EP3705295B1 - Procédé de fonctionnement d'une imprimante jet d'encre continu à surveillance optique de la qualité d'impression, imprimante à jet d'encre continu à surveillance optique de la qualité d'impression et procédé d'apprentissage d'une imprimante à jet d'encre continu à surveillance optique de la qualité d'impression - Google Patents

Procédé de fonctionnement d'une imprimante jet d'encre continu à surveillance optique de la qualité d'impression, imprimante à jet d'encre continu à surveillance optique de la qualité d'impression et procédé d'apprentissage d'une imprimante à jet d'encre continu à surveillance optique de la qualité d'impression Download PDF

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Publication number
EP3705295B1
EP3705295B1 EP19161144.1A EP19161144A EP3705295B1 EP 3705295 B1 EP3705295 B1 EP 3705295B1 EP 19161144 A EP19161144 A EP 19161144A EP 3705295 B1 EP3705295 B1 EP 3705295B1
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EP
European Patent Office
Prior art keywords
bitmap
printed image
cij printer
substrate
printer
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.)
Active
Application number
EP19161144.1A
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German (de)
English (en)
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EP3705295A1 (fr
Inventor
Klaus Specker
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.)
Paul Leibinger GmbH and Co KG
Original Assignee
Paul Leibinger GmbH and Co KG
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
Application filed by Paul Leibinger GmbH and Co KG filed Critical Paul Leibinger GmbH and Co KG
Priority to EP19161144.1A priority Critical patent/EP3705295B1/fr
Priority to US17/436,437 priority patent/US11858267B2/en
Priority to CN201980093684.5A priority patent/CN113543977B/zh
Priority to JP2021552743A priority patent/JP7332707B2/ja
Priority to PCT/EP2019/084488 priority patent/WO2020177912A1/fr
Publication of EP3705295A1 publication Critical patent/EP3705295A1/fr
Application granted granted Critical
Publication of EP3705295B1 publication Critical patent/EP3705295B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/07—Ink jet characterised by jet control
    • B41J2/12—Ink jet characterised by jet control testing or correcting charge or deflection
    • 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
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/07—Ink jet characterised by jet control
    • B41J2/075—Ink jet characterised by jet control for many-valued deflection
    • 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
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/07—Ink jet characterised by jet control
    • B41J2/125—Sensors, e.g. deflection sensors

