EP0794056B1 - Verfahren und Druckvorrichtung zur Durchführung des Verfahrens und dadurch gedruckte Druckträger - Google Patents

Verfahren und Druckvorrichtung zur Durchführung des Verfahrens und dadurch gedruckte Druckträger Download PDF

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Publication number
EP0794056B1
EP0794056B1 EP97400521A EP97400521A EP0794056B1 EP 0794056 B1 EP0794056 B1 EP 0794056B1 EP 97400521 A EP97400521 A EP 97400521A EP 97400521 A EP97400521 A EP 97400521A EP 0794056 B1 EP0794056 B1 EP 0794056B1
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EP
European Patent Office
Prior art keywords
ink
elementary
basic
printing
carrier
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EP97400521A
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English (en)
French (fr)
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EP0794056A1 (de
Inventor
Luc Choulet
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LOreal SA
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LOreal SA
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Priority claimed from FR9602948A external-priority patent/FR2745749B1/fr
Application filed by LOreal SA filed Critical LOreal SA
Publication of EP0794056A1 publication Critical patent/EP0794056A1/de
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F5/00—Rotary letterpress machines
    • B41F5/22—Rotary letterpress machines for indirect printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F7/00—Rotary lithographic machines
    • B41F7/02—Rotary lithographic machines for offset printing
    • B41F7/08—Rotary lithographic machines for offset printing using one transfer cylinder co-operating with several forme cylinders for printing on sheets or webs, e.g. sampling of colours on one transfer cylinder

Definitions

  • the present invention relates to a printing method in color and more particularly but not exclusively a process and machine for dry offset printing.
  • a plurality of blankets are used mounted on a rotary cylinder and loaded successively with the different inks.
  • the inks are deposited on each blanket using respective application rollers with raised portions formed on plates by photoengraving from a negative.
  • One known method is to decompose the original into color that we want to reproduce in an overlay of images monochromatic halftone, the density variations of each monochromatic image being restored by varying the size of the points of the frame, known as amplitude modulation.
  • the frames of the different monochromatic images are inclined to each other to reduce the moire phenomenon on printing.
  • the subject of the present invention is a new process printing which in particular makes it possible to remedy the problem of ink pollution posed by offset printing processes dry of the prior art.
  • the invention also relates, more generally, to ability to print image rich in color nuances without having to create colors or shades of colors by mixing inks different colors when printing.
  • the invention also aims to eliminate the phenomena of moiré when many shades are printed.
  • the invention thus finds general application to all printing devices and goes beyond printing dry offset.
  • the image represents for example a face
  • the invention is advantageously used to print consumer goods, in the measurement of the visual perception of the image printed on objects exposed to the sale, by a potential buyer, may be decisive.
  • the invention can also be used to produce high quality reproductions of paintings or photographs.
  • the shades of at least one base color have the same saturation but different brightnesses.
  • the shades of a basic color that have same saturation but different brightnesses can be restored during printing thanks to a more or less less black ink within the elementary surfaces of the support which are concerned with obtaining said nuances during of printing.
  • each elementary surface is printed on the support an ink point whose shape and size depend on a predetermined relationship of the shade of the base color to reproduce.
  • the ink dots When printing is done by bringing the media to contact of a surface charged with ink, with a direction of displacement substantially tangential to said loaded surface in ink, the ink dots advantageously exhibit, when they do not do not fill the entire extent of the associated elementary surface, a form adapted to reduce the fattening phenomenon, and preferably a substantially elongated and tapered shape in the direction of movement of the support.
  • the elementary surfaces are in majority only partially printed and choosing a layout adapted ink dots inside these surfaces elementary we can get a set of ink dots disjoint, which avoids the phenomenon called "contact” which consists of spreading the ink in the contact region of two contiguous ink dots, due to the phenomena of capillarity.
  • Such a suitable arrangement of ink dots at the within the corresponding elementary surfaces on the support can consist in centering each ink point in the surface associated elementary.
