EP1132203A1 - Method and means for automatically preregistering rotary printing machines - Google Patents

Method and means for automatically preregistering rotary printing machines Download PDF

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Publication number
EP1132203A1
EP1132203A1 EP01101322A EP01101322A EP1132203A1 EP 1132203 A1 EP1132203 A1 EP 1132203A1 EP 01101322 A EP01101322 A EP 01101322A EP 01101322 A EP01101322 A EP 01101322A EP 1132203 A1 EP1132203 A1 EP 1132203A1
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EP
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Prior art keywords
printing
mark
cylinder
registration
cylinders
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Granted
Application number
EP01101322A
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German (de)
French (fr)
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EP1132203B1 (en
Inventor
Nathan Stern
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Bobst Mex SA
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Bobst SA
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/08—Cylinders
    • B41F13/10—Forme cylinders
    • B41F13/12—Registering devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/02—Conveying or guiding webs through presses or machines
    • B41F13/025—Registering devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2233/00—Arrangements for the operation of printing presses
    • B41P2233/10—Starting-up the machine
    • B41P2233/13—Pre-registering

Definitions

  • the subject of the present invention is a method of locating automatic printing in a rotary machine and a device for implementation of the process.
  • the method relates in particular to tracking automatic printing of printers left in a rotary machine such as a rotogravure, flexographic or other, printing a web material such as paper, cardboard or a flexible material such as polyethylene.
  • Such machines generally have several groups printers placed one after the other and each printing a color different.
  • a printing unit includes among others a printing cylinder, and a pressure cylinder between which the material to be printed passes.
  • the cylinder printer is either an engraved cylinder or a cylinder fitted with a plate reproducing the print motif. To get the perfect impression, it is necessary that the various impressions made by the groups printers overlap exactly.
  • Each printing group prints a registration mark on the strip of material and the registration of different colors are made by overlapping the different brands tracking by acting for example on the elongation or the tension of this strip of material by means of one or more compensating rollers arranged between the printing units. Such a tracking method is described in patent CH 539 509.
  • This method consists in determining the error marking at a printing station, then, from the result of this determination we calculate, as a function of the movement of the strip of material, a voltage or a setpoint extension thereof between the station of printing concerned and the previous one, this tension or this elongation to allow an optimal correction of the tracking error.
  • the operation next is to compare the setpoint voltage or elongation with the tension or real elongation of the strip of material between the station of printing concerned and the previous one so as to act on the strip of matter according to the result of this comparison to bring the tension or the elongation of the strip of material at the value of the tension or the setpoint extension.
  • this tracking process does not will operate properly only under continuous operating conditions of the printing machine, that is to say when it is in the production phase, but that when starting the machine it will be necessary beforehand calibrate the different printing cylinders with respect to the other.
  • This operation is carried out manually by the driver of the machine or using a pre-positioning system. To do this, the driver will carry out manual pre-filling of the printing cylinders and / or compensating rollers so as to bring all the marking marks printed by each of the printing cylinders in the space defined by the reading window.
  • the device's computer memory different parameters such as data relating to the angular position of the printing cylinders, the position data compensating rollers and other information so that that, during a repetition of the same work, he no longer has to repeat this surgery.
  • This precaluation can also be achieved by performing a calculation of the angular position of the printing cylinders as a function of the length of strip between two printing units and the circumference of the cylinders printers that match the print format. In this calculation, the ratio must necessarily be an integer.
  • the position of the location is somewhat outside the limits of the reading window. It suits then perform a readjustment operation if necessary, and bring these registration marks in this window by an additional operation called phasing. It may even be that, the pre-setting operation was wrong done, the marks are in the print and it is not possible phasing, in which case it will be necessary to re-calibrate.
  • driver will first position the printing cylinders in their respective accommodation according to their benchmark. Then he will proceed to prepositioning of the compensating cylinders and / or rollers by modifying, in the latter case, the strip length between the printing units. he will then perform a coarse manual setting at slow speed before proceeding during the phasing operation using an oscilloscope or automatically using of a code. Resulting from this last step, necessary corrections will be the subject of a new manual tracking which will imply by effect of recurrence of a new phasing operation followed by fine adjustments before be able to go to the production phase.
  • the object of the present invention is to eliminate the drawbacks mentioned above and in particular to reduce to a large extent the time and consumption of strip material when starting a machine rotary printing.
  • the invention allows tracking simple and automatic which allows a maximum initial tracking error.
  • the the procedure is the same whether preparing a new one or a old work.
  • Tape path and length data between groups are no longer needed. Phasing and tracking are done with only one color which avoids any problem of confusion or overlapping marks resulting from multiple overlays.
  • the corrections of tracking errors can be made very quickly by displacement of the compensating rollers at high speeds, typically of the order of 15 mm / s, without this causing changes in the belt tension.
  • a possible error in the path of the tape in its routing around the many idler rollers used between the printing units, for example for drying the web modifies without accordingly the length of the tape path.
  • the process tracking is not affected by an operation that requires the changing a printing cylinder or a pressing cylinder.
  • the printing units must not necessarily be adjacent to each other. It may therefore be that, for maintenance reasons for example, any printing group is turned off in the middle of the rotary printing machine. This bet off does not disrupt the tracking process automatic.
  • FIG. 1 is a schematic representation of the organs of a rotary printing machine equipped with compensating rollers.
  • the band of material to be printed 1 scrolls in the direction indicated by the arrow 2.
  • This strip of material to be printed 1 passes successively in groups printers 3, 4, 5 and n.
  • the reference n is used here due to the fact that the rotary printing machine can include several printing groups placed one after the other.
  • Each printing unit 3 to n includes a printing cylinder 6, 7, 8 and n1 as well as a pressing cylinder 9, 10, 11 and n2.
  • compensating rollers 12, 13 and n3 are placed between the printing units 3 and 4, 4 and 5, 5 and n.
  • the last printing unit n is followed by a device 17 for controlling the voltage of strip driving two traction rollers 14 and 15 and receiving information a tension sensing member 16 consisting of a sliding roller, a voltage detector or other equivalent device.
  • a tension sensing member 16 consisting of a sliding roller, a voltage detector or other equivalent device.
  • Each of the rollers compensators 12, 13 and n3 is controlled by its respective motor 18, 19 and n4.
  • the pressure rollers 9, 10, 11 and n2 are actuated vertically by a control device 20, 21, 22 and n5.
  • the printing cylinders 6, 7, 8 and n1 are coupled to a single pulse generator 23.
  • the groups printers 4, 5 and n are equipped, at their output, with read heads 24, 25 and n6 for reading the position of registration marks printed on the tape material 1 by each of the printing cylinders 6 to n1.
  • the devices control 20, 21, 22 and n5 of the pressure cylinders 9, 10, 11 and n2 are controlled by a control circuit 26 which is connected on the one hand to a circuit for calculating the locating error 27 and on the other hand to a position calculation circuit angular 28 of the printing cylinders 6, 7, 8 and n1.
  • the calculation circuit of angular position 28 also receives information from the generator 23 connected to each of the printing cylinders 6, 7, 8 and n1.
  • the circuit of angular position calculation 28 is connected to the error calculation circuit of marking 27 which receives the information from the read heads 24, 25 and n6.
  • the tracking error calculation circuit 27 produces information intended to be sent to a tracking regulator 31 which in turn will issue a information for the control circuit 32 of motors 18, 19 and n4 causing the displacement of the compensating rollers 12, 13 and n3.
  • FIG. 2 is a schematic representation of the organs of a rotary printing machine without compensating rollers, this to illustrate an application of the automatic phasing process to another type of rotary printing machine.
  • the various components that can be found on this figure bear the same reference signs as those used in connection with figure 1, with the exception of that relating to the control in rotation printing cylinders 6, 7, 8 and n1 since in this case, the operations of tracking control will not be accomplished by moving rollers compensators but by acting directly on the rotation of the cylinders printers 6, 7, 8 and n1 via a control circuit 33 of the rotation of the printing cylinders 6, 7, 8 and n1.
  • only one pulse generator 23 has been shown here, but it is quite clear that it there should be as many pulse generators as there are cylinders printers. These pulse generators are generally mounted at one the ends of the print cylinder drive shaft.
  • Figure 3 is a schematic representation of the organs of a rotary printing machine at the start of the tracking operation automatic.
  • all the pressure rollers 9 to n2 are in the high position, which allows to put in place the strip of material to be printed 1 pinch downstream by the pair of traction rollers 14, 15.
  • the printing cylinders 6 to n1 were inserted into their housing without any identification of their angular position. Since the pressure cylinders are read, the strip to be printed is said to be white and therefore does not contain any impression even when it starts to scroll above the cylinders printers. No information about the length of the tape path between groups is only necessary. Compensating rollers 12 to n3 can therefore occupy any position although it is recommended to center them beforehand.
  • the strip preferably runs at reduced speed during all the phases necessary for tracking impressions.
  • the read heads which can be moved transversely to the direction of travel of the strip, must not necessarily be positioned on the line of marks.
  • Figure 4 is a schematic representation of the organs of a rotary printing machine in the first phase of tracking automatic.
  • the last pressure cylinder n2 is lowered until pressing the strip to be printed 1 against the printing cylinder correspondent n1.
  • the read head n6 can then read the impression left on the strip to be printed 1, and detect the registration mark of group n correspondent who prints at the same time as the image of the photo or engraved cylinder. Once detected, the location of this registration mark can be easily memorized by recording the generator increment of pulses corresponding to the instant of detection. In case the registration mark would not have been detected by the read head, a signal will be issued so that it is moved transversely until it aligns with the scrolling marks.
  • a second signal will be received when the head occupies a correct position.
  • the registration mark should be detected by the reading. Since the position of this registration mark is immutable by compared to the image of the plate or the engraved cylinder, and seeing that this same mark appears cyclically over time, a reading window can then be creates around this registration mark to eliminate all "background noise" generated by reading the rest of the print.
  • This operation which consists of placing a reading window around the registration mark is called phasing operation.
  • Figure 5 shows a diagram representing this operation of phasing which generally will take place successively from downstream to upstream in all printing groups independently.
  • the phasing operation of the printing unit n is carried out in the manner next: the number of pulses, delivered by the pulse generator 23, is first counted from a relative origin specific to the cylinder corresponding printer, until said registration mark 36 is detected by the read head n6.
  • This number of pulses corresponds to the necessary rotation of the printing cylinder n1 until the appearance of said registration mark 36 opposite the read head n6. Detection of this registration mark will immediately result in the memorization of the increment of the pulse generator at this point let's assume the increment number two hundred if the pulse generator includes for example 3600 for a revolution of cylinder.
  • Figures 6 and 7 are schematic representations of organs of a rotary printing machine, respectively in the second and third phase of the tracking operation automatic. These two stages take place in a perfectly identical to the process described for the first phase of tracking automatic.
  • the pressure cylinders 11 and 10 are lowered successively once, for each of them, the step preceding them is fully completed. Therefore, for each of the following printer groups 4 and 5 fitted with read heads 24, 25, the phasing operation is carried out with a printing strip 1 comprising only one printing, that of the printing group of the stage in question.
  • This advantage results from the opposite direction according to which the pressure rollers are successively lowered relative to in the direction of travel of the strip to be printed.
  • the read heads therefore no trouble detecting the mark 36 of the group in question, and the phasing operation and the memorization of the position of the reading window 35 open around registration marks 36 can be made successively for each of these printing groups without the risk that such a registration mark is lost in a regrettable overlap impressions.
  • the phasing operation can be performed in a single step by simultaneously lowering the cylinders pressers 10 to n2 of all the printing groups concerned. Indeed, if the read heads are already correctly positioned, they will not fail no case of detecting the marking mark of the printing unit which is their associated.
  • a simple solution consists in phasing by default the printing cylinders of these varnishing groups by placing them initially in a marked angular position; for example at 12 noon.
  • the phasing operation of such a printing unit having therefore been carried out by fault, the lowering of the pressure cylinder of this printing unit can then be carried out at the same time as the lowering of the pressure cylinder next adjacent printing unit, located upstream.
  • Figure 8 schematically illustrates the components of a machine printing press during the fourth start-up phase. Phasing having been carried out, the pressure rollers 10 to n2 are brought into position raised, which will have the effect of removing the prints from the printing groups 4 to n who will no longer be able to print the reason for their photo or cylinder engraved on the strip to be printed 1. Only the first pressure cylinder 9, located further upstream, is lowered preferentially at the same time but not before the other pressing cylinders are raised. Therefore, only the marking mark of the printing unit 3 will be printed on the material strip 1. In the reading window, previously defined for each printing group 4 to n, we will electronically create a brand of virtual location 39 whose position will be in the middle of the window reading 35.
  • Figure 9 shows the usefulness of such a virtual registration mark 39 in a diagram representing the operation of calculating the error of marking 41 in a mode called "cylinder mark".
  • the position of the virtual registration mark 39 is memorized during the phasing operation or calculated with known increments 37, 38 corresponding to the start and to the end of the reading window 35. Then, using the reading head 24 of the printing unit 4, we will detect the registration mark 40 left by the first printing unit 3 located furthest upstream.
  • the locating error 41 between virtual mark 39 and registration mark 40 of the first group printer 3 can therefore be easily determined by subtracting the memorized increments.
  • the purpose of this correction is to make the registration mark 40 of the first printing group 3 with the marking of virtual tracking 39.
  • Figure 10 shows a schematic representation of the organs of a rotary printing machine in the fifth phase of the operation of automatic tracking.
  • the first registration mark 40 printed by the first printing group 3 now arrives at the level of second compensating roller 13, located between the printing units 4 and 5.
  • the pressing cylinder 10 of the second printing unit 4 is lowered, and the image of the printing cylinder 7 is printed on the printing tape 1 with the mark of corresponding marking 36 left by the printing unit 4.
  • Figure 11 shows a diagram representing the operation of calculation of the residual locating error 42 in a finer mode called "brand - brand”. Phasing and error calculation operations marking 41 in "cylinder mark" mode having been carried out for all printing groups, registration marks 40 and 36 of the respective groups 3 and 4 therefore appear in the same reading window 35 read by the head of reading 24. However, due to different variable causes affecting substantially the printed medium (degree of humidity, homogeneity of the strip and other ambient working conditions), this tape may be subject to small elongations which consequently cause a slight shift in the registration mark 36 relative to registration mark 40 of the first printing unit 3 used as a reference.
  • the conventional system of control of the location such as that described in patent CH 539 509, will correct this residual tracking error 42 by acting for example on the control circuit 32 of the motors which drive the displacements of the compensating rollers or by acting on the circuit control 33 controlling the rotation of the printing cylinders.
  • Figure 12 gives a schematic representation of the organs of a rotary printing machine in the sixth phase of the operation of automatic tracking.
  • This sixth stage takes place according to the same principle which has been described previously by FIGS. 10 and 11.
  • the first registration mark 40, printed by the first printing unit 3, arrives now at the level of the next printing unit 5.
  • the operations of calculation and correction of the "brand - cylinder" error can be performed for printing unit 5 in the same way as they were done for the previous printer group.
  • the previous impression from printing unit 4 is only found on the second level compensating roller 13.
  • the pressure cylinder 11 lowers, the impression left by the printing cylinder previous 7 has not yet reached the level of the printing group 5 in question.
  • the image of the corresponding printing cylinder 8 is printed. with its registration mark 36 on the printing strip 1 which, at this point, is only marked with the first impression including the brand of marking 40 left by the first printing cylinder 6.
  • the operations of calculation and correction of the residual tracking error 42 in the mode "mark - mark" can be undertaken after detection by the head of reading 25 of the reference mark 40 making reference, and of the mark of location 36 of group 5 in question.
  • Figure 13 is a schematic representation of the organs of a rotary printing machine in the last phase of the implementation automatic tracking.
  • we will proceed to the operations of calculation in "mark - cylinder" mode between the marking mark 40 of the first printing cylinder 6 and the virtual registration mark 39 determined and memorized after phasing.
  • we will proceed to the calculations and correction of residual marking error 42 in "brand-brand" mode between the registration mark 40 of the first printing cylinder 6 and the registration mark 36 of the printing group n in question.
  • all the colors are in tracking compared to others and the auto tracking process takes finished.
  • the rotary printing machine can therefore, if necessary, now run at steady state where the print tape 1 can then scroll at high speed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Rotary Presses (AREA)
  • Printing Methods (AREA)
  • Control Of Position Or Direction (AREA)
  • Sewing Machines And Sewing (AREA)

