EP1000759B1 - Device for printing an endless foil having no marks - Google Patents

Device for printing an endless foil having no marks Download PDF

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Publication number
EP1000759B1
EP1000759B1 EP99121278A EP99121278A EP1000759B1 EP 1000759 B1 EP1000759 B1 EP 1000759B1 EP 99121278 A EP99121278 A EP 99121278A EP 99121278 A EP99121278 A EP 99121278A EP 1000759 B1 EP1000759 B1 EP 1000759B1
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EP
European Patent Office
Prior art keywords
endless foil
length
printing
endless
foil
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.)
Expired - Lifetime
Application number
EP99121278A
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German (de)
French (fr)
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EP1000759A2 (en
EP1000759A3 (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
Original Assignee
CSAT Gesellschaft fuer Computer Systeme and Automalions Technik mbH
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Publication of EP1000759A2 publication Critical patent/EP1000759A2/en
Publication of EP1000759A3 publication Critical patent/EP1000759A3/en
Application granted granted Critical
Publication of EP1000759B1 publication Critical patent/EP1000759B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00Devices 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
    • B41J11/36Blanking or long feeds; Feeding to a particular line, e.g. by rotation of platen or feed roller
    • B41J11/42Controlling printing material conveyance for accurate alignment of the printing material with the printhead; Print registering
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J15/00Devices 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
    • B41J15/16Means for tensioning or winding the web

Definitions

  • the invention relates to a device according to the preamble of claim 1 for Printing a label-free continuous foil with printed images, which within a portion of a predetermined length are arranged by means of a printing device, through which the continuous film continuously, if necessary, even without Printing process is transported, the endless film after printing thereby is divided into the sections of the predetermined length, that the endless film a Transport element, is fed, which the endless film in each case by the predetermined Length further transported, wherein the printed images in each case with respect to Boundaries between two consecutive sections of the predetermined length must be accurately positioned on the continuous film and the printing device for performing a printing operation comprising only a single print image is activated each time by means of an output signal of a sensor when the Length of the endless film between the last made by the division generated section boundary and the printing device a predetermined multiple of the second predetermined length, and an arrangement for buffering the endless film is provided.
  • Such a device is known for example from DE 195 25 713 C1.
  • the known device is preferably used when so-called Blister packaging in which, for example, tablets are located accurately be provided with a printed image.
  • the tablets are regularly in pockets made of plastic or out Paper existing thermoforming foil, which are sealed by a cover sheet.
  • a cover sheet On the cover sheet is a printed image, which regularly provides information about the tablets contains, for example, data on the use of each tablet. It is therefore crucial that these details correspond to the position the tablets or bags are applied to the cover sheet.
  • Offset between the thermoforming sheet and the cover sheet should be minimal or if possible, there should be no noticeable offset.
  • the cover sheet can already with a high accuracy be applied to the thermoforming sheet. This is essentially achieved ensures that the beginning of a section of the film to be printed always is set again. By constantly redefining the beginning of one too printing section, any existing error can not add up. Because of the suppressed accumulation are even relatively large deviations usually harmless, since the existing at a bleed deviation no Has influence on the beginning of the next section to be printed. Similarly slippage of the film does not affect.
  • the known device is particularly advantageous when the device printed sections are taken discontinuously. Because that's the printing device for performing a printing operation comprising only a single print image activating signal is always generated by means of a sensor when a dancer roller is in a certain position. By the discontinuous Removal of the printed film, the dancer roller performs a lifting movement, whereby the position of the dancer roll constantly changes noticeably, which is why it is used for Generation of a length-dependent signal is very well suited.
  • the known device is for controlling the speed of the printing device arranged a ramp-shaped proximity sensor in the dancer roller.
  • the proximity sensor is designed or arranged such that the distance of the dancer roll to the proximity sensor in the course of the movement the dancer roll continuously changed over an active area. This gives the proximity sensor depending on the position of the dancer roller or the Removal of the dancer roller from the ramp of the sensor a corresponding signal out. This signal is used to control the speed of the printing device used.
  • the sensor output is averaged such that the controller the drive of the printing device is made insensitive. This follows the Although the speed of the printing device is no longer directly dependent on the sensor output signal, However, the drive of the printing device still leads relatively large Speed changes through. This adversely affects the operation of the known device.
  • At least one first encoder which in an advantageous manner a rotary encoder is arranged at the output of the buffer arrangement, by means of which in each case the length of the path of the further transport of the endless film is detected, wherein the average speed with which the endless film is transported, determined and to adjust the speed with which the endless film through the printing device is transported, is used.
  • the first encoder at the output of the buffer assembly can be in a very simple way, for example, in a separate computer unit very accurately determine the average speed with which the inventive Shen Device film is removed. Corresponds to the speed with which the Endless film is transported by the printing device, the average speed determined the buffer assembly is fed as much endless foil, as shown on the average by the discontinuous removal of foil from the device is removed. The length of the endless film contained in the buffer assembly therefore shuttles around a certain mean.
  • the constant speed at which the endless film is transported through the printing unit will affect the picture quality as well as the positioning very favorable of the printed image. Furthermore, the constant drive of the printing device has an effect very beneficial to the reliability of the printing device. About that In addition, increases the lifetime by the constant drive of the printing device the printing device.
  • the buffer arrangement a dancer roller which is movably arranged such that the position of the dancer roller of the length of the endless film between the through the most recent division generated section boundary and the Pressure device depends, wherein the sensor detects the position of the dancer roller.
  • the dancer roller is in a loop of endless foil, which by a Deflection of the endless film around the dancer roller is generated. Shortens the length the endless film in the buffer assembly, the dancer roller is in the direction Loop opening moves. As the length of the continuous film increases, it moves the dancer roll away from the opening of the loop, eliminating the path of continuous film is enlarged by the dancer roller.
  • the dancer roller is on the one hand in a very simple way, the buffer arrangement realized, and on the other created an element, by means of which on very In a simple way, the length of the endless foil in the buffer arrangement can be detected can.
  • the sensor is advantageously an optical sensor and arranged so that it is located in the middle of the running of the dancer roller lifting movement. In principle, the dancer roller oscillates in both directions with a constant amplitude past the sensor.
  • an offset roller is provided, by means of the length of the endless film between the last made by the last Division generated section boundary and the printing device and thus the position of the dancer roller can be changed. This is especially true advantageous if the format of the printed image or to be printed Section changes, as this will change the length of the slide between the through the last division made produced section boundary and printing device must be changed.
  • the Offset roller shifted so far that the length of the last section boundary and the printing device located film in turn a predetermined Multiples of the second, now changed, predetermined length corresponds, when the dancer roller is opposite the sensor. This will avoided that the position of the printer must be changed when the Section length changes.
  • a second encoder which is advantageously a rotary encoder, on Input of the buffer arrangement is arranged, by means of which the length of the path the further transport of the endless film is detected, wherein the transport speed the endless film is detected and for constant regulation of the speed, with which the endless film is transported by the printing device used becomes.
  • the output signal of the second encoder corresponds to the actual value the speed at which the endless film is transported through the printing device becomes. Does this actual value differ from that by the first rotary encoder or From a computer unit predetermined setpoint, the speed readjusted the printing device in a known manner.
  • the regulation of speed affects very much the picture quality and the accuracy of the inventive device.
  • the difference in length between the endless foil introduced into the buffer arrangement and that of the buffer arrangement to remove the removed foil.
  • a computing unit is expediently provided by means of which the difference of the output signals of Encoder is formed. This difference can be used for correction in an advantageous manner the activation of the printing process are used, as with another particular embodiment of the invention is provided.
  • the sole figure shows a schematic arrangement of an inventive Printing device.
  • a printing device In a printing device according to the invention is an endless film to be printed 1, which is unwound from a roll 8, guided by a printing device 2. Behind the printing device 2, the endless foil 1, which regularly off Aluminum consists of one of a dancer roller 6 and an offset roller 11 existing Buffer arrangement supplied. At the output of the buffer arrangement is a first Guide roller 15, a second guide roller 17 is arranged at the entrance of the buffer assembly. The endless foil 1 is first after leaving the printing device 2 the second guide roller 17 is deflected. Wraps around behind the second guide roller 17 the endless film 1 S-shaped the dancer roller 6 and the offset roller 11. The dancer roller 6 and the offset roller 11 are respectively in the bottom of loops, which are formed by the course of the endless foil 1. Behind the offset roller 11, the endless foil 1 is deflected around the first deflection roller 15.
  • the sampler 10 is a conventional one Device which repeatedly receives a part of the film and through a pendulum movement pulls out of the device according to the invention.
  • the separator 4 may be formed such that it cuts the endless foil 1.
  • the dancer roller 6 and the offset roller 11 are arranged so as to be against each other can be moved to and away from each other. While the offset roller 11 can be determined, the dancer roller 6 is free to move.
  • the dancer roller 6 and the Offsetwalze 11 thus form the arrangement for buffering the endless film 1.
  • the length of the endless film 1 between the separator and the printing device 2 are set. This is required when the predetermined length L of the sections changes.
  • the first guide roller 15 is connected to a first rotary encoder 5. At the exit of the first encoder 5 appears a signal which is proportional to that of the first Deflection pulley 15 performed rotary motion.
  • the second guide roller 17 is connected to a second rotary encoder 7. At the output of the second encoder. 7 appears a signal which is proportional to that of the second guide roller 17th performed rotational movement is.
  • an optical sensor 3 is arranged such that the always occurs at its output 3a signal occurs then a signal change, when the length of the endless film 1 between the separator T and the printing device 2 corresponds to a predetermined multiple of the predetermined length L.
  • the device according to the invention is film 1 with taken from a speed which is a multiple of the speed, with which the film 1 passes the printer 2.
  • the device of the invention more foil 1 is removed than is transported by the printer 2, shortens the length of the film 1 between the separator 4 and the Drukker 2. By shortening the length of the dancer roller 6 is moved upward.
  • a signal to the input 2a of the printer 2 the length of the film 1 is between the separator 4 and the beginning of a section to be printed Place the film 1, for example, ten times the length of a to be printed Section. Since the printer 2 at the moment a signal for printing receives the print image at the very beginning of a section to be printed set. It will be understood that, if dependent on the printer type, a route is taken into account must be, for example, corresponds to the part of the circumference of an image roller, between the writing of the image roller and the imprint of the Image roller is located on the film 1, this part by a corresponding offset compensation must be taken into account.
  • the output of the second rotary encoder 7, the output of the first rotary encoder 5 and the output 3a of the sensor 3 are connected to the arithmetic unit 12, which on the one hand, the mean value of the output from the first encoder 5 signal and on the other hand, the difference between the output signals of the two Encoder 5, 7 forms.
  • a first output of the arithmetic unit 12 is provided with a delay element 13 connected.
  • the output of the delay element 13 is connected to a Input 2a of the printing device 2 connected to activate the printing process.
  • the delay element 13 the signal activating the printing process be delayed so that the distance of the print image to the beginning of a to be printed Section can be adjusted.
  • a second output of the arithmetic unit 12 is connected to a further input 2b of Printing device 2, which is used to control the speed at which the endless film 1 is transported by the printing device 2, is provided connected. That of the control unit 12 to the further input 2b of the printing device. 2 output signal corresponds to the mean value of the output from the first encoder 5 Signal. This corresponds to the speed at which the endless foil 1 transported by the printing device 2, exactly the mean value of the speed, with the removal device 10 of the device according to the invention Slide 1 takes.
  • the output from the second encoder 7 signal the actual value of the speed corresponds is transported by the endless film 1 by the printing device 2,
  • the signal from the arithmetic unit 12 for constant speed control the printing device 2 can be used.
  • the difference formed by the arithmetic unit 12 of the output signals of the two 5, 7 provides a measure of the length of the buffer assembly Endless film 1.
  • the lifting movement of the dancer roller 6 to the sensor 3 is equal in both directions, the length of which must be in the buffer arrangement located endless foil 1 have a certain amount. Since it is very advantageous to the accuracy of the positioning of the printed image on the endless foil 1 affects when the lifting movement of the dancer roller 6 to the sensor 3 in both Directions is equal, is by means of the arithmetic unit 12 to the other Input 2b of the printing unit 2 output signal so influenced that the length of in the buffer assembly endless film 1 the predetermined amount equivalent.
  • the device according to the invention becomes discontinuous Endless film 1 removed.
  • the rotary encoder 5 are therefore correspondingly Impulse groups off.
  • the pulse groups are fed to the arithmetic unit 12, which from this forms an average.
  • the mean value is sent to the further input 2b the printing device 2 passed, whereby the transport speed of the printing unit 2 corresponds to the average speed with which the removal device 10 of the device according to the invention takes film 1.
  • the arithmetic unit 12 increases that to the other terminal 2b of the printing unit 2 output signal, so that the buffer assembly again as much endless foil 1 is supplied, as you taken on average by the removal device 10 becomes.
  • the sensor 3 is arranged to be in the center of the running of the dancer roller 6 stroke movement is located. hereby is the respective distance of the dancer roller 6 at the reversal point of their movement to Sensor 3 the same size.
  • the buffer arrangement for example, due to a fault fed more continuous film than it is removed, the center shifts, around which the dancer roller 6 commutes, down. The sensor 3 is located thus no longer in this center.
  • the of the arithmetic unit 12 formed difference of the output signals of the two encoders 5, 7 changed. According to the change, the arithmetic unit 12 corrects the output to the other input 2b of the printing unit 2 signal such that the original difference is restored, that is, the sensor 3 is again in the middle of the performed by the dancer roller 6 stroke movement.
  • the sensor 3 used in the described embodiment also is an optical sensor, so could instead a so-called electronic Scale can be used. Instead of a signal change would have the arithmetic unit 12th then evaluate a certain length measure given by the scale. through an electronic scale could be advantageously a mechanical Avoid adjustment of the sensor 3, as the adjustment is due to a change of the Scale output length measure or the calculation made could be made. This could also on Offsetwalze 11 be omitted, since caused by the offset roller 11 change in length the endless film 1 could also be considered by the arithmetic unit 12.