Definitions

  • Inkjet printers are a popular class of printers.
  • a family of this class which is particularly suitable for industrial applications and has therefore achieved a high degree of acceptance in this field, are the so-called continuous inkjet printers (CIJ printers).
  • CIJ printers continuous inkjet printers
  • a continuous inkjet printer prints with an ink that contains a variable component of solvent. Accordingly, there is a mixing tank in which solvent from a solvent tank and the concentrated ink from an ink tank are mixed together to obtain the ink used for printing.
  • solvent is used hereinafter, it means the liquid used for printing; the term “concentrated ink” is used for the liquid provided in the ink tank.
  • the ink is fed under pressure to a nozzle on the print head, where the drops required for the actual printing process are created from the ink jet according to the basic principle of Rayleigh's decomposition of laminar liquid jets.
  • the formation of drops and in particular the size of the drops is controlled by a modulation which is impressed on the ink jet, for example by suitably excited piezo elements.
  • the droplets thus produced are electrically charged in a suitable manner and set on a desired trajectory by deflection electrodes directed, which leads them either to a desired position of a substrate to be printed or, if no printing process is to take place, interception at the print head, for example on a catcher tube, and recycling of the ink droplet, ie its return to the mixing tank, allowed.
  • the element to be printed e.g. a letter or a number
  • a matrix or bitmap of ink drops e.g. in many cases by a 7x5 matrix, whereby one dimension, i.e. lines or Columns of the matrix or bitmap are realized and the other dimension is realized by a material feed of the material to be printed.
  • the CIJ printer therefore usually prints a sequence of so-called "strokes", i.e. rows of ink droplets arranged side by side; In its controller, the character to be displayed is converted into a matrix or bitmap corresponding to the resolution, which is then processed line by line or column by column.
  • an essential goal is to ensure that the ink drops land in the right place on the substrate to be printed as reproducibly as possible by activating the deflection electrodes, so that the print image on a given substrate is neither distorted nor does the position of the print image change significantly on substrates that are printed one after the other becomes.
  • Such significant changes can occur as a result of fluctuations in operating parameters, and it is desirable to determine them as quickly as possible in order to be able to produce the desired print image again by appropriately adjusting the settings on the one hand and on the other hand to pull products that have misprints out of the production line in good time to be able to
  • a known way of approaching this goal is to carry out camera monitoring of the printed image, with the camera preferably being in signal communication with the CIJ printer, so that data determined by the camera and images recorded can be shown on a display of the CIJ printer .
  • the time interval between two consecutive printing processes, in which different copies of the product to be printed are printed is often very short, so that the aim is to identify misprints as quickly as possible in order to reduce the number of defective prints printed products as low as possible.
  • a further significant difficulty with camera monitoring of the printed image is that a learning process must be carried out, at least if this is to be (also) automated.
  • the object of the invention is therefore to improve CIJ printers with optical monitoring, in particular with regard to the reaction time during monitoring and/or with regard to the time required for teaching the optical monitoring system.
  • the pattern to be recognized or checked is much simpler, which makes pattern recognition easier and more reliable and reduces the computing time and hardware requirements.
  • the verification rate is significantly increased, so that an error can be detected more quickly.
  • At least one control signal for sequentially driving charging electrodes and/or deflection electrodes of the CIJ printer is used in the automated comparison of the bitmap of the desired print image and the captured with the optical monitoring means, applied to the substrate print image to determine the expected print image of the respective row or column.
  • At least one further control signal is used for the sequential activation of charging electrodes and/or deflection electrodes of the CIJ printer during the automated comparison of the bitmap of the desired print image and the print image recorded with the optical monitoring means and applied to the substrate is used to determine the expected print image of the respective row or column.