Abstract

One of the reading heads (24,25,n6) is aligned with success path of register marks printed by the cylinder by lowering press roller (9) and phasing operation is performed with succeeding reading heads. The register errors at mark cylinder and mark-mark mode are determined and corrected. An Independent claim is also included for print register setting device.

Description

La présente invention a pour objet un procédé de mise en repérage automatique d'impressions dans une machine rotative et un dispositif pour la mise en oeuvre du procédé.The subject of the present invention is a method of locating automatic printing in a rotary machine and a device for implementation of the process.

Le procédé se rapporte en particulier à la mise en repérage automatique d'impressions laissées par des cylindres imprimeurs dans une machine rotative telle qu'une imprimeuse héliographique, flexographique ou autre, imprimant une matière en bande telle que du papier, du carton ou un matériau flexible comme par exemple du polyéthylène.The method relates in particular to tracking automatic printing of printers left in a rotary machine such as a rotogravure, flexographic or other, printing a web material such as paper, cardboard or a flexible material such as polyethylene.

De telles machines comportent en général plusieurs groupes imprimeurs placés l'un à la suite de l'autre et imprimant chacun une couleur différente. Un groupe imprimeur comprend entre autres un cylindre imprimeur, et un cylindre presseur entre lesquels passe la matière à imprimer. Le cylindre imprimeur est soit un cylindre gravé soit un cylindre équipé d'un cliché reproduisant le motif de l'impression. Pour obtenir une impression parfaite, il est nécessaire que les diverses impressions effectuées par les groupes imprimeurs se superposent exactement. Chaque groupe imprimeur imprime une marque de repérage sur la bande de matière et la mise en repérage des différentes couleurs s'effectue en faisant se superposer les différentes marques de repérage en agissant par exemple sur l'allongement ou la tension de cette bande de matière au moyen d'un ou plusieurs rouleaux compensateurs disposés entre les groupes imprimeurs. Un tel procédé de mise en repérage est décrit dans le brevet CH 539 509. Ce procédé consiste à déterminer l'erreur de repérage à une station d'impression, ensuite, à partir du résultat de cette détermination on calcule, en fonction du défilement de la bande de matière, une tension ou un allongement de consigne de celle-ci entre la station d'impression concernée et la précédente, cette tension ou cet allongement devant permettre une correction optimale de l'erreur de repérage. L'opération suivante consiste à comparer la tension ou l'allongement de consigne avec la tension ou l'allongement réel de la bande de matière entre la station d'impression concernée et la précédente de manière à agir sur la bande de matière en fonction du résultat de cette comparaison pour porter la tension ou l'allongement de la bande de matière à la valeur de la tension ou de l'allongement de consigne.Such machines generally have several groups printers placed one after the other and each printing a color different. A printing unit includes among others a printing cylinder, and a pressure cylinder between which the material to be printed passes. The cylinder printer is either an engraved cylinder or a cylinder fitted with a plate reproducing the print motif. To get the perfect impression, it is necessary that the various impressions made by the groups printers overlap exactly. Each printing group prints a registration mark on the strip of material and the registration of different colors are made by overlapping the different brands tracking by acting for example on the elongation or the tension of this strip of material by means of one or more compensating rollers arranged between the printing units. Such a tracking method is described in patent CH 539 509. This method consists in determining the error marking at a printing station, then, from the result of this determination we calculate, as a function of the movement of the strip of material, a voltage or a setpoint extension thereof between the station of printing concerned and the previous one, this tension or this elongation to allow an optimal correction of the tracking error. The operation next is to compare the setpoint voltage or elongation with the tension or real elongation of the strip of material between the station of printing concerned and the previous one so as to act on the strip of matter according to the result of this comparison to bring the tension or the elongation of the strip of material at the value of the tension or the setpoint extension.

