EP0839092B1 - Device for positionally exact printing of continuous sheeting - Google Patents

Device for positionally exact printing of continuous sheeting Download PDF

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Publication number
EP0839092B1
EP0839092B1 EP96925637A EP96925637A EP0839092B1 EP 0839092 B1 EP0839092 B1 EP 0839092B1 EP 96925637 A EP96925637 A EP 96925637A EP 96925637 A EP96925637 A EP 96925637A EP 0839092 B1 EP0839092 B1 EP 0839092B1
Authority
EP
European Patent Office
Prior art keywords
printer
length
sensor
film
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
EP96925637A
Other languages
German (de)
French (fr)
Other versions
EP0839092A1 (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
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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Publication of EP0839092A1 publication Critical patent/EP0839092A1/en
Application granted granted Critical
Publication of EP0839092B1 publication Critical patent/EP0839092B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H35/00—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers
    • B65H35/0006—Article or web delivery apparatus incorporating cutting or line-perforating devices
    • B65H35/006—Article or web delivery apparatus incorporating cutting or line-perforating devices with means for delivering a predetermined length of tape
    • B65H35/0066—Article or web delivery apparatus incorporating cutting or line-perforating devices with means for delivering a predetermined length of tape this length being adjustable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/36—Blanking or long feeds; Feeding to a particular line, e.g. by rotation of platen or feed roller
    • B41J11/42—Controlling printing material conveyance for accurate alignment of the printing material with the printhead; Print registering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/66—Applications of cutting devices
    • B41J11/663—Controlling cutting, cutting resulting in special shapes of the cutting line, e.g. controlling cutting positions, e.g. for cutting in the immediate vicinity of a printed image
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/66—Applications of cutting devices
    • B41J11/666—Cutting partly, e.g. cutting only the uppermost layer of a multiple-layer printing 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
    • B41J15/005—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
    • B41J15/04—Supporting, feeding, or guiding devices; Mountings for web rolls or spindles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/042—Sensing the length of a web loop
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/10—Size; Dimensions
    • B65H2511/11—Length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2553/00—Sensing or detecting means
    • B65H2553/40—Sensing or detecting means using optical, e.g. photographic, elements

