EP0997275B1 - Printing machine, incorporating at least one screen printing station and at least one digital ink jet printing station - Google Patents

Printing machine, incorporating at least one screen printing station and at least one digital ink jet printing station Download PDF

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Publication number
EP0997275B1
EP0997275B1 EP99402503A EP99402503A EP0997275B1 EP 0997275 B1 EP0997275 B1 EP 0997275B1 EP 99402503 A EP99402503 A EP 99402503A EP 99402503 A EP99402503 A EP 99402503A EP 0997275 B1 EP0997275 B1 EP 0997275B1
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EP
European Patent Office
Prior art keywords
station
printing
machine according
printing machine
endless conveyor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP99402503A
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German (de)
French (fr)
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EP0997275A1 (en
Inventor
Jean-Louis Dubuit
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Machines Dubuit SAS
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Machines Dubuit SAS
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/08—Machines
    • B41F15/0863—Machines with a plurality of flat screens mounted on a turntable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J25/00—Actions or mechanisms not otherwise provided for
    • B41J25/304—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
    • B41J3/407—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
    • B41J3/407—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material
    • B41J3/4078—Printing on textile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2215/00—Screen printing machines
    • B41P2215/50—Screen printing machines for particular purposes
    • B41P2215/55—Screen printing machines for particular purposes for printing compact discs

Definitions

  • the present invention relates generally to print of the kind comprising an endless conveyor that carries, from place to place place, a plurality of object carriers, and at least one printing station silk screen, which, placed in line with the path of the object-holder, is adapted to ensure in turn the printing of objects carried by them, see for example DE C-3820340.
  • Silkscreen printing stations have many advantages, which make them appreciated for the printing of very diverse articles, and, for that of compact discs.
  • the screen printing stations have the disadvantage to require, before their start, a setting in position of their screen of silk, to adjust the position of the impression provided by it in relation to the surface to be printed and, where appropriate, that is to say when a color change, cleaning the squeegee and counter-squeegee associated with this silk screen.
  • the corresponding start-up time can for example reach several minutes.
  • the present invention generally relates to a provision likely to minimize this disadvantage.
  • a printing machine of the a kind with an endless conveyor which carries, from place to place, a plurality of object holders, and at least one printing station screenprint placed directly above the path of these object-holders, this printing machine being generally characterized in that also includes at least one digital printing station, which works by inkjet, and which is intended to intervene on demand.
  • Inkjet-based digital printing stations are well known by themselves, and they have the advantages, on the one hand, of operating directly, without using any accessory, such as screen, snapshot or other, and thus allowing the economy of such an accessory, and, on the other hand, to be able to ensure, by themselves, the impression of several colors, without requiring any specific adjustment for each of them.
  • the arrangement according to the invention leads to advantageously to the maintenance of an acceptable productivity for this machine to print, even when the number of articles to be printed is relatively weak.
  • this provision which combines a digital printing station ink jet operation at a screen printing station, is all the more advantageous as, inkjet printing requiring the presence, on the objects to be printed, of a layer of absorbent material or varnish, this layer of absorbent material or varnish can easily be applied to these objects at a screen printing station.
  • the next printing machine 10 the invention comprises, generally, in a manner known per se, a conveyor 11, which carries, from place to place, a plurality of object holders 13, and at least one screen printing station 14 disposed vertically above path of these object holders 13.
  • This printing machine 10 does not, of itself, belong to the present invention, it will not be described in all its details here.
  • the endless conveyor 11 it will suffice to indicate that, in the embodiment shown, it is formed, by way of example, by a circular contour plate rotatably mounted on a frame 12, in the manner of a turret, and that the object holders 13 that it carries are distributed circularly at a regular pitch around the axis of rotation A of this plate.
  • the screen printing station 14 it will suffice, correspondingly, to recall that, in a manner known per se, it implements a silk screen forming stencil, some of the stitches are free and others closed, depending on the impression to be made, and that, on this screen of silk, is associated a squeegee, which, mounted mobile for this purpose, is suitable, in particular, to force ink to pass through his free meshes.
  • screen printing stations 14 are distributed around the endless conveyor 11, at the rate of one printing station screen printing 14 per color to be applied to the articles to be printed.
  • each screen printing station 14 thus implemented is usually associated with a drying station, not represent.
  • positions may also be provided along the endless conveyor 11, such as, for example, a loading and / or unloading, a dedusting station, and a post flaming.
  • the printing machine 10 also comprises the least one digital printing station 15, which operates by inkjet, and which is intended to intervene on demand.
  • this digital printing station 15 is associated with a printing station screenprint 14, and is suitable for being substituted therefor.
  • the printing station screen printing 14 which is thus associated with a digital printing station 15 is retractable.
  • the silk-screen printing stations 14 other than that to which the digital print station 15 can be substituted are not, them, necessarily retractable.
  • the printing station screen printing 14 to which is associated the digital printing station 15 is movably mounted between a service position, which is relatively close to the endless conveyor 11, and for which it is able to intervene, FIG. standby position, which is relatively far away from the endless conveyor 11, and for which he leaves between him and him a sufficient space for the digital printing station 15 can be implanted in its place, FIGS. 4A and 4B.
  • the position screen printing device 14 is slidably mounted on at least one column 18, which extends substantially perpendicular to the endless conveyor 11.
  • two columns 18 are provided, parallel to each other, at a distance from each other.
  • the digital printing station 15 is globally movable between a waiting position, for which it is removed from the endless conveyor 11, FIGS. 1 and 4A, and a service position, for which, in substitution for the silk-screen printing station 14, is the plumb course of the object-carrying supports 13 carried by this conveyor without end 11, FIG. 4B.
  • the position digital printing device 15 is slidably mounted on at least one rail 20, which extends substantially parallel to the endless conveyor 11.
  • two rails 20 are parallel to each other at a distance from one another.
  • the printing station digital 15 is carried by a frame 21 independent, that is to say by a frame 21 separate from the frame 12 carrying the endless conveyor 11 and the printing station screen printing 14.
  • this frame 21 is equipped with wheels 22, for its approach of the frame 12, and the rails 20, which are supported by this frame 21, allow if necessary a finer adjustment of the position of the post of digital printing 15 relative to the frame 12, substantially parallel to the endless conveyor 11.
  • the printing station digital device 15 is further mounted adjustable in substantially perpendicular to the endless conveyor 11.
  • this embodiment is mounted sliding on at least one amount 24, which extends substantially perpendicular to the endless conveyor 11, and which is carried by a carriage 25 mounted movably on the rails 20.
  • two amounts 24 are provided, parallel to each other, at a distance from each other.
  • the printing station numeral 15 comprises a cross member 27, which, in the manner of an X-Y table, is mounted according to two orthogonal directions D1, D2, such as schematized by double arrows in Figure 2, and which carries at least one print head 28.
  • one of the directions D1, D2 of mobility of this cross 27, in this case the direction D1, is substantially tangential to the tray forming the endless conveyor 11, and the other, and therefore, in this case, the direction D2, is substantially radial with respect thereto.
  • the cross member 27 of the digital printing station 15 is slidingly mounted on at least one slide 29 which belongs to a carriage 30 itself slidable on at least one slide 31 orthogonal to the previous slide 29.
  • the carriage 30 is somehow suspended the slides 31, and the crossbar 27 is on the slides 29.
  • the cross member 27 is engaged by a nut 32, with a screw 33 set on the output shaft of a motor 34, and likewise the carriage 30 is engaged by a nut 35 with a screw 36 keyed on the output shaft an engine 37.
  • the cross member 27 of the station of digital printing 15 extends substantially tangentially relative to to the plate forming the endless conveyor 11, in the direction D1.
  • this cross 27 carries at least two heads 28, which are staggered along its length, and which are shifted transversely relative to each other along its width, from in order to take into account the radius of the circumference according to which the holders 13 extend.
  • the crossbar 27 thus carries, remotely of the other, four printheads 28, and these are established next a step which corresponds substantially to the pitch of the object-bearing supports 13 on the endless conveyor 11.
  • the print heads 28 act as nacelles on the lower surface of the crossbar 27, and each of them bears, itself, on its own lower surface, at least two print nozzles 39.
  • the carriage 30 of the station digital printing device 15 comprises, at one of the ends of the slides 29, a housing 40, for housing a clean cleaning device to ensure the cleaning the print nozzles 39.
  • the screen printing station 14 In normal operation, the screen printing station 14 is in the service position, and the digital printing station 15 is in position Wait.
  • the printing station screenprint 14 is raised to the standby position, and in its place is inserted, under him, in space 16 that he leaves free between him and the endless conveyor 11, the digital printing station 15, as shown in Figure 4B.
  • the printing station digital device 15 provided according to the invention cooperates with at least two supports 13 and, in the present case, with four, with the aid of a 13 per print head 28, intervening simultaneously on the objects to print carried by these object holders 13, while a post screen printing 14 only cooperates with a single support article 13
  • the printing station digital 15 when it is in use, it intervenes, simultaneously, with at least one another screen printing station 14, if, as envisaged above, the printing machine 10 has one or more printing stations screenprint 14 in addition to the one with which this printing station is associated digital 15.
  • modulation means are intended to allow, thus, effectively, to the printing station to intervene, at least momentarily, simultaneously with less another silk screen printing station 14.
  • modulation means result, in particular, from this that the control means of the screen printing station (s) 14 are decoupled from the control means of the endless conveyor 11.
  • modulation means result, in particular, that the control means of the or posts screen printing device 14 and the control means of the station 15 digital printing are distinct.
  • control means of the endless conveyor 11 are preferably variable speed, to allow printing in serigraphy at a rate normal when possible, and an inkjet print at a rate slower when necessary.
  • machine to print according to the invention may be subject to implementing rules very diverse.
  • the digital printing station ink jet can be associated with the digital printing station ink jet, one or more other items, such as, for example, for example, at least one varnishing station, for example a printing station silkscreen, and at least one drying station.
  • the configuration of the endless conveyor implemented is indifferent.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Screen Printers (AREA)
  • Ink Jet (AREA)