Ce procédé nécessite bien entendu une lecture des marques de repérage qui nécessite la création d'une fenêtre de lecture de façon à ce que l'on soit absolument certain de ne lire que les marques préalablement imprimées sur la bande de matière, à l'exclusion de toute autre partie de l'impression. En règle générale, les marques de repérage sont imprimées dans un espace libre de toute autre impression, par exemple entre deux formats ou images imprimées, ou dans un des bords de la bande appelé bord de rive. Le brevet CH 548 933 décrit en détail une installation pour obtenir une fenêtre de lecture.This process obviously requires a reading of the marks of tracking which requires the creation of a reading window so that one is absolutely certain to read only the marks beforehand printed on the material strip, to the exclusion of any other part of the impression. Generally, the registration marks are printed in a space free of any other impression, for example between two formats or printed images, or in one of the edges of the strip called the edge of the edge. The Patent CH 548 933 describes in detail an installation for obtaining a window of reading.

Il est bien clair que ce procédé de mise en repérage ne fonctionnera convenablement qu'en régime de fonctionnement permanent de la machine d'impression, c'est à dire lorsque celle-ci est en phase de production, mais que lors de la mise en route de la machine il faudra préalablement procéder au calage des différents cylindres imprimeurs les uns par rapport aux autres. Cette opération s'effectue manuellement par le conducteur de la machine ou à l'aide d'un système de pré-positionnement. Pour ce faire, le conducteur effectuera un précalage manuel des cylindres imprimeurs et/ou des rouleaux compensateurs de façon à amener toutes les marques de repérage imprimées par chacun des cylindres imprimeurs dans l'espace défini par la fenêtre de lecture. Puis il entrera dans la mémoire du calculateur du dispositif de mise en repérage différents paramètres tels que les données relatives à la position angulaire des cylindres imprimeurs, les données relatives à la position des rouleaux compensateurs, ainsi que d'autres informations de façon à ce que, lors d'une répétition du même travail, il n'ait plus à recommencer cette opération.It is quite clear that this tracking process does not will operate properly only under continuous operating conditions of the printing machine, that is to say when it is in the production phase, but that when starting the machine it will be necessary beforehand calibrate the different printing cylinders with respect to the other. This operation is carried out manually by the driver of the machine or using a pre-positioning system. To do this, the driver will carry out manual pre-filling of the printing cylinders and / or compensating rollers so as to bring all the marking marks printed by each of the printing cylinders in the space defined by the reading window. Then it will enter the device's computer memory different parameters such as data relating to the angular position of the printing cylinders, the position data compensating rollers and other information so that that, during a repetition of the same work, he no longer has to repeat this surgery.

Ce précalage peut aussi être réalisé en effectuant un calcul de la position angulaire des cylindres imprimeurs en fonction de la longueur de bande entre deux groupes imprimeurs et de la circonférence des cylindres imprimeurs qui correspond au format de l'impression. Dans ce calcul, le ratio doit nécessairement être un nombre entier.This precaluation can also be achieved by performing a calculation of the angular position of the printing cylinders as a function of the length of strip between two printing units and the circumference of the cylinders printers that match the print format. In this calculation, the ratio must necessarily be an integer.

Après ce précalage, il se peut que la position des marques de repérage soit quelque peu hors des limites de la fenêtre de lecture. Il convient alors d'effectuer une opération de recalage si nécessaire, et de ramener ces marques de repérage dans cette fenêtre par une opération supplémentaire appelée phasage. Il se peut même que, l'opération de précalage ayant été mal faite, les marques se trouvent dans l'impression et qu'il ne soit pas possible d'en effectuer le phasage, auquel cas, il faudra procéder à un nouveau calage.After this precalvation, the position of the location is somewhat outside the limits of the reading window. It suits then perform a readjustment operation if necessary, and bring these registration marks in this window by an additional operation called phasing. It may even be that, the pre-setting operation was wrong done, the marks are in the print and it is not possible phasing, in which case it will be necessary to re-calibrate.

D'une manière générale dans l'état actuel de la technique, les différentes étapes qui permettent de réaliser un calage des cylindres et/ou rouleaux compensateurs nécessitent au moins les opérations suivantes: le conducteur positionnera tout d'abord les cylindres imprimeurs dans leur logement respectif en fonction de leur repère. Puis il procèdera au prépositionnement des cylindres et/ou rouleaux compensateurs en modifiant, dans ce dernier cas, la longueur de bande entre les groupes imprimeurs. Il effectuera ensuite un calage manuel grossier à marche lente avant de procéder à l'opération de phasage à l'aide d'un oscilloscope ou automatiquement à l'aide d'un code. Résultant de cette dernière étape, des corrections nécessaires feront l'objet d'un nouveau repérage manuel qui impliquera par effet de récurrence une nouvelle opération de phasage suivie de réglages fins avant de pouvoir passer à la phase de production.In general, in the current state of the art, the different stages which make it possible to calibrate the cylinders and / or Compensating rollers require at least the following operations: driver will first position the printing cylinders in their respective accommodation according to their benchmark. Then he will proceed to prepositioning of the compensating cylinders and / or rollers by modifying, in the latter case, the strip length between the printing units. he will then perform a coarse manual setting at slow speed before proceeding during the phasing operation using an oscilloscope or automatically using of a code. Resulting from this last step, necessary corrections will be the subject of a new manual tracking which will imply by effect of recurrence of a new phasing operation followed by fine adjustments before be able to go to the production phase.

L'application des opérations que nous venons de décrire résulte, dans la plupart des cas, d'une consommation importante de matière en bande pour amener la machine, de sa phase de démarrage, à un régime permanent en phase de production.The application of the operations which we have just described results, in most cases, a significant consumption of strip material to bring the machine, from its start-up phase, to a steady state in the production phase.

Cette importante consommation de matière en bande provient de plusieurs facteurs dont le principal trouve son origine dans le fait que le précalage des cylindres imprimeurs et/ou rouleaux compensateurs s'effectue visuellement par le conducteur de la machine et que celui-ci, risque de faire des erreurs d'appréciations importantes pour caler en une fois tous les cylindres imprimeurs. En effet, un mauvais calage peut avoir pour résultat que la marque de repérage ne soit pas imprimée dans la fenêtre de lecture auquel cas il ne pourra pas y avoir de phasage possible. De plus, lors de la période de démarrage la possibilité d'erreur de calage peut être au maximum de plus ou moins un demi-format d'impression si le précalage n'est pas correct et cela comporte le risque de voir la marque de repérage être imprimée dans la zone correspondant à l'image imprimée rendant de ce fait impossible toute détection de la marque de repérage et donc également impossible tout phasage. De multiples autres problèmes affectent l'opération de calage des cylindres imprimeurs qui dépend notamment de la précision de l'insertion des cylindres, de la variété des substrats utilisés, des différents niveaux de tension de la bande entre les groupes imprimeurs ou des chemins de bande parfois variables. Ces paramètres, pour ne citer que ceux-ci, sont souvent difficiles à maítriser. Ils engendrent des imprécisions qui se répercutent en cascade et s'amplifient en aval entre les différents groupes imprimeurs pour finalement dépasser les valeurs tolérables prescrites au niveau du repérage automatique.This significant consumption of strip material comes from several factors, the main one of which is due to the fact that the pre-setting of the printing cylinders and / or compensating rollers is carried out visually by the operator and that the operator risks errors of important appreciation to wedge in one go every printing cylinders. Indeed, a bad timing can result in the registration mark is not printed in the reading window at which in this case there will be no possible phasing. In addition, during the period of startup the possibility of timing error can be at most more or minus half a print format if the pre-setting is not correct and this carries the risk of having the registration mark printed in the area corresponding to the printed image thereby making detection impossible of the registration mark and therefore also impossible all phasing. Of multiple other issues affect the cylinder timing operation printers which depends in particular on the precision of the insertion of the cylinders, the variety of substrates used, the different voltage levels of the tape between printing groups or sometimes tape paths variables. These parameters, to name a few, are often difficult to control. They generate inaccuracies which are reflected in cascade and increase downstream between the different printing groups and finally exceed the tolerable values prescribed for automatic tracking.

Pour faire face à la concurrence et accroítre la souplesse des services offerts dans le domaine des arts graphiques industriels, les séries de productions sont devenues de plus en plus petites suscitant en conséquence de fréquents changements de travaux. Ces changements engendrent à leur tour beaucoup de maculature et de temps perdu dans la phase de préparation, ce qui finalement se répercute inévitablement sur les prix de revient des produits finis.To face competition and increase flexibility services offered in the field of industrial graphic arts, series of productions have become smaller and smaller resulting in frequent job changes. These changes lead to their a lot of buildup and time wasted in the preparation phase, which ultimately inevitably affects the cost prices of Finished products.

Le but de la présente invention vise à supprimer les inconvénients précités et en particulier à réduire dans une large mesure le temps et la consommation de matière en bande lors de la mise en route d'une machine rotative d'impression.The object of the present invention is to eliminate the drawbacks mentioned above and in particular to reduce to a large extent the time and consumption of strip material when starting a machine rotary printing.

Ce but est atteint grâce à un procédé conforme à ce qu'énonce la revendication 1 et à un dispositif conforme à ce qu'énonce la revendication 9.This goal is achieved by a process in accordance with what the claim 1 and a device in accordance with claim 9.