  • At less shade is obtained, for at least one of the colors of base, by printing a predetermined pattern such as a logo.
  • several shades of at least one of the basic colors are obtained by printing, in a greater or lesser proportion of a predetermined pattern such as logo.
  • the pattern is difficult to reproduce because invisible to the naked eye, we thus have a means likely to contribute very advantageously to the authentication of the printed medium.
  • the invention also relates to a printing machine having ink application surfaces respectively charged by ink dots respectively located within elementary surfaces arranged in a distribution predetermined, so as to visually reconstruct, during printing on a medium, the image to be reproduced, the color of each ink point being chosen from a predetermined set basic colors, each elementary surface given being covered with ink in a proportion chosen according to the shade to be reproduced, the number of shades being at least three for at least one of the basic colors.
  • the invention also relates to a printing machine dry offset comprising at least one blanket and rollers application bearing reliefs arranged so as to deposit on said blanket a set of ink dots respectively located within elementary surfaces arranged in a distribution predetermined so as to visually reconstruct during printing on a medium the image to be reproduced, the color of each ink point being chosen from a predetermined set basic colors, each elementary surface given being covered with ink in a proportion chosen according to the shade to be reproduced, the number of shades being at least three for at least one of the basic colors.
  • each relief intended to deposit a point ink within an elementary surface to reproduce a intermediate shade has a substantially elongated shape and tapering in the direction of movement of the support when printing so as to reduce the dot gain at the impression.
  • the invention also relates to a printing medium.
  • a printing medium having an outer surface on which a image consisting of a set of ink dots respectively located within elementary surfaces arranged in a predetermined distribution, the colors of said ink dots being chosen from a predetermined set of basic colors, each dot of ink of a given base color filling a greater or lesser proportion of the elementary surface corresponding, depending on the shade of said base color to reproduce, the number of shades being at least three for at least minus one of the basic colors.
  • At least one shade of the printed medium is obtained, for one of the basic colors, by a pattern predetermined such as a logo, more or less printed depending on the shade to reproduce.
  • FIG. 1 schematically, a dry offset printing machine 1 of a type known per se, comprising a plurality of blankets 2 placed on the periphery of a rotary cylinder 3 to come successively, during the rotation of the latter, in contact with application rollers 4 intended to deposit on these blankets 2 ink dots of different colors.
  • These application rollers 4 rotate around axes of rotation parallel to each other and to the axis of rotation of the cylinder 3.
  • Their external surface is constituted for each by a plate curved with reliefs projecting radially towards the exterior and on which an ink is deposited by means of a associated coating roller 5, regularly supplied with ink.
  • the O objects to be printed are brought by means of a carousel not shown one after the other each in contact a blanket 2 ready for ink transfer.
  • Each object O rolls on the associated blanket 2 so that the inks of different colors deposited on it are transferred.
  • the original 6 can be an RGB coded image usable by software version 2.5 "Photoshop”, marketed by the company “ADOBE SYSTEMS FRANCE "in noisy-Le-Grand.
  • a number n of basic colors corresponding substantially, in the example particular described, in the different shades of the inks which will be used in the dry offset printing machine 1.
  • n is chosen the more often equal to 6.
  • a subsequent step 8 is imposed p particular colors, including for example the orange shade used to printing warning logos to bomb users aerosol, or a color chosen to print text.
  • the image obtained in step 10 visually reconstructs original 6 to be reproduced.
  • each base color is limited to two, i.e. each elementary surface is either completely colored by a base color, either is not colored at all and then leaves appear the background color, which is assumed here to be uniformly white.
  • step 9 If the visual rendering of the surface composition is not entirely satisfactory, we come back to the previous step 9 of determining the n-p colors not imposed, to modify one or more colors and we examine when returning to step 10 the new image obtained.
  • the original 6 in color is a RGB coded image where the color (including hue) of each pixel is coded on 24 bits and we use to constitute the composition of colored elementary surfaces the function of creation of an indexed image of the aforementioned "Photoshop" software.