Description

La présente invention concerne d'une manière générale les machines à imprimer du genre comportant un convoyeur sans fin qui porte, de place en place, une pluralité de supports porte-objet, et au moins un poste d'impression sérigraphique, qui, disposé à l'aplomb du trajet des supports porte-objet, est apte à assurer tour à tour l'impression des objets portés par ceux-ci, voir par exemple DE C-3 820 340.The present invention relates generally to print of the kind comprising an endless conveyor that carries, from place to place place, a plurality of object carriers, and at least one printing station silk screen, which, placed in line with the path of the object-holder, is adapted to ensure in turn the printing of objects carried by them, see for example DE C-3820340.

Les postes d'impression sérigraphique ont de nombreux avantages, qui les font apprécier pour l'impression d'articles très divers, et, par exemple, pour celle de disques compacts.Silkscreen printing stations have many advantages, which make them appreciated for the printing of very diverse articles, and, for that of compact discs.

En particulier, ils sont avantageusement susceptibles de cadences de travail relativement élevées, de l'ordre par exemple d'un disque compact par seconde, parce que, l'écran de soie qu'ils mettent en oeuvre s'appliquant par lui-même à l'ensemble de la surface à imprimer, ils concernent d'emblée la totalité de celle-ci.In particular, they are advantageously capable of relatively high workload, such as a compact disc for second, because, the silk screen they implement applying by itself to the entire surface to be printed, they immediately concern the all of it.

Ils conviennent donc tout particulièrement lorsque le nombre d'articles à imprimer en série est relativement important, en étant par exemple supérieur à mille.They are therefore particularly suitable when the number of articles to serial printing is relatively important, for example being greater than thousand.