Abstract

Device has transmission device (5) arranged at output of buffer arrangement (6,11) to determine lengths of paths of onward transport of endless sheet (1). Average speed of onward transport of sheet is determined and used to set speed for the transport of sheet through print unit (2). Sensor (3) detects position of roller (6).

Description

Die Erfindung betrifft eine Vorrichtung gemäß dem Oberbegriff des Anspruchs 1 zum Bedrucken einer markierungsfreien Endlosfolie mit Druckbildern, welche innerhalb eines Abschnitts einer vorbestimmten Länge angeordnet sind, mittels einer Druckeinrichtung, durch welche die Endlosfolie kontinuierlich gegebenenfalls auch ohne Druckvorgang transportiert wird, wobei die Endlosfolie nach dem Bedrucken dadurch in die Abschnitte der vorbestimmten Länge aufgeteilt wird, daß die Endlosfolie einem Transportelement, zugeführt wird, welches die Endlosfolie jeweils um die vorbestimmte Länge weitertransportiert, wobei die Druckbilder jeweils in Bezug auf die Grenzen zwischen zwei aufeinanderfolgenden Abschnitten der vorbestimmten Länge positionsgenau auf die Endlosfolie aufgebracht sein müssen und die Druckeinrichtung zum Durchführen eines nur ein einziges Druckbild umfassenden Druckvorgangs jedesmal dann mittels eines Ausgangssignals eines Sensors aktiviert wird, wenn die Länge der Endlosfolie zwischen der durch die jeweils letzte vorgenommene Aufteilung erzeugte Abschnittsgrenze und der Druckeinrichtung ein vorbestimmtes Vielfaches der zweiten vorbestimmten Länge beträgt, und eine Anordnung zum Puffern der Endlosfolie vorgesehen ist. The invention relates to a device according to the preamble of claim 1 for Printing a label-free continuous foil with printed images, which within a portion of a predetermined length are arranged by means of a printing device, through which the continuous film continuously, if necessary, even without Printing process is transported, the endless film after printing thereby is divided into the sections of the predetermined length, that the endless film a Transport element, is fed, which the endless film in each case by the predetermined Length further transported, wherein the printed images in each case with respect to Boundaries between two consecutive sections of the predetermined length must be accurately positioned on the continuous film and the printing device for performing a printing operation comprising only a single print image is activated each time by means of an output signal of a sensor when the Length of the endless film between the last made by the division generated section boundary and the printing device a predetermined multiple of the second predetermined length, and an arrangement for buffering the endless film is provided.