  • This function allows you to switch from an RGB coded image where the color (including hue) of each pixel is coded on 24 bit to an indexed image where the color (including hue) of each pixel is coded with a limited number of bits referring to reference colors whose color (including the nuance) is coded on 24 bits.
  • Such a function is originally intended to decrease clutter in the computer memory of images to which it is applied.
  • the composition of colored elementary surfaces is broken down in step 12, into n monochromatic images 12 1 , ..., 12 n to be superimposed.
  • FIG. 3 shows a fragment 12 o of the composition of colored elementary surfaces.
  • This fragment 12 o is constituted by a set of elementary surfaces of constant size and regularly juxtaposed, the color of which is chosen from a predetermined number of basic colors, equal to five in the example considered.
  • Negatives 13 1 to 13 n are produced in the following step 13 respectively from the n monochromatic images 12 1 to 12 n , which will be used for the subsequent etching, in step 14, of the n plates of the application rollers 4.
  • step 15 When using machine 1, all of the application rollers 4 deposit in step 15 on each blanket 2 ink dots of the same size, square in the example considered, regularly juxtaposed, and whose distribution in color function is linked to that of the different pixels on the image obtained in step 10 of the process.
  • the ink dots deposited on each blanket 2 are transferred in step 16 to the object to be printed.
  • FIG. 12 shows an image obtained by a method according to the prior art.
  • the image is constituted by the superposition of images monochromatic halftone, with different weft angles, density variations on monochromatic images being translated by a variation in the size of the points constituting the frame.
  • FIG. 13 An example is shown in Figure 13 a image obtained by implementing the first example process.
  • This image is made up of a composition of colored elementary surfaces, the elementary surfaces being squares of the same size and regularly juxtaposed.
  • the surface of the object on which the image is printed is assumed to be of a tint uniform, white and we will notice on the image shown in the figure 13 the absence, in places, of ink dots within said composition of colored elementary surfaces, leaving thus appear the background color.
  • the original 6 in color is broken down in a composition of elementary surfaces colored with shades selected from n basic colors and m shades by base color.
  • step 7 the number of basic colors n and shades m by basic colors, and in step 8 'we impose the where appropriate certain basic colors and / or shades.
  • step 9 the remaining n-p shades, taking for example the statistically predominant shades in the original in color and not already selected.
  • a composition of colored elementary surfaces said elementary surfaces being arranged in a predetermined distribution, the color of each elementary surface being chosen from among the n colors of base and their nuances, the choice of base color and nuance attributed to each of said elementary surfaces being carried out in such a way that said surface composition colored elementals visually reconstruct the image to be reproduced.
  • Decomposition of the original in color into n colors base with m shades per base color can be done in using the aforementioned "Photoshop” software, thanks to the function of transition from an RGB coded image to an indexed image.
  • step 10 'of the process the composition of elementary colored surfaces by means of a video screen connected to the computer.
  • the elementary surfaces are formed by squares regularly juxtaposed, as illustrated by figure 9.
  • step 7 'of choosing the basic colors and shades if the image obtained in step 10 'of the process is not satisfactory, by example due to the choice of certain basic colors imposed.
  • composition of colored elementary surfaces is then broken down in step 12 'of the process into a set of images monochromatic.
  • FIG. 5 shows a fragment 12 o 'of a composition of elementary colored surfaces and the rendering of the nuances of the basic colors is illustrated by a more or less large filling of each surface. elementary.
  • This figure has also illustrated the decomposition of the composition of colored elementary surfaces into monochromatic images 12 1 ′ to 12 5 ′.
  • the images monochromatic obtained from the decomposition of the image indexed obtained in step 10 'of the process can have the same aptitude for the restitution of details as this. So the contrast can be located thanks to the invention on the image printed exactly like the indexed image used to take monochromatic images. It is therefore possible avoid, thanks to the invention, the loss of visual definition encountered in the processes of the prior art and due to a difference in resolution between the original image and the resolution of the frame of the monochromatic images used for the engraving of plates and obtained from this starting image.