L'invention, telle que décrite ci-après, permet une mise en repérage simple et automatique qui autorise une erreur de repérage initiale maximale. La procédure est identique qu'il s'agisse de la préparation d'un nouveau ou d'un ancien travail. Les données relatives aux chemins de bande et à la longueur entre les groupes ne sont plus nécessaires. Le phasage et la mise en repérage ne se font qu'avec une seule couleur ce qui évite tout problème de confusion ou de chevauchement des marques résultant de plusieurs surimpressions. Les corrections des erreurs de repérage peuvent s'effectuer très rapidement par déplacement des rouleaux compensateurs à des vitesses élevées, typiquement de l'ordre de 15 mm/s, sans que cela n'engendre des modifications dans la tension de la bande. Une éventuelle erreur du parcours de la bande dans son cheminement autour des nombreux rouleaux de renvoi utilisés entre les groupes imprimeurs, par exemple pour le séchage de la bande, modifie sans conséquence la longueur du chemin de bande. Selon l'invention, le processus de mise en repérage n'est pas affecté par une opération qui nécessite le changement d'un cylindre imprimeur ou d'un cylindre presseur. Enfin, grâce au procédé de cette invention, les groupes imprimeurs ne doivent pas nécessairement être adjacents les uns les autres. Il se peut donc que, pour des raisons de maintenance par exemple, un groupe imprimeur quelconque soit mis hors fonction au milieu de la machine rotative d'impression. Cette mise hors fonction ne perturberait en aucun cas le processus de mise en repérage automatique.The invention, as described below, allows tracking simple and automatic which allows a maximum initial tracking error. The the procedure is the same whether preparing a new one or a old work. Tape path and length data between groups are no longer needed. Phasing and tracking are done with only one color which avoids any problem of confusion or overlapping marks resulting from multiple overlays. The corrections of tracking errors can be made very quickly by displacement of the compensating rollers at high speeds, typically of the order of 15 mm / s, without this causing changes in the belt tension. A possible error in the path of the tape in its routing around the many idler rollers used between the printing units, for example for drying the web, modifies without accordingly the length of the tape path. According to the invention, the process tracking is not affected by an operation that requires the changing a printing cylinder or a pressing cylinder. Finally, thanks to process of this invention, the printing units must not necessarily be adjacent to each other. It may therefore be that, for maintenance reasons for example, any printing group is turned off in the middle of the rotary printing machine. This bet off does not disrupt the tracking process automatic.

L'invention sera mieux comprise à l'étude d'un mode de réalisation pris à titre d'exemple nullement limitatif et illustré par les dessins annexés dans lesquels,

  • La figure 1 est une représentation schématique des organes d'une machine rotative d'impression équipée de rouleaux compensateurs,
  • La figure 2 est une représentation schématique des organes d'une machine rotative d'impression sans rouleaux compensateurs,
  • La figure 3 est une représentation schématique des organes d'une machine rotative d'impression au début de l'opération de mise en repérage automatique,
  • La figure 4 est une représentation schématique des organes d'une machine rotative d'impression dans la première phase de l'opération de mise en repérage automatique,
  • La figure 5 est un diagramme représentant l'opération de phasage,
  • La figure 6 est une représentation schématique des organes d'une machine rotative d'impression dans la deuxième phase de l'opération de mise en repérage automatique,
  • La figure 7 est une représentation schématique des organes d'une machine rotative d'impression dans la troisième phase de l'opération de mise en repérage automatique,
  • La figure 8 est une représentation schématique des organes d'une machine rotative d'impression dans la quatrième phase de l'opération de mise en repérage automatique,
  • La figure 9 est un diagramme représentant l'opération de calcul de l'erreur de repérage en mode "marque - cylindre",
  • La figure 10 est une représentation schématique des organes d'une machine rotative d'impression dans la cinquième phase de l'opération de mise en repérage automatique,
  • La figure 11 est un diagramme représentant l'opération de calcul de l'erreur de repérage en mode "marque-marque",
  • La figure 12 est une représentation schématique des organes d'une machine rotative d'impression dans la sixième phase de l'opération de mise en repérage automatique, et
  • La figure 13 est une représentation schématique des organes d'une machine rotative d'impression dans la dernière phase de l'opération de mise en repérage automatique.
    • The invention will be better understood on studying an embodiment taken by way of nonlimiting example and illustrated by the appended drawings in which,
  • FIG. 1 is a schematic representation of the members of a rotary printing machine equipped with compensating rollers,
  • FIG. 2 is a schematic representation of the members of a rotary printing machine without compensating rollers,
  • FIG. 3 is a schematic representation of the members of a rotary printing machine at the start of the automatic tracking operation,
  • FIG. 4 is a schematic representation of the organs of a rotary printing machine in the first phase of the automatic tracking operation,
  • FIG. 5 is a diagram representing the phasing operation,
  • FIG. 6 is a schematic representation of the organs of a rotary printing machine in the second phase of the automatic tracking operation,
  • FIG. 7 is a schematic representation of the members of a rotary printing machine in the third phase of the automatic tracking operation,
  • FIG. 8 is a schematic representation of the members of a rotary printing machine in the fourth phase of the automatic tracking operation,
  • FIG. 9 is a diagram representing the operation of calculating the marking error in "mark - cylinder" mode,
  • FIG. 10 is a schematic representation of the members of a rotary printing machine in the fifth phase of the automatic tracking operation,
  • FIG. 11 is a diagram representing the operation of calculating the tracking error in "brand-brand" mode,
  • FIG. 12 is a schematic representation of the members of a rotary printing machine in the sixth phase of the automatic tracking operation, and
  • Figure 13 is a schematic representation of the organs of a rotary printing machine in the last phase of the automatic tracking operation.

    • La figure 1 est une représentation schématique des organes d'une machine rotative d'impression équipée de rouleaux compensateurs. La bande de matière à imprimer 1 défile dans la direction indiquée par la flèche 2. Cette bande de matière à imprimer 1 passe successivement dans les groupes imprimeurs 3, 4, 5 et n. La référence n est utilisée ici en raison du fait que la machine rotative d'impression peut comprendre plusieurs groupes imprimeurs placés l'un à la suite de l'autre. Chaque groupe imprimeur 3 à n comprend un cylindre imprimeur 6, 7, 8 et n1 ainsi qu'un cylindre presseur 9, 10, 11 et n2. Dans l'exécution représentée sur la figure 1, des rouleaux compensateurs 12, 13 et n3 sont placés entre les groupes imprimeurs 3 et 4, 4 et 5, 5 et n. Le dernier groupe imprimeur n est suivi d'un dispositif 17 de contrôle de tension de bande pilotant deux rouleaux de traction 14 et 15 et recevant des informations d'un organe capteur de tension 16 constitué par un rouleau baladeur, un détecteur de tension ou un autre dispositif équivalent. Chacun des rouleaux compensateurs 12, 13 et n3 est commandé par son moteur respectif 18, 19 et n4. Les cylindres presseurs 9, 10, 11 et n2 sont actionnés verticalement par un dispositif de commande 20, 21, 22 et n5. Les cylindres imprimeurs 6, 7, 8 et n1 sont accouplés à un unique générateur d'impulsions 23. Les groupes imprimeurs 4, 5 et n sont équipés, à leur sortie, de têtes de lecture 24, 25 et n6 destinées à lire la position de marques de repérage imprimées sur la bande de matière 1 par chacun des cylindres imprimeurs 6 à n1. Les dispositifs de commande 20, 21, 22 et n5 des cylindres presseurs 9, 10, 11 et n2 sont pilotés par un circuit de contrôle 26 qui est relié d'une part à un circuit de calcul de l'erreur de repérage 27 et d'autre part à un circuit de calcul de position angulaire 28 des cylindres imprimeurs 6, 7, 8 et n1. Le circuit de calcul de position angulaire 28 reçoit de plus une information provenant du générateur d'impulsions 23 relié à chacun des cylindres imprimeurs 6, 7, 8 et n1. Le circuit de calcul de position angulaire 28 est relié au circuit de calcul d'erreur de repérage 27 lequel reçoit les informations des têtes de lecture 24, 25 et n6. Le circuit de calcul d'erreur de repérage 27 produit une information destinée à être envoyée sur un régulateur de repérage 31 qui va, à son tour émettre une information pour le circuit de commande 32 des moteurs 18, 19 et n4 provoquant le déplacement des rouleaux compensateurs 12, 13 et n3.Figure 1 is a schematic representation of the organs of a rotary printing machine equipped with compensating rollers. The band of material to be printed 1 scrolls in the direction indicated by the arrow 2. This strip of material to be printed 1 passes successively in groups printers 3, 4, 5 and n. The reference n is used here due to the fact that the rotary printing machine can include several printing groups placed one after the other. Each printing unit 3 to n includes a printing cylinder 6, 7, 8 and n1 as well as a pressing cylinder 9, 10, 11 and n2. In the embodiment shown in FIG. 1, compensating rollers 12, 13 and n3 are placed between the printing units 3 and 4, 4 and 5, 5 and n. The last printing unit n is followed by a device 17 for controlling the voltage of strip driving two traction rollers 14 and 15 and receiving information a tension sensing member 16 consisting of a sliding roller, a voltage detector or other equivalent device. Each of the rollers compensators 12, 13 and n3 is controlled by its respective motor 18, 19 and n4. The pressure rollers 9, 10, 11 and n2 are actuated vertically by a control device 20, 21, 22 and n5. The printing cylinders 6, 7, 8 and n1 are coupled to a single pulse generator 23. The groups printers 4, 5 and n are equipped, at their output, with read heads 24, 25 and n6 for reading the position of registration marks printed on the tape material 1 by each of the printing cylinders 6 to n1. The devices control 20, 21, 22 and n5 of the pressure cylinders 9, 10, 11 and n2 are controlled by a control circuit 26 which is connected on the one hand to a circuit for calculating the locating error 27 and on the other hand to a position calculation circuit angular 28 of the printing cylinders 6, 7, 8 and n1. The calculation circuit of angular position 28 also receives information from the generator 23 connected to each of the printing cylinders 6, 7, 8 and n1. The circuit of angular position calculation 28 is connected to the error calculation circuit of marking 27 which receives the information from the read heads 24, 25 and n6. The tracking error calculation circuit 27 produces information intended to be sent to a tracking regulator 31 which in turn will issue a information for the control circuit 32 of motors 18, 19 and n4 causing the displacement of the compensating rollers 12, 13 and n3.

