EP0132857A1 - Combined rotary sheet printing press - Google Patents

Abstract

A printing machine comprising an indirect printing device, a drying device, a sheet transfer and turning device actuated according to requirements, and an intaglio printing machine. It permits printing in a single pass through the device a simultaneous recto-verso printing, namely on one side according to the color collecting printing method, an image with juxtaposed colors, and on the other side according to the offset printing method an image with superposed colors and designs, notably for creating safety background on bank notes, and after drying and, if necessary, turning the sheets, an image printed by intaglio printing on one of the sides, notably for creating a main design on the bank note. The multicolor printing on the side receiving the image with juxtaposed colors may be completed in the device by a monochrome wet offset printing. Moreover, a register control device is incorporated between the sheet transfer and turning device and the intaglio printing machine.

Description

The invention relates to a rotary printing machine combined with a sheet or a reel, in particular for printing securities, comprising an indirect printing device in several colors, an intaglio machine comprising a cylinder plate inked in several colors and cooperating with a wiping device and a printing cylinder, and a paper transport system bringing the printed paper into the indirect printing device with the intaglio machine.

Such a combined machine is known from Swiss Patent CH-A-566,210 and comprises as an indirect printing device a multicolored offset printing machine for printing one side of the paper, which is then transferred to the intaglio machine for printing. multicolored direct on the same side of the paper. This machine is preferably intended, within the framework of the production of banknotes, to print in a single pass first on one side of the paper a security background in offset printing then, on the same side, a main drawing in intaglio printing, to finish printing the banknotes it is necessary to use a second machine which prints the other side.

The offset or indirect letterpress printing process produces a color printing and overlapping designs which is often used to print security funds. According to this method, the complete drawing is composed of partial drawings of different colors carried by offset printing plates mounted on plate cylinders so as to allow the superimposition of drawings and colors in register with each other on a cylinder blankets against which the paper to be printed is pressed. The number of printing plates and, consequently, of plate cylinders corresponds to the number of different colors and designs composing the multicolored image.

There are also offset machines of this type for simultaneous duplex printing in which the paper passes between two blanket cylinders, each receiving a multicolored image of the corresponding plate cylinders.

We also know from the published German patent application (DE-A-3,109,964) a printing machine ensuring on one side of the paper the printing of an image in juxtaposed colors. This image is printed by means of a single typographic printing plate representing the complete drawing to be printed and mounted on a plate cylinder. This typographic plate is inked by a collector cylinder formed by a blanket cylinder which is in turn inked by a plurality of color selector cylinders, the number of which corresponds to the number of colors in the image to be printed. Each selector cylinder has areas cut in relief representing the parts of the image to be colored in a determined color which its own inking device has transferred to it. This process, which is commonly called "Orlof" or collector color printing, produces a multicolored image ensuring perfect registration between the different colors of the image designs, a result that is impossible to obtain with any other printing process. Since the color selector cylinders are in contact with an elastic surface of the collecting cylinder, they can be made of hard material which makes it possible to cut out very fine raised areas, therefore very fine colored parts, for example in the form of lines or dots. This machine is also intended for printing the security background of banknotes.

At the stage of the current technique, machines have each been developed which separately use one or the other of the offset or "Orlof" methods described above.

The aim of this invention is to create a combined machine which allows the exploitation of three entirely different printing processes, namely offset printing, "Orlof" printing and intaglio printing and this in a single pass of paper, preferably for printing fiduciary papers, especially banknotes to apply at the same time multicolored backgrounds on both sides and at least one main design on one side in soft taalle printing. In this way, the invention has the effect of creating banknotes which are very difficult to counterfeit. In addition, this machine should allow. without difficulty, to introduce several variants of the printing combinations.

To achieve this goal, the machine is characterized by the characteristic clause of claim 1.

The advantage of this machine is that it allows, on the one hand, to operate two completely different processes for simultaneous two-sided printing offset- "Orlof", by which the two sides of banknotes and others security papers can receive multicolored security funds in printing of different types, and on the other hand, to complete a chosen side with an intaglio printing representing the main design for the security papers. This increases security against forgery and also makes printing operations more economical because printing tickets can be completed in this way in a single pass. In addition, this machine offers the user the possibility of variants of printing combinations which are very interesting, sophisticated and hitherto unworkable.

Advantageous embodiments of the invention are described in the dependent claims.

