferspeicher nimmt beim Beenden des Druckbetriebs wenigstens soviel Materialbahn auf, wie erforderlich ist, damit das letzte angefangene Bild fertig gestellt wird. Durch die beiden Pufferspeicher wird erreicht, dass die Bewegung der Materialbahn in Transportrichtung der Materialbahn vor dem ersten Pufferspeicher und hinter dem zweiten Pufferspeicher von der Bewegung der Materialbahn zwischen den beiden Pufferspeichern entkoppelt ist.In a particularly advantageous manner, as seen in the transport direction of the material web, a second buffer memory is arranged behind the further station. By the second buffer memory is achieved that the material web seen in the transport direction of the material web behind the device when moving back of the device located in the part of the web does not need to be moved against the in the transport direction of the web. The backward movement of the non-printed area of the material web present in the device is made possible by the fact that as much material web as can be moved backwards can be taken from the second buffer store. In this way, the movement of the part of the material web arranged in the transport direction of the material web behind the further station or behind the second buffer store is decoupled from the movement of the part of the material web located in the device. The second buffer takes on the termination of the printing operation at least as much web as required, so that the last started image is completed. By the two buffer memory is achieved that the movement of the web in the transport direction of the web is decoupled before the first buffer memory and behind the second buffer memory of the movement of the web between the two buffer memories.

Dadurch, dass der sich in der Vorrichtung befindliche Teil der Materialbahn vom ersten Pufferspeicher aufgenommen wird, erfolgt praktisch eine Umschichtung von sich im zweiten Pufferspeicher befindlicher Materialbahn in den ersten Pufferspeicher. Da die Anzahl der hierzu benötigten Bauelemente begrenzt ist, lassen sich diese mit vertretbaren Kosten höchst präzise ausbilden. Durch die präzise Ausbildung der Pufferspeicher kann sicher gestellt werden, dass die Folie vom Transport des zweiten Pufferspeichers in den ersten Pufferspeicher nahezu keine seitliche Positionsverschiebung erfährt.Due to the fact that the part of the material web located in the device is picked up by the first buffer store, there is practically a redeployment of material web located in the second buffer store into the first buffer store. Since the number of components required for this purpose is limited, they can be formed highly precisely at a reasonable cost. Due to the precise design of the buffer memory can be ensured that the film undergoes almost no lateral position shift from the transport of the second buffer memory in the first buffer memory.

In vorteilhafter Weise ist der zweite Pufferspeicher mit dem ersten Pufferspeicher zwangsgesteuert verbunden. Hierdurch kann erreicht werden, dass der in Transportrichtung der Folie auf die Folie lastende Zug bei der Umsetzung der Folie von einem Pufferspeicher in den anderen Pufferspeicher im Wesentlichen konstant bleibt. Auch dies wirkt sich sehr vorteilhaft auf die Genauigkeit der Position der Folie aus. Unter Zwangssteuerung wird im Sinne der Erfindung verstanden, dass der eine Speicher immer so viel Materialbahn aufnimmt beziehungsweise abgibt wie der andere Speicher abgibt beziehungsweise aufnimmt. Die Zwangsteuerung kann mechanisch oder elektronisch realisiert sein.Advantageously, the second buffer memory is forcibly connected to the first buffer memory. In this way it can be achieved that the tension in the transport direction of the film on the film remains substantially constant during the conversion of the film from one buffer to the other buffer. This also has a very advantageous effect on the accuracy of the position of the film. Under duress control is understood in the context of the invention that the memory always picks up or emits as much material web as the other memory emits or absorbs. The forced control can be realized mechanically or electronically.