Definitions

  • the invention relates to a device for printing a no markings with continuous film with printed images a first predetermined length, the film after printing in sections of a second predetermined Length is divided by means of a separator and the printed images in relation to the separation points between the Sections are applied to the film in the exact position have to.
  • Such a printing device is found, for example, in the pharmaceutical industry application. Here it comes down to it on, so-called blister packs, in which, for example Tablets are in position with a To provide print image.
  • the tablets are regularly made of plastic or paper existing thermoformed film, which by means of a cover film is sealed.
  • a printed image which is usually information about the tablets, such as data about when to take which tablets. It is therefore crucial that this information according to the position the tablets are attached to the cover film.
  • the cover film To position the cover film with the thermoforming film To be able to, the printed image is already in the pre-printed Slides designed a bit smaller than it actually is would be needed. The resulting difference in length becomes balanced by a so-called stretching.
  • the cover sheet is required by a special device Length drawn. By consciously making a deviation the length of the printed image in a certain direction and compensates for this deviation individually, it is avoided that manufacturing tolerances accumulate, however, such a method is very complex.
  • a device is known from DE 34 20 304 A1, which has several autonomous printing units, which are able to different To perform printing. Furthermore, the device has one or more independent units for finishing, which are able perform various finishing operations such as perforations or cuts. In addition, the device has devices for the optional control of each of these independent units, which the independent units so control that printing and / or finishing the function of the work, which is carried out by the fast printer is adapted.
  • the facilities for optional controls have sensors which are based on the print Recognize sluggish markings, which by the fast printer be carried out.
  • the object of the invention is a printing device mentioned at the beginning specify by means of which a printed image is in position can be applied to a film, one Accumulation of an error should be excluded.
  • a printer which an input for triggering a positionally accurate printing process has, as well as a sensor, which then always on his Output emits a signal when the length of the slide between the separator and the beginning of one too corresponding to the printing section a predetermined Corresponds to multiples of the second predetermined length, the output of the sensor with the input of the Printer is connected.
  • the predetermined multiple of the second predetermined Length for example, ten times the length of a section to be printed and is the length of the Foil between the separator and the location of the Foil attached to the printer when there is an input signal would set the beginning of the printed image, less than that Ten times the second predetermined length, the gives Sensor no signal, that is, a printing process not started. Now there is additional film through the printer transported so that the length between the separator and the printer is enlarged, so the Point reached where the length of the film between the separator and the location where the printer is present Input signal his print image would start ten times corresponds to the second predetermined length. By doing The sensor immediately outputs an output signal to the Printer. That is, the printer starts printing exactly at the point of the slide that is the beginning of one corresponding to the printing section.
  • a printer is used in a particularly advantageous manner electrophotographic printer such as a Laser or LED printer used.
  • electrophotographic printer such as a Laser or LED printer used.
  • the arrangement works but just as beneficial if using an ion transfer printer or thermal transfer printer or the like is used.
  • the Printer can perform its printing process precisely and controlled the positioning via an input signal can be.
  • the device is printed Sections are taken discontinuously provided that the sensor is an optical sensor which detects the position of a dancer roller, which is movable is arranged so that the position of the dancer roller the length of the film between the separator and the Printer depends. This will make it very accurate reached.
  • the dancer roller To compensate for the changing length of the film between the separator and the printer is the dancer roller intended.
  • the dancer roll is in one Loop of the film, which is caused by a deflection of the film is generated around the dancer roll.
  • the length is shortened of the film, the dancer roll is towards the loop opening emotional.
  • the length of the film increases, moves the dancer roller away from the opening of the loop, causing the path of the film around the dancer roller is enlarged.
  • the sensor is arranged at the location of the device, on which is the dancer roller, if the path is along the the film between the separator and the beginning a position corresponding to the section to be printed extends, for example ten times the second predetermined Corresponds to the length, the sensor emits a signal the printer. This will take you to the desired location creates a print image on the film.
  • the accuracy could be increased by the fact that Change in length between the separator and the film located in the printer is detected in that the dancer roller is looped, for example, a rope, which at its end facing the separating device is fixed and movable at its end facing the printer is attached.
  • the rope takes off the same course as the slide.
  • the position of the is movable arranged rope end depending on the position of the dancer roller.
  • the movably arranged end of the Seils notice the same change in length as in the between the separator and the printer Part of the slide occurs.
  • the movably arranged rope end cover the double distance that the dancer roller covers, would be arranged on a movable rope end Sensor has twice the resolution of that on the Dancer roller arranged sensor, which is advantageous on affects the accuracy.
  • An offset roller is used to adjust the position of the dancer roller provided which is arranged such that through it the length of the film between the separator and the printer can be changed. Then this is from Advantage if the format of the printed image or of the section to be printed changes because of this the length of the film between the separation point and the Printer needs to be changed. To the position of the dancer roller despite the changed length between the separator and leaving the printer unchanged becomes the offset roller shifted so far that the length of between the separator and the printer foil in turn a predetermined multiple of the second, now changed, predetermined length corresponds when the Dancer roll is located opposite the sensor. This will Avoid changing the position of the printer must if the section length changes.
  • a further advantageous embodiment of the invention provides before that a device is provided by means of which Printer speed is controlled.
  • Printer speed is controlled.
  • To be particularly advantageous has become familiar with the use of a dancer roller Proximity sensor highlighted, which depending on the Removal of the dancer roller from a ramp of the sensor outputs the corresponding signal. Since the dancer roll at described discontinuous removal of film the printing device is in constant motion is preferred Way an average of the due to the ramp of the Proximity sensor also constantly changing sensor output signal educated.
  • the offset roller is set so the point around which the dancer roller swings back and forth approx. in at the usual section length and removal rate the middle of the ramp of the sensor.
  • the control is moreover expediently designed so that the Size of the sensor signal both upwards and downwards is limited below. This will speed up the Printer also limited by a maximum and a minimum.
  • the removal rate or the length of the printed increases Sections, the printing device becomes more per unit of time Foil removed than before. Since the printer initially with constant Printing speed continues, the length is shortened the film between the separator and the printer. This moves the point around which the dancer roll commutes upwards, which increases the speed of the Printer increased. Has the printer speed matched the adjusted new section length and / or removal rate, commutes the dancer roller around a point that is now in the upper area of the ramp of the proximity sensor. The means that the changed pendulum center gives the Proximity sensor a mean value signal, based on that the printer is printing at a higher speed. The same The process takes place with the opposite sign if the section length decreases and / or the removal rate decreased. In this case the dancer roll swings a point of the proximity sensor that is in the lower range the ramp is located.
  • the sensor Because of the changed pendulum center of the dancer roller the vertices of the dancer roller sway also change, the sensor must also change its position to be changed. The sensor must be moved so far that it in turn emits an output signal when the Length of between the separator and the The foil in the printer is a multiple of that second, possibly changed, predetermined length corresponds to a printed section.
  • the only figure shows a schematic arrangement a printing device according to the invention.
  • a printing device In a printing device according to the invention, one becomes printing film 1, which is unwound from a roll 8 is passed through a printer 2. Behind the printer 2 the film 1 is deflected around a first deflection roller 9a. The film 1 wraps around the first deflecting roller 9a S-shaped a dancer roller 6 and an offset roller 5. Die The dancer roller 6 and the offset roller 5 are located in each case in the bottom of loops, which through the course of the film 1 are formed. The film is behind the offset roller 5 1 deflected around a second deflecting roller 9b. Behind the second Deflection roller 9b is a removal device 10, which slide 1 in a discontinuous manner Removed printing device. With the removal device 10 is a conventional device, which repeatedly takes up part of the film 1 and through a Pendulum movement pulls out of the printing device.
  • the separating device 4 can be designed in this way be that it cuts the film 1.
  • the separator 4 the beginning of a printable Range set. Judging by the beginning of the area the beginning of the print image generated by printer 2.
  • the dancer roller 6 and the offset roller 5 are arranged that they are moved towards and away from each other can. While the offset roller 5 can be determined, the Dancer roller 6 freely movable.
  • the proximity sensor 7 is designed or arranged so that the Distance of the dancer roller 6 to the proximity sensor 7 in the course the movement of the dancer roller 6 over an active area constantly changing. Outside the active area is the Distance of the dancer roller 6 from the proximity sensor 7 constant.
  • the sensor 3 is designed and has a light barrier an output 3a. Appears at output 3a of sensor 3 always a signal when the dancer roller 6 in one certain position in front of the sensor 3. Conveniently the position is in the middle of printed images Length and average withdrawal rate in the lower third of the active area of the proximity sensor 7. Such Adjustment can be effected by the offset roller 5.
  • the output 3a of the sensor 3 is connected to the input 2a of the Printer 2 connected. The length of the printed image changes containing section, the sensor 3 must be adjusted be so that it changes the length of the between the separator 4 and the printer 2 film is adjusted.
  • the printing device becomes film 1 taken at a speed that is a multiple corresponds to the speed at which the film 1 Printer 2 happens. Since the printing device has more film 1 is removed as transported by the printer 2, shortens the length of the film 1 between the separator 4 and the printer 2. By shortening the Length the dancer roller 6 is moved upwards.
  • the dancer roller 6 is in the position in which the sensor 3 sends a signal via its output 3a outputs the input 2a of the printer 2, the length is Slide 1 between the separator 4 and the beginning a position corresponding to a section to be printed, for example ten times the length of a printable Section. Because the printer 2 is just at the moment Receives signal for printing, the print image is sent to the Start of a section to be printed. It understands that if a route depends on the type of printer must be taken into account, for example the part of the The circumference of an image roller corresponds to that between the Describe the image roller and the imprint of the image roller the slide 1 is located, this part by a corresponding Offset compensation must be taken into account.
  • the offset roller 5 is arranged so that the discontinuous Removal of film 1 from the printing device existing pendulum movement of the dancer roller 6 at medium Length of the section receiving the printed image and average removal rate around the center of the active area of the proximity sensor 7 takes place.
  • the first predetermined length D of the printed image increases and thus the second predetermined length L of the to be printed Section, the part of the film 1, which is between the separator 4 and the Printer 2 is located, also increase the length of this Partly always a predetermined multiple, such as ten times the second predetermined length L must correspond.
  • the dancer roller 6 would thereby reach the area of the proximity sensor 7.
  • the offset roller 5 must therefore be moved up so far that which enlarged by a larger section to be printed Pendulum movement of the dancer roller 6 in turn by one Point takes place in the middle of the active area.
  • the sensor 3 Since the sensor 3 always has a signal at its output 3a must give up if the length of the film 1, which is between the separator 4 and the printer 2, for example ten times the second predetermined Corresponds to length L, the sensor 3 is expediently movable arranged. He can therefore, if necessary, to the different way of the dancer shaft 6 can be adapted.
  • the present invention is also based on a Printing device was described, discontinuously from the film 1 is removed, it can still in the same Way with a continuous removal of film 1 from a printing device can be applied. Because with a continuous Removal of film 1 from a printing device if necessary, the dancer roller 6 can be dispensed with could be a different structure of the printing device surrender. However, it is essential that a sensor 3 is present is that always emits a signal at its output, if the length of the between the separator 4 and the printer 2 located film 1 a multiple of second predetermined length of the portion to be printed corresponds.