• Les figures 1a et 1b montrent une machine d'impression à la feuille selon l'invention, la moitié droite avec le dispositif d'impression indirecte étant sur la figure 1a, l'autre moitié avec les dispositifs de séchage et de renversement des feuilles ainsi que la machine taille-douce étant sur la figure 1b.
• La figure 2 représente schématiquement, en vue partielle, une extension du dispositif d'impression indirecte selon la figure 1a, complétée par une autre unité d'impression offset humide.
• La figure 3 représente, en vue partielle, un dispositif de contrôle et de correction du registre incorporé dans le système transporteur de la machine entre le dispositif de renversement des feuilles et la machine taille-douce.
• La figure 4 montre, en vue partielle, une autre version de la machine taille-douce.

The invention will be described by way of non-limiting example by one embodiment and several variants with reference to the accompanying drawings.

• FIGS. 1a and 1b show a sheet printing machine according to the invention, the right half with the indirect printing device being in FIG. 1a, the other half with the devices for drying and reversing the sheets as well that the intaglio machine being on figure 1b.
• FIG. 2 schematically represents, in partial view, an extension of the indirect printing device according to FIG. 1a, supplemented by another wet offset printing unit.
• FIG. 3 represents, in partial view, a device for controlling and correcting the register incorporated in the conveyor system of the machine between the device for reversing the sheets and the intaglio machine.
• Figure 4 shows, in partial view, another version of the intaglio machine.

According to FIGS. 1a and 1b, the machine comprises an indirect printing device A for simultaneously applying an offset printing on one side of a sheet 1 (this is the right side in the representation according to FIG. 1a) and a printing " Orlof "on the other side of this sheet which comes from a known non-stop sheet feeder, along trajectory 2. Then. the sheets are brought by a conveyor system. via a drying device B (f-ig.1b) and a device for transferring and reversing the sheets C (fig.1b) at an intaglio machine D (fig. 1b), from which the printed sheets are transported by a system of chain pliers 38 on output stacks, these sheets receiving air on the freshly printed side by means of nozzles blowers 39.

We have schematically designated the drive motor 46 for the indirect printing device A, the drive motor 47 for the intaglio machine D and the drive shaft with a known coupling 48 (fig.1b) intended to balance the rotational moments of the two machines and to separate them in the event of maintenance.

The indirect printing device A (fig.1a) comprises an input device for the sheets coming along the path 2. provided with a margin cylinder 3, a transfer cylinder 5 provided with clamps, and devices dedusting and static electricity removal 4 installed on both sides of the sheets 1. The sheets are transferred to a blanket cylinder 19 provided with the clamps and pressurized against another blanket cylinder 12 of the same diameter . The sheets pass between these blanket cylinders 12 and 19 and are printed simultaneously on both sides. The cylinders rotate in the direction indicated by the arrows. After being printed, the sheets are transported by a chain clamp system 21 to the other devices as described later.

The blanket cylinder 12 cooperates with five offset plate cylinders, four of these offset plate cylinders 8 are equipped, in the example considered, each of a dry offset printing plate each inked by an inking device 7 with double inkwell: the fifth offset plate cylinder 11 carries a wet offset printing plate inked by an inking device 9 with a simple inkwell provided with a wetting device 10. All of these elements 7 to 11 are installed on a mobile offset inking carriage 6.

Dry offset printing plates are typographic plates known per se and the wet offset printing plate is a hollow plate also known per se. These five offset plates represent partial drawings which are inked in different colors and the number of which corresponds to the number of colors and drawings of the first image to be printed on one side of the sheets 1.

This image is in particular a security background in the case of fiduciary papers, in particular banknotes.

These partial drawings of different colors are brought together on the blanket cylinder 12 functioning as an offset blanket cylinder, therefore as a collecting cylinder for the partial drawings composing the multicolored image. This image is transferred to one of the sides of the sheets, where a dry offset printing in four colors is obtained, supplemented by a monochrome wet offset printing.

In the case of fiduciary papers one can also use the four dry offset plate cylinders 8 to create a background in four colors, while the cylinder carries a wet offset plate 11 represents a main design or a part of it.

Of course for offset printing all the plate cylinders mounted on the movable carriage 6, therefore in the example considered all the five plate cylinders can also be fitted with dry offset plates.