Eine derartige Vorrichtung ist beispielsweise aus der DE 195 25 713 C1 bekannt. Die bekannte Vorrichtung wird vorzugsweise dann verwendet, wenn sogenannte Blisterverpackungen, in der sich beispielsweise Tabletten befinden, positionsgenau mit einem Druckbild versehen werden.Such a device is known for example from DE 195 25 713 C1. The known device is preferably used when so-called Blister packaging in which, for example, tablets are located accurately be provided with a printed image.

Die Tabletten befinden sich regelmäßig in Taschen einer aus Kunststoff oder aus Papier bestehenden Tiefziehfolie, welche mittels einer Deckfolie versiegelt sind. Auf der Deckfolie befindet sich ein Druckbild, welches regelmäßig Angaben über die Tabletten enthält, wie beispielsweise Daten über die Anwendung der einzelnen Tabletten. Es ist daher entscheidend, daß diese Angaben entsprechend der Position der Tabletten beziehungsweise Taschen auf der Deckfolie aufgebracht sind. Der Versatz zwischen der Tiefziehfolie und der Deckfolie soll minimal sein beziehungsweise es soll möglichst kein merkbarer Versatz vorhanden sein.The tablets are regularly in pockets made of plastic or out Paper existing thermoforming foil, which are sealed by a cover sheet. On the cover sheet is a printed image, which regularly provides information about the tablets contains, for example, data on the use of each tablet. It is therefore crucial that these details correspond to the position the tablets or bags are applied to the cover sheet. Of the Offset between the thermoforming sheet and the cover sheet should be minimal or if possible, there should be no noticeable offset.

Mittels der bekannten Vorrichtung kann die Deckfolie bereits mit einer hohen Genauigkeit auf die Tiefziehfolie aufgebracht werden. Dies wird im wesentlichen dadurch erreicht, daß der Anfang eines zu bedruckenden Abschnitts der Folie stets aufs neue festgelegt wird. Durch die ständig neue Festlegung des Anfangs eines zu bedruckenden Abschnitts kann sich ein eventuell vorhandener Fehler nicht addieren. Wegen der unterbundenen Akkumulierung sind selbst relativ große Abweichungen in der Regel unschädlich, da die bei einem Anschnitt vorhandene Abweichung keinen Einfluß auf den Anfang des nächsten zu bedruckenden Abschnitts hat. Desgleichen wirkt sich ein Schlupf der Folie nicht aus.By means of the known device, the cover sheet can already with a high accuracy be applied to the thermoforming sheet. This is essentially achieved ensures that the beginning of a section of the film to be printed always is set again. By constantly redefining the beginning of one too printing section, any existing error can not add up. Because of the suppressed accumulation are even relatively large deviations usually harmless, since the existing at a bleed deviation no Has influence on the beginning of the next section to be printed. Similarly slippage of the film does not affect.

Die bekannte Vorrichtung ist insbesondere dann vorteilhaft, wenn der Vorrichtung bedruckte Abschnitte diskontinuierlich entnommen werden. Denn das die Druckeinrichtung zur Durchführung eines nur ein einziges Druckbild umfassenden Druckvorgangs aktivierende Signal wird mittels eines Sensors immer dann erzeugt, wenn sich eine Tänzerwalze in einer bestimmten Position befindet. Durch die diskontinuierliche Entnahme der bedruckten Folie führt die Tänzerwalze eine Hubbewegung aus, wodurch sich die Lage der Tänzerwalze dauernd merklich verändert, weshalb sie zur Erzeugung eines längenabhängigen Signals sehr gut geeignet ist. The known device is particularly advantageous when the device printed sections are taken discontinuously. Because that's the printing device for performing a printing operation comprising only a single print image activating signal is always generated by means of a sensor when a dancer roller is in a certain position. By the discontinuous Removal of the printed film, the dancer roller performs a lifting movement, whereby the position of the dancer roll constantly changes noticeably, which is why it is used for Generation of a length-dependent signal is very well suited.

Bei der bekannten Vorrichtung ist zur Regelung der Geschwindigkeit der Druckvorrichtung ein rampenförmiger Näherungssensor im Bereich der Tänzerwalze angeordnet. Der Näherungssensor ist so ausgebildet, beziehungsweise angeordnet, daß sich der Abstand der Tänzerwalze zum Näherungssensor im Verlauf der Bewegung der Tänzerwalze über einen aktiven Bereich stetig verändert. Hierdurch gibt der Näherungssensor in Abhängigkeit der Position der Tänzerwalze beziehungsweise der Entfernung der Tänzerwalze von der Rampe des Sensors ein entsprechendes Signal aus. Dieses Signal wird zur Steuerung der Geschwindigkeit der Druckeinrichtung verwendet.In the known device is for controlling the speed of the printing device arranged a ramp-shaped proximity sensor in the dancer roller. The proximity sensor is designed or arranged such that the distance of the dancer roll to the proximity sensor in the course of the movement the dancer roll continuously changed over an active area. This gives the proximity sensor depending on the position of the dancer roller or the Removal of the dancer roller from the ramp of the sensor a corresponding signal out. This signal is used to control the speed of the printing device used.

Durch die diskontinuierliche Entnahme von Folien aus der bekannten Vorrichtung ist die Tänzerwalze ständig in Bewegung. Hierdurch verändert sich das Ausgangssignal des Sensors entsprechend.By the discontinuous removal of films from the known device is the dancer roller constantly in motion. This changes the output signal of the sensor accordingly.

Um zu verhindern, daß der Antrieb der Druckeinrichtung entsprechend des Ausgangssignals des Sensors ständig seine Geschwindigkeit ändert, ist bei der bekannten Vorrichtung vorgesehen, daß der Mittelwert des Sensor-Ausgangssignals gebildet wird. Darüber, wie der Mittelwert gebildet wird, können der genannten Druckschrift jedoch keine Angaben entnommen werden.To prevent the drive of the printing device according to the output signal the sensor constantly changes its speed, is in the known Device provided that the mean value of the sensor output signal is formed. About how the mean is formed, may be mentioned However, no information is taken from the publication.

In der Praxis wird das Sensor-Ausgangssignal derart gemittelt, daß die Steuerung des Antriebs der Druckeinrichtung unempfindlich gemacht wird. Hierdurch folgt die Geschwindigkeit der Druckeinrichtung zwar nicht mehr direkt dem Sensor-Ausgangssignal, jedoch führt der Antrieb der Druckeinrichtung noch relativ große Geschwindigkeitsänderungen durch. Dies wirkt sich nachteilig auf den Betrieb der bekannten Vorrichtung aus.In practice, the sensor output is averaged such that the controller the drive of the printing device is made insensitive. This follows the Although the speed of the printing device is no longer directly dependent on the sensor output signal, However, the drive of the printing device still leads relatively large Speed changes through. This adversely affects the operation of the known device.