Bei einer weiteren besonderen Ausführungsform der Erfindung ist vorgesehen, dass wenigstens ein Pufferspeicher eine Speicherwalze aufweist, beziehungsweise vorzugsweise beide Pufferspeicher eine Speicherwalze aufweisen, welche wie bei einer so genannten Tänzerwalze von der Materialbahn umschlungen wird beziehungsweise werden. Ein derartiger Pufferspeicher lässt sich einerseits besonders einfach herstellen und kann andererseits so präzise ausgebildet werden, dass die Materialbahn beim Transport in den Pufferspeicher beziehungsweise beim Transport aus dem Pufferspeicher nahezu keine seitliche Verschiebung erfährt. Eine besonders hohe Präzision kann dadurch erreicht werden, dass die Speicherwalzen nicht elastisch ausgebildet sind beziehungsweise keine elastische Oberfläche aufweisen. In vorteilhafter Weise sind die Speicherwalzen aus Metall ausgebildet.In a further particular embodiment of the invention, it is provided that at least one buffer memory has a storage roller, or preferably both buffer storage devices have a storage roller which is or will be wrapped around the material web as in a so-called dancer roller. On the one hand, such a buffer memory can be produced particularly simply and, on the other hand, it can be designed so precisely that the material web undergoes virtually no lateral displacement during transport into the buffer memory or during transport out of the buffer reservoir. A particularly high precision can be achieved in that the storage rollers are not elastic or have no elastic surface. Advantageously, the storage rollers are formed of metal.

Besonders vorteilhaft bei der letztgenannten Ausführungsform ist es, wenn die Speicherwalzen auf einem Schlitten angeordnet sind. Hierdurch lassen sich die Speicherwalzen auf einfache Weise verstellen, das heißt eine einfache und genaue Umschichtung von Folie aus dem einen Pufferspeicher in den anderen Pufferspeicher erreichen. Des Weiteren lässt sich dann, wenn die Speicherwalzen auf einem gemeinsamen Schlitten angeordnet sind, auf sehr einfache Weise erreichen, dass der zweite Pufferspeicher mit dem ersten Pufferspeicher zwangsgesteuert verbunden ist. Denn, da beide Speicherwalzen exakt dieselbe Bewegung ausführen, wird erreicht, dass dem einen Pufferspeicher exakt soviel Materialbahn zugeführt wird, wie dem anderen Pufferspeicher entnommen wird.Particularly advantageous in the latter embodiment, it is when the storage rollers are arranged on a carriage. As a result, the storage rollers can be adjusted in a simple manner, that is, a simple and accurate redistribution of foil from one buffer to reach the other buffer memory. Furthermore, when the storage rollers are arranged on a common carriage, it is possible in a very simple manner for the second buffer store to be force-controlled with the first buffer store connected is. Because, since both storage rollers perform exactly the same movement, it is achieved that the one buffer storage is fed exactly as much material web as the other buffer memory is removed.

Sehr vorteilhaft ist es, wenn die Speicherwalzen derart angeordnet sind, dass beide Schenkel zumindest jedoch ein Schenkel der durch die erste Speicherwalze des ersten Pufferspeichers gebildeten Schleife in oder parallel zu einer Ebene liegen beziehungsweise liegt, in der die betreffenden Schenkel beziehungsweise der betreffende Schenkel der durch die zweite Speicherwalze des zweiten Pufferspeichers gebildeten Schleife liegen beziehungsweise liegt. Mit anderen Worten, die Speicherwalzen sind derart angeordnet, dass die betreffenden Bereiche der sich in den Pufferspeichern befindlichen Materialbahn entlang einer oder zweier parallelen Geraden verlaufen. Das heißt, die betreffenden Bereiche der Materialbahn führen während der Verstellung der Speicherwalzen in Richtung der Flächennormalen der Materialbahn keine Bewegung aus.It is very advantageous if the storage rollers are arranged in such a way that both legs lie or lie at least one leg of the loop formed by the first storage roller of the first buffer store in or parallel to a plane in which the legs in question or the leg in question pass through the second storage roll of the second buffer formed loop are or is located. In other words, the storage rollers are arranged such that the respective regions of the material web located in the storage buffers run along one or two parallel straight lines. That is, the respective areas of the web lead during the adjustment of the storage rollers in the direction of the surface normal of the web no movement.

Durch die vorstehend beschriebene Anordnung der Speicherwalzen soll im Prinzip erreicht werden, dass die beiden Schenkel der Schleife jeweils parallel zueinander verlaufen. Dementsprechend müssen dann auch die Elemente angeordnet sein, um die die dem Grund der Schleife abgewandten Enden der Materialbahn umgelenkt werden. Im Hinblick darauf, dass bei unterschiedlich dicken Materialbahnen die Anordnung der Speicherwalzen verändert werden müsste, kann jedoch eine geringe Abweichung von einer exakten Parallelität der Schenkel der Schleifen abgesehen werden.By the above-described arrangement of the storage rollers to be achieved in principle that the two legs of the loop each extend parallel to each other. Accordingly, the elements must then be arranged around which the ends of the material web facing away from the bottom of the loop are deflected. In view of the fact that the arrangement of the storage rollers would have to be changed with different thickness material webs, however, a slight deviation from an exact parallelism of the legs of the loops can be dispensed with.