Landscapes

  • Handling Of Sheets (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Controlling Sheets Or Webs (AREA)
  • Discharging, Photosensitive Material Shape In Electrophotography (AREA)
  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Printing Methods (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)

Abstract

In an apparatus for accurately imprinting print images onto sections of a predetermined length of a continuous unmarked foil, wherein a printer is disposed at a distance from a foil section delivery device which receives from the printer unprinted foil along a predetermined path, a foil sensor is arranged along the foil path which sensor has an output connected to the printer for supplying to the printer a printing signal when the length of the foil between the delivery device and a point on the foil corresponding to the beginning of a section to be imprinted is a predetermined multiple of the length of the foil sections to be imprinted so as to initiate printing of the printer accurately within a section of the foil.

Description

Die Erfindung betrifft eine Vorrichtung zum Bedrucken einer keine Markierungen aufweisenden Endlosfolie mit Druckbildern einer ersten vorbestimmten Länge, wobei die Folie nach dem Bedrucken in Abschnitte einer zweiten vorbestimmten Länge mittels einer Trennvorrichtung aufgeteilt wird und die Druckbilder in Bezug auf die Trennstellen zwischen den Abschnitten positionsgenau auf die Folie aufgebracht werden müssen. The invention relates to a device for printing a no markings with continuous film with printed images a first predetermined length, the film after printing in sections of a second predetermined Length is divided by means of a separator and the printed images in relation to the separation points between the Sections are applied to the film in the exact position have to.

Eine derartige Druckvorrichtung findet beispielsweise in der pharmazeutischen Industrie Anwendung. Hier kommt es darauf an, sogenannte Blisterverpackungen, in der sich beispielsweise Tabletten befinden, positionsgenau mit einem Druckbild zu versehen.Such a printing device is found, for example, in the pharmaceutical industry application. Here it comes down to it on, so-called blister packs, in which, for example Tablets are in position with a To provide print image.

Die Tabletten werden regelmäßig von einer aus Kunststoff oder Papier bestehenden Tiefziehfolie umhüllt, welche mittels einer Deckfolie versiegelt ist. Auf der Deckfolie befindet sich ein Druckbild, welches üblicherweise Angaben über die Tabletten enthält, wie beispielsweise Daten darüber, wann welche Tabletten einzunehmen sind. Es ist daher entscheidend, daß diese Angaben entsprechend der Position der Tabletten auf der Deckfolie angebracht sind.The tablets are regularly made of plastic or paper existing thermoformed film, which by means of a cover film is sealed. Located on the cover sheet a printed image, which is usually information about the tablets, such as data about when to take which tablets. It is therefore crucial that this information according to the position the tablets are attached to the cover film.

Wegen der großen Menge der benötigten Blisterverpackungen werden bereits bedruckte Deckfolien sehr großer Länge verwendet. Die Folien befinden sich üblicherweise auf Rollen.Because of the large amount of blister packaging required already printed cover foils of very long lengths are used. The foils are usually on rolls.

Wenngleich auch mit den heute bekannten Drucktechniken eine sehr große Maßgenauigkeit erreicht werden kann, so stellt die positionsgenaue Verbindung der Deckfolie mit der Tiefziehfolie ein großes Problem dar, da sich vorhandene Abweichungen addieren können. Im Laufe der Zeit würde daher die Position des Druckbildes von der erforderlichen Position erheblich abweichen.Although with the printing techniques known today, one very great dimensional accuracy can be achieved, so represents the precise connection of the cover film with the thermoformed film a big problem since there are any deviations can add. Over time, therefore Position of the printed image from the required position deviate significantly.

Um die Deckfolie positionsgenau mit der Tiefziehfolie verbinden zu können, ist das Druckbild bei den bereits vorbedruckten Folien etwas kleiner ausgelegt als es tatsächlich benötigt würde. Die dadurch vorhandene Längendifferenz wird mittels einer sogenannten Reckung ausgeglichen. Die Deckfolie wird durch eine besondere Vorrichtung auf die benötigte Länge gezogen. Dadurch, daß man bewußt eine Abweichung der Länge des Druckbildes in eine bestimmte Richtung erzeugt und diese Abweichung individuell wieder ausgleicht, wird zwar vermieden, daß sich Fertigungstoleranzen kumulieren, jedoch ist ein derartiges Verfahren sehr aufwendig.To position the cover film with the thermoforming film To be able to, the printed image is already in the pre-printed Slides designed a bit smaller than it actually is would be needed. The resulting difference in length becomes balanced by a so-called stretching. The cover sheet is required by a special device Length drawn. By consciously making a deviation the length of the printed image in a certain direction and compensates for this deviation individually, it is avoided that manufacturing tolerances accumulate, however, such a method is very complex.

Es ist zwar eine Druckvorrichtung zum Bedrucken von Etiketten, welche sich auf einem Endlosträger befinden, bekannt, bei der der Druckvorgang durch einen Sensor ausgelöst wird, welcher die Anfangskante eines Etiketts detektiert. Da der Druckvorgang jeweils durch ein sich auf dem Träger befindliches Etikett ausgelöst wird, ist die Position des Druckbildes abhängig von der Position des Etiketts auf der Folie. Bei Verwendung einer derartigen Druckvorrichtung zum Bedrucken von Blisterverpackungen würde sich daher aber dasselbe Problem ergeben, wie bei bereits vorher bedruckten Folien. Although it is a printing device for printing labels, which are on an endless carrier, known where the printing process is triggered by a sensor, which detects the beginning edge of a label. Since the Printing process by one on the carrier The label is triggered is the position of the print image depending on the position of the label on the Foil. When using such a printing device for Printing blister packs would therefore be the same Problems arise, as with previously printed Foils.

Aus der DE 195 00 169 A1 ist ein Drucksystem für doppelseitiges Bedrucken von Endlospapier bekannt, bei dem zwischen einem ersten und zweiten Drucker eine Zwischenpufferanordnung zum Absorbieren der Differenz der Papiervorschubgeschwindigkeit zwischen dem ersten und zweiten Drucker angeordnet ist. Ein Detektierteil detektiert den Retentionsbetrag in der Zwischenpufferanordnung. Ein Drucker-Controller stoppt den Druck und den Vorschub durch den ersten Drucker, wenn der Retentionsbetrag einen ersten Wert überschreitet. Der Drucker-Controller nimmt den Druck und den Papiervorschub durch den ersten Drucker wieder auf, wenn der Retentionsbetrag einen zweiten Wert unterschreitet. Der Druck und der Papiervorschub erfolgen dann so lange, bis der Retentionsbetrag den ersten Wert wieder überschreitet.DE 195 00 169 A1 describes a printing system for double-sided printing of Continuous paper is known in which between a first and a second printer Intermediate buffer arrangement for absorbing the difference in paper feed speed is arranged between the first and second printer. On Detection part detects the amount of retention in the intermediate buffer arrangement. On Printer controller stops printing and feeding through the first printer, if the retention amount exceeds a first value. The printer controller resumes printing and paper feeding through the first printer, if the retention amount falls below a second value. The pressure and the The paper is then fed until the retention amount reaches the first value again exceeds.

