EP1230089A1 - Inking plate for rotary printing machine - Google Patents

Inking plate for rotary printing machine

Info

Publication number
EP1230089A1
EP1230089A1 EP00960283A EP00960283A EP1230089A1 EP 1230089 A1 EP1230089 A1 EP 1230089A1 EP 00960283 A EP00960283 A EP 00960283A EP 00960283 A EP00960283 A EP 00960283A EP 1230089 A1 EP1230089 A1 EP 1230089A1
Authority
EP
European Patent Office
Prior art keywords
plate
inking
layer
pvc
cylinder
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.)
Granted
Application number
EP00960283A
Other languages
German (de)
French (fr)
Other versions
EP1230089B8 (en
EP1230089B1 (en
Inventor
Raffaele Fina
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KBA Notasys SA
Original Assignee
KBA Giori SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by KBA Giori SA filed Critical KBA Giori SA
Publication of EP1230089A1 publication Critical patent/EP1230089A1/en
Application granted granted Critical
Publication of EP1230089B1 publication Critical patent/EP1230089B1/en
Publication of EP1230089B8 publication Critical patent/EP1230089B8/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N7/00—Shells for rollers of printing machines
    • B41N7/06—Shells for rollers of printing machines for inking rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/26—Construction of inking rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N2207/00—Location or type of the layers in shells for rollers of printing machines
    • B41N2207/02—Top layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N2207/00—Location or type of the layers in shells for rollers of printing machines
    • B41N2207/14—Location or type of the layers in shells for rollers of printing machines characterised by macromolecular organic compounds

Definitions

  • the present invention relates to an inking plate for a rotary printing machine, intended to be mounted on a cylinder, formed at least of a base plate and of material deposited on said plate, said material being intended to be cut into zones. in relief whose contours correspond to those of the surfaces to be inked.
  • the present invention also relates to a printing machine comprising such a printing plate mounted on a cylinder and to a method for producing such a plate.
  • inking plates mounted on inking cylinders are known in the field of rotary printing machines, whether for direct or indirect inking.
  • a collector-inking cylinder is used on which the necessary ink is transferred from selector cylinders, also called inking cylinders.
  • selector cylinders also called inking cylinders.
  • Each of these ink cylinders is associated with a determined inkwell and therefore with a given color.
  • the collecting cylinder then transfers the ink corresponding to the different colors to the printing plates.
  • direct inking on the other hand, the ink is transferred to the printing plates directly from the ink cylinders, without using a collecting cylinder.
  • the ink rollers in a manner known in the prior art, have a hard material surface, for example plastic, metal or even hard rubber, this surface being cut so as to form zones in relief whose contours correspond exactly to those of the areas to be printed in a given color. These raised areas are formed by known cutting means, for example the laser.
  • Such ink rollers are described for example in European patent application EP 0 406 157 or in US patent 5,282,417 which shows such ink rollers mounted in a printing machine using both direct and indirect inking techniques.
  • this type of ink roller has disadvantages.
  • when they are worn that is to say when the raised areas are worn, it is necessary to disassemble the cylinders of the printing machine, to redeposit a layer of plastic or other material on its circumference , to cut again the desired raised areas and finally to reassemble the cylinders in the machine which requires to make long and complicated adjustments to find a correct register of the different impressions on the collector-inking cylinder or on the cylinder plate.
  • a first solution which makes it possible to remedy some of these disadvantages consists in using inking plates comprising a photopolymer coating which are mounted on cylinders replacing the known inking cylinders. It is thus possible to prepare these plates independently, in particular by forming the raised areas using a photogravure process, but these photopolymeric plates also have disadvantages.
  • the creation of the raised areas must be done flat so that these raised areas are deformed when mounting the plates on the cylinder. It is therefore essential to take this deformation into account during the creation of the raised areas.
  • the diameter of the cylinders on which the plates will be mounted also has an influence on the deformation. The life of these photopolymeric plates, in addition to their price, is also unfavorable.
  • the lifetime of these photopolymeric plates is much lower than that of the ink cylinders mentioned above.
  • the photopolymeric material has a lower elasticity than that of the materials used for the ink cylinders so that the inking is sometimes insufficient, especially in a direct inking process.
  • the object of the invention is to improve the known inking systems.
  • the invention aims to provide an inking plate which overcomes the drawbacks of known plates.
  • the invention also aims to provide a method for producing such an inking plate, an inking cylinder carrying such an inking plate and a rotary printing machine using such an inking plate.
  • the inking plate according to the invention is defined by the characterizing part of claim 1.
  • the advantages of the plate according to the invention are numerous. On the one hand, one can mention the fact that such plates are much less expensive to produce and that their lifespan is much longer than that of photopolymeric plates. In addition, their manufacture is much simpler since the raised zones are created on plates mounted on cylinders so that these zones are not deformed when installing the plates in a printing machine.
  • Claims 2 to 6 define specific embodiments of the inking plate.