Bei einer weiteren Ausführungsform der Erfindung ist vorgesehen, dass Sensoren vorhanden sind, zur Erfassung der Endpositionen des Schlittens. Mittels der Sensoren, welche vorzugsweise als induktive oder kapazitive Sensoren ausgebildet sind, lässt sich somit der Verstellweg des Schlittens einstellen. Daher sind die Sensoren in vorteilhafter Weise in Bewegungsrichtung des Schlittens verstellbar ausgebildet.In a further embodiment of the invention it is provided that sensors are provided for detecting the end positions of the carriage. By means of the sensors, which are preferably designed as inductive or capacitive sensors, thus the adjustment of the carriage can be adjusted. Therefore, the Sensors advantageously designed adjustable in the direction of movement of the carriage.

Eine weitere vorteilhafte Ausführungsform der Erfindung ist dadurch gekennzeichnet, dass zumindest eine Klemmvorrichtung vorhanden ist, zur Fixierung der Materialbahn. Durch die Klemmvorrichtung, welche vorzugsweise zwischen der weiteren Station und einer Aufwickelrolle für die bedruckte Materialbahn angeordnet ist, lässt sich erreichen, dass die Materialbahn in ihrer Transportrichtung hinter dem zweiten Pufferspeicher fixiert ist, wenn die Materialbahn von dem zweiten Pufferspeicher in den ersten Pufferspeicher umgeschichtet wird und umgekehrt.A further advantageous embodiment of the invention is characterized in that at least one clamping device is provided for fixing the material web. By the clamping device, which is preferably arranged between the further station and a winding roller for the printed material web, it can be achieved that the material web is fixed in its transport direction behind the second buffer memory when the material web is transferred from the second buffer memory in the first buffer memory and vice versa.

Vorzugsweise ist vor der ersten Station eine Spannvorrichtung angeordnet, mittels der die Materialbahn zumindest im Bereich der ersten Station und der weiteren Station unter Zugspannung haltbar ist. Vor der ersten Station kann statt dessen oder zusätzlich ebenfalls eine Klemmvorrichtung angeordnet sein. Hierdurch lässt sich der sich in der Vorrichtung befindliche Teil der Materialbahn beziehungsweise der sich in den Pufferspeichern befindliche Bereich der Materialbahn von der übrigen Materialbahn entkoppeln.Preferably, a tensioning device is arranged in front of the first station, by means of which the material web is durable under tension at least in the area of the first station and the further station. Instead of or in addition, a clamping device may also be arranged in front of the first station. As a result, the part of the material web located in the device or the region of the material web located in the buffer memories can be decoupled from the remaining material web.

Bei einer weiteren besonderen Ausführungsform der Erfindung ist vorgesehen, dass die Materialbahn einer Abwicklerrolle gegen eine Kraft entnehmbar ist. Hierdurch kann auf einfache Weise erreicht werden, dass die Materialbahn in Richtung der Transportrichtung der Materialbahn ständig unter Spannung steht.In a further particular embodiment of the invention, it is provided that the material web of an unwinder roll can be removed against a force. This can be achieved in a simple manner that the web is constantly under tension in the direction of transport of the web.

Weitere Einzelheiten, Merkmale und Vorteile der vorliegenden Erfindung ergeben sich aus der nachfolgenden Beschreibung eines besonderen Ausführungsbeispiels unter Bezugnahme auf die Zeichnung.Further details, features and advantages of the present invention will become apparent from the following description of a particular embodiment with reference to the drawings.

Es zeigt die einzige Figur eine schematische Anordnung einer erfindungsgemäß ausgebildeten Vorrichtung.The single figure shows a schematic arrangement of a device designed according to the invention.