  • this control signal can be used directly to define a target position for monitoring.
  • the CIJ printer has multiple processors or one processor with multiple processor cores, with the bitmap of the desired print image being generated on one processor and the control signals for the sequential activation of charging electrodes and/or deflection electrodes being generated of the CIJ printer is controlled and the automated comparison of the bitmap of the desired print image and the print image applied to the substrate detected by the optical monitoring means takes place on the other processor.
  • the image processing does not have a negative impact on the actual printing operation, even if a high level of CPU performance is required.
  • the CIJ printer according to the invention for carrying out the method according to the invention comprises a hydraulic module for ink supply, a droplet generator comprising a nozzle and an oscillator for pressure modulation, which is supplied with ink by the hydraulic module and generates ink droplets, at least one charging electrode for applying a defined charge to the droplet generator generated ink drops, at least one deflection electrode for influencing the trajectory of the ink drops generated by the drop generator, a controller that is set up to transform a bitmap to be printed line by line or column by column into a sequence of control signals with which the charging electrode and/or the deflection electrode be controlled so that an image of this row or column is formed from drops of a droplet sequence on a substrate to be printed, and an optical monitoring means, which can be embodied in particular as a CCD camera, for monitoring the image formed on the substrate to be printed.
  • a controller that is set up to transform a bitmap to be printed line by line or column by column into a sequence of control signals with which the charging electrode and
  • the CIJ printer has a data processing device that is set up to carry out the step of automated comparison according to one of claims 1 to 5.
  • the CIJ printer has a first processor or a first processor core that is assigned to the controller and has a second processor or processor core that is assigned to the data processing device. In this way, an undesired influencing of the printing speed by the image analyzes to be carried out can be avoided.
  • the controller is in signal communication with the data processing device, so that the respective sequences of control signals or control commands corresponding to these sequences are forwarded from the controller to the data processing device.
  • the former corresponds to analog signal transmission, the latter to digital signal transmission.
  • the CIJ printer in at least one pass, generates a bitmap that contains a sequence of control signals for driving charging electrodes and/or deflection electrodes of the CIJ printer the execution of a stroke is generated, that a real print image of this bitmap is realized by applying ink drops to a substrate to be printed, that an image of the real print image is recorded with the optical monitoring means and evaluated in such a way that the respective reaction to a Control signal for a given stroke on the substrate applied part of the real print image is identified and stored as this stroke or control signal assigned to expected print image.
  • this sequence includes all control signals; but it can also suffice if it only includes specific, distinctive control signals for strokes whose printed image shows specific deviations to be expected.
  • this bitmap can also be generated stroke by stroke, i.e. the CIJ printer sequentially generates all control signals for driving the charging electrodes and/or deflection electrodes of the CIJ printer in at least one run, in order to generate dots or groups of points of the bitmap by applying ink drops to a substrate to be printed, and that the print image applied to the substrate in response to the control signal is recorded with the optical monitoring means and stored as the print image assigned to the control signal.
  • a more complex bitmap is formed from the possible or selected "elementary strokes" and the image of this bitmap recorded by the optical monitoring means is evaluated, while in the second case each stroke is executed and analyzed individually.
  • the advantage of the first approach is that interactions between consecutive strokes can already be taken into account, but the evaluation in the second case may be easier.
  • storage can take place not only as an image file but also in the form of coordinates of camera pixels at which the signal from ink drops is to be expected.
  • a library of in each case at least one image that is assigned to a stroke is created automatically, or a library of ink drop positions to be expected for specific strokes is created.