Les postes d'impression sérigraphique ont cependant pour inconvénient de nécessiter, avant leur mise en route, un réglage en position de leur écran de soie, pour ajuster la position de l'impression assurée par celui-ci par rapport à la surface à imprimer, et, le cas échéant, c'est-à-dire lorsque doit intervenir un changement de couleur, le nettoyage de la raclette et de la contre-raclette associées à cet écran de soie.However, the screen printing stations have the disadvantage to require, before their start, a setting in position of their screen of silk, to adjust the position of the impression provided by it in relation to the surface to be printed and, where appropriate, that is to say when a color change, cleaning the squeegee and counter-squeegee associated with this silk screen.

Le temps de mise en route correspondant peut par exemple atteindre plusieurs minutes.The corresponding start-up time can for example reach several minutes.

Par suite, lorsque, comme cela est le cas fréquent, plusieurs postes d'impression sérigraphique sont à mettre en oeuvre pour l'impression d'un même article, à raison d'un poste d'impression sérigraphique par couleur à appliquer à celui-ci, le temps global d'utilisation de la machine à imprimer devient très largement supérieur à son temps réel d'impression, en étant par exemple trois à quatre fois supérieur à celui-ci, au détriment de la productivité. As a result, when, as is often the case, silk screen printing are to be used for the printing of a same article, at the rate of one silk-screen printing station per apply to it, the overall time of use of the printing machine becomes far greater than its actual print time, by being example three to four times higher than this, to the detriment of productivity.

La présente invention a d'une manière générale pour objet une disposition de nature à permettre de minimiser cet inconvénient.The present invention generally relates to a provision likely to minimize this disadvantage.

De manière plus précise, elle a pour objet une machine à imprimer du genre comportant un convoyeur sans fin, qui porte, de place en place, une pluralité de supports porte-objet, et au moins un poste d'impression sérigraphique disposé à l'aplomb du trajet de ces supports porte-objet, cette machine à imprimer étant d'une manière générale caractérisée en ce qu'elle comporte, également, au moins un poste d'impression numérique, qui fonctionne par jet d'encre, et qui est destiné à intervenir à la demande.More specifically, it relates to a printing machine of the a kind with an endless conveyor, which carries, from place to place, a plurality of object holders, and at least one printing station screenprint placed directly above the path of these object-holders, this printing machine being generally characterized in that also includes at least one digital printing station, which works by inkjet, and which is intended to intervene on demand.

Les postes d'impression numérique fonctionnant par jet d'encre sont bien connus par eux-mêmes, et ils ont pour avantages, d'une part, d'opérer directement, sans faire appel à un quelconque accessoire, tel qu'écran, cliché ou autre, et en permettant donc de faire l'économie d'un tel accessoire, et, d'autre part, de pouvoir assurer, par eux-mêmes, l'impression de plusieurs couleurs, sans nécessiter de réglage spécifique pour chacune de celles-ci.Inkjet-based digital printing stations are well known by themselves, and they have the advantages, on the one hand, of operating directly, without using any accessory, such as screen, snapshot or other, and thus allowing the economy of such an accessory, and, on the other hand, to be able to ensure, by themselves, the impression of several colors, without requiring any specific adjustment for each of them.

Il suffit, en effet, qu'ils comportent autant de buses d'impression qu'il y a de couleurs à imprimer, et que, dûment programmée à cet effet, leur commande assure de manière contrôlée l'intervention de chacune de ces buses d'impression.It suffices to have as many printing nozzles as there are colors to print, and that, duly programmed for this purpose, their control ensures the controlled operation of each of these nozzles printing.

Mais, opérant point par point, et ligne par ligne, les postes d'impression numérique fonctionnant par jet j'encre ont pour inconvénient de n'être susceptibles que de cadences de travail relativement faibles, très inférieures, en tout cas, à celle d'un poste d'impression sérigraphique.But, operating point by point, and line by line, the printing stations jet-operated digital printing I have the disadvantage of not being likely to have relatively low, very low work rates, in any case, to that of a silkscreen printing station.

Cependant, dès que le nombre d'articles à imprimer en série est relativement faible, en étant par exemple inférieur à mille, la productivité d'une machine à imprimer mettant en oeuvre un tel poste d'impression numérique fonctionnant par jet d'encre devient concurrentielle avec celle d'une machine à imprimer mettant en oeuvre un poste d'impression sérigraphique, et il en est ainsi a fortiori si, comme cela est le cas le plus fréquent, plusieurs couleurs sont à imprimer sur un même article. However, as soon as the number of articles to be printed in series is relatively low, being for example less than one thousand, the productivity of a printing machine implementing such a digital printing station Inkjet operation becomes competitive with that of a printing using a screen printing station, and so on even more so if, as is the case most often, several colors are to print on the same article.

En permettant à l'utilisateur de la machine à imprimer suivant l'invention de faire intervenir à son gré, suivant les nécessités du moment, et, plus précisément, suivant le nombre d'articles à imprimer, un poste d'impression numérique fonctionnant par jet d'encre, en le substituant par exemple à un poste d'impression sérigraphique, la disposition suivant l'invention conduit avantageusement au maintien d'une productivité acceptable pour cette machine à imprimer, même lorsque le nombre d'articles à imprimer est relativement faible.By allowing the user of the printing machine according to the invention to intervene at will, according to the necessities of the moment, and, more precisely, depending on the number of articles to be printed, a printing station ink jet, by substituting it for example for a silk screen printing station, the arrangement according to the invention leads to advantageously to the maintenance of an acceptable productivity for this machine to print, even when the number of articles to be printed is relatively weak.

En outre, cette disposition, qui associe un poste d'impression numérique fonctionnant par jet d'encre à un poste d'impression sérigraphique, est d'autant plus avantageuse que, l'impression par jet d'encre nécessitant la présence, sur les objets à imprimer, d'une couche de matière absorbante ou de vernis, cette couche de matière absorbante ou de vernis peut aisément être appliquée à ces objets à un poste d'impression sérigraphique.In addition, this provision, which combines a digital printing station ink jet operation at a screen printing station, is all the more advantageous as, inkjet printing requiring the presence, on the objects to be printed, of a layer of absorbent material or varnish, this layer of absorbent material or varnish can easily be applied to these objects at a screen printing station.