Es ist Aufgabe der Erfindung eine eingangs genannte Vorrichtung derart auszubilden, daß der Antrieb der Druckeinrichtung mit relativ konstanter Geschwindigkeit läuft. It is an object of the invention to form a device mentioned at the outset in such a way that that the drive of the printing device at a relatively constant speed running.

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 to this problem arises from the features of the characterizing Part of claim 1. Advantageous developments of the invention will become apparent the dependent claims.

Gemäß der Erfindung ist wenigstens ein erster Geber, welcher in vorteilhafter Weise ein Drehgeber ist, am Ausgang der Pufferanordnung angeordnet, mittels welchem jeweils die Länge des Wegs des Weitertransports der Endlosfolie erfaßt wird, wobei die Durchschnittsgeschwindigkeit, mit der die Endlosfolie weitertransportiert wird, festgestellt und zur Einstellung der Geschwindigkeit, mit der die Endlosfolie durch die Druckeinrichtung transportiert wird, verwendet wird.According to the invention, at least one first encoder, which in an advantageous manner a rotary encoder is arranged at the output of the buffer arrangement, by means of which in each case the length of the path of the further transport of the endless film is detected, wherein the average speed with which the endless film is transported, determined and to adjust the speed with which the endless film through the printing device is transported, is used.

Durch die Verwendung des ersten Drehgebers am Ausgang der Pufferanordnung läßt sich auf sehr einfache Weise beispielsweise in einer separaten Rechnereinheit sehr genau die Durchschnittsgeschwindigkeit ermitteln, mit der der erfindungsgemä-ßen Vorrichtung Folie entnommen wird. Entspricht die Geschwindigkeit, mit der die Endlosfolie durch die Druckeinrichtung transportiert wird, der ermittelten Durchschnittsgeschwindigkeit, wird der Pufferanordnung genau soviel Endlosfolie zugeführt, wie ihr im Mittel durch die diskontinuierliche Entnahme von Folie aus der Vorrichtung entnommen wird. Die Länge der in der Pufferanordnung enthaltenen Endlosfolie pendelt daher um einen bestimmten Mittelwert.By using the first encoder at the output of the buffer assembly can be in a very simple way, for example, in a separate computer unit very accurately determine the average speed with which the inventive Shen Device film is removed. Corresponds to the speed with which the Endless film is transported by the printing device, the average speed determined the buffer assembly is fed as much endless foil, as shown on the average by the discontinuous removal of foil from the device is removed. The length of the endless film contained in the buffer assembly therefore shuttles around a certain mean.

Die konstante Geschwindigkeit, mit der die Endlosfolie durch die Druckeinheit transportiert wird, wirkt sich sehr günstig auf die die Bildqualität sowie die Positionierung des Druckbildes aus. Des weiteren wirkt sich der konstante Antrieb der Druckeinrichtung sehr vorteilhaft auf die Zuverlässigkeit der Druckeinrichtung aus. Darüber hinaus erhöht sich durch den konstanten Antrieb der Druckeinrichtung die Lebensdauer der Druckeinrichtung.The constant speed at which the endless film is transported through the printing unit will affect the picture quality as well as the positioning very favorable of the printed image. Furthermore, the constant drive of the printing device has an effect very beneficial to the reliability of the printing device. About that In addition, increases the lifetime by the constant drive of the printing device the printing device.

Bei einer besonderen Ausführungsform der Erfindung ist vorgesehen, daß die Pufferanordnung eine Tänzerwalze aufweist, welche beweglich derart angeordnet ist, daß die Position der Tänzerwalze von der Länge der Endlosfolie zwischen der durch die jeweils letzte vorgenommene Aufteilung erzeugten Abschnittsgrenze und der Druckeinrichtung abhängt, wobei der Sensor die Position der Tänzerwalze detektiert. In a particular embodiment of the invention it is provided that the buffer arrangement a dancer roller which is movably arranged such that the position of the dancer roller of the length of the endless film between the through the most recent division generated section boundary and the Pressure device depends, wherein the sensor detects the position of the dancer roller.

Die Tänzerwalze befindet sich in einer Schlaufe der Endlosfolie, welche durch eine Umlenkung der Endlosfolie um die Tänzerwalze erzeugt wird. Verkürzt sich die Länge der Endlosfolie in der Pufferanordnung, wird die Tänzerwalze in Richtung Schlaufenöffnung bewegt. Vergrößert sich die Länge der Endlosfolie, bewegt sich die Tänzerwalze von der Öffnung der Schlaufe weg, wodurch der Weg der Endlosfolie um die Tänzerwalze vergrößert ist.The dancer roller is in a loop of endless foil, which by a Deflection of the endless film around the dancer roller is generated. Shortens the length the endless film in the buffer assembly, the dancer roller is in the direction Loop opening moves. As the length of the continuous film increases, it moves the dancer roll away from the opening of the loop, eliminating the path of continuous film is enlarged by the dancer roller.

Durch die Tänzerwalze wird zum einen auf sehr einfache Weise die Pufferanordnung realisiert, und zum anderen ein Element geschaffen, mittels welchem auf sehr einfache Weise die Länge der Endlosfolie in der Pufferanordnung detektiert werden kann. Der Sensor ist in vorteilhafter Weise ein optischer Sensor und so angeordnet, daß er sich in der Mitte der von der Tänzerwalze ausgeführten Hubbewegung befindet. Die Tänzerwalze pendelt im Prinzip mit konstanter Amplitude in beide Richtungen am Sensor vorbei.By the dancer roller is on the one hand in a very simple way, the buffer arrangement realized, and on the other created an element, by means of which on very In a simple way, the length of the endless foil in the buffer arrangement can be detected can. The sensor is advantageously an optical sensor and arranged so that it is located in the middle of the running of the dancer roller lifting movement. In principle, the dancer roller oscillates in both directions with a constant amplitude past the sensor.

Bei einer weiteren Ausführungsform der Erfindung ist eine Offset-Walze vorgesehen, mittels der die Länge der Endlosfolie zwischen der durch die jeweils letzte vorgenommene Aufteilung erzeugten Abschnittsgrenze und der Druckeinrichtung und somit die Position der Tänzerwalze verändert werden kann. Dies ist besonders dann von Vorteil, wenn sich das Format des Druckbildes beziehungsweise des zu bedrukkenden Abschnitts ändert, da hierdurch die Länge der Folie zwischen der durch die letzte vorgenommene Aufteilung erzeugten Abschnittsgrenze und der Druckeinrichtung verändert werden muß.In a further embodiment of the invention, an offset roller is provided, by means of the length of the endless film between the last made by the last Division generated section boundary and the printing device and thus the position of the dancer roller can be changed. This is especially true advantageous if the format of the printed image or to be printed Section changes, as this will change the length of the slide between the through the last division made produced section boundary and printing device must be changed.

Um die mittlere Position der Tänzerwalze trotz der veränderten Länge zwischen der letzten Abschnittsgrenze und der Druckeinrichtung unverändert zu lassen, wird die Offset-Walze soweit verschoben, daß die Länge der sich zwischen der letzten Abschnittsgrenze und der Druckeinrichtung befindlichen Folie wiederum einem vorbestimmten Vielfachen der zweiten, nunmehr geänderten, vorbestimmten Länge entspricht, wenn sich die Tänzerwalze gegenüber dem Sensor befindet. Hierdurch wird vermieden, daß die Position des Druckers verändert werden muß, wenn sich die Abschnittslänge ändert. To the middle position of the dancer roller despite the changed length between the Last section boundary and the printing device to leave unchanged, the Offset roller shifted so far that the length of the last section boundary and the printing device located film in turn a predetermined Multiples of the second, now changed, predetermined length corresponds, when the dancer roller is opposite the sensor. This will avoided that the position of the printer must be changed when the Section length changes.