Des weiteren ist aus der DE 34 20 304 A1 eine Vorrichtung bekannt, welche mehrere autonome Druckeinheiten aufweist, welche in der Lage sind, verschiedene Druckvorgänge auszuführen. Des weiteren weist die Vorrichtung eine oder mehrere selbständige Einheiten zur Fertigbearbeitung auf, welche in der Lage sind, verschiedene Fertigbearbeitungen wie Perforationen oder Schnitte auszuführen. Darüber hinaus weist die Vorrichtung Einrichtungen zur wahlweisen Steuerung von jeder dieser selbständigen Einheiten auf, welche die selbständigen Einheiten derart steuern, daß der Druck und/oder die Fertigbearbeitung der Funktion der Arbeit, welche von dem Schnelldrucker ausgeführt wird, angepaßt ist. Die Einrichtungen zur wahlweisen Steuerung weisen Sensoren auf, welche auf dem zu bedruckenden Träge angebrachte Markierungen erkennen, welche durch den Schnelldrucker ausgeführt werden. Furthermore, a device is known from DE 34 20 304 A1, which has several autonomous printing units, which are able to different To perform printing. Furthermore, the device has one or more independent units for finishing, which are able perform various finishing operations such as perforations or cuts. In addition, the device has devices for the optional control of each of these independent units, which the independent units so control that printing and / or finishing the function of the work, which is carried out by the fast printer is adapted. The facilities for optional controls have sensors which are based on the print Recognize sluggish markings, which by the fast printer be carried out.

Es ist Aufgabe der Erfindung, eine eingangs genannte Druckvorrichtung anzugeben, mittels der ein Druckbild positionsgenau auf eine Folie aufgebracht werden kann, wobei eine Kumulierung eines Fehlers ausgeschlossen sein soll.The object of the invention is a printing device mentioned at the beginning specify by means of which a printed image is in position can be applied to a film, one Accumulation of an error should be excluded.

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 results from the features of characterizing part of claim 1. Advantageous further developments the invention emerge from the subclaims.

Gemäß der Erfindung ist ein Drucker vorgesehen, welcher einen Eingang zum Auslösen eines positionsgenauen Druckvorgangs hat, sowie ein Sensor, welcher immer dann an seinem Ausgang ein Signal abgibt, wenn die Länge der Folie zwischen der Trennvorrichtung und der dem Anfang eines zu bedruckenden Abschnitts entsprechenden Stelle einem vorbestimmten Vielfachen der zweiten vorbestimmten Länge entspricht, wobei der Ausgang des Sensors mit dem Eingang des Druckers verbunden ist. According to the invention, a printer is provided which an input for triggering a positionally accurate printing process has, as well as a sensor, which then always on his Output emits a signal when the length of the slide between the separator and the beginning of one too corresponding to the printing section a predetermined Corresponds to multiples of the second predetermined length, the output of the sensor with the input of the Printer is connected.

Hierdurch wird 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. Somit sind selbst relativ große Abweichungen in der Regel unschädlich, da die bei einem Abschnitt vorhandene Abweichung keinen Einfluß auf den Anfang des nächsten zu bedruckenden Abschnitts hat. Desgleichen wirkt sich ein Schlupf der Folie nicht aus.This ensures that the beginning of one to be printed Section of the slide is always redefined. By constantly redefining the beginning of a print Section may be an existing one Do not add errors. So there are even relatively large deviations usually harmless since the one section existing deviation does not affect the beginning of the next section to be printed. The same a slip of the film has no effect.

Entspricht das vorbestimmte Vielfache der zweiten vorbestimmten Länge beispielsweise dem Zehnfachen der Länge eines zu bedruckenden Abschnitts und ist die Länge der Folie zwischen der Trennvorrichtung und der Stelle der Folie, an der der Drucker bei vorhandenem Eingangssignal den Anfang des Druckbildes setzen würde, weniger als dem Zehnfachen der zweiten vorbestimmten Länge, so gibt der Sensor kein Signal ab, das heißt, ein Druckvorgang wird nicht gestartet. Wird nun weitere Folie durch den Drucker transportiert, so daß sich die Länge zwischen der Trennvorrichtung und dem Drucker vergrößert, so wird einmal der Punkt erreicht, wo die Länge der Folie zwischen der Trennvorrichtung und der Stelle, an der der Drucker bei vorhandenem Eingangssignal sein Druckbild beginnen würde, dem Zehnfachen der zweiten vorbestimmten Länge entspricht. In dem Augenblick gibt der Sensor ein Ausgangssignal an den Drucker ab. Das heißt, der Drucker beginnt seinen Druckvorgang genau an der Stelle der Folie, die dem Anfang eines zu bedruckenden Abschnitts entspricht.Corresponds to the predetermined multiple of the second predetermined Length, for example, ten times the length of a section to be printed and is the length of the Foil between the separator and the location of the Foil attached to the printer when there is an input signal would set the beginning of the printed image, less than that Ten times the second predetermined length, the gives Sensor no signal, that is, a printing process not started. Now there is additional film through the printer transported so that the length between the separator and the printer is enlarged, so the Point reached where the length of the film between the separator and the location where the printer is present Input signal his print image would start ten times corresponds to the second predetermined length. By doing The sensor immediately outputs an output signal to the Printer. That is, the printer starts printing exactly at the point of the slide that is the beginning of one corresponding to the printing section.

In besonders vorteilhafter Weise wird als Drucker ein elektrophotographischer Drucker, wie beispielsweise ein Laser- oder LED-Drucker verwendet. Die Anordnung arbeitet jedoch genauso vorteilhaft, wenn ein Ionentransferdrucker oder Thermotransferdrucker oder ähnliches verwendet wird. A printer is used in a particularly advantageous manner electrophotographic printer such as a Laser or LED printer used. The arrangement works but just as beneficial if using an ion transfer printer or thermal transfer printer or the like is used.

Entscheidend für die Auswahl des Druckers ist, daß der Drucker seinen Druckvorgang positionsgenau durchführen kann und die Positionierung über ein Eingangssignal gesteuert werden kann.It is crucial for the selection of the printer that the Printer can perform its printing process precisely and controlled the positioning via an input signal can be.