Les caractéristiques et avantages de l'invention ressortiront d'ailleurs de la description qui va suivre, à titre d'exemple, en référence aux dessins schématiques annexés sur lesquels :

  • la figure 1 est une vue en perspective d'une machine à imprimer suivant l'invention ;
  • la figure 2 est, à échelle supérieure, une vue en perspective du poste d'impression numérique fonctionnant par jet d'encre qu'elle comporte ;
  • la figure 3 est une vue partielle de dessus de ce poste numérique, suivant la flèche III de la figure 2, et avec une partie du convoyeur sans fin associé ;
  • les figures 4A, 4B sont des vues en perspective qui, analogues à celle de la figure 1 , illustrent deux phases successives de mise en oeuvre de cette machine à imprimer.
    • The features and advantages of the invention will emerge from the following description, by way of example, with reference to the appended diagrammatic drawings in which:
  • Figure 1 is a perspective view of a printing machine according to the invention;
  • FIG. 2 is, on a larger scale, a perspective view of the digital inkjet printing station that it comprises;
  • Figure 3 is a partial top view of this digital station, along the arrow III of Figure 2, and with a portion of the associated endless conveyor;
  • Figures 4A, 4B are perspective views which, similar to that of Figure 1, illustrate two successive phases of implementation of this printing machine.

    • Tel qu'illustré sur ces figures, la machine à imprimer 10 suivant l'invention comporte, globalement, de manière connue en soi, un convoyeur sans fin 11, qui porte, de place en place, une pluralité de supports porte-objet 13, et au moins un poste d'impression sérigraphique 14 disposé à l'aplomb du trajet de ces supports porte-objet 13.As illustrated in these figures, the next printing machine 10 the invention comprises, generally, in a manner known per se, a conveyor 11, which carries, from place to place, a plurality of object holders 13, and at least one screen printing station 14 disposed vertically above path of these object holders 13.

    Cette machine à imprimer 10 ne relevant pas, par elle-même, de la présente invention, elle ne sera pas décrite dans tous ses détails ici.This printing machine 10 does not, of itself, belong to the present invention, it will not be described in all its details here.

    Il en est ainsi, en particulier, du convoyeur sans fin 11, des supports porte-objet 13, et du poste d'impression sérigraphique 14, et c'est en outre la raison pour laquelle ce convoyeur sans fin 11, ces supports porte-objet 13, et ce poste d'impression sérigraphique 14, n'ont été que schématisés, par leur contour, sur les figures.This is so, in particular, the endless conveyor 11, supports 13, and the silk-screen printing station 14, and this is also the reason why this endless conveyor 11, these object holders 13, and this silkscreen printing station 14 were only schematized by their outline, in the figures.

    S'agissant, par exemple, du convoyeur sans fin 11, il suffira d'indiquer que, dans la forme de réalisation représentée, il est formé, à titre d'exemple, par un plateau de contour circulaire monté rotatif sur un bâti 12, à la manière d'une tourelle, et que les supports porte-objet 13 qu'il porte sont répartis circulairement à un pas régulier autour de l'axe de rotation A de ce plateau.As regards, for example, the endless conveyor 11, it will suffice to indicate that, in the embodiment shown, it is formed, by way of example, by a circular contour plate rotatably mounted on a frame 12, in the manner of a turret, and that the object holders 13 that it carries are distributed circularly at a regular pitch around the axis of rotation A of this plate.

    S'agissant du poste d'impression sérigraphique 14, il suffira, corollairement, de rappeler que, de manière connue en soi, il met en oeuvre un écran de soie formant pochoir, dont certaines des mailles sont libres et d'autres obturées, suivant l'impression à assurer, et que, à cet écran de soie, est associée une raclette, qui, montée mobile à cet effet, est apte, notamment, à forcer de l'encre à passer à travers ses mailles libres.As regards the screen printing station 14, it will suffice, correspondingly, to recall that, in a manner known per se, it implements a silk screen forming stencil, some of the stitches are free and others closed, depending on the impression to be made, and that, on this screen of silk, is associated a squeegee, which, mounted mobile for this purpose, is suitable, in particular, to force ink to pass through his free meshes.

    En pratique, plusieurs postes d'impression sérigraphique 14 sont répartis autour du convoyeur sans fin 11, à raison d'un poste d'impression sérigraphique 14 par couleur à appliquer aux articles à imprimer.In practice, several screen printing stations 14 are distributed around the endless conveyor 11, at the rate of one printing station screen printing 14 per color to be applied to the articles to be printed.

    Par mesure de simplicité, seuls deux postes d'impression sérigraphique 14 ont été schématisés sur les figures.For the sake of simplicity, only two silkscreen printing stations 14 have been schematized in the figures.

    En pratique, également, à chacun des postes d'impression sérigraphique 14 ainsi mis en oeuvre est usuellement associé un poste de séchage, non représenté.In practice, also, at each screen printing station 14 thus implemented is usually associated with a drying station, not represent.

    D'autres postes, également non représentés, peuvent aussi être prévus le long du convoyeur sans fin 11, tels que, par exemple, un poste de chargement et/ou de déchargement, un poste de dépoussiérage, et un poste de flammage.Other positions, also unrepresented, may also be provided along the endless conveyor 11, such as, for example, a loading and / or unloading, a dedusting station, and a post flaming.

    Suivant l'invention, la machine à imprimer 10 comporte, également, au moins un poste d'impression numérique 15, qui fonctionne par jet d'encre, et qui est destiné à intervenir à la demande.According to the invention, the printing machine 10 also comprises the least one digital printing station 15, which operates by inkjet, and which is intended to intervene on demand.