Als besonders vorteilhaft hat sich eine Ausführungsform der Erfindung herausgestellt, bei der ein zweiter Geber, welcher in vorteilhafter Weise ein Drehgeber ist, am Eingang der Pufferanordnung angeordnet ist, mittels welchem die Länge des Weges des Weitertransports der Endlosfolie erfaßt wird, wobei die Transportgeschwindigkeit der Endlosfolie festgestellt wird und zur Konstantregelung der Geschwindigkeit, mit der die Endlosfolie durch die Druckeinrichtung transportiert wird, verwendet wird.Particularly advantageous is an embodiment of the invention has been found, in which a second encoder, which is advantageously a rotary encoder, on Input of the buffer arrangement is arranged, by means of which the length of the path the further transport of the endless film is detected, wherein the transport speed the endless film is detected and for constant regulation of the speed, with which the endless film is transported by the printing device used becomes.

Da die Geschwindigkeit, mit der die Endlosfolie in die Pufferanordnung eingeleitet wird, der Geschwindigkeit entspricht, mit der die Endlosfolie durch die Druckeinheit transportiert wird, entspricht das Ausgangssignal des zweiten Drehgebers dem Istwert der Geschwindigkeit, mit der die Endlosfolie durch die Druckeinrichtung transportiert wird. Weicht dieser Istwert von dem durch den ersten Drehgeber beziehungsweise einer Rechnereinheit vorgegebenen Sollwert ab, wird die Geschwindigkeit der Druckeinrichtung auf bekannte Weise nachgeregelt. Die Regelung der Geschwindigkeit wirkt sich sehr vorteilhaft auf die Bildqualität sowie die Genauigkeit der erfindungsgemäßen Vorrichtung aus.As the speed at which the endless film is introduced into the buffer assembly is equal to the speed at which the continuous film through the printing unit is transported, the output signal of the second encoder corresponds to the actual value the speed at which the endless film is transported through the printing device becomes. Does this actual value differ from that by the first rotary encoder or From a computer unit predetermined setpoint, the speed readjusted the printing device in a known manner. The regulation of speed affects very much the picture quality and the accuracy of the inventive device.

Mittels des zweiten Drehgebers ist es darüber hinaus möglich, die Längendifferenz zwischen der in die Pufferanordnung eingeleiteten Endlosfolie und der der Pufferanordnung entnommenen Folie zu bilden. Hierfür ist in zweckmäßiger Weise eine Recheneinheit vorgesehen, mittels welcher die Differenz der Ausgangssignale der Drehgeber gebildet wird. Diese Differenz kann in vorteilhafter Weise zur Korrektur der Aktivierung des Druckvorgangs verwendet werden, wie dies bei einer weiteren besonderen Ausführungsform der Erfindung vorgesehen ist.By means of the second encoder, it is also possible, the difference in length between the endless foil introduced into the buffer arrangement and that of the buffer arrangement to remove the removed foil. For this purpose, a computing unit is expediently provided by means of which the difference of the output signals of Encoder is formed. This difference can be used for correction in an advantageous manner the activation of the printing process are used, as with another particular embodiment of the invention is provided.

Durch die Korrektur der Aktivierung des Druckvorgangs besteht in vorteilhafter Weise die Möglichkeit, den Druckvorgang abweichend vom Auftreten des Ausgangssignals des Sensors zu starten. Hierdurch besteht die Möglichkeit, den Druckvorgang an ein geändertes Längenformat der zu bedruckenden Abschnitte anzupassen, ohne daß die Offset-Walze verschoben wird. Der Druckvorgang wird entsprechend der Längenänderung der zu bedruckenden Abschnitte später gestartet. Hierdurch kann auf die Offset-Walze verzichtet werden. By correcting the activation of the printing process exists in an advantageous manner the possibility of printing deviating from the appearance of the output signal to start the sensor. This gives you the option of printing to adapt to a changed length format of the sections to be printed, without the offset roller being moved. The printing will be done accordingly the change in length of the sections to be printed later started. hereby can be dispensed with the offset roller.

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 result from the following description of a particular embodiment with reference to the drawing.

Es zeigt die einzige Figur eine schematische Anordnung einer erfindungsgemäßen Druckvorrichtung.The sole figure shows a schematic arrangement of an inventive Printing device.

Bei einer erfindungsgemäßen Druckvorrichtung wird eine zu bedruckende Endlosfolie 1, welche von einer Rolle 8 abgewickelt wird, durch eine Druckeinrichtung 2 geführt. Hinter der Druckeinrichtung 2 wird die Endlosfolie 1, welche regelmäßig aus Aluminium besteht, einer aus einer Tänzerwalze 6 und einer Offsetwalze 11 bestehenden Pufferanordnung zugeführt. Am Ausgang der Pufferanordnung ist eine erste Umlenkrolle 15, am Eingang der Pufferanordnung eine zweite Umlenkrolle 17 angeordnet. Die Endlosfolie 1 wird nach Verlassen der Druckeinrichtung 2 zunächst um die zweite Umlenkrolle 17 umgelenkt. Hinter der zweiten Umlenkrolle 17 umschlingt die Endlosfolie 1 S-förmig die Tänzerwalze 6 sowie die Offsetwalze 11. Die Tänzerwalze 6 sowie die Offsetwalze 11 befinden sich jeweils im Grund von Schlaufen, welche durch den Verlauf der Endlosfolie 1 gebildet werden. Hinter der Offsetwalze 11 wird die Endlosfolie 1 um die erste Umlenkrolle 15 umgelenkt.In a printing device according to the invention is an endless film to be printed 1, which is unwound from a roll 8, guided by a printing device 2. Behind the printing device 2, the endless foil 1, which regularly off Aluminum consists of one of a dancer roller 6 and an offset roller 11 existing Buffer arrangement supplied. At the output of the buffer arrangement is a first Guide roller 15, a second guide roller 17 is arranged at the entrance of the buffer assembly. The endless foil 1 is first after leaving the printing device 2 the second guide roller 17 is deflected. Wraps around behind the second guide roller 17 the endless film 1 S-shaped the dancer roller 6 and the offset roller 11. The dancer roller 6 and the offset roller 11 are respectively in the bottom of loops, which are formed by the course of the endless foil 1. Behind the offset roller 11, the endless foil 1 is deflected around the first deflection roller 15.

Hinter der ersten Umlenkrolle 15 befindet sich eine Entnahmevorrichtung 10, welche der erfindungsgemäßen Vorrichtung Folie 1 diskontinuierlich entnimmt sowie eine Trennvorrichtung 4. Bei der Entnahmevorrichtung 10 handelt es sich um eine herkömmliche Vorrichtung, welcher wiederholt einen Teil der Folie aufnimmt und durch eine Pendelbewegung aus der erfindungsgemäßen Vorrichtung zieht. Die Trennvorrichtung 4 kann dergestalt ausgebildet sein, daß sie die Endlosfolie 1 zerschneidet. Jedenfalls wird durch die Trennvorrichtung 4 der Anfang eines zu bedruckenden Abschnitts festgelegt. Nach dem Anfang des zu bedruckenden Abschnitts richtet sich der Beginn des von der Druckeinrichtung 2 erzeugten Druckbilds.Behind the first guide roller 15 is a removal device 10 which the device according to the invention intermittently removes film 1 and a Separator 4. The sampler 10 is a conventional one Device which repeatedly receives a part of the film and through a pendulum movement pulls out of the device according to the invention. The separator 4 may be formed such that it cuts the endless foil 1. Anyway, by the separator 4, the beginning of a section to be printed established. After the beginning of the section to be printed depends the beginning of the printed image generated by the printing device 2.