  • step 15 the ink dots, which are transferred in step 16 to the object to be printed.
  • each ink point is centered in the corresponding elementary surface.
  • FIG. 6 shows by way of example three ink dot shapes corresponding respectively to a increasing occupation of the associated elementary surface, for reproduce three shades of a basic color corresponding to increasing binary values representative of one more nuance more saturated.
  • ink dot shape allowing restore a shade by covering in a chosen proportion the associated elementary surface is advantageously carried out by taking account of problems related to fattening.
  • the shape of the ink dots can also be adapted the nature of each ink used.
  • FIG. 8 shows a ink point elongated and tapered in the direction of scrolling of the support to be printed, materialized by an arrow on this figure.
  • FIG. 7 shows three ink dot shapes corresponding to three different shades of a basic color, these ink dots corresponding to the drawing progressive, and preferably according to a random filling, of a predetermined pattern representing an O.
  • the complete printing of the motif inside a elementary surface corresponds to a predetermined shade having a certain degree of saturation.
  • Any more saturated shade corresponding to a proportion greater colored area within the elementary area is obtained by filling in a given proportion the surface of said elementary surface which is external to the envelope of the pattern, preferably randomly.
  • FIG. 14 shows a composition of colored elementary surfaces obtained by the process according to the invention, these elementary surfaces being constituted by squares regularly juxtaposed.
  • Each elementary surface is either uncoloured, to which case it lets appear the background color, either colored by one of the three colors A, B and C, the nuances being translated by respective points of different sizes as illustrated in this figure.
  • each ink point arranged at the within an elementary surface constituted by a square, represents the same pattern, more or less drawn, depending on the shade to be restored.
  • each square can have on the printed medium 127 ⁇ m side for example, which is equivalent at a resolution of 200 lines per inch (79 lines per cm).
  • the point size when separated by a distance equal to their diameter is 95 ⁇ m.
  • This dimension is considered to be the dimension for which the visibility of an isolated point is optimal, because when the points are less close together they are smaller and harder to spot and when the dots are closer, they are bigger and it is more difficult to discern each point individually.
  • the best resolution provided by the invention can give the viewer an impression of finesse of the image observed.
  • the dots completely filling an associated elementary surface on the support are in the minority and we can tolerate that two points overlap slightly during of printing due to the fattening phenomenon, without fear a major problem of ink pollution with printing in the case of dry offset.
  • a color by its hue, its luminosity and its saturation.
  • the example of a method according to the invention which is now described aims to further expand the number of shades can be used to reproduce the original in color, making vary the brightness parameter downwards, i.e. depending on the direction E in FIG. 19, from a shade corresponding to given degrees of brightness and saturation.
  • black ink is deposited in a greater or lesser proportion within the elementary surface which is also colored in a proportion chosen according to the saturation of the shade to be reproduced.
  • FIG. 20 shows a first row of five elementary surfaces 20 (1) to 20 (5) which are colored in increasing proportion by a given ink.
  • the surface 20 (1) is not colored at all and the surface 20 (5) is completely colored.
  • the surfaces 20 (4) and 20 (5) which each correspond to given degrees of brightness and saturation are used to generate, by progressive addition of black, second and third families of shades, referenced respectively 20 (4) (i) to 20 (4) (v) and 20 (5) (i) to 20 (5) (v) .
  • black ink allows increase the number of nuances used to decompose the original into color, since it allows to reproduce variations of brightness at substantially constant saturation.
  • Adding black ink can be done in one operation after depositing all other inks, such as illustrated in figure 21.
  • This deposit of black ink can be carried out after printing of the other colors used.
  • distribution 22 of the elementary surfaces for example one of the distributions illustrated in FIGS. 9 to 11 and we choose the set 23 of the basic colors and shades of these basic colors in which we want to perform the decomposition of the original to be reproduced.
