EP2821227A1 - Device for mounting a printing form on a flexographic printing cylinder - Google Patents

Device for mounting a printing form on a flexographic printing cylinder Download PDF

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Publication number
EP2821227A1
EP2821227A1 EP13305944.4A EP13305944A EP2821227A1 EP 2821227 A1 EP2821227 A1 EP 2821227A1 EP 13305944 A EP13305944 A EP 13305944A EP 2821227 A1 EP2821227 A1 EP 2821227A1
Authority
EP
European Patent Office
Prior art keywords
plate
compressible material
cylinder
mounting
end edge
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
EP13305944.4A
Other languages
German (de)
French (fr)
Other versions
EP2821227B1 (en
Inventor
Bernard Ladrat
Hubert Sampre
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.)
MILLER GRAPHICS FRANCE Sas
Original Assignee
MILLER GRAPHICS FRANCE Sas
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Publication date
Application filed by MILLER GRAPHICS FRANCE Sas filed Critical MILLER GRAPHICS FRANCE Sas
Priority to EP13305944.4A priority Critical patent/EP2821227B1/en
Publication of EP2821227A1 publication Critical patent/EP2821227A1/en
Application granted granted Critical
Publication of EP2821227B1 publication Critical patent/EP2821227B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/12—Devices for attaching printing elements or formes to supports for attaching flexible printing formes
    • B41F27/1206—Feeding to or removing from the forme cylinder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/12—Devices for attaching printing elements or formes to supports for attaching flexible printing formes
    • B41F27/1218—Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/12—Devices for attaching printing elements or formes to supports for attaching flexible printing formes
    • B41F27/1262—Devices for attaching printing elements or formes to supports for attaching flexible printing formes without tensioning means
    • B41F27/1268—Devices for attaching printing elements or formes to supports for attaching flexible printing formes without tensioning means by self-locking or snap-on means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/14—Devices for attaching printing elements or formes to supports for attaching printing formes to intermediate supports, e.g. adapter members
    • 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
    • B41N6/00—Mounting boards; Sleeves Make-ready devices, e.g. underlays, overlays; Attaching by chemical means, e.g. vulcanising
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2200/00—Printing processes
    • B41P2200/10—Relief printing
    • B41P2200/12—Flexographic printing

Definitions

  • the present invention relates to the field of flexographic printing and more particularly relates to the improved mounting of a plate on a platen printing cylinder.
  • Flexography is a well-known printing process and is generally used in the high-speed printing of various media including cardboard, paper, plastic, ...
  • Flexography finds a particularly advantageous application for printing corrugated cardboard.
  • a flexographic printing device uses a plate which is intended to be wound on a platen roller of a flexographic printing unit.
  • Such printing unit further comprises, in particular, an inking unit which cooperates with the forme cylinder to deposit ink on the printer form, which is then transferred to a final print medium.
  • the plate is associated with a plate of compressible material, for example a foam plate, which is intended to provide vibration isolation and to improve the print quality at a high printing rate.
  • a plate of compressible material for example a foam plate
  • the assembly formed by the plate associated with the compressible material plate constitutes a printer form.
  • the current trend is the relatively large reduction in the thickness of the shot.
  • the foam layer is thus used to compensate for this reduction in thickness.
  • the object of the invention is therefore to overcome this drawback and drastically reduce the foam consumption, while maintaining easy mounting of the plate and the compressible material plate on the printing cylinder.
  • the invention therefore relates to a device for mounting a plate on a flexographic printing cylinder, comprising a plate of compressible material provided with means for mounting the plate on the cylinder.
  • the compressible material plate constitutes a separate and separable element of the plate, the plate and the plate of compressible material comprising removable assembly means.
  • the plate of compressible material can thus be used to implement prints by means of other pictures.
  • the mounting step of the plate and the plate of compressible material is furthermore easy to implement.
  • said plate comprises a curved end edge hooking the plate on the printing cylinder and in which engages a corresponding end edge of the compressible material plate.
  • the curved end edge of the support plate may have a U- shaped profile.
  • the end edge of the support plate is constituted by a rod attached to the support plate.
  • the end edge of the compressible material plate has a U- shaped profile complementary to that of the end edge of the support plate.
  • the end edge of the compressible material plate may also be constituted by a rod fixed on the compressible material plate.
  • the support plate is advantageously made of polyester.
  • the plate has a thickness of 2.84 mm. It may have other thicknesses between 1.7 and 4.3 mm.
  • said support plate comprises complementary means for mounting the plate on the printing cylinder provided opposite the curved end edge.
  • these complementary mounting means comprise a set of eyelets made in the compressible material plate and intended to cooperate with pins provided on the cylinder by means of tensioners.
  • said complementary mounting means comprise a rod fixed to the plate of compressible material.
  • FIG 1 schematically shows a portion of a flexographic printing unit and, in particular, the impression cylinder C, also known as the forme cylinder, on which a printer form 1 and a plate are wound. of compressible material 2.
  • the printer form essentially comprises a support plate 3, for example made of polyester, in particular Mylar ® and on which is glued a plate 4.
  • the plate 4 is made of etched photopolymer. It is intended to be inked to transfer the ink on a final printing medium, in this case, in the embodiment of the corrugated board.
  • the dimensions of the support plate 3 are of course chosen according to those of the plate 4. It has for example a square or rectangular general shape appropriate to the dimensions of the plate cylinder C.
  • the plate of compressible material 2 comprises, in turn, a foam layer 5 bonded to a support plate 6, for example also made of polyester.
  • the foam layer is adhered to the plate 6, on the side facing the plate 1.
  • the foam layer 5 is intended to absorb vibration, especially at high printing speed and to obtain a good print quality. It is also advantageous when it comes to printing on irregular substrates. It also serves to compensate the reduction in thickness of the plate, here equal to 2.84 mm.
  • the plate may also have other thicknesses between 1.7 and 4.3 mm.
  • the support plate 6 of the foam 5 has a shape similar to that of the support plate 3 of the plate. It comprises, in particular, an identical transverse dimension so as to be able to extend along the entire width of the plate 1. However, as will be described in detail later, it is intended to be wound around the forme cylinder. by being interposed between the cylinder C and the printer form 1. It therefore has a length sufficiently shorter than that of the support plate 3 so that, after winding of the printer form 1 and the plate 2 of compressible material, the two plates coincide.
  • one of the ends of the support plate 3, and in particular one of the lateral edges 3a, is curved. It comprises for this purpose a U- shaped insert-shaped rod 7 which extends over the width of the support plate 3. This end 3a thus forms a groove 8 into which a corresponding end of the plate 2 is inserted. of compressible material.
  • the profiled strip 7, which is for example glued, sewn or riveted on the support plate 3, is oriented so that the groove extends on one side of the plate 3 opposite the printer form 4.
  • the plate 2 of compressible material adopts a similar shape. It has indeed an end 2a which is intended to engage in the groove 8, also curved. This end 2a is in fact provided with a rod 9 in the form of U- shaped profile whose dimensions correspond to those of the groove 8 so as to be easily inserted while limiting the games.
  • the rod 9 is also, for example, glued, sewn or riveted on the plate 6 supporting the foam 5 and extends on the opposite side to the foam 5.
  • This groove 10 comprises a lateral rib 11 for example uninterrupted, which extends along the entire width of the groove and, on the other side, the same lateral rib 12.
  • the printer form can be mounted on the printing cylinder by providing the end 2b of the compressible material plate with a U -shaped strip 13 of a shape similar to that of FIG. rod 9 described above and intended to cooperate with a lateral rib 14 provided in the groove 10.
  • This rod 13 is also, for example glued, sewn or riveted on the plate 6 supporting the foam 5 and extends on the opposite side to the foam 5. Note however that this rod is here fixed on the plate via a zone 15 elastically deformable to allow the disassembly of the printer form.
  • the invention which has just been described, which uses a plate of removable compressible material, can be assembled and used to carry out different flexographic prints by means of several printing forms. Consumption of foam, which is a relatively expensive material, is therefore solely related to its wear and is therefore independent of the use of printing forms.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Printing Plates And Materials Therefor (AREA)