    Par exemple, et cela est le cas dans la forme de réalisation représentée, ce poste d'impression numérique 15 est associé à un poste d'impression sérigraphique 14, et il est apte à être substitué à celui-ci.For example, and this is the case in the embodiment shown, this digital printing station 15 is associated with a printing station screenprint 14, and is suitable for being substituted therefor.

    Dans la forme de réalisation représentée, le poste d'impression sérigraphique 14 auquel est ainsi associé un poste d'impression numérique 15 est escamotable.In the embodiment shown, the printing station screen printing 14 which is thus associated with a digital printing station 15 is retractable.

    Les postes d'impression sérigraphique 14 autres que celui auquel le poste d'impression numérique 15 peut être substitué ne sont pas, eux, nécessairement escamotables.The silk-screen printing stations 14 other than that to which the digital print station 15 can be substituted are not, them, necessarily retractable.

    Mais certains au moins d'entre eux peuvent l'être si désiré.But at least some of them can be so desired.

    Dans la forme de réalisation représentée, le poste d'impression sérigraphique 14 auquel est associé le poste d'impression numérique 15 est monté mobile entre une position de service, qui est relativement proche du convoyeur sans fin 11, et pour laquelle il est apte à intervenir, figure 1, et une position d'attente, qui est relativement éloignée du convoyeur sans fin 11, et pour laquelle il laisse entre celui-ci et lui un espace 16 suffisant pour que le poste d'impression numérique 15 puisse être implanté à sa place, figures 4A et 4B.In the embodiment shown, the printing station screen printing 14 to which is associated the digital printing station 15 is movably mounted between a service position, which is relatively close to the endless conveyor 11, and for which it is able to intervene, FIG. standby position, which is relatively far away from the endless conveyor 11, and for which he leaves between him and him a sufficient space for the digital printing station 15 can be implanted in its place, FIGS. 4A and 4B.

    En pratique, dans la forme de réalisation représentée, le poste d'impression sérigraphique 14 est monté coulissant sur au moins une colonne 18, qui s'étend sensiblement perpendiculairement au convoyeur sans fin 11.In practice, in the embodiment shown, the position screen printing device 14 is slidably mounted on at least one column 18, which extends substantially perpendicular to the endless conveyor 11.

    Par exemple, 'et tel que représenté, deux colonnes 18 sont prévues, parallèlement l'une à l'autre, à distance l'une de l'autre.For example, and as shown, two columns 18 are provided, parallel to each other, at a distance from each other.

    Corollairement, le poste d'impression numérique 15 est globalement monté mobile entre une position d'attente, pour laquelle il est écarté du convoyeur sans fin 11, figures 1 et 4A, et une position de service, pour laquelle, en substitution au poste d'impression sérigraphique 14, il est à l'aplomb du trajet des supports porte-objet 13 portés par ce convoyeur sans fin 11, figure 4B.As a corollary, the digital printing station 15 is globally movable between a waiting position, for which it is removed from the endless conveyor 11, FIGS. 1 and 4A, and a service position, for which, in substitution for the silk-screen printing station 14, is the plumb course of the object-carrying supports 13 carried by this conveyor without end 11, FIG. 4B.

    En pratique, dans la forme de réalisation représentée, le poste d'impression numérique 15 est monté coulissant sur au moins un rail 20, qui s'étend sensiblement parallèlement au convoyeur sans fin 11.In practice, in the embodiment shown, the position digital printing device 15 is slidably mounted on at least one rail 20, which extends substantially parallel to the endless conveyor 11.

    Par exemple, et tel que représenté sur la figure 1, deux rails 20 sont prévus, parallèlement l'un à l'autre, à distance l'un de l'autre.For example, and as shown in FIG. 1, two rails 20 are parallel to each other at a distance from one another.

    Dans la forme de réalisation représentée, le poste d'impression numérique 15 est porté par un bâti 21 indépendant, c'est-à-dire par un bâti 21 distinct du bâti 12 portant le convoyeur sans fin 11 et le poste d'impression sérigraphique 14.In the embodiment shown, the printing station digital 15 is carried by a frame 21 independent, that is to say by a frame 21 separate from the frame 12 carrying the endless conveyor 11 and the printing station screen printing 14.

    Par exemple, et tel que représenté, ce bâti 21 est équipé de roulettes 22, pour son approche du bâti 12, et les rails 20, qui sont portés par ce bâti 21, permettent si nécessaire un ajustement plus fin de la position du poste d'impression numérique 15 par rapport au bâti 12, sensiblement parallèlement au convoyeur sans fin 11.For example, and as shown, this frame 21 is equipped with wheels 22, for its approach of the frame 12, and the rails 20, which are supported by this frame 21, allow if necessary a finer adjustment of the position of the post of digital printing 15 relative to the frame 12, substantially parallel to the endless conveyor 11.

    Dans la forme de réalisation représentée, le poste d'impression numérique 15 est en outre monté réglable en position sensiblement perpendiculairement au convoyeur sans fin 11.In the embodiment shown, the printing station digital device 15 is further mounted adjustable in substantially perpendicular to the endless conveyor 11.

    Plus précisément, dans cette forme de réalisation, il est monté coulissant sur au moins un montant 24, qui s'étend sensiblement perpendiculairement au convoyeur sans fin 11, et qui est porté par un chariot 25 monté mobile sur les rails 20.More specifically, in this embodiment, it is mounted sliding on at least one amount 24, which extends substantially perpendicular to the endless conveyor 11, and which is carried by a carriage 25 mounted movably on the rails 20.

    Par exemple, et tel que représenté sur la figure 1, deux montants 24 sont prévus, parallèlement l'un à l'autre, à distance l'un de l'autre.For example, and as shown in FIG. 1, two amounts 24 are provided, parallel to each other, at a distance from each other.