  • Another advantage is that it is often easier to identify systematic deviations in the individual stroke and correct them if necessary. For example, if the medium to be printed is fed at too high a speed, the stroke and the bitmaps composed of it can tilt. What is characteristic of this is that the individual ink drops are offset systematically, independently of the specific print image of the stroke, and this becomes larger the closer the drop in question was produced to the end of a stroke.
  • the printer In order to obtain a fluctuation range for the droplet positions obtained, it is advantageous if the printer generates sequences of—preferably, but not necessarily all—control signals for driving charging electrodes and/or deflection electrodes of the CIJ printer in several runs, in order to generate points or groups of points of the bitmap by applying ink drops to a substrate to be printed, and when the print image applied to the substrate in response to the control signal is recorded with the optical monitoring means and stored as the print image assigned to the control signal.
  • the print image and in particular the size of the individual drops or that of a single droplet generated dots also depends on the ink used and the substrate.
  • the printer is allowed to generate sequences of—preferably, but not necessarily all—control signals for driving charge electrodes and/or deflection electrodes of the CIJ printer in the multiple passes, with the order of the control signals for driving charge electrodes and/or deflection electrodes of the CIJ -Printer, are generated, is varied from sequence to sequence. In principle, it is also possible to do this for all possible combinations of strokes.
  • the analysis options that can be created with the data obtained in the training routine can be increased even further if the printer varies print parameters in the multiple runs, which can fluctuate during the printing operation of the CIJ printer and lead to a change in the print image.
  • the viscosity of the ink can fluctuate during operation, which can lead to a change in the printed image.
  • Figure 1a the letter "E" on a 7x5 matrix 1 is shown as a simple example of such a bitmap 90 .
  • a CIJ printer today can usually display more dots in one line, e.g. 32 dots, which allows the user to print complex content, as exemplified in Figure 1d are shown to be assembled as the desired print image, which is then converted into the corresponding bitmap and processed.
  • the role of the rows and columns can, of course, be reversed, particularly in the case of a different orientation.
  • Figure 1c shows schematically how the generation and deflection of the ink drops is realized by the CIJ printer.
  • the ink is with defined properties, in particular defined pressure and viscosity defined by one in the Figure 1c Hydraulic module 5 shown only schematically provided and in the Figure 1c not recognizable ink channel of the nozzle 10 supplied.
  • the column of ink in the ink channel of the nozzle 10 is modulated by an oscillator 20, which can be embodied as a piezo actuator, for example. After exiting the nozzle 10, with suitably selected jet conditions, the theoretical by C.
  • ink drops 12 of a jet that meets these conditions propagate at a speed of 20 m/s to 30 m/s, and high five-digit and even six-digit numbers of ink drops 12 can already be produced per second today.
  • the charging electrode 25 is controlled by a controller, which converts a print image generated directly or indirectly by a user in a memory 60 into a bitmap 90 in a raster image processor 65, and the information about the rows or columns to be printed on the one hand to a charging voltage calculator 70 forwards, which is preferably implemented as a separate processor.
  • the charging voltage calculator 70 generates a corresponding charging signal according to the calculated charge to be applied and passes it on to the charging electrode 25 as a control signal.
  • the CIJ printer prints them as a common "Stroke" 40,41, as in Figure 1b is illustrated, processed.
  • the processing takes place as in figure 3 is shown in the form of a schematic flowchart, in the CIJ printer in that from a print image specified by the user in step 110, which, for example, if counter information is contained, can change between print processes to be carried out directly one after the other and is stored or temporarily stored in memory 60 the bitmap 90 to be printed is obtained on a processor or processor core, the raster image processor (RIP) 65, in a process referred to as ripping 120, and in particular the sequence of points to be printed next by the CIJ printer, the current stroke 40, 41, is determined, which indicates at which locations of the substrate 100 ink drops 12 are to be applied in order to generate dots.
  • RIP raster image processor
  • step 125 This information is then forwarded on the one hand in step 125 as input to the data processing system 75, which is implemented here with a separate processor, which compares the signal to be printed and an image of the print that has taken place, which is carried out by the optical Monitoring means 80 is forwarded to the data processing system 75 performs.