Wie der Figur entnommen werden kann, weist eine erfindungsgemäße Vorrichtung eine erste Station 1 auf, in der vier Druckköpfe 1 a, 1b, 1c, 1d angeordnet sind. Die Druckköpfe 1 a, 1 b, 1 c, 1 d enthalten verschiedenfarbige Tinte. So enthält der Druckkopf 1 d schwarze Tinte. Die Druckköpfe 1 a, 1 b, 1 c enthalten Tinte der Farben Cyan, Magenta und GelbAs can be seen from the figure, a device according to the invention has a first station 1, in which four print heads 1 a, 1 b, 1 c, 1 d are arranged. The printheads 1 a, 1 b, 1 c, 1 d contain differently colored ink. So the printhead contains 1 d of black ink. The printheads 1 a, 1 b, 1 c contain cyan, magenta and yellow inks

Unter den Druckköpfen ist eine zu bedruckende Folie 3 angeordnet, welche in eine durch einen Pfeil 3' dargestellte Transportrichtung an den Druckköpfen 1a, 1 b, 1 c, 1 d vorbeigeführt wird. In Transportrichtung 3' ist hinter der ersten Station 1 einer als Fixiereinheit ausgebildete weitere Station 2 angeordnet. Zur Führung der Folie 3 weist die Vorrichtung Umlenkrollen 4, 5, 6, 7 auf. Zum Transport der Folie 3 wird diese in Transportrichtung 3' der Folie 3 mittels einer Andruckrolle 12a auf eine elektromotorisch angetriebene Antriebswelle 12 gedrückt. Dieser Aufbau entspricht einer herkömmlichen Vorrichtung zum Bedrucken einer Materialbahn.Arranged under the print heads is a film 3 to be printed, which is guided past the print heads 1a, 1b, 1c, 1d in a transport direction represented by an arrow 3 '. In the transport direction 3 ', a further station 2 designed as a fixing unit is arranged behind the first station 1. To guide the film 3, the device pulleys 4, 5, 6, 7. To transport the film 3, it is pressed in the direction of transport 3 'of the film 3 by means of a pressure roller 12a onto an electric motor-driven drive shaft 12. This structure corresponds to a conventional apparatus for printing a web.

Mittels der Druckköpfe 1a, 1 b, 1c, 1d wird jeweils ein der betreffenden Farbe entsprechendes Teilbild auf der Folie 3 erzeugt. Erst nachdem der betreffende Bereich der Folie 3 an allen Druckköpfen vorbeigeführt wurde, ist das entsprechende Farbbild fertig. Das Farbbild wird dann an der Fixiereinheit 2 vorbeigeführt, wo es fixiert wird. Um ein fertiges Bild zu erzeugen, muss die Folie 3 somit eine sich zwischen den mit Pfeilen 3a und 3b markierten Orten befindliche Wegstrecke zurücklegen. Das heißt, beim Abschalten der Druckvorrichtung muss die Folie 3 zur Vervollständigung des zuletzt vom Druckkopf 1a erzeugten Teilbildes um den genannten Weg weiter transportiert werden.By means of the print heads 1a, 1b, 1c, 1d, a partial image corresponding to the relevant color is respectively produced on the film 3. Only after the relevant area of the film 3 has passed all printheads, the corresponding color image is ready. The color image is then passed past the fixing unit 2, where it is fixed. In order to produce a finished image, the film 3 thus has to cover a distance located between the locations marked with arrows 3a and 3b. That is, when switching off the printing device, the film 3 must be transported by the said path to complete the last image generated by the printhead 1a.

Da während dieses Vorgangs kein neues Bild auf die Folie 3 aufgebracht wird, befindet sich nach Fertigstellung des letzten Bildes zwischen den beiden Markierungen 3a, 3b unbedruckte Folie. Damit die Folie 3 nach einer Wiederinbetriebnahme der Vorrichtung kontinuierlich bedruckt wird, muss die Folie 3 um diesen Weg entgegen der Transportrichtung 3' der Folie 3 zurück bewegt werden. Hierzu weist die Vorrichtung eine erste Speicherwalze 5a auf, um welche die Folie 3 in Transportrichtung 3' der Folie 3 vor der ersten Umlenkrolle 5 umgelenkt wird. Dadurch bildet die Folie 3 eine erste U-förmige Schleife, in deren Grund die erste Speicherwalze 5a angeordnet ist.Since no new image is applied to the film 3 during this process, is located after completion of the last image between the two marks 3a, 3b unprinted film. So that the film 3 is printed continuously after recommissioning of the device, the film 3 must be around this Way against the transport direction 3 'of the film 3 are moved back. For this purpose, the device has a first storage roller 5a around which the film 3 is deflected in the transport direction 3 'of the film 3 in front of the first deflection roller 5. As a result, the film 3 forms a first U-shaped loop, in the base of which the first storage roller 5a is arranged.