    La figure 2 est une représentation schématique des organes d'une machine rotative d'impression sans rouleaux compensateurs, cela pour illustrer une application du procédé de phasage automatique à un autre type de machine rotative d'impression. Les divers composants que l'on peut trouver sur cette figure portent les mêmes signes de référence que ceux utilisés en rapport avec la figure 1, à l'exception de celui ayant trait à la commande en rotation des cylindres imprimeurs 6, 7, 8 et n1 puisque dans ce cas, les opérations de contrôle du repérage ne s'effectueront pas en déplaçant des rouleaux compensateurs mais en agissant directement sur la rotation des cylindres imprimeurs 6, 7, 8 et n1 par l'intermédiaire d'un circuit de commande 33 de la rotation des cylindres imprimeurs 6, 7, 8 et n1. A cet effet, il convient aussi dans ce cas d'associer un générateur d'impulsions 23 à chaque cylindre imprimeur 6, 7, 8 et n1. Pour ne pas charger inutilement la figure, seul un générateur d'impulsions 23 a été représenté ici, mais il est bien clair qu'il devrait y avoir autant de générateurs d'impulsions qu'il y a de cylindres imprimeurs. Ces générateurs d'impulsions sont généralement montés à l'une des extrémités de l'arbre de commande des cylindres imprimeurs.Figure 2 is a schematic representation of the organs of a rotary printing machine without compensating rollers, this to illustrate an application of the automatic phasing process to another type of rotary printing machine. The various components that can be found on this figure bear the same reference signs as those used in connection with figure 1, with the exception of that relating to the control in rotation printing cylinders 6, 7, 8 and n1 since in this case, the operations of tracking control will not be accomplished by moving rollers compensators but by acting directly on the rotation of the cylinders printers 6, 7, 8 and n1 via a control circuit 33 of the rotation of the printing cylinders 6, 7, 8 and n1. For this purpose, it is also appropriate in this case to associate a pulse generator 23 with each cylinder printer 6, 7, 8 and n1. To avoid unnecessary loading of the figure, only one pulse generator 23 has been shown here, but it is quite clear that it there should be as many pulse generators as there are cylinders printers. These pulse generators are generally mounted at one the ends of the print cylinder drive shaft.

    La figure 3 est une représentation schématique des organes d'une machine rotative d'impression au début de l'opération de mise en repérage automatique. Dans cette configuration initiale, tous les cylindres presseurs 9 à n2 sont en position haute, ce qui permet de mettre en place la bande de matière à imprimer 1 pincée à l'aval par la paire de rouleaux de traction 14, 15. Les cylindres imprimeurs 6 à n1 ont été insérés dans leur logement sans aucun repérage de leur position angulaire. Vu que les cylindres presseurs sont relevés, la bande à imprimer est dite blanche et ne comporte donc aucune impression même lorsqu'elle se met à défiler au-dessus des cylindres imprimeurs. Aucune information concernant la longueur du chemin de bande entre les groupes n'est nécessaire. Les rouleaux compensateurs 12 à n3 peuvent donc occuper une position quelconque bien qu'il soit recommandé de les centrer préalablement. Pour des raisons d'économie du support à imprimer, la bande défile préférentiellement à vitesse réduite durant toutes les phases nécessaires à la mise en repérage des impressions. Les têtes de lectures, qui peuvent être déplacées transversalement par rapport au sens de déplacement de la bande, ne doivent en outre pas être nécessairement positionnées sur la ligne de passage des marques de repérage.Figure 3 is a schematic representation of the organs of a rotary printing machine at the start of the tracking operation automatic. In this initial configuration, all the pressure rollers 9 to n2 are in the high position, which allows to put in place the strip of material to be printed 1 pinch downstream by the pair of traction rollers 14, 15. The printing cylinders 6 to n1 were inserted into their housing without any identification of their angular position. Since the pressure cylinders are read, the strip to be printed is said to be white and therefore does not contain any impression even when it starts to scroll above the cylinders printers. No information about the length of the tape path between groups is only necessary. Compensating rollers 12 to n3 can therefore occupy any position although it is recommended to center them beforehand. For reasons of economy of the print media, the strip preferably runs at reduced speed during all the phases necessary for tracking impressions. The read heads, which can be moved transversely to the direction of travel of the strip, must not necessarily be positioned on the line of marks.

    La figure 4 est une représentation schématique des organes d'une machine rotative d'impression dans la première phase de mise en repérage automatique. Dans cette première étape, où la bande à imprimer 1 défile préférentiellement à faible vitesse, le dernier cylindre presseur n2 est abaissé jusqu'à presser la bande à imprimer 1 contre le cylindre imprimeur correspondant n1. La tête de lecture n6 peut alors lire l'impression laissée sur la bande à imprimer 1, et détecter la marque de repérage du groupe n correspondant qui s'imprime en même temps que l'image du cliché ou du cylindre gravé. Une fois détectée, la localisation de cette marque de repérage peut être facilement mémorisée en enregistrant l'incrément du générateur d'impulsions correspondant à l'instant de la détection. Dans le cas où la marque de repérage n'aurait pas été détectée par la tête de lecture, un signal sera émis pour qu'elle soit déplacée transversalement jusqu'à s'aligner sur la ligne de défilement des marques de repérage. Un second signal sera reçu lorsque la tête occupera une position correcte. Parmi toute l'étendue de l'impression, seule la marque de repérage doit être détectée par la tête de lecture. Vu que la position de cette marque de repérage est immuable par rapport à l'image du cliché ou du cylindre gravé, et vu que cette même marque apparaít cycliquement dans le temps, une fenêtre de lecture peut alors être crée autour de cette marque de repérage pour éliminer tout le "bruit de fond" engendré par la lecture du reste de l'impression. Cette opération qui consiste à placer une fenêtre de lecture autour de la marque de repérage est dénommée opération de phasage.Figure 4 is a schematic representation of the organs of a rotary printing machine in the first phase of tracking automatic. In this first step, where the strip to be printed 1 scrolls preferably at low speed, the last pressure cylinder n2 is lowered until pressing the strip to be printed 1 against the printing cylinder correspondent n1. The read head n6 can then read the impression left on the strip to be printed 1, and detect the registration mark of group n correspondent who prints at the same time as the image of the photo or engraved cylinder. Once detected, the location of this registration mark can be easily memorized by recording the generator increment of pulses corresponding to the instant of detection. In case the registration mark would not have been detected by the read head, a signal will be issued so that it is moved transversely until it aligns with the scrolling marks. A second signal will be received when the head occupies a correct position. Among all the extent of printing, only the registration mark should be detected by the reading. Since the position of this registration mark is immutable by compared to the image of the plate or the engraved cylinder, and seeing that this same mark appears cyclically over time, a reading window can then be creates around this registration mark to eliminate all "background noise" generated by reading the rest of the print. This operation which consists of placing a reading window around the registration mark is called phasing operation.

    La figure 5 montre un diagramme représentant cette opération de phasage qui généralement se déroulera successivement d'aval en amont dans tous les groupes imprimeurs d'une manière indépendante. Concrètement, l'opération de phasage du groupe imprimeur n s'effectue de la manière suivante: le nombre d'impulsions, délivrées par le générateur d'impulsions 23, est tout d'abord compté depuis une origine relative propre au cylindre imprimeur correspondant, jusqu'à ce que ladite marque de repérage 36 soit détectée par la tête de lecture n6. Ce nombre d'impulsions correspond à la rotation nécessaire du cylindre imprimeur n1 jusqu'à l'apparition de ladite marque de repérage 36 en face de la tête de lecture n6. La détection de cette marque de repérage entraínera aussitôt la mémorisation de l'incrément du générateur d'impulsions à cet instant, admettons l'incrément numéro deux cent si le générateur d'impulsions en comprend par exemple 3600 pour un tour de cylindre. Par le biais d'un circuit électronique, on créera une fenêtre de lecture 35 autour de la marque de repérage 36 du groupe n et on mémorisera la position de cette fenêtre de lecture 35 en enregistrant les numéros d'incréments, par exemple l'incrément numéro cent cinquante et l'incrément deux cent cinquante du générateur d'impulsions, correspondant au début 37 et à la fin 38 de la fenêtre de lecture 35. L'opération de phasage automatique sera ainsi réalisée tout en garantissant que la marque de repérage se trouvera toujours à l'intérieur de la fenêtre de lecture correspondante.Figure 5 shows a diagram representing this operation of phasing which generally will take place successively from downstream to upstream in all printing groups independently. Concretely, the phasing operation of the printing unit n is carried out in the manner next: the number of pulses, delivered by the pulse generator 23, is first counted from a relative origin specific to the cylinder corresponding printer, until said registration mark 36 is detected by the read head n6. This number of pulses corresponds to the necessary rotation of the printing cylinder n1 until the appearance of said registration mark 36 opposite the read head n6. Detection of this registration mark will immediately result in the memorization of the increment of the pulse generator at this point let's assume the increment number two hundred if the pulse generator includes for example 3600 for a revolution of cylinder. Through an electronic circuit, we will create a reading window 35 around the marking mark 36 of group n and we will memorize the position of this reading window 35 by recording the numbers increments, for example the increment number one hundred and fifty and the increment two hundred and fifty of the pulse generator, corresponding to the beginning 37 and at the end 38 of the reading window 35. The automatic phasing operation will be achieved while ensuring that the registration mark is found always inside the corresponding reading window.