  • the charging voltage calculator 70 uses it to calculate the charging voltage in step 130, preferably taking into account the information about which stroke or strokes were printed shortly beforehand and possibly also which stroke or strokes are printed immediately afterwards Drops must be applied so that they land at the desired location on the substrate so that they can be applied to the charging electrode 25 when flying past.
  • the process step 130 is also preferably carried out on a separate processor or processor core.
  • the charging electrode 25 is then driven in step 140 when the actual printing process is being carried out and charges droplets 12 of the continuous stream of ink droplets, so that they can be separated from the stream of uncharged ink droplets 12a flying toward the catcher tube 35 are deflected and applied to the substrate 100.
  • a "Print-GO" signal is generated, e.g. when an object to be printed, which passes the CIJ printer and is to be printed, reaches a defined position achieved relative to the CIJ printer. This then triggers the print, if necessary after an adjusted waiting time, starting with the first stroke 40,41; it can make sense to wait for a predefinable waiting time between successive strokes 40,41.
  • a camera image is recorded as step 150, preferably with an optical monitoring means 80 designed here as a CCD camera. This can be triggered, for example using the Print-Go signal as a time frame of reference.
  • the image data of the camera image are then forwarded to a data processing system 75 and evaluated in step 160.
  • step 160 If the evaluation in step 160 indicates a malfunction or a printing error, an error warning or a printing stop can be triggered in step 170. Otherwise, processing can be continued by jumping back to step 120, particularly if the next stroke 40, 41 has not yet been calculated. However, when jumping back to step 120, another stroke that has already been calculated can also be read from a local memory, which is preferably managed according to the FIFO principle.
  • the Figure 2a an example of a bitmap to be printed 190 and the in Figure 2b
  • Bitmap 190 shown which can also be used in particular for a teaching process according to the invention, is formed by a sequence of all dot or ink drop combinations that can be written with a five-dot stroke 40,41, ie all possible strokes 40,41 that are actually executed by a printer that writes five drops wide.
  • the print images of the individual strokes 40, 41 recorded by the optical monitoring means 80 can, however, be used as the target image that should arise in response to the print command for this stroke 40, 41 when using the teaching according to the invention, which results in a very rapid evaluation leads.
  • the stroke-based approach enables an extremely simple learning process, which can ultimately even make it possible to operate an optical monitoring device 80 on a CIJ printer as a real plug-and-play module and the in figure 4 is shown schematically.
  • This print image is then recorded in step 230 with the optical monitoring means 80 designed as a camera, and at least one corresponding camera image is evaluated in step 240, preferably in order to obtain expected values for ink drop positions of the individual strokes 40,41.
  • each stroke 40,41 or a control signal corresponding to this stroke 40,41 is the position of the ink droplets 12 on the CCD chip of the optical monitoring means (80) designed as a camera in a y-direction, which corresponds to the deflection direction of the Ink drop 12 corresponds, logically associated as expected ink drop positions.
  • the distance between the images of the individual strokes 40, 41 on the CCD chip of the optical monitoring means 80 designed as a camera information is obtained at which x-positions on the CCD chip of the optical monitoring means 80 designed as a camera ink drops an nth stroke 40,41 of a predetermined sequence of strokes 40,41 is to be expected.
  • the output of the ripper 65 representing a specific stroke 40,41 can directly as input for the data processing device 75, which analyzes the camera image.
  • This input can then be converted directly into a set of expected pixel positions for the ink droplets 12 belonging to this stroke 40, 41 and it can be checked whether the corresponding pixels are set in the camera image. Even if the Should the drop position have wandered slightly, this ensures that the newly added drop 12 can be found quickly, and by analyzing deviations, it is possible on the one hand to determine whether the imprint is still acceptable or not by comparing it with acceptance ranges to be defined, while on the other hand there may already be indications of the present problems causing a deviation from the target position can be recovered.