Darüber hinaus weist die Vorrichtung eine zweite Speicherwalze 4a auf, um welche die Folie 3 in Transportrichtung 3' der Folie 3 hinter der zweiten Umlenkrolle 4 umgelenkt wird. Hierdurch bildet die Folie 3 eine zweite U-förmige Schleife, in deren Grund die zweite Speicherwalze 4a angeordnet ist.In addition, the device has a second storage roller 4a, around which the film 3 is deflected in the transport direction 3 'of the film 3 behind the second deflection roller 4. As a result, the film 3 forms a second U-shaped loop, in the base of the second storage roller 4a is arranged.

Die Speicherwalzen 4a, 5a sind auf einem Schlitten 8 angeordnet, welcher auf einer Linearführung 8a verschiebbar angeordnet ist. Hierdurch ist der zweite Pufferspeicher mit dem ersten Pufferspeicher zwangsgesteuert verbunden. Durch Verschieben des Schlittens 8 lassen sich die Tiefen der Schleifen verändern. Da die Speicherwalzen durch ihre Anordnung auf dem Schlitten 8 stets gemeinsam verschoben werden, verändern sich die Tiefen der Schleifen exakt proportional umgekehrt.The storage rollers 4a, 5a are arranged on a carriage 8, which is arranged displaceably on a linear guide 8a. As a result, the second buffer memory is forcibly connected to the first buffer memory. By moving the carriage 8, the depths of the loops can be changed. Since the storage rollers are always moved together by their arrangement on the carriage 8, the depths of the loops change in exactly the opposite direction.

Die Umlenkrollen 4, 5, 6, 7 und die Speicherwalzen 4a, 5a bestehen aus Metall. Dadurch haben sie einen geringen Reibwert, was sich sehr vorteilhaft beim Ausrichten der Materialbahn 3 quer zur Transportrichtung 3' auswirkt. Des Weiteren lassen sich die Umlenkrollen 4, 5, 6, 7 und die Speicherwalzen 4a, 5a sehr robust anordnen. Hierdurch erhält man einen steifen Aufbau im Bereich der Pufferspeicher, was sich ebenfalls sehr vorteilhaft auf die Laufgenauigkeit der Folie 3 auswirkt.The deflection rollers 4, 5, 6, 7 and the storage rollers 4a, 5a are made of metal. As a result, they have a low coefficient of friction, which has a very advantageous effect when aligning the material web 3 transversely to the transport direction 3 '. Furthermore, the deflection rollers 4, 5, 6, 7 and the storage rollers 4a, 5a can be arranged very robust. This gives a rigid structure in the buffer memory, which also has a very beneficial effect on the running accuracy of the film 3.

Da die Speicherwalzen 4a, 5a jeweils nach Art einer Tänzerwalze im Grund einer U-förmigen Schleife angeordnet sind, bilden sie mit den betreffenden Umlenkrollen 4, 5 jeweils einen Pufferspeicher. Je größer die Tiefe einer Schleife ist, desto mehr Folie ist in dem betreffenden Pufferspeicher angeordnet. Bei Verschieben des Schlittens 8 lässt sich somit der Inhalt der Pufferspeicher verändern. Das heißt, durch Verschieben des Schlittens 8 lässt sich der Inhalt der Pufferspeicher von dem einen Pufferspeicher in den anderen Pufferspeicher umschichten.Since the storage rollers 4a, 5a are each arranged in the manner of a dancer roller in the bottom of a U-shaped loop, they form with the respective deflection rollers 4, 5 each have a buffer memory. The greater the depth of a loop, the more Foil is placed in the respective buffer memory. When moving the carriage 8 can thus change the contents of the buffer memory. That is, by shifting the carriage 8, the contents of the buffer memories can be shifted from one buffer memory to the other buffer memory.