    Dans la forme de réalisation représentée, le poste d'impression numérique 15 comporte une traverse 27, qui, à la manière d'une table X-Y, est montée mobile suivant deux directions D1, D2 orthogonales, tel que schématisé par des doubles flèches sur la figure 2, et qui porte au moins une tête d'impression 28. In the embodiment shown, the printing station numeral 15 comprises a cross member 27, which, in the manner of an X-Y table, is mounted according to two orthogonal directions D1, D2, such as schematized by double arrows in Figure 2, and which carries at least one print head 28.

    En pratique, l'une des directions D1, D2 de mobilité de cette traverse 27, en l'espèce la direction D1, est sensiblement tangentielle par rapport au plateau formant le convoyeur sans fin 11, et l'autre, et, donc, en l'espèce, la direction D2, est sensiblement radiale par rapport à celui-ci.In practice, one of the directions D1, D2 of mobility of this cross 27, in this case the direction D1, is substantially tangential to the tray forming the endless conveyor 11, and the other, and therefore, in this case, the direction D2, is substantially radial with respect thereto.

    En pratique, la traverse 27 du poste d'impression numérique 15 est montée coulissante sur au moins une coulisse 29 qui appartient à un chariot 30 monté lui-même coulissant sur au moins une coulisse 31 orthogonale à la coulisse 29 précédente.In practice, the cross member 27 of the digital printing station 15 is slidingly mounted on at least one slide 29 which belongs to a carriage 30 itself slidable on at least one slide 31 orthogonal to the previous slide 29.

    Par exemple, et tel que représenté sur la figure 2, deux coulisses 29 sont prévues, parallèlement l'une à l'autre, à distance l'une de l'autre, et, de même, mais en positions croisées par rapport aux coulisses 29, et à distance de celles-ci, deux coulisses 31 sont prévues, parallèlement l'une à l'autre, à distance l'une de l'autre.For example, and as shown in Figure 2, two slides 29 parallel to each other, at a distance from one another, and, same, but in cross-positions with respect to backstage 29, and remotely of these, two slides 31 are provided, parallel to each other, to distance from each other.

    Par exemple, également, le chariot 30 est en quelque sorte suspendu aux coulisses 31, et la traverse 27 porte sur les coulisses 29.For example, also, the carriage 30 is somehow suspended the slides 31, and the crossbar 27 is on the slides 29.

    Préférentiellement, la traverse 27 est en prise, par un écrou 32, avec une vis 33 calée sur l'arbre de sortie d'un moteur 34, et, de même, le chariot 30 est en prise, par un écrou 35, avec une vis 36 calée sur l'arbre de sortie d'un moteur 37.Preferably, the cross member 27 is engaged by a nut 32, with a screw 33 set on the output shaft of a motor 34, and likewise the carriage 30 is engaged by a nut 35 with a screw 36 keyed on the output shaft an engine 37.

    Dans la forme de réalisation représentée, la traverse 27 du poste d'impression numérique 15 s'étend sensiblement tangentiellement par rapport au plateau formant le convoyeur sans fin 11, suivant la direction D1.In the embodiment shown, the cross member 27 of the station of digital printing 15 extends substantially tangentially relative to to the plate forming the endless conveyor 11, in the direction D1.

    Elle s'étend donc sensiblement perpendiculairement par rapport à ce convoyeur sans fin 11.It therefore extends substantially perpendicular to this endless conveyor 11.

    Préférentiellement, cette traverse 27 porte au moins deux têtes d'impression 28, qui sont échelonnées suivant sa longueur, et qui sont décalées transversalement l'une par rapport à l'autre suivant sa largeur, de manière à tenir compte du rayon de la circonférence suivant laquelle s'étendent les supports porte-objet 13.Preferably, this cross 27 carries at least two heads 28, which are staggered along its length, and which are shifted transversely relative to each other along its width, from in order to take into account the radius of the circumference according to which the holders 13 extend.

    Par exemple, et tel que représenté, la traverse 27 porte ainsi, à distance l'une de l'autre, quatre têtes d'impression 28, et celles-ci sont établies suivant un pas qui correspond sensiblement au pas des supports porte-objet 13 sur le convoyeur sans fin 11.For example, and as shown, the crossbar 27 thus carries, remotely of the other, four printheads 28, and these are established next a step which corresponds substantially to the pitch of the object-bearing supports 13 on the endless conveyor 11.

    Dans la forme de réalisation représentée, les têtes d'impression 28 interviennent à la manière de nacelles à la surface inférieure de la traverse 27, et chacune d'elles porte, elle-même, sur sa propre surface inférieure, au moins deux buses d'impression 39.In the embodiment shown, the print heads 28 act as nacelles on the lower surface of the crossbar 27, and each of them bears, itself, on its own lower surface, at least two print nozzles 39.

    En pratique, et tel que représenté, quatre buses d'impression 39, au moins, sont ainsi échelonnées sur chacune des têtes d'impression 28, suivant la longueur de celles-ci, pour répondre aux exigences d'une impression en quadrichromie.In practice, and as shown, four printing nozzles 39, at less, are thus staggered on each of the printheads 28, following the length of these, to meet the requirements of a printing in color.

    Ces buses d'impression 39 sont bien connues par elles-mêmes, notamment sur les imprimantes du commerce, et, ne relevant donc pas, en propre, de la présente invention, elles ne seront pas décrites ici.These printing nozzles 39 are well known per se, in particular on commercial printers, and therefore not falling within of the present invention, they will not be described here.

    Enfin, dans la forme de réalisation représentée, le chariot 30 du poste d'impression numérique 15 comporte, à l'une des extrémités des coulisses 29, un boítier 40, pour le logement d'un dispositif de nettoyage propre à assurer le nettoyage des buses d'impression 39.Finally, in the embodiment shown, the carriage 30 of the station digital printing device 15 comprises, at one of the ends of the slides 29, a housing 40, for housing a clean cleaning device to ensure the cleaning the print nozzles 39.