    Les figures 6 et 7 sont des représentations schématiques des organes d'une machine rotative d'impression, respectivement dans la deuxième et la troisième phase de l'opération de mise en repérage automatique. Ces deux étapes se déroulent d'une manière parfaitement identique au procédé décrit pour la première phase de la mise en repérage automatique. Ainsi, les cylindres presseurs 11 et 10 sont abaissés successivement une fois que, pour chacun d'eux, l'étape qui les précède est entièrement achevée. De ce fait, pour chacun des groupes imprimeurs suivant 4 et 5 équipés de têtes de lecture 24, 25, l'opération de phasage est réalisée avec une bande à imprimer 1 ne comportant qu'une seule impression, celle du groupe imprimeur de l'étape en question. Cet avantage résulte du sens opposé selon lequel les cylindres presseurs sont successivement abaissés par rapport au sens de défilement de la bande à imprimer. Les têtes de lecture n'ont donc aucune peine à détecter la marque de repérage 36 du groupe en question, et l'opération de phasage et la mémorisation de la position de la fenêtre de lecture 35 ouverte autour des marques de repérage 36 peut être réalisée successivement pour chacun de ces groupes imprimeurs sans risque qu'une telle marque de repérage se perde dans une regrettable superposition d'impressions.Figures 6 and 7 are schematic representations of organs of a rotary printing machine, respectively in the second and third phase of the tracking operation automatic. These two stages take place in a perfectly identical to the process described for the first phase of tracking automatic. Thus, the pressure cylinders 11 and 10 are lowered successively once, for each of them, the step preceding them is fully completed. Therefore, for each of the following printer groups 4 and 5 fitted with read heads 24, 25, the phasing operation is carried out with a printing strip 1 comprising only one printing, that of the printing group of the stage in question. This advantage results from the opposite direction according to which the pressure rollers are successively lowered relative to in the direction of travel of the strip to be printed. The read heads therefore no trouble detecting the mark 36 of the group in question, and the phasing operation and the memorization of the position of the reading window 35 open around registration marks 36 can be made successively for each of these printing groups without the risk that such a registration mark is lost in a regrettable overlap impressions.

    Dans le cas où toutes les têtes de lecture seraient déjà correctement positionnées dès le début de la première opération de la mise en repérage automatique, il est à noter que l'opération de phasage peut être réalisée en une seule et même étape en abaissant simultanément les cylindres presseurs 10 à n2 de tous les groupes imprimeurs concernés. En effet, si les têtes de lecture sont déjà correctement positionnées, elles ne manqueront en aucun cas de détecter la marque de repérage du groupe imprimeur qui leur est associé.In case all the read heads are already correctly positioned from the start of the first operation of setting automatic tracking, it should be noted that the phasing operation can be performed in a single step by simultaneously lowering the cylinders pressers 10 to n2 of all the printing groups concerned. Indeed, if the read heads are already correctly positioned, they will not fail no case of detecting the marking mark of the printing unit which is their associated.

    Dans le cas où un ou plusieurs groupes imprimeurs déposeraient sur la bande à imprimer des films sans pigment, tels que des vernis, les marques de repérage seraient en conséquence invisibles et non détectables par lesdites têtes de lecture. Pour pallier ce problème qui affecte évidemment l'opération de phasage telle que décrite, une solution simple consiste à phaser par défaut les cylindres imprimeurs de ces groupes vernisseurs en les plaçant initialement dans une position angulaire repérée; par exemple à 12h00. L'opération de phasage d'un tel groupe imprimeur ayant donc été exécutée par défaut, l'abaissement du cylindre presseur de ce groupe imprimeur peut alors être effectué en même temps que l'abaissement du cylindre presseur du groupe imprimeur adjacent suivant, situé en amont.In the event that one or more printing groups deposit pigment-free films, such as varnishes, registration marks would therefore be invisible and undetectable by said read heads. To overcome this problem which obviously affects the phasing operation as described, a simple solution consists in phasing by default the printing cylinders of these varnishing groups by placing them initially in a marked angular position; for example at 12 noon. The phasing operation of such a printing unit having therefore been carried out by fault, the lowering of the pressure cylinder of this printing unit can then be carried out at the same time as the lowering of the pressure cylinder next adjacent printing unit, located upstream.

    La figure 8 illustre schématiquement les organes d'une machine rotative d'impression durant la quatrième phase de démarrage. Le phasage ayant été effectué, les cylindres presseurs 10 à n2 sont amenés en position relevée, ce qui aura pour effet d'ôter les impressions des groupes imprimeurs 4 à n qui ne seront plus en mesure d'imprimer le motif de leur cliché ou de leur cylindre gravé sur la bande à imprimer 1. Seul le premier cylindre presseur 9, situé le plus en amont, est abaissé préférentiellement en même temps mais pas avant que les autres cylindres presseurs soient relevés. Par conséquent, seule la marque de repérage du groupe imprimeur 3 sera imprimée sur la bande de matière 1. Dans la fenêtre de lecture, précédemment définie pour chaque groupe imprimeur 4 à n, on créera électroniquement une marque de repérage virtuelle 39 dont la position se situera au milieu de la fenêtre de lecture 35.Figure 8 schematically illustrates the components of a machine printing press during the fourth start-up phase. Phasing having been carried out, the pressure rollers 10 to n2 are brought into position raised, which will have the effect of removing the prints from the printing groups 4 to n who will no longer be able to print the reason for their photo or cylinder engraved on the strip to be printed 1. Only the first pressure cylinder 9, located further upstream, is lowered preferentially at the same time but not before the other pressing cylinders are raised. Therefore, only the marking mark of the printing unit 3 will be printed on the material strip 1. In the reading window, previously defined for each printing group 4 to n, we will electronically create a brand of virtual location 39 whose position will be in the middle of the window reading 35.

    La figure 9 montre l'utilité d'une telle marque de repérage virtuelle 39 dans un diagramme représentant l'opération de calcul de l'erreur de repérage 41 dans un mode appelé "marque - cylindre". La position de la marque de repérage virtuelle 39 est mémorisée durant l'opération de phasage ou calculée avec les incréments connus 37, 38 correspondant au début et à la fin de la fenêtre de lecture 35. Ensuite, à l'aide de la tête de lecture 24 du groupe imprimeur 4, on détectera la marque de repérage 40 laissée par le premier groupe imprimeur 3 situé le plus en amont. L'erreur de repérage 41 entre la marque virtuelle 39 et la marque de repérage 40 du premier groupe imprimeur 3 peut donc être aisément déterminée par soustraction des incréments mémorisés. Le but de cette correction étant de faire coïncider la marque de repérage 40 du premier groupe imprimeur 3 avec la marque de repérage virtuelle 39. Physiquement, la correction de cette erreur de repérage 41 s'effectue, pour le groupe imprimeur 4, par déplacement du rouleau compensateur 12 situé juste à l'amont de ce groupe imprimeur 4 (fig. 10). Cette correction engendre un déplacement en sens opposé du rouleau baladeur ou un autre effet compensatoire sur une autre unité de contrôle liée à l'organe de tension 16. Etant donné que la bande à imprimer 1 n'est pincée à l'amont que par le groupe imprimeur 3 et à l'aval que par la paire de rouleaux de traction 14, 15, la correction de l'erreur de repérage 41 s'effectue à tension constante sans engendrer une élévation ou une baisse de tension de la bande à imprimer 1. Cette opération est rendue possible du fait que la bande de matière n'est pas entraínée par pincement le long du cheminement compris entre le rouleau compensateur 12 en question et les rouleaux de traction 14, 15. Pour le groupe imprimeur 4, ce repérage que nous appelons repérage "marque - cylindre" est donc réalisé.Figure 9 shows the usefulness of such a virtual registration mark 39 in a diagram representing the operation of calculating the error of marking 41 in a mode called "cylinder mark". The position of the virtual registration mark 39 is memorized during the phasing operation or calculated with known increments 37, 38 corresponding to the start and to the end of the reading window 35. Then, using the reading head 24 of the printing unit 4, we will detect the registration mark 40 left by the first printing unit 3 located furthest upstream. The locating error 41 between virtual mark 39 and registration mark 40 of the first group printer 3 can therefore be easily determined by subtracting the memorized increments. The purpose of this correction is to make the registration mark 40 of the first printing group 3 with the marking of virtual tracking 39. Physically, correcting this tracking error 41 is carried out, for the printing unit 4, by displacement of the roller compensator 12 located just upstream of this printing unit 4 (fig. 10). This correction generates a displacement in the opposite direction of the wandering roller or another compensatory effect on another control unit linked to the tension 16. Since the printing strip 1 is only pinched upstream by the printing unit 3 and downstream only by the pair of traction rollers 14, 15, the correction of the marking error 41 is carried out at constant voltage without raising or lowering the tension of the web to be printed 1. This operation is made possible because the strip of material is not entrained by pinching along the path between the roller compensator 12 in question and the traction rollers 14, 15. For the group printer 4, this marking which we call "mark - cylinder" marking is therefore realized.

    La figure 10 montre une représentation schématique des organes d'une machine rotative d'impression dans la cinquième phase de l'opération de mise en repérage automatique. A ce stade, la première marque de repérage 40 imprimée par le premier groupe imprimeur 3 arrive maintenant au niveau du deuxième rouleau compensateur 13, situé entre les groupes imprimeurs 4 et 5. Le cylindre presseur 10 du deuxième groupe imprimeur 4 s'abaisse, et l'image du cylindre imprimeur 7 s'imprime sur la bande à imprimer 1 avec la marque de repérage correspondante 36 laissée par le groupe imprimeur 4.Figure 10 shows a schematic representation of the organs of a rotary printing machine in the fifth phase of the operation of automatic tracking. At this point, the first registration mark 40 printed by the first printing group 3 now arrives at the level of second compensating roller 13, located between the printing units 4 and 5. The pressing cylinder 10 of the second printing unit 4 is lowered, and the image of the printing cylinder 7 is printed on the printing tape 1 with the mark of corresponding marking 36 left by the printing unit 4.