Somit lässt sich die Folie 3 um den zwischen den Markierungen 3a, 3b angeordneten nicht bedruckten Bereich entgegen ihrer Transportrichtung 3' bewegen, wenn der Schlitten 8 in der Figur von links nach rechts verstellt wird. Denn hierdurch verringert sich der Inhalt des zweiten Pufferspeichers wohingegen sich der Inhalt des ersten Pufferspeichers vergrößert. Um die Pufferspeicher möglichst klein auszubilden, was sich vorteilhaft auf die Genauigkeit auswirkt, sollte die Vorrichtung vorzugsweise so aufgebaut sein, dass der Weg zwischen den Markierungen 3a, 3b möglichst klein ist.Thus, the film 3 can be moved around the non-printed area arranged between the markings 3a, 3b, counter to its transport direction 3 ', when the carriage 8 is moved from left to right in the figure. Because this reduces the content of the second buffer memory whereas the content of the first buffer memory increases. In order to make the buffer memory as small as possible, which has an advantageous effect on the accuracy, the device should preferably be constructed so that the path between the markers 3a, 3b is as small as possible.

Zur Begrenzung des Verstellwegs des Schlittens 8 sind induktive Positionssensoren 9a, 9b vorgesehen. Statt der Positionssensoren 9a, 9b kann der Schlitten 8 jedoch auch mittels eines Servomotors 8b verstellt werden. Hierdurch lässt sich ebenfalls auf einfache Weise der Verstellweg des Schlittens 8 steuern.To limit the displacement of the carriage 8 inductive position sensors 9a, 9b are provided. However, instead of the position sensors 9a, 9b, the carriage 8 can also be adjusted by means of a servomotor 8b. As a result, the adjustment path of the carriage 8 can also be controlled in a simple manner.

Die dritte Umlenkrolle 6 ist als Drehgeber ausgebildet. Hierdurch lässt sich der zurückgelegte Weg der Folie 3 erfassen. Insbesondere lässt sich mittels des Drehgebers 6 der zurückgelegte Weg der Folie 3 bei der Umschichtung der Folie von einem Pufferspeicher in den anderen Pufferspeicher erfassen. Auch hierdurch lässt sich der Verstellweg des Schlittens 8 einstellen.The third deflection roller 6 is designed as a rotary encoder. As a result, the distance covered by the film 3 can be detected. In particular, by means of the rotary encoder 6, the distance traveled by the film 3 during the redeployment of the film can be detected by a buffer memory in the other buffer memory. This also allows the adjustment of the carriage 8 set.

Die Speicherwalzen 4a, 5a sind in einer solchen Höhe unterhalb der Umlenkrollen 4, 5 angeordnet, dass ihr Abstand zueinander der Dicke der Folie 3 entspricht, wenn sich die Speicherwalzen 4a, 5a und die Umlenkrollen 4, 5 gegenüber stehen. Hierdurch liegt der sich zwischen der ersten Speicherwalze 5a und der ersten Umlenkrolle 5 befindliche Schenkel der ersten Schleife in der selben Ebene, wie der sich zwischen der zweiten Speicherwalze 4a und der zweiten Umlenkrolle 4 befindliche Schenkel der zweiten Schleife.The storage rollers 4a, 5a are arranged at such a height below the deflection rollers 4, 5 that their distance from one another corresponds to the thickness of the film 3, when the storage rollers 4a, 5a and the deflection rollers 4, 5 are opposite. As a result, the leg of the first loop located between the first storage roller 5a and the first deflection roller 5 lies in the same Level, such as the located between the second storage roller 4a and the second guide roller 4 legs of the second loop.

Im Hinblick darauf, dass bei unterschiedlich dicken Folien 3 der Abstand der Speicherwalzen 4a, 5a von den Umlenkrollen 4, 5 verändert werden muss, kann der Abstand der Speicherwalzen 4a, 5a von den Umlenkrollen 4, 5 derart gewählt werden, dass er der Dicke der stärksten Folie entspricht, die mit der Vorrichtung bedruckt werden soll. Mit diesem Abstand werden dann auch dünnere Folien bedruckt. Selbstverständlich darf die Dicke der mit der Vorrichtung zu bedruckenden Folien nicht zu stark voneinander abweichen.With regard to the fact that with different thicknesses of foils 3, the distance between the storage rollers 4a, 5a must be changed by the guide rollers 4, 5, the distance between the storage rollers 4a, 5a of the guide rollers 4, 5 can be selected such that it the thickness of the strongest film to be printed with the device. With this distance then thinner films are printed. Of course, the thickness of the films to be printed with the device must not differ too much from each other.