  • Independent claim 7 defines a printing machine ink cylinder comprising at least one ink plate according to the invention, and independent claim 8 a printing machine comprising at least one such cylinder.
  • Independent claim 9 defines a method for producing a plate according to the invention.
  • Figure 1 is a schematic sectional view of a rotary printing machine using both direct and indirect inking techniques.
  • Figure 2 is a sectional view of a plate 1 according to the invention.
  • Figure 3 is a schematic sectional view of an ink cylinder carrying a plate according to the invention.
  • Figure 4 shows a sectional view of a base plate mounted on a preparation cylinder for depositing the layers.
  • Figure 5 is a block diagram illustrating the method of producing an inking plate according to the invention.
  • the printing machine shown in Figure 1 is a convertible intaglio printing machine which allows the use of a direct or indirect inking process.
  • This machine comprises three modules I, II and III, direct inking being carried out in module I which comprises a printing cylinder 1, a plate cylinder 2, a wiping cylinder 3 and an ink cylinder 4 associated with an inkwell 5.
  • the indirect inking is carried out by the modules II and III, which comprise a collector-inking cylinder 6 inked by inking cylinders 7 located in the module II associated with the inkwells 8.
  • the patterns corresponding to the raised areas of the inking cylinders 7 are collected on the collector-inking cylinder 6 and are then transferred from this collector cylinder 6 to the plate cylinder 2.
  • Such a rotary printing machine is known from US Patent 5,282,417 for example, incorporated by reference in the present application.
  • FIG. 2 An inking plate according to the invention is shown in section in FIG. 2.
  • This inking plate 10 consists of a base plate 11, preferably made of metal, for example stainless steel, having two ends 12, 13 provided for its attachment to a cylinder 20 (see Figure 3).
  • a layer of adhesive 14 was first deposited which covers the surface of the plate 11 with the exception of the two ends 12, 13 used for fixing.
  • a first layer 26 of a first PVC composition was then deposited and over this first layer 26, a second layer 15 of a second PVC composition was deposited in which reliefs 16 have been trimmed. These reliefs 16 correspond exactly to patterns on the plate which must be inked in a specific color.
  • this plate with two layers of PVC is used for direct inking, the second layer 15 being softer than the first layer 26 of PVC.
  • FIG. 3 schematically illustrates the inking plate 10 mounted on an inking cylinder 17.
  • the plate 10 which corresponds to that of FIG. 2, comprises the base plate 11, the layer of adhesive 14, the two layers 26 and 15 of PVC, reliefs 16 having been cut in the layer 15.
  • the ends 12 and 13 of the base plate 11 are held in a pit 18 of the cylinder 17 by an appropriate fixing system, for example pliers (not shown).
  • the system for fixing plates to a cylinder is known in the field of rotary printing machines.
  • patent EP 0 403 434 which is incorporated by reference into the present application, shows such a fixing system being mounted in the pit of a plate cylinder.
  • Such an inking cylinder 17 is then mounted in a printing machine as shown in FIG. 1, preferably in place of the cylinder 4 for direct inking, as indicated above.
  • FIG. 4 shows an inking plate in preparation, mounted on a preparation cylinder 20 suitable for depositing successive layers, said cylinder being mounted on a support 22.
  • the base plate 11 is mounted on this preparation cylinder 20 and held in position by a clamp system, represented schematically by the reference 23, located in the pit 21 of said cylinder 20.
  • the clamp system used can be that described above or any other equivalent system.
  • Said pit 21 is then closed by a cover 24 to prevent the glue and the PVC from entering it.
  • the cover 24 is fixed by screws 25 or by other equivalent means.
  • the adhesive layer 14 is deposited on the surface of the base plate 11 except on the surface of the cover 24. In the case shown in this figure, only one single layer of PVC 27 has been deposited: this configuration of plate corresponds to use in an indirect inking process.
  • the outer layer of PVC 27 is harder than the layer 15 of Figures 2 and 3, for plates used in a direct inking process.
  • the absence of glue on the cover 24 means that the PVC layer does not adhere to it and to remove the plate 10, it suffices to cut longitudinally, in the axial direction of the cylinder 20, ' the PVC along the edges of the cover to remove the layers of PVC covering said cover 24.
  • the fixing means of the cover 24 can then be undone and access the fixing means 23 of the plate 10 on the cylinder 20 and remove the plate 10.
  • the method for producing an inking plate according to the invention comprises the following steps: mounting a base plate on a preparation cylinder and fixing by appropriate means;
  • FIG. 5 This process is illustrated in FIG. 5 by a block diagram comprising the different steps.
  • an adhesive of the Decorral HF type (trade name) will be used, however other equivalent adhesives are possible.
  • PVC compositions are as follows.
  • the applied thickness of the layer of PVC will be 5 mm, the deposition of which can be carried out in two consecutive phases, each corresponding to a thickness of approximately 2.5 mm.
  • the surface can be rectified before the second layer of PVC is deposited.
  • the thickness of the layer 26 or 27 can be approximately 3 mm.