  • step 25 the indexed image obtained in step 24 in a plurality of monochromatic images, each image corresponding to a given basic color A, B, C, etc ....
  • step 26 the monochromatic images A, B, C, ... are broken down into respective images AN A , BN B , CN C , ... grouping the shades which do not involve the color black and by respective images N A , N B , N C , ... using only the color black.
  • step 27 The different images N A , N B , N C , ... are superimposed in step 27 to obtain a monochromatic image N in black and white.
  • the size of the ink point to be deposited on the support to restore this shade is determined for each shade and a pattern occupying the elementary surface of the support is assigned in step 29 to each stitch size in the desired proportion.
  • a plurality of monochromatic images M A , M B , M C , ... and M N are obtained in which the shades are restored by the presence within each elementary surface of an ink point of shape and size predetermined and negatives are produced if necessary from these monochromatic images used to produce the printing rollers.
  • black ink can be applied directly on the ink previously printed on the support as illustrated in figure 23.
  • the invention thus advantageously applies to other printing processes as dry offset printing for example printing by screen printing, sublimation or other, the shape of printed dots that can be adapted to each print mode so as to compensate for the defects.
  • the invention is particularly well suited to printing coded images in digital form.
  • the invention can allow you to benefit from the advantages specific to frames conventional so-called frequency modulation and modulation of amplitude, namely on the one hand the sharpness of the printed image (of by the localization of the contrast identical to the image of departure) and on the other hand the impression of softness (due to the spacing constant of the grid points), without the disadvantages of these grid conventional, namely a noise effect for the weft frequency modulation and blurring for the frame at amplitude modulation.

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  • Mechanical Engineering (AREA)
  • Printing Methods (AREA)

Claims (34)

  1. Verfahren zum Drucken eines farbigen Bildes auf einem Träger, dadurch gekennzeichnet, dass es die Schritte umfasst, die darin bestehen,
    dass das zu reproduzierende Bild in eine Zusammenstellung von farbigen Einzelflächen zerlegt wird (24), wobei diese Einzelflächen in einer vorbestimmten Verteilung (22) angeordnet sind, die Farbe jeder Einzelfläche aus einer vorbestimmten Gruppe von Basisfarben und einer vorbestimmten Gruppe von Nuancen dieser Basisfarben ausgewählt wird (23), die Anzahl von Nuancen bei mindestens einer Basisfarbe größer als oder gleich drei ist und die Wahl der Basisfarbe und der jeder dieser Einzelflächen zugeteilten Nuance so vorgenommen wird, dass diese Zusammenstellung von farbigen Einzelflächen (24) das zu reproduzierende Bild visuell wiedergibt,
    dass diese Zusammenstellung von farbigen Einzelflächen auf diesem Träger mit Hilfe von Druckfarben gedruckt wird, deren Farbtöne so gewählt werden, dass die Basisfarben und ihre Nuancen beim Drucken unter Berücksichtigung der Farbe des Trägers reproduziert werden können, wobei die einer gegebenen Einzelfläche zugeteilte Nuance einer Basisfarbe beim Drucken erhalten wird, indem auf den Anteil jeder Druckfarbe im Inneren der entsprechenden Einzelfläche auf dem Träger eingewirkt wird.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass mindestens eine der Basisfarben eine andere Nichtgrundfarbe als Schwarz ist.
  3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Nuancen mindestens einer Basisfarbe gleiche Sättigung, aber verschiedene Helligkeiten haben.
  4. Verfahren nach Anspruch 3, dadurch gekennzeichnet, dass die Nuancen einer Basisfarbe, die gleiche Sättigung, aber verschiedene Helligkeiten haben, beim Drucken durch einen mehr oder weniger großen Anteil an schwarzer Druckfarbe im Inneren der Einzelflächen des Trägers wiedergegeben werden, in denen diese Nuancen beim Drucken erhalten werden sollen.