    La figure 11 montre un diagramme représentant l'opération de calcul de l'erreur de repérage résiduelle 42 dans un mode plus fin appelé "marque - marque". Les opérations de phasage et de calcul de l'erreur de repérage 41 en mode "marque-cylindre" ayant été réalisées pour tous les groupes imprimeurs, les marques de repérage 40 et 36 des groupes respectifs 3 et 4 apparaissent donc dans la même fenêtre de lecture 35 lue par la tête de lecture 24. Cependant, en raison de différentes causes variables affectant sensiblement le support imprimé (degré d'humidité, homogénéité de la bande et autres conditions ambiantes de travail), cette bande peut être sujette à de petits allongements qui engendrent en conséquence un léger décalage de la marque de repérage 36 par rapport à la marque de repérage 40 du premier groupe imprimeur 3 utilisée comme référence. Le système conventionnel de contrôle du repérage, comme par exemple celui décrit dans le brevet CH 539 509, permettra de corriger cette erreur de repérage résiduelle 42 en agissant par exemple sur le circuit de commande 32 des moteurs qui pilotent les déplacements des rouleaux compensateurs ou en agissant sur le circuit de commande 33 pilotant la rotation des cylindres imprimeurs.Figure 11 shows a diagram representing the operation of calculation of the residual locating error 42 in a finer mode called "brand - brand". Phasing and error calculation operations marking 41 in "cylinder mark" mode having been carried out for all printing groups, registration marks 40 and 36 of the respective groups 3 and 4 therefore appear in the same reading window 35 read by the head of reading 24. However, due to different variable causes affecting substantially the printed medium (degree of humidity, homogeneity of the strip and other ambient working conditions), this tape may be subject to small elongations which consequently cause a slight shift in the registration mark 36 relative to registration mark 40 of the first printing unit 3 used as a reference. The conventional system of control of the location, such as that described in patent CH 539 509, will correct this residual tracking error 42 by acting for example on the control circuit 32 of the motors which drive the displacements of the compensating rollers or by acting on the circuit control 33 controlling the rotation of the printing cylinders.

    La figure 12 donne une représentation schématique des organes d'une machine rotative d'impression dans la sixième phase de l'opération de mise en repérage automatique. Cette sixième étape se déroule selon le même principe qui a été décrit précédemment par les figures 10 et 11. La première marque de repérage 40, imprimée par le premier groupe imprimeur 3, arrive maintenant au niveau du prochain groupe imprimeur 5. Les opérations de calcul et de correction de l'erreur "marque - cylindre" peuvent être effectuées pour le groupe imprimeur 5 de la même façon qu'elles ont été effectuées pour le groupe imprimeur précédent. A ce stade, l'impression précédente issue du groupe imprimeur 4 ne se trouve quant à elle qu'au niveau du deuxième rouleau compensateur 13. Ainsi, dans une même suite d'opérations, lorsque le cylindre presseur 11 s'abaisse, l'impression laissée par le cylindre imprimeur précédent 7 n'est pas encore parvenue au niveau du groupe imprimeur 5 en question. De ce fait, l'image du cylindre imprimeur 8 correspondant s'imprime avec sa marque de repérage 36 sur la bande à imprimer 1 qui, à cet endroit, n'est marquée que de la première impression comprenant la marque de repérage 40 laissée par le premier cylindre imprimeur 6. Les opérations de calcul et de correction de l'erreur de repérage résiduelle 42 dans le mode "marque - marque" peuvent être entreprises après détection par la tête de lecture 25 de la marque de repérage 40 faisant référence, et de la marque de repérage 36 du groupe 5 en question.Figure 12 gives a schematic representation of the organs of a rotary printing machine in the sixth phase of the operation of automatic tracking. This sixth stage takes place according to the same principle which has been described previously by FIGS. 10 and 11. The first registration mark 40, printed by the first printing unit 3, arrives now at the level of the next printing unit 5. The operations of calculation and correction of the "brand - cylinder" error can be performed for printing unit 5 in the same way as they were done for the previous printer group. At this point, the previous impression from printing unit 4 is only found on the second level compensating roller 13. Thus, in the same sequence of operations, when the pressure cylinder 11 lowers, the impression left by the printing cylinder previous 7 has not yet reached the level of the printing group 5 in question. As a result, the image of the corresponding printing cylinder 8 is printed. with its registration mark 36 on the printing strip 1 which, at this point, is only marked with the first impression including the brand of marking 40 left by the first printing cylinder 6. The operations of calculation and correction of the residual tracking error 42 in the mode "mark - mark" can be undertaken after detection by the head of reading 25 of the reference mark 40 making reference, and of the mark of location 36 of group 5 in question.

    La figure 13 est une représentation schématique des organes d'une machine rotative d'impression dans la dernière phase de la mise en repérage automatique. D'une façon similaire, on procédera aux opérations de calcul en mode "marque - cylindre" entre la marque de repérage 40 du premier cylindre imprimeur 6 et la marque de repérage virtuelle 39 déterminée et mémorisée après le phasage. Puis, après avoir appliqué les valeurs de correction au rouleau compensateur n3, on procédera aux calculs et corrections de l'erreur de repérage résiduelle 42 dans le mode "marque-marque" entre la marque de repérage 40 du premier cylindre imprimeur 6 et la marque de repérage 36 du groupe imprimeur n en question. Une fois que ces corrections ont été effectuées, toutes les couleurs sont en repérage les unes par rapport aux autres et le processus de mise en repérage automatique se termine. La machine rotative d'impression peut donc, le cas échéant, fonctionner maintenant à son régime permanent où la bande à imprimer 1 peut alors défiler à haute vitesse.Figure 13 is a schematic representation of the organs of a rotary printing machine in the last phase of the implementation automatic tracking. In a similar way, we will proceed to the operations of calculation in "mark - cylinder" mode between the marking mark 40 of the first printing cylinder 6 and the virtual registration mark 39 determined and memorized after phasing. Then, after applying the values of correction with compensating roller n3, we will proceed to the calculations and correction of residual marking error 42 in "brand-brand" mode between the registration mark 40 of the first printing cylinder 6 and the registration mark 36 of the printing group n in question. Once these corrections have been made, all the colors are in tracking compared to others and the auto tracking process takes finished. The rotary printing machine can therefore, if necessary, now run at steady state where the print tape 1 can then scroll at high speed.

    Il va de soi que le nombre de phases ou d'étapes données dans cette description dépend du nombre de groupes imprimeurs utilisés pour réaliser les travaux d'impression souhaités. Toutefois, la méthode employée reste dans tous les cas inchangée. En présence de plusieurs impressions de la même couleur, l'utilisation d'un code ou d'une reconnaissance de la forme de la marque pourrait être proposée pour assurer la bonne détection des marques de repérage dans le cours de ce processus.It goes without saying that the number of phases or stages given in this description depends on the number of printing units used for carry out the desired print jobs. However, the method used remains in all cases unchanged. In the presence of several impressions of the same color, the use of a code or a recognition of the shape of the brand could be proposed to ensure the proper detection of brands in the course of this process.

    De nombreuses améliorations peuvent être apportées à l'objet de cette invention dans le cadre des revendications.Many improvements can be made to the object of this invention within the scope of the claims.

    Claims (11)