Abstract

The invention concerns an inking plate consisting of at least a base plate (11) and deposited material, the surface of said deposited material being designed to be cut into embossed zones (16) whereof the contours correspond to those of the surfaces to be inked. The deposited material consists of at least a PVC composition layer (15; 27) deposited distributed over the major part of the plate (11) surface.

Description

Plaque d'encrage pour machine d'impression rotativeInking plate for rotary printing machine
La présente invention concerne une plaque d'encrage pour machine d'impression rotative, destinée à être montée sur un cylindre, formée au moins d'une plaque de base et de matière déposée sur ladite plaque, ladite matière étant destinée à être découpée en zones en relief dont les contours correspondent à ceux des surfaces à encrer. La présente invention concerne également une machine d'impression comportant une telle plaque d'impression montée sur un cylindre et un procédé de production d'une telle plaque.The present invention relates to an inking plate for a rotary printing machine, intended to be mounted on a cylinder, formed at least of a base plate and of material deposited on said plate, said material being intended to be cut into zones. in relief whose contours correspond to those of the surfaces to be inked. The present invention also relates to a printing machine comprising such a printing plate mounted on a cylinder and to a method for producing such a plate.
Ces plaques d'encrage montées sur des cylindres d'encrage sont connues dans le domaine des machines d'impression rotatives que ce soit pour de l'encrage direct ou indirect. Dans le cas de l'encrage indirect, on utilise un cylindre collecteur-encreur sur lequel l'encre nécessaire est transférée depuis des cylindres sélecteurs, appelés aussi cylindres encreurs. Chacun de ces cylindres encreurs est associé à un encrier déterminé et par conséquent à une couleur donnée . Le cylindre collecteur transfère ensuite l'encre correspondant aux différentes couleurs sur les plaques d'impression. Dans le cas de l'encrage direct en revanche, l'encre est transférée sur les plaques d'impression directement depuis les cylindres encreurs, sans utiliser de cylindre collecteur.These inking plates mounted on inking cylinders are known in the field of rotary printing machines, whether for direct or indirect inking. In the case of indirect inking, a collector-inking cylinder is used on which the necessary ink is transferred from selector cylinders, also called inking cylinders. Each of these ink cylinders is associated with a determined inkwell and therefore with a given color. The collecting cylinder then transfers the ink corresponding to the different colors to the printing plates. In the case of direct inking, on the other hand, the ink is transferred to the printing plates directly from the ink cylinders, without using a collecting cylinder.
Les cylindres encreurs, de manière connue dans l'art antérieur, ont une surface en matière dure, par exemple plastique, métal ou encore caoutchouc durci, cette surface étant taillée de manière à former des zones en relief dont les contours correspondent exactement à ceux des zones à imprimer dans une couleur donnée. Ces zones en relief sont formées par des moyens connus de découpage, par exemple le laser. De tels rouleaux encreurs sont décrits par exemple dans la demande de brevet européen EP 0 406 157 ou dans le brevet US 5,282,417 qui montre de tels rouleaux encreurs montés dans une machine d'impression utilisant à la fois des techniques d'encrage direct et indirect.The ink rollers, in a manner known in the prior art, have a hard material surface, for example plastic, metal or even hard rubber, this surface being cut so as to form zones in relief whose contours correspond exactly to those of the areas to be printed in a given color. These raised areas are formed by known cutting means, for example the laser. Such ink rollers are described for example in European patent application EP 0 406 157 or in US patent 5,282,417 which shows such ink rollers mounted in a printing machine using both direct and indirect inking techniques.
Ce type de cylindres encreurs présente néanmoins des désavantages. En particulier, lorsqu'ils sont usés, c'est-à-dire lorsque les zones en relief sont usées, il est nécessaire de démonter les cylindres de la machine d'impression, de redéposer une couche de matière plastique ou autre sur sa circonférence, de tailler à nouveau les zones en relief désirées et finalement de remonter les cylindres dans la machine ce qui nécessite de procéder à des ajustages longs et compliqués pour retrouver un registre correct des différentes impressions sur le cylindre collecteur-encreur ou sur le cylindre porte-plaque.However, this type of ink roller has disadvantages. In particular, when they are worn, that is to say when the raised areas are worn, it is necessary to disassemble the cylinders of the printing machine, to redeposit a layer of plastic or other material on its circumference , to cut again the desired raised areas and finally to reassemble the cylinders in the machine which requires to make long and complicated adjustments to find a correct register of the different impressions on the collector-inking cylinder or on the cylinder plate.