  5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass, wenn ein und dieselbe Einzelfläche des Trägers gleichzeitig von einem Auftrag von schwarzer Druckfarbe und von einem Auftrag einer anderen Druckfarbe als Schwarz betroffen ist, der Auftrag der schwarzen Druckfarbe und der anderen Druckfarbe als Schwarz mit für jede der Druckfarben vorbestimmten Motiven stattfindet, die gewählt werden, um die Überlagerung der beiden Druckfarben zu vermeiden.
  6. Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass der Auftrag der schwarzen Druckfarbe mit Überlagerung mindestens einer anderen bereits auf den Träger aufgetragenen Druckfarbe stattfindet.
  7. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass es auf den Trockenoffsetdruck angewandt wird.
  8. Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Basisfarben Nichtgrundfarben sind.
  9. Verfahren nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass mindestens alle Druckfarben minus einer Farbtöne besitzen, die aus diesen Basisfarben ausgewählt sind.
  10. Verfahren nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass die Einzelflächen gleiche Form haben.
  11. Verfahren nach Anspruch 11, dadurch gekennzeichnet, dass die Einzelflächen sich alle voneinander durch Translation ableiten.
  12. Verfahren nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass die Einzelflächen nebeneinandergesetzt sind.
  13. Verfahren nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, dass die Einzelflächen Quadrate sind.
  14. Verfahren nach einem der Ansprüche 1 bis 13, dadurch gekennzeichnet, dass jeder Druckfarbepunkt in der entsprechenden Einzelfläche zentriert ist.
  15. Verfahren nach einem der Ansprüche 1 bis 14, dadurch gekennzeichnet, dass man in jeder Einzelfläche auf dem Träger einen Druckfarbepunkt druckt, dessen Form und Größe gemäß einer vorbestimmten Beziehung von der zu reproduzierenden Nuance der Grundfarbe abhängen.
  16. Verfahren nach Anspruch 15, bei dem das Drucken stattfindet, indem man den zu bedruckenden Träger mit einer mit Druckfarbe geladenen Fläche in einer zu dieser Fläche im wesentlichen tangentialen Bewegungsrichtung in Kontakt bringt, dadurch gekennzeichnet, dass diese Druckfarbepunkte, wenn sie nicht die ganze Ausdehnung der zugeordneten Einzelfläche ausfüllen, eine Form aufweisen, die an eine Reduzierung der Verfettungserscheinung angepasst ist, und zwar vorzugsweise eine in der Bewegungsrichtung des Trägers im wesentlichen langgestreckte und sich verjüngende Form.
  17. Verfahren nach einem der Ansprüche 1 bis 16, dadurch gekennzeichnet, dass eine Nuance beim Drucken bei mindestens einer der Basisfarben durch das Drucken eines vorbestimmten Motivs wie eines Logo erhalten wird.
  18. Verfahren nach Anspruch 17, dadurch gekennzeichnet, dass mehrere Nuancen mindestens einer der Basisfarben durch das Drucken eines vorbestimmten Motivs wie eines Logo in einem mehr oder weniger großen Anteil erhalten werden.
  19. Verfahren nach einem der Ansprüche 1 bis 18, dadurch gekennzeichnet, dass die Druckfarben in Form von Druckfarbepunkten aufgebracht werden, deren Geometrie je nach der verwendeten Druckfarbe verschieden ist.
  20. Verfahren nach einem der Ansprüche 1 bis 19, dadurch gekennzeichnet, dass der Träger vor dem Druck weiß ist.
  21. Druckmaschine (1), die Druckfarbeauftragflächen (4) aufweist, die jeweils mit Druckfarbepunkten geladen sind, die jeweils im Inneren von Einzelflächen gelegen sind, die in einer vorbestimmten Verteilung angeordnet sind, so dass bei dem Drucken auf einem Träger (0) visuell ein zu reproduzierendes Bild wiedergegeben wird, wobei die Farbe jedes Druckfarbepunktes aus einer vorbestimmten Gruppe von Basisfarben ausgewählt ist und jede gegebene Einzelfläche in einem Anteil mit Druckfarbe bedeckt wird, der in Abhängigkeit von der zu reproduzierenden Nuance gewählt ist, wobei die Anzahl von Nuancen bei mindestens einer Basisfarbe mindestens drei beträgt.