    Procédé pour la mise en repérage automatique d'impressions laissées par des cylindres imprimeurs (6, 7, 8, n1) dans une machine rotative utilisant des encres de plusieurs couleurs et comprenant notamment une succession de groupes imprimeurs (3, 4, 5, n) respectivement placés et repérés d'amont en aval en référence au sens de déplacement (2) d'une bande à imprimer (1), au moins un générateur d'impulsions (23), deux rouleaux de traction (14, 15) situés à l'aval desdits groupes imprimeurs (3, 4, 5, n), des rouleaux compensateurs (12, 13, n3) utilisés avec les cylindres imprimeurs (7, 8, n1) pour corriger des erreurs de repérage (41, 42) mises en évidence par le biais de marques de repérage (36, 40) imprimées sur la bande (1) lors de l'abaissement de cylindres presseurs (9, 10, 11, n2) contre lesdits cylindres imprimeurs, des têtes de lecture (24, 25, n6) placées chacune à proximité et à l'aval des groupes imprimeurs respectifs (4, 5, n), chacun des groupes imprimeurs (3, 4, 5, n) comprend notamment un desdits cylindres imprimeurs (6, 7, 8, n1) ainsi qu'un desdits cylindres presseurs (9, 10, 11, n2) dont chacun d'eux est piloté par un des dispositifs de commande (20, 21, 22, n5), caractérisé en ce qu'il contient les étapes respectives suivantes: a) l'abaissement du dernier cylindre presseur (n2), b) un alignement de la tête de lecture (n6) du groupe imprimeur (n) de façon à ce qu'elle se trouve à la verticale du passage successif des marques de repérage (36) laissées par le cylindre imprimeur (n1), c) une opération dite de phasage du groupe imprimeur (n), d) une répétition des étapes successives a), b), c) pour tous les groupes imprimeurs, successivement d'aval en amont, à l'exception du premier groupe imprimeur (3) situé le plus en amont, e) un relèvement de tous les rouleaux presseurs (10, 11, n2) qui ont été précédemment abaissés, et un abaissement du premier rouleau presseur (9) au plus tôt une fois que tous lesdits rouleaux presseurs (10, 11, n2) se relèvent, f) une détermination de l'erreur de repérage (41) dans un mode dit "marque-cylindre", g) une correction, à tension de bande (1) constante, de l'erreur de repérage (41) à l'aide d'un rouleau compensateur (12, 13, n3) ou cylindre imprimeur (7, 8, n1,), h) une détermination d'une erreur de repérage résiduelle (42) dans un mode dit "marque-marque", i) une correction de l'erreur de repérage résiduelle (42) à l'aide d'un rouleau compensateur (12, 13, n3) ou cylindre imprimeur (7, 8, n1,), j) une répétition des étapes successives f), g), h), i) pour tous les groupes imprimeurs, successivement d'amont en aval, à compter du second groupe imprimeur (4). Method for automatically locating prints left by printing cylinders (6, 7, 8, n1) in a rotary machine using inks of several colors and comprising in particular a succession of printing groups (3, 4, 5, n ) respectively placed and marked from upstream to downstream with reference to the direction of movement (2) of a printing web (1), at least one pulse generator (23), two traction rollers (14, 15) located downstream of said printing units (3, 4, 5, n), compensating rollers (12, 13, n3) used with the printing cylinders (7, 8, n1) to correct registration errors (41, 42) highlighted by marking marks (36, 40) printed on the strip (1) when lowering press rolls (9, 10, 11, n2) against said print rolls, read heads (24 , 25, n6) each placed near and downstream of the respective printing groups (4, 5, n), each of the groups prints urs (3, 4, 5, n) comprises in particular one of said printing cylinders (6, 7, 8, n1) as well as one of said pressing cylinders (9, 10, 11, n2) each of which is controlled by a control devices (20, 21, 22, n5), characterized in that it contains the following respective steps: a) lowering of the last pressing cylinder (n2), b) an alignment of the read head (n6) of the printing unit (n) so that it is vertical to the successive passage of the registration marks (36) left by the printing cylinder (n1), c) a so-called phasing operation of the printing unit (n), d) a repetition of the successive steps a), b), c) for all the printing groups, successively from downstream to upstream, with the exception of the first printing group (3) located most upstream, e) raising all the pressure rollers (10, 11, n2) which have been previously lowered, and lowering the first pressure roller (9) as soon as possible after all said pressure rollers (10, 11, n2) have fall under, f) a determination of the locating error (41) in a so-called "cylinder mark" mode, g) a correction, at constant web tension (1), of the registration error (41) using a compensating roller (12, 13, n3) or printing cylinder (7, 8, n1,) , h) a determination of a residual tracking error (42) in a so-called "brand-brand" mode, i) a correction of the residual marking error (42) using a compensating roller (12, 13, n3) or printing cylinder (7, 8, n1,), j) a repetition of the successive steps f), g), h), i) for all the printing groups, successively from upstream to downstream, from the second printing group (4). Procédé selon la revendication 1, caractérisé en ce que l'opération de phasage consiste à placer électroniquement, à l'aide d'incréments fournis par le générateur d'impulsions (23), une fenêtre de lecture (35) autour de ladite marque de repérage (36), et à déterminer et mémoriser la valeur de l'incrément qui correspond à la position occupée par la marque de repérage (36) pour définir une marque de repérage virtuelle (39).Method according to claim 1, characterized in that the phasing operation consists in electronically placing, using increments provided by the pulse generator (23), a reading window (35) around said marking mark. location (36), and determining and storing the value of the increment which corresponds to the position occupied by the location mark (36) to define a virtual location mark (39). Procédé selon la revendication 1, caractérisé en ce que la détermination de l'erreur de repérage (41) des cylindres imprimeurs (10, 11, n2) dans le mode dit "marque-cylindre" consiste à détecter, à l'aide de la tête de lecture du groupe imprimeur concerné, la marque de repérage (40) laissée par le premier groupe imprimeur (3), puis à déterminer l'écart existant entre ladite marque de repérage (40), utilisée comme référence, et la marque de repérage virtuelle (39).Method according to claim 1, characterized in that the determination of the marking error (41) of the printing cylinders (10, 11, n2) in the so-called "cylinder mark" mode consists in detecting, using the read head of the printing group concerned, the registration mark (40) left by the first printing group (3), then to determine the difference existing between said registration mark (40), used as a reference, and the registration mark virtual (39). Procédé selon la revendication 1, caractérisé en ce que la détermination de l'erreur de repérage résiduelle (42) des cylindres imprimeurs (10, 11, n2) dans le mode dit "marque-marque" consiste à abaisser le cylindre presseur du groupe imprimeur concerné, puis à détecter à l'aide de la tête de lecture correspondante la marque de repérage (40) laissée par le premier groupe imprimeur (3), et enfin à déterminer l'écart existant entre la marque de repérage (40), utilisée comme référence, et la marque de repérage (36) laissée par le groupe imprimeur concerné.Method according to claim 1, characterized in that the determination of the residual marking error (42) of the printing cylinders (10, 11, n2) in the so-called "brand-brand" mode consists in lowering the pressing cylinder of the printing unit concerned, then detecting with the corresponding reading head the registration mark (40) left by the first printing unit (3), and finally determining the difference existing between the registration mark (40), used as a reference, and the registration mark (36) left by the printing group concerned. Procédé selon la revendication 4, caractérisé en ce que, durant la détermination de l'erreur de repérage résiduelle (42) dans le mode "marque-marque", seuls la marque de repérage (36) du groupe imprimeur concerné et la marque de repérage (40) du premier groupe imprimeur (3) peuvent être détectées par la tête de lecture dudit groupe imprimeur concerné.Method according to claim 4, characterized in that , during the determination of the residual registration error (42) in the "brand-mark" mode, only the registration mark (36) of the printing group concerned and the registration mark (40) of the first printing group (3) can be detected by the read head of said printing group concerned. Procédé selon la revendication 1, caractérisé en ce que les étapes a), b), c) peuvent être effectuées dans l'ordre simultanément pour tous les groupes imprimeurs adjacents (4, 5, n) dont les têtes de lecture sont déjà alignées avant que ne soit effectué l'abaissement des presseurs correspondants.Method according to claim 1, characterized in that steps a), b), c) can be carried out in order simultaneously for all the adjacent printing groups (4, 5, n) whose read heads are already aligned before that the corresponding pressers be lowered. Procédé selon la revendication 1, caractérisé en ce que tout cylindre imprimeur qui dépose sur la bande à imprimer (1) un film d'encre illisible sera initialement placé dans une position angulaire repérée.Method according to claim 1, characterized in that any printing cylinder which deposits an illegible ink film on the printing web (1) will initially be placed in an angular position marked. Procédé selon la revendication 1, caractérisé en ce que l'emploi de plus d'une marque de repérages (36, 40) par cylindre imprimeur peut conduire à l'utilisation d'un code se rapportant aux dites marques de repérage (36, 40) afin de pouvoir les différentier.A method according to claim 1, characterized in that the use of more than one registration mark (36, 40) per printing cylinder can lead to the use of a code relating to said registration marks (36, 40 ) in order to be able to differentiate them. Dispositif pour la mise en oeuvre du procédé selon la revendication 1, caractérisé en ce que les dispositifs de commande (20, 21, 22, n5) des cylindres presseurs (9, 10, 11, n2) sont pilotés par un circuit automatique de contrôle (26) relié à un circuit de calcul de l'erreur de repérage (27).Device for implementing the method according to claim 1, characterized in that the control devices (20, 21, 22, n5) of the pressure rollers (9, 10, 11, n2) are controlled by an automatic control circuit (26) connected to a circuit for calculating the tracking error (27). Dispositif selon la revendication 9, caractérisé en ce que tous les cylindres imprimeurs (6, 7, 8, n1) sont reliés à un seul et même générateur d'impulsions (23) lorsque seuls lesdits rouleaux compensateurs (12, 13, n3) sont utilisés pour corriger les erreurs de repérages (41, 42).Device according to claim 9, characterized in that all the printing cylinders (6, 7, 8, n1) are connected to a single pulse generator (23) when only said compensating rollers (12, 13, n3) are used to correct tracking errors (41, 42). Dispositif selon la revendication 9, caractérisé en ce que chaque cylindre imprimeur (6, 7, 8, n1) est équipé et relié à un générateur d'impulsions (23) lorsque seuls lesdits cylindres imprimeurs (7, 8, n1) sont utilisés pour corriger les erreurs de repérages (41, 42).Device according to claim 9, characterized in that each printing cylinder (6, 7, 8, n1) is equipped and connected to a pulse generator (23) when only said printing cylinders (7, 8, n1) are used for correct location errors (41, 42).
    EP01101322A 2000-02-10 2001-01-20 Method and means for automatically preregistering rotary printing machines Expired - Lifetime EP1132203B1 (en)

    Applications Claiming Priority (2)

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    CH00269/00A CH694219A5 (en) 2000-02-10 2000-02-10 A method of automatic registration of prints in a rotary machine and device for carrying out the method.
    CH2692000 2000-02-10

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    EP1132203A1 true EP1132203A1 (en) 2001-09-12
    EP1132203B1 EP1132203B1 (en) 2006-02-22

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    EP (1) EP1132203B1 (en)
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    EP2014470A1 (en) * 2007-07-13 2009-01-14 ELTROMAT GmbH Method and device for automatic regulation of the register between imprints in a multi-colour rotary printing press
    EP2343186A1 (en) * 2010-01-11 2011-07-13 Goss International Americas, Inc. Variable cutoff oscillating web printing press, and method
    CN102275376A (en) * 2010-01-11 2011-12-14 高斯国际美洲公司 Variable oscillating web printing press and method
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    JP2001239642A (en) 2001-09-04
    CH694219A5 (en) 2004-09-30
    CN1307972A (en) 2001-08-15
    EP1132203B1 (en) 2006-02-22
    TW480217B (en) 2002-03-21
    AU1830601A (en) 2001-08-16
    US6499397B2 (en) 2002-12-31
    JP3377990B2 (en) 2003-02-17
    KR100430448B1 (en) 2004-05-10
    DE60117308T2 (en) 2006-10-12
    KR20010082121A (en) 2001-08-29
    CA2334536A1 (en) 2001-08-10
    CA2334536C (en) 2005-04-26
    BR0100480B1 (en) 2009-01-13
    AU776188B2 (en) 2004-09-02
    ES2258990T3 (en) 2006-09-16
    US20010022143A1 (en) 2001-09-20
    DE60117308D1 (en) 2006-04-27
    BR0100480A (en) 2001-10-02
    CN1152780C (en) 2004-06-09
    ATE318211T1 (en) 2006-03-15

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