Une première solution permettant de remédier à certains de ces désavantages consiste à utiliser des plaques d'encrage comportant un revêtement photopolymérique qui se montent sur des cylindres remplaçant les cylindres encreurs connus. L'on peut ainsi préparer ces plaques de manière indépendante, notamment en formant les zones en relief en utilisant un procédé de photogravure, mais ces plaques photopolymériques présentent elles aussi des désavantages. D'une part, l'on doit mentionner le fait que la création des zones en relief doit se faire à plat de sorte que ces zones en relief sont déformées lors du montage des plaques sur le cylindre. Il est donc indispensable de tenir compte de cette déformation pendant la création des zones en relief. En outre, le diamètre des cylindres sur lequel' les plaques seront montées a également une influence sur la déformation. La durée de vie de ces plaques photopolymériques , outre leur prix, est aussi défavorable. En effet, et en particulier dans des procédés faisant appel au principe de l'encrage direct de la plaque d'impression dont la température peut être élevée, la durée de vie de ces plaques photopolymériques est bien inférieure à celle des cylindres encreurs mentionnés ci-dessus. De plus, le matériau photopolymérique a une élasticité inférieure à celle des matières utilisées pour les cylindres encreurs de sorte que l'encrage est parfois insuffisant, surtout dans un procédé à encrage direct.A first solution which makes it possible to remedy some of these disadvantages consists in using inking plates comprising a photopolymer coating which are mounted on cylinders replacing the known inking cylinders. It is thus possible to prepare these plates independently, in particular by forming the raised areas using a photogravure process, but these photopolymeric plates also have disadvantages. On the one hand, it should be mentioned that the creation of the raised areas must be done flat so that these raised areas are deformed when mounting the plates on the cylinder. It is therefore essential to take this deformation into account during the creation of the raised areas. In addition, the diameter of the cylinders on which the plates will be mounted also has an influence on the deformation. The life of these photopolymeric plates, in addition to their price, is also unfavorable. Indeed, and in particular in processes using the principle of direct inking of the printing plate, the temperature of which may be high, the lifetime of these photopolymeric plates is much lower than that of the ink cylinders mentioned above. above. In addition, the photopolymeric material has a lower elasticity than that of the materials used for the ink cylinders so that the inking is sometimes insufficient, especially in a direct inking process.
Le but de l'invention est d'améliorer les systèmes d ' encrage connus .The object of the invention is to improve the known inking systems.
Plus particulièrement, l'invention a pour but de proposer une plaque d'encrage qui remédie aux inconvénients des plaques connues .More particularly, the invention aims to provide an inking plate which overcomes the drawbacks of known plates.
L'invention a également pour but de proposer un procédé de production d'une telle plaque d'encrage, un cylindre d'encrage portant une telle plaque d'encrage et une machine d'impression rotative utilisant une telle plaque d'encrage.The invention also aims to provide a method for producing such an inking plate, an inking cylinder carrying such an inking plate and a rotary printing machine using such an inking plate.
La plaque d'encrage selon l'invention est définie par la partie caractérisante de la revendication 1. Les avantages de la plaque selon l'invention sont nombreux. D'une part, l'on peut mentionner le fait que de telles plaques sont nettement moins onéreuses à produire et que leur durée de vie est bien plus longue que celle des plaques photopolymériques. En outre, leur fabrication est bien plus simple puisque les zones en relief sont créées sur des plaques montées sur des cylindres de sorte que ces zones ne sont pas déformées lors de 1 ' installation des plaques dans une machine d ' impression.The inking plate according to the invention is defined by the characterizing part of claim 1. The advantages of the plate according to the invention are numerous. On the one hand, one can mention the fact that such plates are much less expensive to produce and that their lifespan is much longer than that of photopolymeric plates. In addition, their manufacture is much simpler since the raised zones are created on plates mounted on cylinders so that these zones are not deformed when installing the plates in a printing machine.
Les revendications 2 à 6 définissent des modes d'exécution particuliers de la plaque d'encrage.Claims 2 to 6 define specific embodiments of the inking plate.
La revendication indépendante 7 définit un cylindre encreur de machine d'impression comportant au moins une plaque d'encrage selon l'invention, et la revendication indépendante 8 une machine d'impression comportant au moins un tel cylindre.Independent claim 7 defines a printing machine ink cylinder comprising at least one ink plate according to the invention, and independent claim 8 a printing machine comprising at least one such cylinder.
La revendication indépendante 9 définit un procédé de production d'une plaque selon l'invention.Independent claim 9 defines a method for producing a plate according to the invention.
Les revendications dépendantes 10 et 11 définissent des étapes particulières du procédé de production de la revendication 9.Dependent claims 10 and 11 define specific steps in the production process of claim 9.
L'invention sera mieux comprise par la description d'un mode d'exécution de celle-ci et des figures qui s'y rapportent . La figure 1 est une vue schématique en coupe d'une machine d'impression rotative utilisant à la fois des techniques d'encrage direct et indirect.The invention will be better understood by the description of an embodiment thereof and the figures relating thereto. Figure 1 is a schematic sectional view of a rotary printing machine using both direct and indirect inking techniques.
La figure 2 est une vue en coupe d'une plaque selon 1 ' invention.Figure 2 is a sectional view of a plate 1 according to the invention.
La figure 3 est une vue schématique en coupe d'un cylindre encreur portant une plaque selon l'invention.Figure 3 is a schematic sectional view of an ink cylinder carrying a plate according to the invention.