In Transportrichtung 3' der Folie 3 ist zwischen der zweiten Umlenkwalze 4a und dem aus der Antriebswelle 12 und der Antriebsrolle12a bestehende Antrieb der Folie 3 eine aus einer Rolle 11a und einem Reibklotz 11b gebildete Klemmvorrichtung angeordnet. Durch die Klemmvorrichtung kann verhindert werden, dass sich der in Transportrichtung 3' der Folie 3 hinter der Klemmvorrichtung befindliche Teil der Folie 3 bewegt, wenn der Schlitten 8 verstellt wird.In the transport direction 3 'of the film 3, a clamping device formed by a roller 11a and a friction pad 11b is arranged between the second deflection roller 4a and the drive of the film 3 consisting of the drive shaft 12 and the drive roller 12a. By means of the clamping device, it is possible to prevent the part of the film 3 located behind the clamping device in the transporting direction 3 'of the film 3 from moving when the carriage 8 is adjusted.

Des Weiteren ist in Transportrichtung 3' der Folie 3 vor der ersten Speicherwalze 5a eine Spannvorrichtung angeordnet, mittels der die Folie 3 unter Spannung gehalten wird. Die Spannvorrichtung besteht aus einer Andruckrolle 10a und einem Gleichstromgenerator 10. Mittels des Gleichstromgenerators 10 lässt sich auf die Folie 3 ein Zug ausüben.Furthermore, in the transport direction 3 'of the film 3 in front of the first storage roller 5a, a tensioning device is arranged, by means of which the film 3 is held under tension. The tensioning device consists of a pressure roller 10a and a DC generator 10. By means of the DC generator 10 can be on the film 3 exercise a train.

Zwischen der Spannvorrichtung 10, 10a und der Abwickelrolle 13 ist eine Tänzerwalze 14 angeordnet. Durch die Tänzerwalze 14 lässt sich das Abwickeln der Folie 3 von der Abwicklerrolle 12 in bekannter Weise steuern.Between the tensioning device 10, 10a and the unwinding roller 13, a dancer roller 14 is arranged. By the dancer roller 14, the unwinding of the film 3 can be controlled by the unwinding roller 12 in a known manner.

Zur Vergrößerung der Pufferspeicher kann die Vorrichtung weitere Speicherwalzen 4a', 5a' aufweisen, welche oberhalb der Speicherwalzen 4a, 5a auf dem Schlitten 8 angeordnet sind. Mittels weiterer Umlenkrollen 4', 5' lassen sich somit zwei weitere Pufferspeicher ausbilden, welche dieselbe Kapazität haben, wie die bisher beschriebenen Pufferspeicher 4, 5. Die Elemente der zusätzlichen Pufferspeicher sowie der entsprechende Weg der Folie sind in der Figur gestrichelt dargestellt.To increase the buffer memory, the device may further storage rollers 4a ', 5a', which above the storage rollers 4a, 5a on the Carriage 8 are arranged. By means of further deflection rollers 4 ', 5' can thus form two more buffer memory, which have the same capacity as the previously described buffer memory 4, 5. The elements of the additional buffer memory and the corresponding path of the film are shown in dashed lines in the figure.

Claims (9)