On the other side of device A are the elements to produce an "Orlof" image. These elements include a blanket cylinder 16, which has the same diameter as the blanket cylinders 12 and 19. This blanket cylinder 16 cooperates in the example illustrated with four color selector cylinders 15 having reliefs cut according to the contour of the areas to be printed in the respective color, they are inked in said color, each by means of an inking device 14 with double inkwell. These elements 14, 15 are installed on a movable inking carriage "Orlof" 13 (whose withdrawn position 13 'is shown in phantom). These selector cylinders 15 are preferably made of hard material which does not risk being deformed even if the relief is very fine, thus making it possible to obtain a safety background composed of very fine color zones.

The areas of the four colors are transferred to the blanket cylinder 16 which functions as a color collecting cylinder on which they are joined and by which they are transferred to a plate cylinder 17 carrying a plate printing press in contact with said collecting cylinder 16 and with the blanket cylinder 19. This printing plate represents the complete drawing of the second image to be printed in four colors on the other side of the sheets. The complete image inked in the different colors is in turn transferred to the blanket cylinder 19 to apply the impression of the complete image, in particular a security background, on the other side of the sheets, therefore on the side left according to FIG. 1a, while the right side simultaneously receives the offset image. During the simultaneous printing the two cylinders 12 and 19 serve mutually as back-pressure cylinders.

The device A further comprises two image transmission cylinders 18 which transfer the same image of the colored areas of the blanket cylinder 16 in perfect register to the typographic plate cylinder 17, thus making it possible to strengthen the inking of the typographic plate in the desired colors and therefore better cover these areas with the desired ink. Indeed, given the direction of rotation of the blanket cylinder 16, part of the ink is transferred by the cylinders 18 to the typographic plate cylinder 17 while the rest of the ink is transferred in perfect register directly to this cylinder 17. The arrangement of the cylinders concerned for obtaining this double inking is known (DE-A 3.109.964), the second inking being offset by the length of the periphery of the typographic plate cylinder 1 "7 or, in the example considered, of a third of the periphery of the blanket cylinder 16 because this key has a diameter three times larger than the diameter of cylinder 17 and carries three blankets.

In order for this register condition to be fulfilled, the arrangement of the cylinders 16, 17 and 18 is such that the sum of the arc lengths on the peripheries of the cylinders 18 and 17 between the respective contact points - seen in the direction of rotation of these cylinders - must be equal to the length of the arc on the periphery of the cylinder 16 between the points of contact of the latter with the first cylinder 18 and the cylinder 17 plus 1/3 of the periphery of this cylinder 16.

If the design carried on the typographic plate for the "Orlof" printing is composed only of lines, therefore of very narrow inked zones, one can give up the image transmission cylinders 18 and limit oneself to a simple inking of the type plate "Orlof".

In the example illustrated the ratio of the diameters of the cylinders 8, 11, 15, 17 and 18, on the one hand, and of the cylinders 12, 16, 19 on the other hand is 1: 3; the periphery of the cylinders 12, 16 and 19 therefore corresponding to three sheets of paper, these cylinders each carry three blankets.

In the example according to FIG. 2 the printing according to the "Orlof" process is supplemented by a wet offset printing also carried out when the sheets pass between the blanket cylinders 12 and 19, and which is used in particular to print a main drawing monochrome to value papler. The wet offset unit comprises a hollow plate cylinder 43 provided with an inking device 44 and a wetting device 45, known per se, this hollow plate cylinder 43 cooperating with the cylinder blankets 19 which transfers the image to the sheets. So in this case we obtain in a single pass, on the left side in the representation according to Figure 2, a combined print, for example a security background in four colors by a print according to the "Orlof" process and a main drawing monochrome by wet offset printing.

The sheets thus printed leaving the indirect printing device A are delivered by a transfer cylinder 20 to a chain clamp system 21 which belongs to the conveyor system bringing the sheets, keeping the register, to the intaglio machine D via devices B and C.

The drying device B comprises, on the one hand, the last section of the chain clamp system 21, straight and vertically oriented along which there are ultraviolet lamps 22 intended for drying the side of the sheets printed by offset printing and, on the other hand, a drying and transfer cylinder 23 on a part of the periphery of which are provided ultraviolet lamps 24 intended to dry the side of the sheets printed with the "Orlof" printing.