La figure 4 montre une vue en coupe d'une plaque de base montée sur un cylindre de préparation pour la dépose des couches .Figure 4 shows a sectional view of a base plate mounted on a preparation cylinder for depositing the layers.
La figure 5 est un schéma-bloc illustrant le procédé de production d'un plaque d'encrage selon l'invention.Figure 5 is a block diagram illustrating the method of producing an inking plate according to the invention.
La machine d'impression représentée à la figure 1 est une machine d'impression taille-douce convertible qui permet l'utilisation d'un procédé d'encrage direct ou indirect. Cette machine comprend trois modules I, II et III, l'encrage direct étant réalisé dans le module I qui comprend un cylindre d'impression 1, un cylindre porte-plaque 2, un cylindre d'essuyage 3 et un cylindre encreur 4 associé à un encrier 5. L'encrage indirect est réalisé par les modules II et III, qui comprennent un cylindre collecteur-encreur 6 encré par des cylindre encreurs 7 se trouvant dans le module II associés aux encriers 8. Ainsi, pour l'encrage indirect, les motifs correspondants aux zones en relief des cylindres encreurs 7 sont rassemblés sur le cylindre collecteur- encreur 6 puis sont transférés depuis ce cylindre collecteur 6 sur le cylindre porte-plaque 2. Une telle machine d'impression rotative est connue du brevet US 5,282,417 par exemple, incorporé par référence dans la présente demande.The printing machine shown in Figure 1 is a convertible intaglio printing machine which allows the use of a direct or indirect inking process. This machine comprises three modules I, II and III, direct inking being carried out in module I which comprises a printing cylinder 1, a plate cylinder 2, a wiping cylinder 3 and an ink cylinder 4 associated with an inkwell 5. The indirect inking is carried out by the modules II and III, which comprise a collector-inking cylinder 6 inked by inking cylinders 7 located in the module II associated with the inkwells 8. Thus, for the indirect inking, the patterns corresponding to the raised areas of the inking cylinders 7 are collected on the collector-inking cylinder 6 and are then transferred from this collector cylinder 6 to the plate cylinder 2. Such a rotary printing machine is known from US Patent 5,282,417 for example, incorporated by reference in the present application.
Une plaque d'encrage selon l'invention est représentée en coupe à la figure 2. Cette plaque d'encrage 10 est constituée d'une plaque de base 11, de préférence en métal par exemple en inox, ayant deux extrémités 12, 13 prévues pour sa fixation sur un cylindre 20 (voir figure 3) . Sur la plaque de base 11, on a d'abord déposé une couche de colle 14 qui recouvre la surface de la plaque 11 a l'exception des deux extrémités 12, 13 servant à la fixation. Par dessus cette couche de colle 14, on a ensuite déposé une première couche 26 d'une première composition de PVC et par dessus cette première couche 26, on dépose une deuxième couche 15 d'une deuxième composition de PVC dans laquelle des reliefs 16 ont été taillés. Ces reliefs 16 correspondent exactement à des motifs de la plaque qui doivent être encrés dans une couleur déterminée.An inking plate according to the invention is shown in section in FIG. 2. This inking plate 10 consists of a base plate 11, preferably made of metal, for example stainless steel, having two ends 12, 13 provided for its attachment to a cylinder 20 (see Figure 3). On the base plate 11, a layer of adhesive 14 was first deposited which covers the surface of the plate 11 with the exception of the two ends 12, 13 used for fixing. Over this layer of glue 14, a first layer 26 of a first PVC composition was then deposited and over this first layer 26, a second layer 15 of a second PVC composition was deposited in which reliefs 16 have been trimmed. These reliefs 16 correspond exactly to patterns on the plate which must be inked in a specific color.
De préférence, cette plaque à deux couches de PVC est utilisée pour de l'encrage direct, la deuxième couche 15 étant plus molle que la première couche 26 de PVC.Preferably, this plate with two layers of PVC is used for direct inking, the second layer 15 being softer than the first layer 26 of PVC.
La figure 3 illustre, de manière schématique, la plaque d'encrage 10 montée sur un cylindre d'encrage 17. La plaque 10, qui correspond à celle de la figure 2, comprend la plaque de base 11, la couche de colle 14, les deux couches 26 et 15 de PVC, des reliefs 16 ayant été taillés dans la couche 15. Les extrémités 12 et 13 de la plaque de base 11 sont maintenues dans une fosse 18 du cylindre 17 par un système de fixation approprié, par exemple des pinces (non-représentées) . Le système de fixation de plaques sur un cylindre est connu dans le domaine des machines d'impression rotatives. A titre d'exemple, le brevet EP 0 403 434, qui est incorporé par référence à la présente demande, montre un tel système de fixation se montant dans la fosse d'un cylindre porte-plaque.FIG. 3 schematically illustrates the inking plate 10 mounted on an inking cylinder 17. The plate 10, which corresponds to that of FIG. 2, comprises the base plate 11, the layer of adhesive 14, the two layers 26 and 15 of PVC, reliefs 16 having been cut in the layer 15. The ends 12 and 13 of the base plate 11 are held in a pit 18 of the cylinder 17 by an appropriate fixing system, for example pliers (not shown). The system for fixing plates to a cylinder is known in the field of rotary printing machines. By way of example, patent EP 0 403 434, which is incorporated by reference into the present application, shows such a fixing system being mounted in the pit of a plate cylinder.