  22. Maschine nach Anspruch 21, dadurch gekennzeichnet, dass mindestens eine der Basisfarben eine andere Nichtgrundfarbe als Schwarz ist.
  23. Druckmaschine nach Anspruch 21 oder 22, dadurch gekennzeichnet, dass die Farben der Druckfarbepunkte Nichtgrundfarben sind.
  24. Trockenoffset-Druckmaschine (1), die mindestens ein Drucktuch (2) und Auftragrollen (4) aufweist, die Erhebungen tragen, die so angeordnet sind, dass auf das Drucktuch eine Gruppe von Druckfarbepunkten aufgetragen wird, die jeweils im Inneren von Einzelflächen gelegen sind, die in einer vorbestimmten Verteilung angeordnet sind, so dass bei dem Drucken auf einem Träger (0) ein zu reproduzierendes Bild visuell wiedergegeben wird, wobei die Farbe jedes Druckfarbepunktes aus einer vorbestimmten Gruppe von Basisfarben ausgewählt ist und jede gegebene Einzelfläche in einem Anteil mit Druckfarbe bedeckt wird, der in Abhängigkeit von der zu reproduzierenden Nuance gewählt ist, wobei die Anzahl von Nuancen bei mindestens einer Basisfarbe mindestens drei beträgt.
  25. Trockenoffset-Druckmaschine nach Anspruch 24, dadurch gekennzeichnet, dass jede Erhebung, die dazu bestimmt ist, im Inneren einer Einzelfläche Druckfarbe aufzutragen, um eine Nuance zu reproduzieren, eine in der Bewegungsrichtung des zu bedruckenden Trägers im wesentlichen langgestreckte und sich verjüngende Form aufweist.
  26. Druckträger (0), der eine Außenfläche aufweist, auf der ein Bild aufgedruckt wurde, das von einer Gruppe von Druckfarbepunkten gebildet ist, die jeweils im Inneren von Einzelflächen gelegen sind, die in einer vorbestimmten Verteilung angeordnet sind, wobei die Farben dieser Druckfarbepunkte aus einer vorbestimmten Gruppe von Basisfarben ausgewählt ist und jeder Druckfarbepunkt einer gegebenen Basisfarbe je nach der zu reproduzierenden Nuance dieser Basisfarbe einen mehr oder weniger großen Anteil der entsprechenden Einzelfläche ausfüllt, wobei die Anzahl von Nuancen bei mindestens einer der Basisfarben mindestens drei beträgt.
  27. Druckträger nach Anspruch 26, dadurch gekennzeichnet, dass mindestens eine der Basisfarben eine andere Nichtgrundfarbe als Schwarz ist.
  28. Druckträger nach Anspruch 26 oder 27, dadurch gekennzeichnet, dass die Einzelflächen gleiche Form haben.
  29. Druckträger nach einem der Ansprüche 26 bis 28, dadurch gekennzeichnet, dass die Einzelflächen nebeneinandergesetzt sind.
  30. Druckträger nach einem der Ansprüche 26 bis 29, dadurch gekennzeichnet, dass jede Einzelfläche aus einem Quadrat besteht.
  31. Druckträger nach einem der Ansprüche 26 bis 30, bei dem die Außenfläche zylindrisch ist, dadurch gekennzeichnet, dass die Druckfarbepunkte, wenn sie die entsprechende Einzelfläche nicht vollständig ausfüllen, eine in der Bewegungsrichtung des Trägers bei dem Drucken im wesentlichen langgestreckte und sich verjüngende Form aufweisen.