Then the sheets pass through a transfer cylinder 25 to the transfer device and leaf reversal C, known per se. composed of a large cylinder 26 and a small cylinder 26a. This device can be adjusted as required. In the case where the sheets are not to be turned over, they are normally taken up on the cylinder 26 by the clamps of the cylinder 26a which grip their front edge. In this case, intaglio printing is done on the offset printing side. In the case where the sheets must be turned over, therefore if they are to be intaglio printed on the "Orlof" printing side, the cylinder 26a and its clamps are controlled in such a way that it is now the rear edge d '' a sheet which is gripped by the clamps of the cylinder 26a when the sheet has completely passed the point of contact between the two cylinders 26,26a and while it is still on the cylinder 26 whose clamps hold its front edge . For this purpose, the clamps of the cylinder 26a are pivotally mounted around an axis parallel to the axis of the cylinder and the position of which can be controlled. When the rear edge of a sheet is gripped by these clips, these are directed forward, and during the following rotation they are rotated in the rear position so that the edge of the sheet which was the edge rear on the cylinder 26 becomes the front edge and, when the sheet occupies the intermediate position illustrated in dotted lines in Figure 1b, the clamps of the cylinder 26 release the edge of the sheet in such a way that while the cylinder 26a continues to rotate they are taken up completely by this cylinder.

Then, the sheets returned or not, are brought via a transfer cylinder 27 to the printing cylinder 37 of the intaglio machine D. If necessary, a device for ejecting steam 28 can be provided for ejecting steam on the side of the sheets to be printed.

The intaglio machine D shown comprises a plate cylinder 36, which cooperates, in known manner, with the printing cylinder 37. The direction of rotation of the different cylinders is represented by arrows in the drawing. The plate cylinder 36 carries three engraved plates on the surface of which is engraved for example the main drawing of the paper to be printed, formed by two groups of sizes, one having sizes of variable dimensions and relatively deep, the other group having very fine sizes, especially constituted by very fine lines or even points, these sizes being less deep than those of the first group.

At the periphery of this plate cylinder 36 are mounted, on a movable inking carriage 29 and considered in the direction of rotation, a collecting cylinder 32 with smooth surface, which transfers the color zones of the image to the sizes fine of the first group, the complete operation of this collecting cylinder and its other characteristics will be described later. Following the collecting cylinder 32, always considered in the direction of rotation, there is on the same carriage 29 a conventional selection ink roller 40, with elastic surface and provided with an inking device 33 in one color, and intended to ink the deep sizes of the second group; this ink roller 40 is sectioned so as to present raised areas whose contours correspond exactly to those of the surfaces to be inked.

The ink roller 40 is followed by a pre-wiping and ink recovery device 34, then by a wiping device 35, both known per se, which clean the planium from the intaglio plate and compress ink in sizes.

The collecting cylinder 32 has, as already mentioned, a smooth surface and is made up or coated with rubber, for example blankets, or any other elastic material. On this collecting cylinder 32 are transferred three different colors for three different color zones of the image, this is why it cooperates with as many color picking cylinders 31 as there are different colors. The surface of these selector cylinders 31 is made of hard material, for example hard rubber, plastic or metal, each selector cylinder 31 being sectioned so as to present raised areas whose contours correspond exactly to those of the surfaces to be printed. in the respective color. These raised areas are obtained by any known means, for example chemical bite, laser cutting, etc. As the surface of the selector cylinders is hard, there is no limit as regards the fineness of the inking zones that one wants to obtain. It is even possible to produce inking zones having not only very fine lines, but also points, which was impracticable until now.

Each selector cylinder 31 is associated with a inking device 30 comprising the inkwell proper and the pick-up rollers and the color distributor.

In the embodiment shown in the figure, the ratio between the diameters of the selection ink roller 40, respectively of the selector cylinders 31, of the collecting cylinder 32 and of the plate cylinder 36 is 1: 2: 3 and in this case , three plates are regularly distributed on the plate cylinder 36.

Since the sizes which are inked by the collecting cylinder 32 are not deep, the pressure which must be applied to them by the collecting cylinder 32 must be lower than that applied by the conventional inking roller 40 to the deeper sizes. this is why although the surface of the collecting cylinder 32 is a little elastic, there is no deformation of the smooth surface, so that the design can be transferred in perfect register. Likewise, between the selector cylinders 31 and the collecting cylinder 32, a low pressure is needed, which is reduced practically to a simple contact, which avoids deformation of the very fine zones cut out on the selector cylinders 31.