Un tel cylindre 17 d'encrage se monte ensuite dans une machine d'impression telle que représentée à la figure 1, de préférence à la place du cylindre 4 pour de l'encrage direct, comme indiqué ci -dessus.Such an inking cylinder 17 is then mounted in a printing machine as shown in FIG. 1, preferably in place of the cylinder 4 for direct inking, as indicated above.
La figure 4 montre une plaque d'encrage en préparation, montée sur un cylindre de préparation 20 approprié pour la dépose des couches successives, ledit cylindre étant monté sur un support 22. La plaque de base 11 est montée sur ce cylindre de préparation 20 et maintenue en position par un système de pinces, représenté schématiquement par la référence 23, situé dans la fosse 21 dudit cylindre 20. Le système de pince utilisé peut être celui décrit ci-dessus ou tout autre système équivalent. Ladite fosse 21 est ensuite fermée par un couvercle 24 pour empêcher la colle et le PVC d'y pénétrer. Le couvercle 24 est fixé par des vis 25 ou par d'autres moyens équivalents. On dépose la couche de colle 14 sur la surface de la plaque de base 11 sauf sur la surface du couvercle 24. Dans le cas représenté dans cette figure, on a déposé qu'une seule et unique couche de PVC 27: cette configuration de plaque correspond à une utilisation dans un procédé d'encrage indirect. Dans ce cas, la couche externe de PVC 27 est plus dure que la couche 15 des figures 2 et 3 , pour des plaques utilisées dans un procédé d'encrage direct. L'absence de colle sur le couvercle 24 fait que la couche de PVC n'adhère pas sur celui-ci et pour retirer la plaque 10, il suffit de découper longitudinalement , dans le sens axial du cylindre 20,' le PVC le long des bords du couvercle pour enlever les couches de PVC recouvrant ledit couvercle 24. L'on peut ensuite défaire les moyens de fixation du couvercle 24 et accéder aux moyens de fixation 23 de la plaque 10 sur le cylindre 20 et enlever la plaque 10.FIG. 4 shows an inking plate in preparation, mounted on a preparation cylinder 20 suitable for depositing successive layers, said cylinder being mounted on a support 22. The base plate 11 is mounted on this preparation cylinder 20 and held in position by a clamp system, represented schematically by the reference 23, located in the pit 21 of said cylinder 20. The clamp system used can be that described above or any other equivalent system. Said pit 21 is then closed by a cover 24 to prevent the glue and the PVC from entering it. The cover 24 is fixed by screws 25 or by other equivalent means. The adhesive layer 14 is deposited on the surface of the base plate 11 except on the surface of the cover 24. In the case shown in this figure, only one single layer of PVC 27 has been deposited: this configuration of plate corresponds to use in an indirect inking process. In this case, the outer layer of PVC 27 is harder than the layer 15 of Figures 2 and 3, for plates used in a direct inking process. The absence of glue on the cover 24 means that the PVC layer does not adhere to it and to remove the plate 10, it suffices to cut longitudinally, in the axial direction of the cylinder 20, ' the PVC along the edges of the cover to remove the layers of PVC covering said cover 24. The fixing means of the cover 24 can then be undone and access the fixing means 23 of the plate 10 on the cylinder 20 and remove the plate 10.
Il est possible de procéder à la découpe des reliefs 16 (voir figure 2 et 3) soit directement sur le cylindre de préparation 20, ou bien dans une machine spécifique en démontant la plaque 10 de son support 20 et en la remontant sur un cylindre similaire dans la machine spécifique .It is possible to cut the reliefs 16 (see FIGS. 2 and 3) either directly on the preparation cylinder 20, or in a specific machine by removing the plate 10 from its support 20 and reassembling it on a similar cylinder. in the specific machine.
Le procédé de production d'une plaque d'encrage selon l'invention comprend les étapes suivantes: montage d'une plaque de base sur un cylindre de préparation et fixation par des moyens appropriés;The method for producing an inking plate according to the invention comprises the following steps: mounting a base plate on a preparation cylinder and fixing by appropriate means;
- couverture des moyens de fixation par un couvercle;- cover of the fixing means by a cover;
- dépôt d'une couche de colle sur la surface de la plaque de base sauf sur le couvercle;- deposit of a layer of glue on the surface of the base plate except on the cover;
- dépôt d'au moins une couche de PVC sur la couche de colle et sur le couvercle;- deposit of at least one layer of PVC on the adhesive layer and on the cover;
- découpe de la couche de PVC située sur le couvercle;- cutting of the PVC layer located on the cover;
- démontage du couvercle et retrait de la plaque.- dismantling of the cover and removal of the plate.