  1. Device for printing on a web of material (3) transportable through the device in a direction of transport (3') wherein a colouring matter is applicable to the web of material (3) at least in a first station (1) and a further colouring matter is applicable to the web of material (3) and/or the colouring matter is fixable on the web of material (3) in at least one further station (2) and wherein at least one buffering section (5a) is arranged upstream of the first station (1) as viewed in the direction of transport (3') of the web of material (3),
    characterized in
    that at least one clamping device (11a, 11b) is provided to fix the web of material (3).
  2. Device according to Claim 1,
    characterized in
    that a second buffering section (4a) is provided downstream of the further station (2) as viewed in the direction of transport (3') of the web of material (3).
  3. Device according to Claim 2,
    characterized in
    that the second buffering section (4a) is positively connected to the first buffering section (5a).
  4. Device according to one of Claims 1 to 3,
    characterized in
    that the buffering section/s (4a, 5a) include/s a storage roller (4a, 5a; 4a', 5a') that the web of material (3) wraps around in the manner of what is known as a dancer roller.
  5. Device according to Claim 4,
    characterized in
    that the storage rollers (4a, 5a; 4a', 5a') are arranged on a slide (8).
  6. Device according to Claim 5,
    characterized in
    that the storage rollers (4a, 5a; 4a', 5a') are arranged in such a way that at least one leg (5b; 5b') of the loop formed by the first storage roller (5a; 5a') of the first buffering section (5a) is located in a plane in which the respective leg (4b; 4b') of the loop formed by the second storage roller (4a; 4a') of the second buffering section (4a) is likewise located.
  7. Device according to Claim 5 or 6,
    characterized in
    that sensors (9a, 9b) are provided respectively to detect an end position of the slide (8).
  8. Device according to one of Claims 5 to 7,
    characterized in
    that the slide (8) is drivable by a servomotor (8a).
  9. Device according to one of Claims 1 to 8,
    characterized in
    that a tensioning device (10, 10a) is provided by means of which the web of material (3) is maintainable under tensile stress at least in the region of the first station (1) and of the further station (2).
EP10717032.6A 2009-05-13 2010-04-29 Apparatus for printing a material web Not-in-force EP2429823B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200910021176 DE102009021176A1 (en) 2009-05-13 2009-05-13 Device for printing a material web
PCT/DE2010/000423 WO2010130237A1 (en) 2009-05-13 2010-04-29 Apparatus for printing a material web

Publications (2)

Publication Number Publication Date
EP2429823A1 EP2429823A1 (en) 2012-03-21
EP2429823B1 true EP2429823B1 (en) 2013-06-26

Family

ID=42351997

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10717032.6A Not-in-force EP2429823B1 (en) 2009-05-13 2010-04-29 Apparatus for printing a material web

Country Status (8)

Country Link
US (1) US9114641B2 (en)
EP (1) EP2429823B1 (en)
JP (1) JP5259015B2 (en)
CN (1) CN102438836B (en)
AU (1) AU2010246761A1 (en)
CA (1) CA2761787A1 (en)
DE (1) DE102009021176A1 (en)
WO (1) WO2010130237A1 (en)

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FR2969590A1 (en) * 2010-12-22 2012-06-29 Nipson Sas DOUBLE LOOP PAPER STORAGE SYSTEM
JP5746009B2 (en) * 2011-12-14 2015-07-08 株式会社ミヤコシ Digital printing method and apparatus
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CN106541691B (en) * 2017-01-16 2019-08-16 杭州中意自动化设备有限公司 A kind of cylinder press of interval work
CN108202525B (en) * 2018-03-07 2024-05-03 河北万杰机械科技股份有限公司 Automatic registering device of combined intermittent rotary printing and packaging machine

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JP2000007199A (en) * 1998-06-19 2000-01-11 Ykk Corp Long sized band treating device
DE19842585A1 (en) * 1998-09-17 2000-03-23 Armin Steuer Storage device and its use
JP4276364B2 (en) * 2000-08-18 2009-06-10 株式会社リコー Web printing device
DE10159937B4 (en) * 2001-12-06 2007-12-13 Man Roland Druckmaschinen Ag Retaining device for clamping a running in a web-fed printing press substrate
JP2004074642A (en) * 2002-08-20 2004-03-11 Komori Corp Rotary press
DE10311219A1 (en) * 2003-03-14 2004-09-30 Werner Kammann Maschinenfabrik Gmbh Method and device for printing on a web

Also Published As

Publication number Publication date
AU2010246761A1 (en) 2012-01-19
WO2010130237A1 (en) 2010-11-18
US9114641B2 (en) 2015-08-25
CN102438836A (en) 2012-05-02
CA2761787A1 (en) 2010-11-18
EP2429823A1 (en) 2012-03-21
US20120060709A1 (en) 2012-03-15
CN102438836B (en) 2015-03-11
JP2012526668A (en) 2012-11-01
JP5259015B2 (en) 2013-08-07
DE102009021176A1 (en) 2010-11-18

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