The main advantage of this intaglio machine D is that it ensures a perfect register between the cuts of the different color zones obtained on the selector cylinders 31 of hard material, and that these cylinders are in perfect register with the intaglio printing plate. Furthermore, given the hard material of the selector cylinder 31, there is no limit in the fineness of the elements of the drawing. In addition, the collecting cylinder allows slight superpositions of colors in register absolutely impeccable. Banknotes or other securities are thus obtained having an intaglio printed main design by means of a configuration and a combination of very sophisticated sizes due to the extremely fine sizes which can be provided by collector inking.

On the other hand. it is quite possible that the first group of very fine sizes which are inked via the collector inking may constitute another intaglio security background which complements and / or superimposes the already printed background either in offset or in "Orlof". In this case, it is only by the ink roller 40 that a main intaglio drawing will be applied.

Due to the delicacy of the design of the security background or the main design produced by the inking collector, it is possible to obtain banknotes or any other fiduciary print very difficult to counterfeit.

FIG. 3 shows an extension of the machine described by a device for checking and correcting the register E, a device incorporated between the device for transferring and reversing sheets C and the intaglio machine D. This device E comprises a head for reading of the register 41 arranged opposite the sheets which pass over the first of the transfer cylinders 27 after having left the cylinder 26a of the device C. and a register cylinder 42 disposed between the second transfer cylinder 27 and the printing cylinder 37 of the intaglio machine D. The read head 41 reads the register, respectively a register mark, and if a deviation is detected the register cylinder 42 is controlled by means of an electronic circuit in operation reading the read head 41 in such a way that a small rotation in one or the other direction will be temporarily superimposed on the uniform rotation transfer speed of the cylinder 42. Of course, this register control device is only an option and is not necessarily required.

The mobile inking cart 29 of the intaglio machine D can be replaced by a mobile inking cart 29a (fig. 4) comprising four ink rollers 40a each provided with an inking device 33a and intended to ink directly in an conventional manner the intaglio plates whose sizes are in this case adapted to this direct inking. In this variant, there is only the wiping device 35 without it being necessary to provide a pre-wiping device.

• Sans retournement des feuilles : Côté recto
  • - fond par l'impression offset en cinq couleurs, avec la possibilité d'imprimer en offset sec et/ou offset humide ;
  • - dessin principal par l'impression taille-douce en quatre couleurs, avec la possibilité d'encrage direct et/ou collecteur, ou
  • - variante un autre fond en trois couleurs par l'impression taille-douce avec l'encrage collecteur et un dessin monochrome par l'impression taille-douce avec l'encrage direct.
• Côté verso
  • - fond par l'impression "Orlof" en quatre couleurs, avec la possibilité d'une impression supplémentaire offset humide qui peut soit compléter le fond par une cinquième couleur, soit créer un dessin principal monuchrome.

The combined machine therefore makes it possible to print fiduciary papers, in particular banknotes, in a single pass with the following main combinations:

• Without turning the sheets: Front side
  • - background by offset printing in five colors, with the possibility of printing in dry offset and / or wet offset;
  • - main drawing by printing intaglio in four colors, with the possibility of direct inking and / or collector, or
  • - variant another background in three colors by intaglio printing with collector inking and a monochrome drawing by intaglio printing with direct inking.
• Back side
  • - background by "Orlof" printing in four colors, with the possibility of an additional wet offset printing which can either supplement the background with a fifth color, or create a main monuchrome design.

• Côté recto
  • - fond par l'impression "Orlof" en quatre couleurs, avec la possibilité d'une impression supplémentaire offset humide,
  • - dessin principal par impression taille-douce (comme mentionné ci-dessus avec la variante mentionnée).
• Côté verso
  • - fond par l'impression offset en cinq couleurs, avec la possibilité d'imprimer en offset sec et/ou offset humide, ou
  • - variante : fond par l'impression offset en quatre couleurs, dessin principal monochrome en impression offset humide.

With leaf turning:

• Front side
  • - background by "Orlof" printing in four colors, with the possibility of additional wet offset printing,
  • - main drawing by intaglio printing (as mentioned above with the variant mentioned).
• Back side
  • - background by offset printing in five colors, with the possibility of printing in dry offset and / or wet offset, or
  • - variant: background by offset printing in four colors, main monochrome drawing in wet offset printing.