Bei einer besonderen Ausführungsform der Erfindung, welche insbesondere dann vorteilhaft ist, wenn der Vorrichtung bedruckte Abschnitte diskontinuierlich entnommen werden, ist vorgesehen, daß der Sensor ein optischer Sensor ist, der die Position einer Tänzerwalze detektiert, welche beweglich derart angeordnet ist, daß die Position der Tänzerwalze von der Länge der Folie zwischen der Trennvorrichtung und dem Drucker abhängt. Dadurch wird eine sehr große Genauigkeit erreicht.In a particular embodiment of the invention, which is particularly advantageous if the device is printed Sections are taken discontinuously provided that the sensor is an optical sensor which detects the position of a dancer roller, which is movable is arranged so that the position of the dancer roller the length of the film between the separator and the Printer depends. This will make it very accurate reached.

Wird der Druckvorrichtung mit einer Geschwindigkeit, die einem Vielfachen der Geschwindigkeit entspricht, mit der die Folie den Drucker passiert, Folie entnommen, so verkürzt sich die Länge der Folie zwischen der Trennvorrichtung und dem Drucker. Die Verringerung der Folienlänge dauert solange an, wie der Druckvorrichtung mit erhöhter Geschwindigkeit Folie entnommen wird. Stoppt die Entnahme, das heißt wird der Druckvorrichtung vorübergehend keine Folie entnommen, kehrt sich der Vorgang um. Durch den kontinuierlichen Druckvorgang vergrößert sich die Länge der Folie zwischen der Trennvorrichtung und dem Drucker.Will the printing device at a speed that is a multiple of the speed at which the film passes the printer, film is removed, so shortened the length of the film between the separator and the printer. The reduction in film length lasts as long as the printing device at increased speed Foil is removed. Stops the removal, that is, the printing device temporarily becomes none Removed the film, the process is reversed. Through the continuous Printing process increases the length of the Foil between the separator and the printer.

Zum Ausgleich der sich verändernden Länge der Folie zwischen der Trennvorrichtung und dem Drucker ist die Tänzerwalze vorgesehen. Die Tänzerwalze befindet sich in einer Schlaufe der Folie, welche durch eine Umlenkung der Folie um die Tänzerwalze erzeugt wird. Verkürzt sich die Lange der Folie, wird die Tänzerwalze in Richtung Schlaufenöffnung bewegt. Vergrößert sich die Länge der Folie, bewegt sich die Tänzerwalze von der Öffnung der Schlaufe weg, wodurch der Weg der Folie um die Tänzerwalze vergrößert ist. To compensate for the changing length of the film between the separator and the printer is the dancer roller intended. The dancer roll is in one Loop of the film, which is caused by a deflection of the film is generated around the dancer roll. The length is shortened of the film, the dancer roll is towards the loop opening emotional. The length of the film increases, moves the dancer roller away from the opening of the loop, causing the path of the film around the dancer roller is enlarged.

Ist der Sensor an der Stelle der Vorrichtung angeordnet, an der sich die Tänzerwalze befindet, wenn der weg, längs dem sich die Folie zwischen der Trennvorrichtung und der dem Anfang eines zu bedruckenden Abschnitts entsprechenden Stelle erstreckt, beispielsweise dem Zehnfachen der zweiten vorbestimmten Länge entspricht, gibt der Sensor ein Signal an den Drucker ab. Hierdurch wird an der erwünschten Stelle auf der Folie ein Druckbild erzeugt.If the sensor is arranged at the location of the device, on which is the dancer roller, if the path is along the the film between the separator and the beginning a position corresponding to the section to be printed extends, for example ten times the second predetermined Corresponds to the length, the sensor emits a signal the printer. This will take you to the desired location creates a print image on the film.

Die Genauigkeit könnte noch dadurch erhöht werden, daß die Längenänderung der sich zwischen der Trennvorrichtung und dem Drucker befindlichen Folie dadurch erfaßt wird, daß um die Tänzerwalze beispielsweise ein Seil geschlungen wird, welches an seinem der Trennvorrichtung zugewandten Ende fixiert ist und an seinem dem Drucker zugewandten Ende beweglich befestigt ist. In zweckmäßiger Weise nimmt das Seil denselben Verlauf wie die Folie. Da das Seil an einem Ende unbeweglich befestigt ist, ist die Position des beweglich angeordneten Seilendes abhängig von der Position der Tänzerwalze. Somit läßt sich am beweglich angeordneten Ende des Seils dieselbe Längenänderung feststellen, die bei dem sich zwischen der Trennvorrichtung und dem Drucker befindlichen Teil der Folie auftritt. Da das beweglich angeordnete Seilende den doppelten Weg zurücklegt, den die Tänzerwalze zurücklegt, wäre bei einem am beweglichen seilende angeordneten Sensor die Auflösung doppelt so groß wie bei dem an der Tänzerwalze angeordneten Sensor, was sich vorteilhaft auf die Genauigkeit auswirkt.The accuracy could be increased by the fact that Change in length between the separator and the film located in the printer is detected in that the dancer roller is looped, for example, a rope, which at its end facing the separating device is fixed and movable at its end facing the printer is attached. Appropriately, the rope takes off the same course as the slide. Because the rope at one end is immovably attached, the position of the is movable arranged rope end depending on the position of the dancer roller. Thus, at the movably arranged end of the Seils notice the same change in length as in the between the separator and the printer Part of the slide occurs. Because the movably arranged rope end cover the double distance that the dancer roller covers, would be arranged on a movable rope end Sensor has twice the resolution of that on the Dancer roller arranged sensor, which is advantageous on affects the accuracy.

Zur Einstellung der Position der Tänzerwalze ist eine Offsetwalze vorgesehen, welche derart angeordnet ist, daß durch sie die Länge der Folie zwischen der Trennvorrichtung und dem Drucker verändert werden kann. Dies ist dann von Vorteil, wenn sich das Format des Druckbildes beziehungsweise des zu bedruckenden Abschnitts ändert, da hierdurch die Länge der Folie zwischen der Trennstelle und dem Drucker verändert werden muß. Um die Position der Tänzerwalze trotz der veränderten Länge zwischen der Trennvorrichtung und dem Drucker unverändert zu lassen, wird die Offsetwalze soweit verschoben, daß die Länge der sich zwischen der Trennvorrichtung und dem Drucker 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.An offset roller is used to adjust the position of the dancer roller provided which is arranged such that through it the length of the film between the separator and the printer can be changed. Then this is from Advantage if the format of the printed image or of the section to be printed changes because of this the length of the film between the separation point and the Printer needs to be changed. To the position of the dancer roller despite the changed length between the separator and leaving the printer unchanged becomes the offset roller shifted so far that the length of between the separator and the printer foil in turn a predetermined multiple of the second, now changed, predetermined length corresponds when the Dancer roll is located opposite the sensor. This will Avoid changing the position of the printer must if the section length changes.