Ce procédé est illustré en figure 5 par un schéma-bloc comportant les différentes étapes. De préférence, on utilisera une colle du type Decorral HF (nom de commerce), toutefois d'autres colles équivalentes sont possibles.This process is illustrated in FIG. 5 by a block diagram comprising the different steps. Preferably, an adhesive of the Decorral HF type (trade name) will be used, however other equivalent adhesives are possible.
Des exemples de compositions de PVC sont les suivants.Examples of PVC compositions are as follows.
Couche 15 , 70 Shore A, des figures 2 et 3 :Layer 15, 70 Shore A, Figures 2 and 3:
- Hostalit 4472 l'IOO g- Hostalit 4472 IOO g
- Hostalit 9070 l'IOO g - Vestinol AH (DOP) l'135 g- Hostalit 9070 IOO g - Vestinol AH (DOP) 135 g
- Paraplex G54 770 g- Paraplex G54 770 g
- Carbonate de calcium 825 g- Calcium carbonate 825 g
- Prosper DBM 45 g- Prosper DBM 45 g
- Vinlub 73 10 g - Riccadil TPL 10 g- Vinlub 73 10 g - Riccadil TPL 10 g
Couches 26 ou 27, 50 Shore D, des figures 2, 3 ou 4 :Layers 26 or 27, 50 Shore D, Figures 2, 3 or 4:
- Hostalit 4472 l'250 g- Hostalit 4472 the 250 g
- Hostalit 9070 l'250 g - Vestinol AH (DOP) l'200 g- Hostalit 9070 the 250 g - Vestinol AH (DOP) the 200 g
- Monomer X 980 375 g- Monomer X 980 375 g
- Catalyseur TBPB-50-FT (50%) 8cc- TBPB-50-FT catalyst (50%) 8cc
- Prosper DBM 50 g- Prosper DBM 50 g
- Carbonate de calcium 125 g - Graphite 40 g- Calcium carbonate 125 g - Graphite 40 g
De préférence, l'épaisseur appliquée de la couche 15 de PVC sera de 5 mm dont le dépôt peut s'effectuer en deux phases consécutives, chacune correspondant à une épaisseur de 2,5 mm environ. Une fois cette couche déposée et le cylindre refroidi, on peut rectifier la surface avant le dépôt de la deuxième couche de PVC. L'épaisseur de la couche 26 ou 27 peut être de 3 mm environ.Preferably, the applied thickness of the layer of PVC will be 5 mm, the deposition of which can be carried out in two consecutive phases, each corresponding to a thickness of approximately 2.5 mm. Once this layer has been deposited and the cylinder has cooled, the surface can be rectified before the second layer of PVC is deposited. The thickness of the layer 26 or 27 can be approximately 3 mm.
Les modes d'exécution de l'invention sont donnés à titre d'exemple et des variations dans le cadre de la protection revendiquées sont possibles. Par exemple, en fonction de la taille des plaques et de la dimension des cylindres encreurs, l'on peut monter plus d'une plaque par cylindre. Il peut même être particulièrement intéressant et avantageux de faire correspondre le nombre de plaques d'encrage avec le nombre de plaque à encrer: toutes les plaques étant fixées à l'aide de systèmes de pinces, l'on peut alors faire correspondre les passages des pinces de chaque cylindre, encreur et porte-plaque, et ainsi optimiser l'utilisation des surfaces des plaques. De même, l'épaisseur des couches de PVC peut être variée en fonction des circonstances. The embodiments of the invention are given by way of example and variations within the scope of the protection claimed are possible. For example, depending on the size of the plates and the size of the ink cylinders, more than one plate can be mounted per cylinder. It may even be particularly interesting and advantageous to match the number of inking plates with the number of plates to be inked: all the plates being fixed using clamp systems, it is then possible to match the passages of the clamps of each cylinder, ink pad and plate holder, and thus optimize the use of the plate surfaces. Likewise, the thickness of the PVC layers can be varied depending on the circumstances.

Claims

Revendications claims
1. Plaque d'encrage pour machine d'impression rotative, destinée à être montée sur un cylindre, formée au moins d'une plaque de base (11) et de 'matière déposée sur ladite plaque de base (11) , la surface de ladite matière déposée étant destinée à être découpée en zones en relief (16) dont les contours correspondent à ceux des surfaces à encrer, caractérisée en ce que ladite matière déposée est formée par au moins une couche (15; 27) d'une composition de PVC répartie sur la majeure partie de la surface de la plaque de base (11) .1. inking plate for a rotary printing machine, intended to be mounted on a cylinder, formed at least of a base plate (11) and 'material deposited on said base plate (11), the surface of said deposited material being intended to be cut into raised zones (16) whose contours correspond to those of the surfaces to be inked, characterized in that said deposited material is formed by at least one layer (15; 27) of a composition of PVC distributed over most of the surface of the base plate (11).