    Les dispositions correspondantes sont elles aussi bien connues par elles-mêmes, notamment sur les imprimantes du commerce, et, ne relevant pas en propre de la présente invention, elles ne seront pas non plus décrites ici.The corresponding provisions are also well known by themselves, in particular on commercial printers, and not falling under of the present invention, they will not be described here either.

    En fonctionnement normal, le poste d'impression sérigraphique 14 est en position de service, et le poste d'impression numérique 15 est en position d'attente.In normal operation, the screen printing station 14 is in the service position, and the digital printing station 15 is in position Wait.

    Si nécessaire, et tel que schématisé à la figure 4A, le poste d'impression sérigraphique 14 est élevé en position d'attente, et, à sa place, est inséré, sous lui, dans l'espace 16 qu'il laisse libre entre lui et le convoyeur sans fin 11, le poste d'impression numérique 15, tel que représenté à la figure 4B.If necessary, and as shown schematically in Figure 4A, the printing station screenprint 14 is raised to the standby position, and in its place is inserted, under him, in space 16 that he leaves free between him and the endless conveyor 11, the digital printing station 15, as shown in Figure 4B.

    Ainsi qu'on le notera, lorsqu'il est ainsi en service, le poste d'impression numérique 15 prévu suivant l'invention coopère avec au moins deux supports porte-objet 13, et, en l'espèce, avec quatre, à raison d'un support porte-objet 13 par tête d'impression 28, en intervenant simultanément sur les objets à imprimer portés par ces supports porte-objet 13, tandis qu'un poste d'impression sérigraphique 14 ne coopère, lui, qu'avec un seul support porte-objet 13.As will be noted, when so in use, the printing station digital device 15 provided according to the invention cooperates with at least two supports 13 and, in the present case, with four, with the aid of a 13 per print head 28, intervening simultaneously on the objects to print carried by these object holders 13, while a post screen printing 14 only cooperates with a single support article 13

    Il est ainsi avantageusement possible de rapprocher la cadence d'impression par jet d'encre de la cadence d'impression par sérigraphie.It is thus advantageously possible to approximate the rate inkjet printing rate of printing by screen printing.

    Ainsi qu'on le notera, également, lorsque le poste d'impression numérique 15 est en service, il intervient, simultanément, avec au moins un autre poste d'impression sérigraphique 14, si, comme envisagé ci-dessus, la machine à imprimer 10 comporte un ou plusieurs postes d'impression sérigraphique 14 en sus de celui auquel est associé ce poste d'impression numérique 15.As will be noted, also, when the printing station digital 15 is in use, it intervenes, simultaneously, with at least one another screen printing station 14, if, as envisaged above, the printing machine 10 has one or more printing stations screenprint 14 in addition to the one with which this printing station is associated digital 15.

    Or, comme déjà souligné précédemment, la cadence de travail de ces postes d'impression sérigraphique 14 est supérieure à celle du poste d'impression numérique 15, ce qui, normalement, les conduit, à chaque avance d'un pas du convoyeur sans fin 11, à s'arrêter avant le poste d'impression numérique 15.As already pointed out above, the pace of work of these silk screen printing stations 14 is superior to that of the post of digital printing 15, which normally drives them at each advancing one step of the endless conveyor 11, to stop before the position digital printing 15.

    Suivant un développement de l'invention, des moyens de modulation sont prévus pour permettre, ainsi, effectivement, au poste d'impression numérique 15 d'intervenir, au moins momentanément, simultanément avec au moins un autre poste d'impression sérigraphique 14.According to a development of the invention, modulation means are intended to allow, thus, effectively, to the printing station to intervene, at least momentarily, simultaneously with less another silk screen printing station 14.

    Par exemple, ces moyens de modulation résultent, notamment, de ce que les moyens de commande du ou des postes d'impression sérigraphique 14 sont découplés des moyens de commande du convoyeur sans fin 11.For example, these modulation means result, in particular, from this that the control means of the screen printing station (s) 14 are decoupled from the control means of the endless conveyor 11.

    En variante, ou en complément, ces moyens de modulation résultent, notamment, de ce que les moyens de commande du ou des postes d'impression sérigraphique 14 et les moyens de commande du poste d'impression numérique 15 sont distincts.As a variant, or in addition, these modulation means result, in particular, that the control means of the or posts screen printing device 14 and the control means of the station 15 digital printing are distinct.

    Corollairement, suivant un autre développement de l'invention, les moyens de commande du convoyeur sans fin 11 sont préférentiellement à vitesse variable, pour permettre une impression en sérigraphie à cadence normale lorsque cela est possible, et une impression par jet d'encre à cadence plus lente lorsque cela est nécessaire.As a corollary, according to another development of the invention, the control means of the endless conveyor 11 are preferably variable speed, to allow printing in serigraphy at a rate normal when possible, and an inkjet print at a rate slower when necessary.

    Les modalités de réalisation de tels moyens de modulation relevant de l'homme de l'art, elles ne seront pas décrites ici.The arrangements for producing such means of modulation falling within the man of the art, they will not be described here.

    D'une manière plus générale, et ainsi qu'on l'aura compris, la machine à imprimer suivant l'invention est susceptible de relever de modalités d'exécution très diverses.More generally, and as will be understood, the machine to print according to the invention may be subject to implementing rules very diverse.

    Cela est d'ailleurs la raison pour laquelle le mode de réalisation plus particulièrement évoqué n'a pas été décrit dans tous ses détails ici, ceux-ci relevant simplement de l'homme de l'art.This is also why the embodiment more particularly evoked has not been described in all its details here, these simply falling within the skill of the art.

    La présente invention ne se limite de toute façon pas à ce mode de réalisation, mais s'étend au contraire à toute variante d'exécution.The present invention is not limited anyway to this mode of realization, but on the contrary extends to any variant of execution.