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  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
  • Ink Jet (AREA)

Claims (12)

  1. Procédé de fonctionnement d'une imprimante CIJ (imprimante à jet d'encre continu) ayant un moyen de surveillance (80) et consistant à :
    - générer un fichier Bitmap (90, 190) de l'image à imprimer,
    - commander séquentiellement des électrodes de charge (25) et/ou des électrodes de déflexion (30) de l'imprimante CIJ, chaque fois des lignes ou des colonnes du fichier Bitmap (90, 190) par l'application de rangées de gouttes d'encre (12) juxtaposées et qui forment respectivement une trace (40, 41) sur un support d'impression (100) pour réaliser et ainsi obtenir une image d'impression réelle (195) sur le support (100),
    - saisir l'image d'impression réelle (195) appliquée sur le support (100) avec le moyen de surveillance optique (80), et
    - comparer de manière automatisée le fichier Bitmap (90, 190) de l'image d'impression souhaitée et de l'image d'impression réelle (195) appliquée sur le substrat (100) et saisie par le moyen de surveillance (80), procédé caractérisé en ce que
    la comparaison automatisée du fichier Bitmap (90, 190) de l'image d'impression souhaitée et de l'image d'impression réelle (195) appliquée sur le support (100), se fait sur la base de lignes ou de colonnes du fichier Bitmap (90, 190) ou sur la base de composants de lignes ou de colonnes du fichier Bitmap (90, 190) de façon à vérifier après chaque trace (40, 41) ou encore pendant l'exécution de la trace (40, 41), si les gouttes d'encre (12) qui forment la trace sont placées correctement.
  2. Procédé selon la revendication 1,
    caractérisé en ce qu'
    on utilise au moins un signal de commande pour commander séquentiellement les électrodes de charge (25) et/ou les électrodes de déflexion (30) de l'imprimante CIJ dans la comparaison automatisée du fichier Bitmap (90, 190) de l'image d'impression souhaitée et de l'image d'impression réelle (195) appliquée sur le substrat (100) et saisie par le moyen de surveillance optique (80) pour déterminer l'image d'impression attendue de la ligne ou de la colonne respective.
  3. Procédé selon la revendication 2,
    caractérisé en ce qu'
    on utilise au moins un autre signal de commande pour commander séquentiellement les électrodes de charge (25) et/ou les électrodes de déflexion (30) de l'imprimante CIJ pour la comparaison automatisée du fichier Bitmap (90, 190) de l'image d'impression souhaitée et de l'image d'impression réelle (195) appliquée sur le support (100) et saisie par le moyen de surveillance optique (80) pour déterminer l'image d'impression attendue de la ligne ou de la colonne respective du fichier Bitmap (90, 190).
  4. Procédé selon l'une des revendications 1 à 3,
    caractérisé en ce que
    la commande séquentielle des électrodes de charge (25) et/ou des électrodes de déflexion (30) de l'imprimante CIJ se fait également par ligne ou colonne.
  5. Procédé selon l'une des revendications 1 à 4,
    caractérisé en ce que
    l'imprimante CIJ comprend plusieurs processeurs ou un processeur avec plusieurs noyaux de processeurs et sur l'un des processeurs, on génère le fichier Bitmap (90, 190) de l'image d'impression souhaitée et on génère les signaux de commande pour la commande séquentielle des électrodes de charge (25) et/ou des électrodes de déflexion (30) de l'imprimante CIJ en les contrôlant et sur l'autre processeur, on fait la comparaison automatisée du fichier Bitmap (90, 190) de l'image d'impression souhaitée et de l'image d'impression réelle (195) appliquée sur le support (100) et saisie par le moyen de surveillance optique (80).
  6. Imprimante CIJ pour la mise en oeuvre d'un procédé selon l'une des revendications 1 à 5,
    comprenant :
    - un module hydraulique (5) pour l'alimentation en encre,
    - un générateur de gouttes comportant une buse (10) et un oscillateur (20) qui est alimenté en encre par le module hydraulique (5) et génère des gouttes d'encre (12),
    - au moins une électrode de charge (25) pour appliquer une charge définie aux gouttes d'encre (12) produites par le générateur de gouttes,
    - au moins une électrode de déflexion (30) pour influencer la trajectoire des gouttes d'encre (12) générées par le générateur de gouttes et chargées par l'électrode de charge (25),
    - une commande conçue pour transformer un fichier Bitmap (90, 190) à imprimer par ligne ou par colonne en une séquence de signaux de commande avec lesquels on commande l'électrode de charge (25) et/ou l'électrode de déflexion (30) pour former à partir des gouttes (12) d'une séquence de gouttes, une image de cette ligne ou colonne sur le support d'impression (100), et
    - un moyen de surveillance optique (80) pour surveiller l'image d'impression réelle (195) formée sur le support d'impression (100),
    caractérisé en ce que
    l'imprimante CIJ comprend un dispositif de traitement de données conçu pour exécuter l'étape de comparaison automatisée selon l'une des revendications 1 à 5.