Eine weitere vorteilhafte Ausgestaltung der Erfindung sieht vor, daß eine Vorrichtung vorgesehen ist, mittels der die Druckergeschwindigkeit gesteuert wird. Als besonders vorteilhaft hat sich bei der Verwendung einer Tänzerwalze ein Näherungssensor herausgestellt, welcher in Abhängigkeit der Entfernung der Tänzerwalze von einer Rampe des Sensors ein entsprechendes Signal ausgibt. Da die Tänzerwalze bei der beschriebenen diskontinuierlichen Entnahme von Folie aus der Druckvorrichtung ständig in Bewegung ist, wird in bevorzugter Weise ein Mittelwert des sich aufgrund der Rampe des Näherungssensors ebenfalls ständig verändernden Sensor-Ausgangssignals gebildet. Die Offsetwalze wird so eingestellt, daS der Punkt, um den die Tänzerwalze hin- und herpendelt, sich bei üblicher Abschnittslänge und Entnahmerate etwa in der Mitte der Rampe des Sensors befindet. Die Steuerung ist darüber hinaus zweckmäßigerweise so ausgebildet, daß die Größe des Sensorsignals sowohl nach oben als auch nach unten begrenzt ist. Hierdurch wird die Geschwindigkeit des Druckers ebenfalls durch ein Maximum und ein Minimum begrenzt. A further advantageous embodiment of the invention provides before that a device is provided by means of which Printer speed is controlled. To be particularly advantageous has become familiar with the use of a dancer roller Proximity sensor highlighted, which depending on the Removal of the dancer roller from a ramp of the sensor outputs the corresponding signal. Since the dancer roll at described discontinuous removal of film the printing device is in constant motion is preferred Way an average of the due to the ramp of the Proximity sensor also constantly changing sensor output signal educated. The offset roller is set so the point around which the dancer roller swings back and forth approx. in at the usual section length and removal rate the middle of the ramp of the sensor. The control is moreover expediently designed so that the Size of the sensor signal both upwards and downwards is limited below. This will speed up the Printer also limited by a maximum and a minimum.

Erhöht sich die Entnahmerate oder die Länge der bedruckten Abschnitte, wird der Druckvorrichtung pro Zeiteinheit mehr Folie entnommen als vorher. Da der Drucker zunächst mit konstanter Geschwindigkeit weiterdruckt, verkürzt sich die Länge der Folie zwischen der Trennvorrichtung und dem Drucker. Hierdurch bewegt sich der Punkt, um den die Tänzerwalze pendelt, nach oben, wodurch sich die Geschwindigkeit des Druckers erhöht. Hat sich die Druckergeschwindigkeit an die neue Abschnittslänge und/oder Entnahmerate angepaßt, pendelt die Tänzerwalze um einen Punkt, der sich nunmehr im oberen Bereich der Rampe des Näherungssensors befindet. Das heißt, durch den veränderten Pendel-Mittelpunkt gibt der Näherungssensor ein Mittelwert-Signal aus, aufgrund dessen der Drucker mit einer höheren Geschwindigkeit druckt. Derselbe Vorgang findet mit umgekehrten Vorzeichen statt, wenn sich die Abschnittslänge verkleinert und/oder die Entnahmerate verringert. In dem Fall pendelt die Tänzerwalze um einen Punkt des Näherungssensors, der sich im unteren Bereich der Rampe befindet.The removal rate or the length of the printed increases Sections, the printing device becomes more per unit of time Foil removed than before. Since the printer initially with constant Printing speed continues, the length is shortened the film between the separator and the printer. This moves the point around which the dancer roll commutes upwards, which increases the speed of the Printer increased. Has the printer speed matched the adjusted new section length and / or removal rate, commutes the dancer roller around a point that is now in the upper area of the ramp of the proximity sensor. The means that the changed pendulum center gives the Proximity sensor a mean value signal, based on that the printer is printing at a higher speed. The same The process takes place with the opposite sign if the section length decreases and / or the removal rate decreased. In this case the dancer roll swings a point of the proximity sensor that is in the lower range the ramp is located.

Da sich durch den veränderten Pendel-Mittelpunkt der Tänzerwalze die Scheitelpunkte der Pendelbewegung der Tänzerwalze auch verändern, muß der Sensor in seiner Position ebenfalls verändert werden. Der Sensor muß soweit verschoben werden, daß er wiederum dann ein Ausgangssignal abgibt, wenn die Länge der sich zwischen der Trennvorrichtung und dem Drucker befindlichen Folie wiederum einem Vielfachen der zweiten, gegebenenfalls veränderten, vorbestimmten Länge eines bedruckten Abschnitts entspricht.Because of the changed pendulum center of the dancer roller the vertices of the dancer roller sway also change, the sensor must also change its position to be changed. The sensor must be moved so far that it in turn emits an output signal when the Length of between the separator and the The foil in the printer is a multiple of that second, possibly changed, predetermined length corresponds to a printed section.

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 a particular embodiment with reference on the drawing.

Es zeigt die einzige Figur eine schematische Anordnung einer erfindungsgemäßen Druckvorrichtung.The only figure shows a schematic arrangement a printing device according to the invention.

Bei einer erfindungsgemäßen Druckvorrichtung wird eine zu bedruckende Folie 1, welche von einer Rolle 8 abgewickelt wird, durch einen Drucker 2 geführt. Hinter dem Drucker 2 wird die Folie 1 um eine erste Umlenkrolle 9a umgelenkt. Hinter der ersten Umlenkrolle 9a umschlingt die Folie 1 S-förmig eine Tänzerwalze 6 sowie eine Offsetwalze 5. Die Tänzerwalze 6 sowie die Offsetwalze 5 befinden sich jeweils im Grund von Schlaufen, welche durch den Verlauf der Folie 1 gebildet werden. Hinter der Offsetwalze 5 wird die Folie 1 um eine zweite Umlenkwalze 9b umgelenkt. Hinter der zweiten Umlenkwalze 9b befindet sich eine Entnahmevorrichtung 10, welche Folie 1 auf diskontinuierliche Weise der Druckvorrichtung entnimmt. Bei der Entnahmevorrichtung 10 handelt es sich um eine herkömmliche Vorrichtung, welche wiederholt einen Teil der Folie 1 aufnimmt und durch eine Pendelbewegung aus der Druckvorrichtung zieht.In a printing device according to the invention, one becomes printing film 1, which is unwound from a roll 8 is passed through a printer 2. Behind the printer 2 the film 1 is deflected around a first deflection roller 9a. The film 1 wraps around the first deflecting roller 9a S-shaped a dancer roller 6 and an offset roller 5. Die The dancer roller 6 and the offset roller 5 are located in each case in the bottom of loops, which through the course of the film 1 are formed. The film is behind the offset roller 5 1 deflected around a second deflecting roller 9b. Behind the second Deflection roller 9b is a removal device 10, which slide 1 in a discontinuous manner Removed printing device. With the removal device 10 is a conventional device, which repeatedly takes up part of the film 1 and through a Pendulum movement pulls out of the printing device.