2. Plaque selon la revendication 1, caractérisée en ce qu'elle comporte une couche de colle (14) déposée directement sur la surface de la plaque de base (11)2. Plate according to claim 1, characterized in that it comprises a layer of adhesive (14) deposited directly on the surface of the base plate (11)
3. Plaque selon la revendication 1 ou 2 , caractérisée en ce que la couche de PVC (27) a une dureté de 50 Shore D.3. Plate according to claim 1 or 2, characterized in that the PVC layer (27) has a hardness of 50 Shore D.
4. Plaque selon la revendication 1 ou 2 , caractérisée en ce que la matière déposée comprend deux couches successives (15,26) de deux compositions de PVC différentes.4. Plate according to claim 1 or 2, characterized in that the deposited material comprises two successive layers (15, 26) of two different PVC compositions.
5. Plaque selon la revendication 4, caractérisée en ce que la première couche (26) de PVC déposée a une dureté de 50 Shore D et la deuxième couche (15) de PVC une dureté de 70 Shore A. 5. Plate according to claim 4, characterized in that the first layer (26) of deposited PVC has a hardness of 50 Shore D and the second layer (15) of PVC a hardness of 70 Shore A.
6. Plaque selon l'une des revendications 1 à 5, caractérisée en ce que la plaque de base est une plaque métallique.6. Plate according to one of claims 1 to 5, characterized in that the base plate is a metal plate.
7. Cylindre encreur pour machine d'impression rotative, formé d'un cylindre (17) comportant au moins une fosse (18) et des moyens pour fixer au moins une plaque d'encrage sur sa circonférence, caractérisé en ce qu'il comporte une plaque d'encrage (10) telle que définie dans l'une des revendications 1 à 6.7. Inking cylinder for rotary printing machine, formed of a cylinder (17) comprising at least one pit (18) and means for fixing at least one inking plate on its circumference, characterized in that it comprises an inking plate (10) as defined in one of claims 1 to 6.
8. Machine d'impression rotative, caractérisée en ce qu'elle comprend au moins un cylindre encreur (17) selon la revendication 7.8. Rotary printing machine, characterized in that it comprises at least one ink cylinder (17) according to claim 7.
9. Procédé de production d'une plaque d'encrage elle que définie dans l'une des revendications 1 à 6, caractérisé par les étapes suivantes: montage d'une plaque de base sur un cylindre de préparation et fixation par des moyens appropriés;9. A method of producing an inking plate as defined in one of claims 1 to 6, characterized by the following steps: mounting a base plate on a preparation cylinder and fixing by appropriate means;
- couverture des moyens de fixation par un couvercle;- cover of the fixing means by a cover;
- dépôt d'une couche de colle sur la surface de la plaque de base sauf sur le couvercle;- deposit of a layer of glue on the surface of the base plate except on the cover;
- dépôt d'au moins une couche d'une composition de PVC sur la couche de colle et sur le couvercle;- depositing at least one layer of a PVC composition on the adhesive layer and on the cover;
- découpe de la couche de PVC située sur le couvercle;- cutting of the PVC layer located on the cover;
- démontage du couvercle et retrait de la plaque.- dismantling of the cover and removal of the plate.
10. Procédé selon la revendication 9, caractérisé en ce que on dépose deux couches successives de deux compositions différentes de PVC. 10. Method according to claim 9, characterized in that two successive layers of two different PVC compositions are deposited.
11. Procédé selon la revendication 9 ou 10, caractérisé en ce que l'on taille des reliefs correspondants aux zones à encrer dans la couche de PVC. 11. The method of claim 9 or 10, characterized in that the reliefs corresponding to the areas to be inked in the PVC layer are carved.
EP00960283A 1999-11-19 2000-09-28 Inking plate for rotary printing machine and process of production of an inking plate Expired - Lifetime EP1230089B8 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH211799 1999-11-19
CH211799 1999-11-19
PCT/CH2000/000529 WO2001038096A1 (en) 1999-11-19 2000-09-28 Inking plate for rotary printing machine

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EP1230089A1 true EP1230089A1 (en) 2002-08-14
EP1230089B1 EP1230089B1 (en) 2003-07-23
EP1230089B8 EP1230089B8 (en) 2003-09-17

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JP (1) JP2003514698A (en)
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CA2391949A1 (en) 2001-05-31
US6766741B1 (en) 2004-07-27
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AU764396B2 (en) 2003-08-14
CN1391518A (en) 2003-01-15
UA70396C2 (en) 2004-10-15
JP2003514698A (en) 2003-04-22
EP1230089B8 (en) 2003-09-17
EP1230089B1 (en) 2003-07-23
WO2001038096A1 (en) 2001-05-31
ATE245537T1 (en) 2003-08-15
AU7266400A (en) 2001-06-04
CN1173828C (en) 2004-11-03
US20040177781A1 (en) 2004-09-16
DE60004084T2 (en) 2004-06-17
RU2240922C2 (en) 2004-11-27
DE60004084D1 (en) 2003-08-28

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