    En particulier, il peut être associé, au poste d'impression numérique fonctionnant par jet d'encre, un ou plusieurs autres postes, tels que, par exemple, au moins un poste de vernissage, par exemple un poste d'impression sérigraphique, et au moins un poste de séchage.In particular, it can be associated with the digital printing station ink jet, one or more other items, such as, for example, for example, at least one varnishing station, for example a printing station silkscreen, and at least one drying station.

    En outre, la configuration du convoyeur sans fin mis en oeuvre est indifférente.In addition, the configuration of the endless conveyor implemented is indifferent.

    Par exemple il pourrait tout aussi bien s'agir d'un convoyeur sans fin linéaire.For example it could just as well be an endless conveyor linear.

    Claims (17)

    1. A printing machine including an endless conveyor (11) carrying a plurality of spaced object supports (13), at least one screenprinting station (14) vertically aligned with the path of movement of said object supports (13) and at least one digital inkjet printing station (15) adapted to be operated on demand, modulating means being provided to enable the digital printing station (15) to operate, at least momentarily, at the same time as at least one other screenprinting station (14) and the means actuating the endless conveyor (11) operate at variable speed.
    2. A printing machine according to claim 1 characterized in that the modulation is achieved by virtue of the fact that the means actuating the screenprinting station(s) (14) are decoupled from the means driving the endless conveyor (11).
    3. A printing machine according to claim 1 characterized in that the modulation is achieved by virtue of the fact that the means actuating the screenprinting station(s) are separate from the means driving the digital printing station (15).
    4. A printing machine according to any of claims 1 to 3 characterized in that the digital printing station (15) is associated with a screenprinting station (14) and adapted to be substituted for it.
    5. A printing machine according to claim 4 characterized in that the screenprinting station (14) associated with the digital printing station (15) is mobile between an in-service position which is relatively close to the endless conveyor (11) and in which it is adapted to operate and a standby position which is relatively far away from the endless conveyor (11) and in which there is a sufficient gap (16) between it and the conveyor for the digital printing station (15) to be substituted for it.
    6. A printing machine according to claim 5 characterized in that the screenprinting station (14) slides on at least one column (18) substantially perpendicular to the endless conveyor (11).
    7. A printing machine according to any of claims 4 to 6 characterized in that the printing station (15) is mobile between a standby position in which it is moved away from the endless conveyor (11) and an in-service position in which it is substituted for the screenprinting station (14) and vertically aligned with the path of movement of the object supports (13) carried by said endless conveyor (11).
    8. A printing machine according to claim 7 characterized in that the digital printing station (15) slides on at least one rail (20) substantially parallel to the endless conveyor (11).
    9. A printing machine according to claim 8 characterized in that the position of the digital printing station (15) is adjustable substantially perpendicularly to the endless conveyor (11).
    10. A printing machine according to any of claims 4 to 9 characterized in that the digital printing station (15) is carried by an independent frame (21).
    11. A printing machine according to any of claims 4 to 10 characterized in that the digital printing station (15) includes a crossmember (27) mobile in two orthogonal directions (D1, D2) in the manner of an X-Y table and carrying at least one printhead (28).
    12. A printing machine according to claim 11 characterized in that the crossmember (27) is substantially perpendicular to the endless conveyor (11) and carries at least two printheads (28) staggered in the direction of its length and offset transversely relative to each other in the direction of its width.
    13. A printing machine according to any of claims 1 to 12 characterized in that the digital printing station (15) cooperates with at least two object supports (13) and a screenprinting station (14) cooperates with only one object support (13).
    14. A printing machine according to claim 11 in conjunction with claim 12 or claim 13 characterized in that the endless conveyor (11) is in the form of a rotary circular contour plate and one of the directions (D1, D2) in which the crossmember (27) of the digital printing station (15) can move is a direction substantially tangential to said plate.
    15. A printing machine according to any of claims 11 to 14 characterized in that the crossmember (27) of the digital printing station (15) slides on at least one slideway (29) which is part of a carriage (30) which slides on at least one slideway (31) orthogonal to the first-mentioned slideways(s) (29).
    16. A printing machine according to any of claims 11 to 15 characterized in that each printhead (28) carried by the crossmember (27) of the digital printing station (15) carries at least four printing nozzles (39).
    17. A printing machine according to claim 12 in conjunction with claim 14 characterized in that the printheads (28) are offset transversely relative to each other in the direction of the width of the crossmember (27) to allow for the radius of the circumference on which the object supports (13) are disposed.
    EP99402503A 1998-10-22 1999-10-12 Printing machine, incorporating at least one screen printing station and at least one digital ink jet printing station Expired - Lifetime EP0997275B1 (en)

    Applications Claiming Priority (2)

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    FR9813244 1998-10-22
    FR9813244A FR2784933B1 (en) 1998-10-22 1998-10-22 PRINTING MACHINE COMPRISING AT LEAST ONE SERIGRAPHIC PRINTING STATION AND AT LEAST ONE DIGITAL INK-JET PRINTING STATION

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    EP0997275A1 EP0997275A1 (en) 2000-05-03
    EP0997275B1 true EP0997275B1 (en) 2004-01-02

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    EP (1) EP0997275B1 (en)
    JP (1) JP2000127344A (en)
    BR (1) BR9907530A (en)
    DE (1) DE69913916T2 (en)
    ES (1) ES2212496T3 (en)
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    JP3542859B2 (en) * 1995-10-05 2004-07-14 理想科学工業株式会社 Double printing device
    US5873315A (en) * 1998-05-01 1999-02-23 L&P Property Management Company Combination printing and quilting method and apparatus

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    TW571938U (en) 2004-01-11
    DE69913916T2 (en) 2004-10-28
    DE69913916D1 (en) 2004-02-05
    US6397740B1 (en) 2002-06-04
    FR2784933B1 (en) 2001-01-05
    JP2000127344A (en) 2000-05-09
    ES2212496T3 (en) 2004-07-16
    EP0997275A1 (en) 2000-05-03
    BR9907530A (en) 2000-08-15
    FR2784933A1 (en) 2000-04-28

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