Vor der Entnahmevorrichtung 10 ist eine Trennvorrichtung 4 angeordnet. Die Trennvorrichtung 4 kann dergestalt ausgebildet sein, daß sie die Folie 1 zerschneidet. Jedenfalls wird durch die Trennvorrichtung 4 der Anfang eines zu bedruckenden Bereichs festgelegt. Nach dem Anfang des Bereichs richtet sich der Beginn des vom Drucker 2 erzeugten Druckbildes.In front of the removal device 10 is a separating device 4 arranged. The separating device 4 can be designed in this way be that it cuts the film 1. Anyway through the separator 4 the beginning of a printable Range set. Judging by the beginning of the area the beginning of the print image generated by printer 2.

Die Tänzerwalze 6 und die Offsetwalze 5 sind so angeordnet, daß sie gegeneinander zu- und voneinander wegbewegt werden können. Während die Offsetwalze 5 feststellbar ist, ist die Tänzerwalze 6 frei beweglich. The dancer roller 6 and the offset roller 5 are arranged that they are moved towards and away from each other can. While the offset roller 5 can be determined, the Dancer roller 6 freely movable.

Gegenüber der Tänzerwalze 6 ist ein rampenförmig ausgebildeter Näherungssensor 7 angeordnet. Der Näherungssensor 7 ist so ausgebildet beziehungsweise angeordnet, daß sich der Abstand der Tänzerwalze 6 zum Näherungssensor 7 im Verlauf der Bewegung der Tänzerwalze 6 über einen aktiven Bereich stetig verändert. Außerhalb des aktiven Bereichs ist der Abstand der Tänzerwalze 6 vom Näherungssensor 7 konstant.Opposite the dancer roller 6 is a ramp-shaped one Proximity sensor 7 arranged. The proximity sensor 7 is designed or arranged so that the Distance of the dancer roller 6 to the proximity sensor 7 in the course the movement of the dancer roller 6 over an active area constantly changing. Outside the active area is the Distance of the dancer roller 6 from the proximity sensor 7 constant.

Etwa in Höhe des unteren Drittels des aktiven Bereichs des Näherungssensors 7 ist ein Sensor 3 verstellbar angeordnet. Der Sensor 3 ist als Lichtschranke ausgebildet und hat einen Ausgang 3a. Am Ausgang 3a des Sensors 3 erscheint stets dann ein Signal, wenn sich die Tänzerwalze 6 in einer bestimmten Position vor dem Sensor 3 befindet. Zweckmäßigerweise befindet sich die Position bei Druckbildern mittlerer Länge und mittlerer Entnahmerate etwa im unteren Drittel des aktiven Bereichs des Näherungssensors 7. Eine derartige Einstellung kann durch die Offsetwalze 5 bewirkt werden. Der Ausgang 3a des Sensors 3 ist mit dem Eingang 2a des Druckers 2 verbunden. Ändert sich die Länge des das Druckbild enthaltenden Abschnitts, muß der Sensor 3 verstellt werden, so daß er an die veränderte Länge der sich zwischen der Trennvorrichtung 4 und dem Drucker 2 befindlichen Folie angepaßt ist.Approximately the lower third of the active area of the Proximity sensor 7 has an adjustable sensor 3. The sensor 3 is designed and has a light barrier an output 3a. Appears at output 3a of sensor 3 always a signal when the dancer roller 6 in one certain position in front of the sensor 3. Conveniently the position is in the middle of printed images Length and average withdrawal rate in the lower third of the active area of the proximity sensor 7. Such Adjustment can be effected by the offset roller 5. The output 3a of the sensor 3 is connected to the input 2a of the Printer 2 connected. The length of the printed image changes containing section, the sensor 3 must be adjusted be so that it changes the length of the between the separator 4 and the printer 2 film is adjusted.

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 Druckvorrichtung entnommen wird. Die Darstellung in der Figur entspricht etwa dem Zeitpunkt, zu dem die Entnahmevorrichtung 10 beginnt, der Druckvorrichtung Folie 1 zu entnehmen.During the time that the removal device 10 itself to accommodate a portion of the film 1 in a Rest position is not from the printing device Slide 1 removed. With a continuous run of Slide 1 through the printer 2 increases the length of the Foil 1, which is between the separator 4 and the printer 2. This lowers the dancer roller 6 down. The dancer roller 6 lowers as long down until through the removal device 10 slide 1 is removed from the printing device. The representation in the figure corresponds approximately to the time at which the removal device 10 begins to the printing device slide 1 remove.

Durch den Entnahmevorgang wird der Druckvorrichtung Folie 1 mit einer Geschwindigkeit entnommen, die einem Vielfachen der Geschwindigkeit entspricht, mit der die Folie 1 den Drucker 2 passiert. Da der Druckvorrichtung 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 Drucker 2. Durch die Verkürzung der Länge wird die Tänzerwalze 6 nach oben bewegt.Through the removal process, the printing device becomes film 1 taken at a speed that is a multiple corresponds to the speed at which the film 1 Printer 2 happens. Since the printing device has more film 1 is removed as transported by the printer 2, shortens the length of the film 1 between the separator 4 and the printer 2. By shortening the Length the dancer roller 6 is moved upwards.

In dem Augenblick, wo die Tänzerwalze 6 die Position hat, in der 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 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.The moment the dancer roller 6 is in the position in which the sensor 3 sends a signal via its output 3a outputs the input 2a of the printer 2, the length is Slide 1 between the separator 4 and the beginning a position corresponding to a section to be printed, for example ten times the length of a printable Section. Because the printer 2 is just at the moment Receives signal for printing, the print image is sent to the Start of a section to be printed. It understands that if a route depends on the type of printer must be taken into account, for example the part of the The circumference of an image roller corresponds to that between the Describe the image roller and the imprint of the image roller the slide 1 is located, this part by a corresponding Offset compensation must be taken into account.

Die Offsetwalze 5 ist so angeordnet, daß die durch die diskontinuierliche Entnahme von Folie 1 aus der Druckvorrichtung vorhandene Pendelbewegung der Tänzerwalze 6 bei mittlerer Länge des das Druckbild aufnehmenden Abschnitts und mittlerer Entnahmerate um die Mitte des aktiven Bereichs des Näherungssensors 7 stattfindet. The offset roller 5 is arranged so that the discontinuous Removal of film 1 from the printing device existing pendulum movement of the dancer roller 6 at medium Length of the section receiving the printed image and average removal rate around the center of the active area of the proximity sensor 7 takes place.