Die Tänzerwalze 6 und die Offsetwalze 11 sind so angeordnet, daß sie gegeneinander zu und voneinander weg bewegt werden können. Während die Offsetwalze 11 feststellbar ist, ist die Tänzerwalze 6 frei beweglich. Die Tänzerwalze 6 und die Offsetwalze 11 bilden somit die Anordnung zum Puffern der Endlosfolie 1. Durch Verstellen der Offsetwalze 11 kann die Länge der Endlosfolie 1 zwischen der Trennvorrichtung und der Druckeinrichtung 2 eingestellt werden. Dies ist erforderlich, wenn sich die vorbestimmte Länge L der Abschnitte verändert.The dancer roller 6 and the offset roller 11 are arranged so as to be against each other can be moved to and away from each other. While the offset roller 11 can be determined, the dancer roller 6 is free to move. The dancer roller 6 and the Offsetwalze 11 thus form the arrangement for buffering the endless film 1. Through Adjusting the offset roller 11, the length of the endless film 1 between the separator and the printing device 2 are set. This is required when the predetermined length L of the sections changes.

Die erste Umlenkrolle 15 ist mit einem ersten Drehgeber 5 verbunden. Am Ausgang des ersten Drehgebers 5 erscheint ein Signal, welches proportional der von der ersten Umlenkrolle 15 durchgeführten Drehbewegung ist. Die zweite Umlenkrolle 17 ist mit einem zweiten Drehgeber 7 verbunden. Am Ausgang des zweiten Drehgebers 7 erscheint ein Signal, welches proportional der von der zweiten Umlenkrolle 17 durchgeführten Drehbewegung ist.The first guide roller 15 is connected to a first rotary encoder 5. At the exit of the first encoder 5 appears a signal which is proportional to that of the first Deflection pulley 15 performed rotary motion. The second guide roller 17 is connected to a second rotary encoder 7. At the output of the second encoder. 7 appears a signal which is proportional to that of the second guide roller 17th performed rotational movement is.

Im Bereich der Tänzerwalze 6 ist ein optischer Sensor 3 derart angeordnet, daß das an seinem Ausgang 3a auftretende Signal stets dann einen Signalwechsel vornimmt, wenn die Länge der Endlosfolie 1 zwischen der Trennvorrichtung T und der Druckeinrichtung 2 einem vorbestimmten Vielfachen der vorbestimmten Länge L entspricht.In the area of the dancer roller 6, an optical sensor 3 is arranged such that the always occurs at its output 3a signal occurs then a signal change, when the length of the endless film 1 between the separator T and the printing device 2 corresponds to a predetermined multiple of the predetermined length L.

Während der Zeit, während der die Entnahmevorrichtung 10 sich zur Aufnahme eines Abschnitts der Folie 1 in einer Ruheposition befindet, wird aus der Druckvorrichtung keine Folie 1 entnommen. Bei einem kontinuierlichen Durchlauf von Folie 1 durch den Drucker 2 vergrößert sich die Länge der Folie 1, welche sich zwischen der Trennvorrichtung 4 und dem Drucker 2 befindet. Hierdurch senkt sich die Tänzerwalze 6 nach unten. Die Tänzerwalze 6 senkt sich solange nach unten, bis durch die Entnahmevorrichtung 10 Folie 1 aus der erfindungsgemäßen Vorrichtung entnommen wird. Die Darstellung in der Figur entspricht etwa dem Zeitpunkt, zu dem die Entnahmevorrichtung 10 beginnt, der erfindungsgemäßen Vorrichtung Folie 1 zu entnehmen.During the time during which the removal device 10 for receiving a Section of the film 1 is in a rest position is from the printing device no foil 1 removed. In a continuous run of film 1 by the printer 2, the length of the film 1, which extends between the Separator 4 and the printer 2 is located. This lowers the dancer roller 6 down. The dancer roller 6 lowers down as long as through the Removal device 10 Slide 1 removed from the device according to the invention becomes. The representation in the figure corresponds approximately to the time at which the Removal device 10 begins, the device according to the invention to slide 1 remove.

Durch den Entnahmevorgang wird der erfindungsgemäßen Vorrichtung Folie 1 mit einer Geschwindigkeit entnommen, die einem Vielfachen der Geschwindigkeit entspricht, mit der die Folie 1 den Drucker 2 passiert. Da der erfindungsgemäßen Vorrichtung mehr Folie 1 entnommen wird als durch den Drucker 2 transportiert wird, verkürzt sich die Länge der Folie 1 zwischen der Trennvorrichtung 4 und dem Drukker 2. Durch die Verkürzung der Länge wird die Tänzerwalze 6 nach oben bewegt.By the removal process, the device according to the invention is film 1 with taken from a speed which is a multiple of the speed, with which the film 1 passes the printer 2. As the device of the invention more foil 1 is removed than is transported by the printer 2, shortens the length of the film 1 between the separator 4 and the Drukker 2. By shortening the length of the dancer roller 6 is moved upward.

In dem Augenblick, wo die Tänzerwalze 6 die Position hat, in der sie dem Sensor 3 gegenübersteht und der Sensor 3 über seinen Ausgang 3a ein Signal an den Eingang 2a des Druckers 2 abgibt, beträgt die Länge der Folie 1 zwischen der Trennvorrichtung 4 und der dem Anfang eines zu bedruckenden Abschnitts entsprechenden Stelle der Folie 1 beispielsweise das Zehnfache der Länge eines zu bedruckenden Abschnitts. Da der Drucker 2 genau in dem Augenblick ein Signal zum Drucken erhält, wird das Druckbild genau an den Anfang eines zu bedruckenden Abschnitts gesetzt. Es versteht sich, daß, wenn abhängig vom Druckertyp eine Strecke berücksichtigt werden muß, die beispielsweise dem Teil des Umfangs einer Bildwalze entspricht, der sich zwischen dem Beschreiben der Bildwalze und dem Abdruck der Bildwalze auf die Folie 1 befindet, dieser Teil durch einen entsprechenden Offsetausgleich berücksichtigt werden muß.At the moment when the dancer roller 6 has the position in which they the sensor 3 facing and the sensor 3 via its output 3a, a signal to the input 2a of the printer 2, the length of the film 1 is between the separator 4 and the beginning of a section to be printed Place the film 1, for example, ten times the length of a to be printed Section. Since the printer 2 at the moment a signal for printing receives the print image at the very beginning of a section to be printed set. It will be understood that, if dependent on the printer type, a route is taken into account must be, for example, corresponds to the part of the circumference of an image roller, between the writing of the image roller and the imprint of the Image roller is located on the film 1, this part by a corresponding offset compensation must be taken into account.

Der Ausgang des zweiten Drehgebers 7, der Ausgang des ersten Drehgebers 5 sowie der Ausgang 3a des Sensors 3 sind mit der Recheneinheit 12 verbunden, welche zum einen den Mittelwert des vom ersten Drehgeber 5 abgegebenen Signals bildet und zum anderen die Differenz zwischen den Ausgangssignalen der beiden Drehgeber 5, 7 bildet. Ein erster Ausgang der Recheneinheit 12 ist mit einem Verzögerungsglied 13 verbunden. Der Ausgang des Verzögerungsglieds 13 ist mit einem Eingang 2a der Druckeinrichtung 2 zur Aktivierung des Druckvorgangs verbunden. Mittels des Verzögerungsglieds 13 kann das den Druckvorgang aktivierende Signal verzögert werden, so daß der Abstand des Druckbildes zum Anfang eines zu bedruckenden Abschnitts eingestellt werden kann.The output of the second rotary encoder 7, the output of the first rotary encoder 5 and the output 3a of the sensor 3 are connected to the arithmetic unit 12, which on the one hand, the mean value of the output from the first encoder 5 signal and on the other hand, the difference between the output signals of the two Encoder 5, 7 forms. A first output of the arithmetic unit 12 is provided with a delay element 13 connected. The output of the delay element 13 is connected to a Input 2a of the printing device 2 connected to activate the printing process. By means of the delay element 13, the signal activating the printing process be delayed so that the distance of the print image to the beginning of a to be printed Section can be adjusted.