In addition, for high-value banknotes, one can foresee that the intaglio printing by the intaglio machine D creates the main multicolored design on the back side and that the sheets then pass through a second pass in another machine. Intaglio print which prints a multicolored main design on the front side to obtain in this way main designs printed in intaglio on both sides.

With regard to the drying device B, it is possible to dispense with, if necessary, drying on the side which receives the intaglio printing, if a special ink is used for this side in the indirect printing device A.

The machine described can also be used as a reel printing machine by replacing the means of transporting sheets by means of transporting a strip of paper and adapting the devices C and E to a strip of paper. These devices are known. The tape reversing devices rotate the tape around a longitudinal axis by inverting the side edges. The register control devices for paper webs work with tension rollers and correct the register by changing the web tension.

Claims (7)

1. Rotary combined printing machine, in particular for printing securities, comprising an indirect printing device in several colors, an intaglio machine comprising a plate cylinder inked in several colors and cooperating with a printing device wiping and a printing cylinder, and a paper transport system bringing the printed paper into the indirect printing device with the intaglio machine, characterized in that - the indirect printing device (A) is a simultaneous two-sided printing machine comprising a first blanket cylinder (12) in contact with several offset plate cylinders (8,11) each inked by a device 'inking (7,9) in a different color and the number of which corresponds to the number of colors and designs of the first image to be printed on one of the sides of the paper (1). this first image being a color image and superimposed drawings, and comprising a second blanket cylinder (16) functioning as a color collecting cylinder in contact with several color selector cylinders (15) and with a typographic plate cylinder (17 ) representing the complete drawing of the second image to be printed on the other side of the paper (1). said selector cylinders (15). whose number corresponds to the number of colors in the second image and whose raised areas correspond to the parts of this image to be colored in the various colors are each inked by an inking device (14) in a different color and apply a color image juxtaposed on said collecting cylinder, the latter in turn inking said typographic plate cylinder (17). a third blanket cylinder (19) in contact with said typographic plate cylinder (17) and receiving from it the juxtaposed color image is under pressure with said first blanket cylinder (12), the paper (1) passing between the first and third blanket cylinders (12,19) to be printed simultaneously on one and the other side with the first, respectively the second image; - a drying device (B) is incorporated in the conveyor system, and - a transfer and reversing device (C) of the paper is incorporated in the conveyor system between the drying device (B) and the intaglio machine (D) to turn the paper (1) as needed depending on the side paper printed with a color image and overlapping designs or the side printed with a color image juxtaposed must receive an image printed in the intaglio machine (D). 2. Machine according to claim 1, characterized in that a register control and correction device (E) is incorporated in the conveyor system between the paper transfer and inversion device (C) and the intaglio machine (D). 3. Machine according to claim 2, characterized in that in the event of an n, printing machine for printing the register control and correction device (E) comprises a register reading head (41) and a register cylinder (42) over which the sheets pass downstream of this head and which is controlled by the latter to possibly correct the register. 4. Machine according to one of claims 1 to 3, characterized in that the intaglio machine (D) is equipped with a mobile inking carriage (29) comprising a multi-color inking collector system (30 , 31, 32) and at least one ink roller (40) provided with its inking device (33) for the direct inking of the intaglio plate cylinder (36), said collecting inking system comprising a cylinder collector (32) in contact with said plate cylinder (36) and in turn inked by several color selector cylinders (31) each provided with their own inking device (30), said movable carriage (29) is replaceable by a mobile carriage (29a) provided only with several ink rollers (40a) for direct inking with several colors. 5. Machine according to one of claims 1 to 4, characterized in that at least one (11) of said offset plate cylinders of the indirect printing device (A) carries a wet offset printing plate at which is associated with a wetting device (10), while the other offset plate cylinders (8) carry dry offset printing plates. 6. Machine according to one of claims 1 to 5, characterized in that the indirect printing device (A) further comprises an offset printing unit, preferably wet offset (43,44,45), the plate cylinder (43) is in contact with the third blanket cylinder (19). 7. Machine according to one of claims 1 to 6, characterized in that in the indirect printing device (A) a double inking is provided for the typographic plate cylinder (17) by means of two transmission cylinders of the image (18).

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