  7. Imprimante CIJ selon la revendication 6,
    caractérisée en ce que
    l'imprimante CIJ comporte un premier processeur ou un premier noyau de processeur prévu pour la commande et un second processeur ou noyau de processeur associé au dispositif de traitement de données.
  8. Imprimante CIJ selon l'une des revendications 6 ou 7,
    caractérisée en ce que
    la commande avec le dispositif de traitement de données est une communication de signal de façon que les séquences respectives de signaux de commande ou d'ordres de commande correspondant à ces séquences soient transmises de la commande au dispositif de traitement de données.
  9. Procédé d'apprentissage d'un moyen de surveillance optique (80) d'une imprimante CIJ selon l'une des revendications 6 à 8,
    caractérisé en ce que
    l'imprimante CIJ génère dans au moins un passage du fichier Bitmap (90, 190) qui contient une séquence de signaux de commande pour commander les électrodes de charge (25) et/ou les électrodes de déflexion (30) de l'imprimante CIJ lors de l'exécution d'une trace (40, 41),
    on réalise l'image réelle (195) de ce fichier Bitmap (90, 190) en appliquant des gouttes d'encre sur un support d'impression (100),
    - avec le moyen de surveillance optique (80), on prend une image de l'image d'impression réelle (195) et on identifie la partie appliquée de l'image d'impression réelle (195) à chaque fois comme réaction à un signal de commande pour une trace (40, 41) donnée sur le support (100), et on enregistre l'image d'impression attendue, associée à cette trace (40, 41) ou signal de commande.
  10. Procédé selon la revendication 9,
    caractérisé en ce que
    l'imprimante dans plusieurs passages génère, contient, imprime un fichier Bitmap (90, 190) qui contient une séquence de signaux de commande pour commander des électrodes de charge (25) et/ou des électrodes de déflexion (30) de l'imprimante CIJ, pour appliquer respectivement des points ou des groupes de points du fichier Bitmap (90, 190) par l'application de gouttes d'encre (12) sur un support d'impression (100) pour obtenir une image d'impression réelle, et
    on prend et on identifie l'image d'impression appliquée sur le substrat, comme réaction au signal de commande avec le moyen de surveillance optique et on enregistre l'image d'impression associée au signal de commande.
  11. Procédé selon la revendication 10,
    caractérisé en ce que
    l'imprimante génère dans plusieurs passages, chaque fois, une séquence de signaux de commande pour commander les électrodes de charge (25) et/ou des électrodes de déflexion (30) de l'imprimante CIJ,
    - l'ordre dans lequel les signaux de commande servant à commander les électrodes de charge (25) ou des électrodes de déflexion de l'imprimante CIJ (30) varient d'une séquence à l'autre.
  12. Procédé selon l'une des revendications 10 ou 11,
    caractérisé en ce que
    l'imprimante génère dans plusieurs passages, chaque fois, une séquence de signaux de commande pour commander les électrodes de charge (25) et/ou les électrodes de déflexion (30) de l'imprimante CIJ et dans différents passages, on fait varier les paramètres d'impression qui peuvent osciller dans le mode d'impression de l'imprimante CIJ et se traduisent par une modification de l'image d'impression (195).
EP19161144.1A 2019-03-06 2019-03-06 Procédé de fonctionnement d'une imprimante jet d'encre continu à surveillance optique de la qualité d'impression, imprimante à jet d'encre continu à surveillance optique de la qualité d'impression et procédé d'apprentissage d'une imprimante à jet d'encre continu à surveillance optique de la qualité d'impression Active EP3705295B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP19161144.1A EP3705295B1 (fr) 2019-03-06 2019-03-06 Procédé de fonctionnement d'une imprimante jet d'encre continu à surveillance optique de la qualité d'impression, imprimante à jet d'encre continu à surveillance optique de la qualité d'impression et procédé d'apprentissage d'une imprimante à jet d'encre continu à surveillance optique de la qualité d'impression
US17/436,437 US11858267B2 (en) 2019-03-06 2019-12-10 Method for operating a CIJ printer with optical monitoring of printing quality, CIJ printer with optical monitoring of printing quality, and method for teaching-in a CIJ printer with optical monitoring of printing quality
CN201980093684.5A CN113543977B (zh) 2019-03-06 2019-12-10 操作具有打印质量光学监视的cij打印机的方法、这种cij打印机及其示教方法
JP2021552743A JP7332707B2 (ja) 2019-03-06 2019-12-10 プリント品質の光学モニタリングを用いるｃｉｊプリンタを動作させる方法、プリント品質の光学モニタリングを用いるｃｉｊプリンタ及びプリント品質の光学モニタリングを用いるｃｉｊプリンタをティーチングする方法
PCT/EP2019/084488 WO2020177912A1 (fr) 2019-03-06 2019-12-10 Procédé servant à faire fonctionner une imprimante à jet d'encre continu équipée d'une surveillance optique de la qualité d'impression, imprimante à jet d'encre continu équipée d'une surveillance optique de la qualité d'impression, et procédé d'instruction d'une imprimante à jet d'encre continu équipée d'une surveillance optique de la qualité d'impression