Ein zweiter Ausgang der Recheneinheit 12 ist mit einem weiteren Eingang 2b der Druckeinrichtung 2, welcher zur Steuerung der Geschwindigkeit, mit der die Endlosfolie 1 durch die Druckeinrichtung 2 transportiert wird, vorgesehen ist, verbunden. Das von der Steuereinheit 12 an den weiteren Eingang 2b der Druckeinrichtung 2 abgegebene Signal entspricht dem Mittelwert des vom ersten Drehgeber 5 abgegebenen Signals. Hierdurch entspricht die Geschwindigkeit, mit der die Endlosfolie 1 durch die Druckeinrichtung 2 transportiert wird, exakt dem mittleren Wert der Geschwindigkeit, mit der die Entnahmevorrichtung 10 der erfindungsgemäßen Vorrichtung Folie 1 entnimmt.A second output of the arithmetic unit 12 is connected to a further input 2b of Printing device 2, which is used to control the speed at which the endless film 1 is transported by the printing device 2, is provided connected. That of the control unit 12 to the further input 2b of the printing device. 2 output signal corresponds to the mean value of the output from the first encoder 5 Signal. This corresponds to the speed at which the endless foil 1 transported by the printing device 2, exactly the mean value of the speed, with the removal device 10 of the device according to the invention Slide 1 takes.

Da das vom zweiten Drehgeber 7 abgegebene Signal dem Istwert der Geschwindigkeit entspricht, mit der Endlosfolie 1 durch die Druckeinrichtung 2 transportiert wird, kann das Signal von der Recheneinheit 12 zur Konstantregelung der Geschwindigkeit der Druckeinrichtung 2 verwendet werden.Since the output from the second encoder 7 signal the actual value of the speed corresponds, is transported by the endless film 1 by the printing device 2, For example, the signal from the arithmetic unit 12 for constant speed control the printing device 2 can be used.

Die von der Recheneinheit 12 gebildete Differenz der Ausgangssignale der beiden Drehgeber der 5, 7 stellt ein Maß der Länge der sich in der Pufferanordnung befindlichen Endlosfolie 1 dar. Damit die Hubbewegung der Tänzerwalze 6 um den Sensor 3 in beide Richtungen gleich groß ist, muß die Länge der sich in der Pufferanordnung befindlichen Endlosfolie 1 einen bestimmten Betrag haben. Da es sich sehr vorteilhaft auf die Genauigkeit der Positionierung des Druckbildes auf die Endlosfolie 1 auswirkt, wenn die Hubbewegung der Tänzerwalze 6 um den Sensor 3 in beide Richtungen gleich groß ist, wird mittels der Recheneinheit 12 das an den weiteren Eingang 2b der Druckeinheit 2 abgegebene Signal so beeinflußt, daß die Länge der sich in der Pufferanordnung befindlichen Endlosfolie 1 dem vorbestimmten Betrag entspricht.The difference formed by the arithmetic unit 12 of the output signals of the two 5, 7 provides a measure of the length of the buffer assembly Endless film 1. Thus, the lifting movement of the dancer roller 6 to the sensor 3 is equal in both directions, the length of which must be in the buffer arrangement located endless foil 1 have a certain amount. Since it is very advantageous to the accuracy of the positioning of the printed image on the endless foil 1 affects when the lifting movement of the dancer roller 6 to the sensor 3 in both Directions is equal, is by means of the arithmetic unit 12 to the other Input 2b of the printing unit 2 output signal so influenced that the length of in the buffer assembly endless film 1 the predetermined amount equivalent.

Nachfolgend wird die Funktion der erfindungsgemäßen Vorrichtung beschrieben.The function of the device according to the invention will be described below.

Mittels der Entnahmevorrichtung 10 wird der erfindungsgemäßen Vorrichtung diskontinuierlich Endlosfolie 1 entnommen. Der Drehgeber 5 gibt daher entsprechend Impulsgruppen ab. Die Impulsgruppen werden der Recheneinheit 12 zugeführt, welche daraus einen Mittelwert bildet. Der Mittelwert wird an den weiteren Eingang 2b der Druckeinrichtung 2 geleitet, wodurch die Transportgeschwindigkeit der Druckeinheit 2 der mittleren Geschwindigkeit entspricht, mit der die Entnahmevorrichtung 10 der erfindungsgemäßen Vorrichtung Folie 1 entnimmt. By means of the removal device 10, the device according to the invention becomes discontinuous Endless film 1 removed. The rotary encoder 5 are therefore correspondingly Impulse groups off. The pulse groups are fed to the arithmetic unit 12, which from this forms an average. The mean value is sent to the further input 2b the printing device 2 passed, whereby the transport speed of the printing unit 2 corresponds to the average speed with which the removal device 10 of the device according to the invention takes film 1.

Stellt der zweite Drehgeber 7 eine Abweichung von der vorgegebenen Geschwindigkeit fest, erhöht die Recheneinheit 12 das an den weiteren Anschluß 2b der Druckeinheit 2 abgegebene Signal, so daß der Pufferanordnung wieder soviel Endlosfolie 1 zugeführt wird, wie ihr im Mittel durch die Entnahmevorrichtung 10 entnommen wird.If the second rotary encoder 7 sets a deviation from the predetermined speed fixed, the arithmetic unit 12 increases that to the other terminal 2b of the printing unit 2 output signal, so that the buffer assembly again as much endless foil 1 is supplied, as you taken on average by the removal device 10 becomes.

Durch die diskontinuierliche Entnahme der Entnahmevorrichtung 10 führt die Tänzerwalze 6 eine Hubbewegung durch. Der Sensor 3 ist so angeordnet, daß er sich in der Mitte der von der Tänzerwalze 6 ausgeführten Hubbewegung befindet. Hierdurch ist der jeweilige Abstand der Tänzerwalze 6 am Umkehrpunkt ihrer Bewegung zum Sensor 3 gleich groß. Wird der Pufferanordnung beispielsweise aufgrund einer Störung mehr Endlosfolie zugeführt, als ihr entnommen wird, verschiebt sich der Mittelpunkt, um den die Tänzerwalze 6 pendelt, nach unten. Der Sensor 3 befindet sich somit nicht mehr in diesem Mittelpunkt.Due to the discontinuous removal of the removal device 10 performs the dancer roller 6 a stroke movement. The sensor 3 is arranged to be in the center of the running of the dancer roller 6 stroke movement is located. hereby is the respective distance of the dancer roller 6 at the reversal point of their movement to Sensor 3 the same size. The buffer arrangement, for example, due to a fault fed more continuous film than it is removed, the center shifts, around which the dancer roller 6 commutes, down. The sensor 3 is located thus no longer in this center.

Durch die Zuführung von mehr Endlosfolie 1 in die Pufferanordnung hat sich die von der Recheneinheit 12 gebildete Differenz der Ausgangssignale der beiden Drehgeber 5, 7 verändert. Entsprechend der Veränderung korrigiert die Recheneinheit 12 das an den weiteren Eingang 2b der Druckeinheit 2 abgegebene Signal derart, daß die ursprüngliche Differenz wieder hergestellt wird, das heißt, daß sich der Sensor 3 wieder in der Mitte der von der Tänzerwalze 6 durchgeführten Hubbewegung befindet.By feeding more continuous film 1 in the buffer arrangement, the of the arithmetic unit 12 formed difference of the output signals of the two encoders 5, 7 changed. According to the change, the arithmetic unit 12 corrects the output to the other input 2b of the printing unit 2 signal such that the original difference is restored, that is, the sensor 3 is again in the middle of the performed by the dancer roller 6 stroke movement.