  32. Druckträger nach einem der Ansprüche 26 bis 31, dadurch gekennzeichnet, dass jeder Druckfarbepunkt im Inneren der entsprechenden Einzelfläche zentriert ist.
  33. Druckträger nach einem der Ansprüche 26 bis 32, dadurch gekennzeichnet, dass mehrere Nuancen mindestens einer Basisfarbe durch das Drucken eines vorbestimmten Motivs wie eines Logo in einem mehr oder weniger großen Anteil wiedergegeben sind.
  34. Druckträger nach einem der Ansprüche 26 bis 33, dadurch gekennzeichnet, dass mindestens eine Einzelfläche einen schwarzen Druckfarbepunkt und einen Punkt einer anderen Druckfarbe als Schwarz erhalten hat, wobei die Größe des schwarzen Druckfarbepunkts von der Helligkeit der zu reproduzierenden Nuance abhängt.
EP97400521A 1996-03-08 1997-03-07 Verfahren und Druckvorrichtung zur Durchführung des Verfahrens und dadurch gedruckte Druckträger Expired - Lifetime EP0794056B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR9602948 1996-03-08
FR9602948A FR2745749B1 (fr) 1996-03-08 1996-03-08 Procede d'impression offset a sec, machine mettant en oeuvre ledit procede et dispositif de conditionnement ainsi imprime
FR9609563 1996-07-30
FR9609563A FR2745750B1 (fr) 1996-03-08 1996-07-30 Procede et machine d'impression pour la mise en oeuvre du procede et support ainsi imprime

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EP0794056A1 EP0794056A1 (de) 1997-09-10
EP0794056B1 true EP0794056B1 (de) 2000-07-12

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US (1) US5806426A (de)
EP (1) EP0794056B1 (de)
JP (1) JP3253884B2 (de)
BR (1) BR9701234A (de)
CA (1) CA2199413C (de)
DE (1) DE69702465T2 (de)
ES (1) ES2150199T3 (de)
FR (1) FR2745750B1 (de)

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DE102006056475A1 (de) * 2006-11-28 2008-05-29 Kba-Metronic Ag Mehrbahnige CD-Bedruckungsanlage
WO2008147476A1 (en) * 2007-01-23 2008-12-04 Cvdevices, Llc Devices, systems, and methods for endoscopic gastric magnetic restriction
US20080232884A1 (en) * 2007-03-22 2008-09-25 Cadlink Technology Corporation Method for printing onto coloured substrates
ATE534526T1 (de) * 2007-10-19 2011-12-15 Khs Gmbh Vorrichtung zum bedrucken von flaschen oder dergleichen behältern an der behälteraussenfläche
DE102008012385A1 (de) * 2008-03-04 2009-09-10 Wifag Maschinenfabrik Ag Offsetdruck mit reduziertem Farbauftrag
US8400681B1 (en) * 2009-06-10 2013-03-19 Girard J. Moravcik Enhanced halftone screening method for the dry offset printing process
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US20140125730A1 (en) * 2012-11-07 2014-05-08 Xerox Corporation Method for Printing Phase Change Ink onto Porous Media
DE102016121000B4 (de) * 2016-11-03 2022-07-14 Ardagh Metal Packaging Europe Gmbh Verfahren zum Dekorieren von Behältern und Vorrichtung zum Durchführen des Verfahrens

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Also Published As

Publication number Publication date
FR2745750B1 (fr) 1998-04-30
CA2199413A1 (fr) 1997-09-08
FR2745750A1 (fr) 1997-09-12
DE69702465D1 (de) 2000-08-17
JPH10847A (ja) 1998-01-06
US5806426A (en) 1998-09-15
JP3253884B2 (ja) 2002-02-04
MX9701761A (es) 1998-03-31
EP0794056A1 (de) 1997-09-10
CA2199413C (fr) 2004-03-30
BR9701234A (pt) 1998-09-22
DE69702465T2 (de) 2001-04-12
ES2150199T3 (es) 2000-11-16

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