Vergrößert sich die erste vorbestimmte Länge D des Druckbildes und damit die zweite vorbestimmte Länge L des zu bedruckenden Abschnitts, so muß sich der Teil der Folie 1, welcher sich zwischen der Trennvorrichtung 4 und dem Drucker 2 befindet, ebenfalls vergrößern, da die Länge dieses Teils immer einem vorbestimmten Vielfachen, wie beispielsweise dem Zehnfachen der zweiten vorbestimmten Länge L entsprechen muß. Die Tänzerwalze 6 würde hierdurch aus dem Bereich des Näherungssensors 7 gelangen. Die Offsetwalze 5 muß daher soweit nach oben verschoben werden, daß die durch einen größeren zu bedruckenden Abschnitt vergrößerte Pendelbewegung der Tänzerwalze 6 wiederum um einem Punkt in der Mitte des aktiven Bereichs stattfindet.The first predetermined length D of the printed image increases and thus the second predetermined length L of the to be printed Section, the part of the film 1, which is between the separator 4 and the Printer 2 is located, also increase the length of this Partly always a predetermined multiple, such as ten times the second predetermined length L must correspond. The dancer roller 6 would thereby reach the area of the proximity sensor 7. The offset roller 5 must therefore be moved up so far that which enlarged by a larger section to be printed Pendulum movement of the dancer roller 6 in turn by one Point takes place in the middle of the active area.

Da der Sensor 3 immer dann an seinem Ausgang 3a ein Signal abgeben muß, wenn die Länge der Folie 1, welche sich zwischen der Trennvorrichtung 4 und dem Drucker 2 befindet, beispielsweise dem Zehnfachen der zweiten vorbestimmten Länge L entspricht, ist der Sensor 3 zweckmäßigerweise beweglich angeordnet. Er kann daher gegebenenfalls an den unterschiedlichen Weg der Tänzerwelle 6 angepaßt werden.Since the sensor 3 always has a signal at its output 3a must give up if the length of the film 1, which is between the separator 4 and the printer 2, for example ten times the second predetermined Corresponds to length L, the sensor 3 is expediently movable arranged. He can therefore, if necessary, to the different way of the dancer shaft 6 can be adapted.

Wenngleich die vorliegende Erfindung auch anhand einer Druckvorrichtung beschrieben wurde, aus der Folie 1 diskontinuierlich entnommen wird, so kann sie doch in gleicher Weise bei einer kontinuierlichen Entnahme von Folie 1 aus einer Druckvorrichtung angewendet werden. Da bei einer kontinuierlichen Entnahme von Folie 1 aus einer Druckvorrichtung gegebenenfalls auf die Tänzerwalze 6 verzichtet werden kann, würde sich ein anderer Aufbau der Druckvorrichtung ergeben. Wesentlich ist jedoch, daß ein Sensor 3 vorhanden ist, der immer dann an seinem Ausgang ein Signal abgibt, wenn die Länge der sich zwischen der Trennvorrichtung 4 und dem Drucker 2 befindlichen Folie 1 einem Vielfachen der zweiten vorbestimmten Länge des zu bedruckenden Abschnitts entspricht.Although the present invention is also based on a Printing device was described, discontinuously from the film 1 is removed, it can still in the same Way with a continuous removal of film 1 from a printing device can be applied. Because with a continuous Removal of film 1 from a printing device if necessary, the dancer roller 6 can be dispensed with could be a different structure of the printing device surrender. However, it is essential that a sensor 3 is present is that always emits a signal at its output, if the length of the between the separator 4 and the printer 2 located film 1 a multiple of second predetermined length of the portion to be printed corresponds.

Claims (4)

  1. An apparatus for printing a marking-free endless sheet (1) with print images of a first predetermined length (D) by a printer (2), wherein after the printing operation the endless sheet (1) is divided into portions of a second predetermined length (L) by means of a separating device (4) and the print images have to be applied to-the endless sheet (1) in precise positional relationship in relation to the separation locations (T) between the portions, and having a sensor (3) for controlling the printing operation in dependence on the length of the endless sheet (1) between the separating device (4) and the printer (2), wherein the forward feed movement of the endless sheet (1) occurs through the printer (2) even without a printing operation and the printer (2) is activated to implement a printing operation which involves only a single print image by an output signal of the sensor (3) whenever the length of the endless sheet (1) between the separating device (4) and the printer (2) is a predetermined multiple of the second predetermined length (L).
  2. An apparatus according to claim 1 characterised in that the sensor (3) is an optical sensor which detects the position of a dancer roller (6) which is arranged movably in such a way that the position of the dancer roller (6) depends on the length of the endless sheet (1) between the separating device (4) and the printer (2).
  3. An apparatus according to claim 1 or claim 2 characterised in that there is provided an offset roller (5) by means of which the length of the endless sheet (1) between the separating device (4) and the printer (2) can be altered.
  4. An apparatus according to one of claims 1 to 3 characterised in that there is provided a device (7) by means of which the printer speed is controlled.
EP96925637A 1995-07-15 1996-07-15 Device for positionally exact printing of continuous sheeting Expired - Lifetime EP0839092B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19525713 1995-07-15
DE19525713A DE19525713C1 (en) 1995-07-15 1995-07-15 Device for printing marking-free endless foil
PCT/DE1996/001323 WO1997003837A1 (en) 1995-07-15 1996-07-15 Device for positionally exact printing of continuous sheeting

Publications (2)

Publication Number Publication Date
EP0839092A1 EP0839092A1 (en) 1998-05-06
EP0839092B1 true EP0839092B1 (en) 1999-03-17

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EP96925637A Expired - Lifetime EP0839092B1 (en) 1995-07-15 1996-07-15 Device for positionally exact printing of continuous sheeting

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US (1) US5964151A (en)
EP (1) EP0839092B1 (en)
JP (1) JP3357068B2 (en)
AT (1) ATE177687T1 (en)
AU (1) AU704698B2 (en)
CA (1) CA2226888C (en)
DE (2) DE19525713C1 (en)
DK (1) DK0839092T3 (en)
ES (1) ES2129981T3 (en)
WO (1) WO1997003837A1 (en)

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Also Published As

Publication number Publication date
DK0839092T3 (en) 1999-10-11
JP3357068B2 (en) 2002-12-16
EP0839092A1 (en) 1998-05-06
DE59601464D1 (en) 1999-04-22
ES2129981T3 (en) 1999-06-16
WO1997003837A1 (en) 1997-02-06
JPH11509148A (en) 1999-08-17
CA2226888C (en) 2002-01-22
AU704698B2 (en) 1999-04-29
CA2226888A1 (en) 1997-02-06
DE19525713C1 (en) 1996-11-14
ATE177687T1 (en) 1999-04-15
AU6610396A (en) 1997-02-18
US5964151A (en) 1999-10-12

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