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19161144.1A EP3705295B1 (fr) 2019-03-06 2019-03-06 Procédé de fonctionnement d'une imprimante jet d'encre continu à surveillance optique de la qualité d'impression, imprimante à jet d'encre continu à surveillance optique de la qualité d'impression et procédé d'apprentissage d'une imprimante à jet d'encre continu à surveillance optique de la qualité d'impression

Publications (2)

Publication Number Publication Date
EP3705295A1 EP3705295A1 (fr) 2020-09-09
EP3705295B1 true EP3705295B1 (fr) 2023-04-19

Family

ID=65724208

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19161144.1A Active EP3705295B1 (fr) 2019-03-06 2019-03-06 Procédé de fonctionnement d'une imprimante jet d'encre continu à surveillance optique de la qualité d'impression, imprimante à jet d'encre continu à surveillance optique de la qualité d'impression et procédé d'apprentissage d'une imprimante à jet d'encre continu à surveillance optique de la qualité d'impression

Country Status (5)

Country Link
US (1) US11858267B2 (fr)
EP (1) EP3705295B1 (fr)
JP (1) JP7332707B2 (fr)
CN (1) CN113543977B (fr)
WO (1) WO2020177912A1 (fr)

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07144461A (ja) 1993-11-24 1995-06-06 Hitachi Eng Co Ltd 印字装置
CN1081988C (zh) * 1995-08-04 2002-04-03 多米诺印刷科学公开有限公司 连续喷墨打印机和操作方法
US6003980A (en) * 1997-03-28 1999-12-21 Jemtex Ink Jet Printing Ltd. Continuous ink jet printing apparatus and method including self-testing for printing errors
JPH11198360A (ja) 1998-01-20 1999-07-27 Hitachi Ltd インクジェット記録装置
FR2801836B1 (fr) * 1999-12-03 2002-02-01 Imaje Sa Imprimante a fabrication simplifiee et procede de realisation
US7104634B2 (en) * 2001-05-03 2006-09-12 Jemtex Ink Jet Printing Ltd. Ink jet printers and methods
WO2008102458A1 (fr) * 2007-02-23 2008-08-28 Hitachi Industrial Equipment Systems Co., Ltd. Dispositif d'impression à jet d'encre
FR2948602B1 (fr) * 2009-07-30 2011-08-26 Markem Imaje Dispositif de detection de directivite de trajectoires de gouttes issues de jet de liquide, capteur electrostatique, tete d'impression et imprimante a jet d'encre continu devie associes
US8714675B2 (en) * 2012-01-26 2014-05-06 Eastman Kodak Company Control element for printed drop density reconfiguration
FR2989625B1 (fr) * 2012-04-24 2015-12-25 Markem Imaje Impression d'un motif d'authentification avec une imprimante a jet d'encre continu devie
GB2562714B (en) 2017-05-03 2021-11-24 Domino Uk Ltd Improvements in or relating to printers
EP3845902B1 (fr) 2017-06-23 2022-09-14 NanoTemper Technologies GmbH Procédés de mesure d'interactions inter- et/ou intra-moléculaires

Also Published As

Publication number Publication date
JP7332707B2 (ja) 2023-08-23
WO2020177912A1 (fr) 2020-09-10
EP3705295A1 (fr) 2020-09-09
CN113543977A (zh) 2021-10-22
CN113543977B (zh) 2023-09-29
JP2022525508A (ja) 2022-05-17
US20220169022A1 (en) 2022-06-02
US11858267B2 (en) 2024-01-02

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