Da durch eine Änderung der Geschwindigkeit mit der der Vorrichtung Folie entnommen wird, der Pufferanordnung mehr oder weniger Folie entnommen wird als ihr zugeführt wird, verschiebt sich hierbei der Mittelpunkt, um den die Tänzerwalze 6 pendelt, ebenso. Diese Verschiebung wird auf die selbe Weise korrigiert, wie die Verschiebung der Tänzerwalze 6 aufgrund einer Störung. Somit kann mittels der Differenzbildung der Signale der beiden Drehgeber 5, 7 bei einer Änderung der Geschwindigkeit, mit der der Vorrichtung Folie entnommen wird, die optimale Position der Tänzerwalze 6 automatisch wieder hergestellt werden. Since taken by a change in speed with the device film is taken, the buffer assembly more or less film is fed as her is, shifts the center around which the dancer roller 6 commutes, as well. This shift is corrected in the same way as the shift the dancer roller 6 due to a fault. Thus, by means of difference formation the signals of the two rotary encoders 5, 7 with a change of the speed, with the device film is removed, the optimal position the dancer roller 6 are automatically restored.

In dem Augenblick, wo sich die Tänzerwalze 6 gegenüber dem Sensor 3 befindet, tritt am Ausgang 3a des Sensors 3 ein Signalwechsel auf. Der Signalwechsel wird in die Recheneinheit 12 geleitet, welche ein entsprechendes Ausgangssignal an das Verzögerungsglied 13 abgibt. Soll keine Korrektur des Druckbilds vorgenommen werden, leitet die Recheneinheit 12 sowie das Verzögerungsglied 13 das Signal unverzögert an den einen Druckvorgang aktivierenden Eingang 2a der Druckeinheit 2.At the moment when the dancer roller 6 is opposite the sensor 3, occurs at the output 3a of the sensor 3, a signal change. The signal change is in the arithmetic unit 12 passed, which a corresponding output signal to the Delay member 13 delivers. If no correction of the print image is made are, the arithmetic unit 12 and the delay element 13, the signal passes instantaneously to the one printing activating input 2a of the printing unit. 2

Wenngleich der in der beschriebenen Ausführungsform verwendete Sensor 3 auch ein optischer Sensor ist, so könnte statt dessen auch ein sogenannter elektronischer Maßstab verwendet werden. Statt eines Signalwechsels müßte die Recheneinheit 12 dann ein bestimmtes vom Maßstab abgegebenes Längenmaß auswerten. Mittels eines elektronischen Maßstabs ließe sich in vorteilhafter Weise eine mechanische Justage des Sensors 3 vermeiden, da die Justage durch eine Änderung des vom Maßstab ausgegebenen Längenmaßes beziehungsweise der vorgenommenen Berechnung vorgenommen werden könnte. Hierdurch könnte auch auf Offsetwalze 11 verzichtet werden, da sich die durch die Offsetwalze 11 bewirkte Längenänderung der Endlosfolie 1 auch durch die Recheneinheit 12 berücksichtigen ließe.Although the sensor 3 used in the described embodiment also is an optical sensor, so could instead a so-called electronic Scale can be used. Instead of a signal change would have the arithmetic unit 12th then evaluate a certain length measure given by the scale. through an electronic scale could be advantageously a mechanical Avoid adjustment of the sensor 3, as the adjustment is due to a change of the Scale output length measure or the calculation made could be made. This could also on Offsetwalze 11 be omitted, since caused by the offset roller 11 change in length the endless film 1 could also be considered by the arithmetic unit 12.

Claims (6)

  1. Device for printing an unmarked endless foil (1) with printed images arranged within a section of a predetermined length (L), comprising a printing apparatus (2) through which the endless foil (1) may be transported continuously, possibly also without any printing procedure; a transport element (10) by means of which the endless foil (1) may be advanced in each case by the predetermined length (L), whereby the endless foil (1) may be divided into the sections of predetermined length (L) after printing, whereby the printed images have to be applied precisely positioned on the endless foil (1) in relation to the borders (T) between two successive sections of predetermined length (L); a sensor (3) for producing an output signal, by means of which the printing apparatus (2) may be activated each time for performing a printing procedure involving only a single printed image when the length of the endless foil (1) between the section border (T') produced by the respective last made subdivision and the printing apparatus (2) is a predetermined multiple of the second predetermined length (L); an arrangement (6, 11) for buffering the endless foil, characterised in that at least one first sensing member (5) is positioned at the output of the buffer arrangement (6, 11), said sensing member being able to detect the advance length of the endless foil (1), whereby the average speed at which the endless foil (1) is advanced may be determined and used to adjust the speed at which the endless foil (1) is transported through the printing apparatus (2).
  2. Device according to claim 1, characterised in that the buffer arrangement (6, 11) has a compensating roller (6) which is movably arranged such that the position of the compensating roller (6) depends on the length of the endless foil (1) between the section border (T') produced by the respective last made subdivision and the printing apparatus (2), whereby the position of the compensating roller (6) may be detected by means of a sensor (3).
  3. Device according to one of the claims 1 to 2, characterised in that an offset roller (11) is provided by means of which the length of the endless foil (1) between the section border (T') produced by the respective last made subdivision and the printing apparatus (2) may be altered.
  4. Device according to one of the claims 2 to 3, characterised in that the sensor (3) is arranged such that at the output (3') of the sensor (3), a signal or a signal change occurs in each case if the length of the endless foil (1) between the section border (T') produced by the respective last made subdivision and the printing apparatus (2) is a predetermined multiple of the predetermined length (L).
  5. Device according to one of the claims 1 to 4, characterised in that a second sensing member (7) is arranged at the input to the buffer arrangement (6, 11), by means of which the advance length of the endless foil (1) may be detected, whereby the transport speed of the endless foil (1) may be determined and used for regulating the speed at which the endless foil (1) is transported through the printing apparatus (2).
  6. Device according to claim 5, characterised in that a computer unit (12) is provided by means of which the difference in the output signals of the sensing members (5, 7) may be found and used to correct the activation of the printing procedure.
EP99121278A 1998-10-31 1999-10-25 Device for printing an endless foil having no marks Expired - Lifetime EP1000759B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19850274A DE19850274C1 (en) 1998-10-31 1998-10-31 Device for printing a label-free continuous film
DE19850274 1998-10-31

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EP1000759A2 EP1000759A2 (en) 2000-05-17
EP1000759A3 EP1000759A3 (en) 2000-11-02
EP1000759B1 true EP1000759B1 (en) 2005-12-14

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US (1) US6564710B1 (en)
EP (1) EP1000759B1 (en)
AT (1) ATE312719T1 (en)
BR (1) BR9905335A (en)
CA (1) CA2287754C (en)
DE (2) DE19850274C1 (en)
DK (1) DK1000759T3 (en)
ES (1) ES2252904T3 (en)
HU (1) HU218886B (en)

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US20070194034A1 (en) * 2006-02-17 2007-08-23 Vasilios Vasiadis Device for printing pills, tablets or caplets in a precise manner
US20080022872A1 (en) * 2006-07-28 2008-01-31 The Procter & Gamble Company Apparatus for perforating printed or embossed substrates
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Also Published As

Publication number Publication date
EP1000759A2 (en) 2000-05-17
HU9903756D0 (en) 1999-12-28
DK1000759T3 (en) 2006-04-18
CA2287754A1 (en) 2000-04-30
DE59912923D1 (en) 2006-01-19
ATE312719T1 (en) 2005-12-15
HUP9903756A1 (en) 2000-05-28
HU218886B (en) 2000-12-28
BR9905335A (en) 2000-09-26
DE19850274C1 (en) 2000-05-25
ES2252904T3 (en) 2006-05-16
CA2287754C (en) 2004-02-10
US6564710B1 (en) 2003-05-20
EP1000759A3 (en) 2000-11-02

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