Abstract

Ce dispositif de montage d'un cliché sur un cylindre d'impression par flexographie comprenant une plaque (2) de matériau compressible dotée de moyens de montage de la plaque sur le cylindre. La plaque de matériau compressible constitue un élément distinct et séparable du cliché (4), le cliché et la plaque de matériau compressible comprenant des moyens (7, 9) d'assemblage amovibles.This device for mounting a plate on a flexographic printing cylinder comprising a plate (2) of compressible material provided with means for mounting the plate on the cylinder. The compressible material plate is a separate and separable element of the plate (4), the plate and the compressible material plate comprising removable assembly means (7, 9).

Description

La présente invention se rapporte au domaine de l'impression par flexographie et concerne plus particulièrement le montage amélioré d'un cliché sur un cylindre d'impression porte-cliché.The present invention relates to the field of flexographic printing and more particularly relates to the improved mounting of a plate on a platen printing cylinder.

La flexographie est un procédé d'impression bien connu et est généralement utilisée dans l'impression à cadence élevée de divers supports notamment en carton, en papier, en matière plastique, ...Flexography is a well-known printing process and is generally used in the high-speed printing of various media including cardboard, paper, plastic, ...

La flexographie trouve toutefois une application particulièrement avantageuse pour l'impression de carton ondulé.Flexography, however, finds a particularly advantageous application for printing corrugated cardboard.

Un dispositif d'impression par flexographie met en oeuvre un cliché qui est destiné à venir s'enrouler sur un cylindre porte-cliché d'un groupe d'impression flexographique.A flexographic printing device uses a plate which is intended to be wound on a platen roller of a flexographic printing unit.

Un tel groupe d'impression comporte en outre, notamment, une unité d'encrage qui coopère avec le cylindre porte-cliché pour déposer de l'encre sur la forme imprimante, laquelle est ensuite transférée sur un support d'impression finale.Such printing unit further comprises, in particular, an inking unit which cooperates with the forme cylinder to deposit ink on the printer form, which is then transferred to a final print medium.

Dans l'état de la technique, le cliché est associé à une plaque de matériau compressible, par exemple une plaque de mousse, qui est destinée à assurer une isolation contre les vibrations et à améliorer la qualité d'impression à cadence d'impression élevée. L'ensemble formé par le cliché associé à la plaque de matériau compressible constitue une forme imprimante.In the state of the art, the plate is associated with a plate of compressible material, for example a foam plate, which is intended to provide vibration isolation and to improve the print quality at a high printing rate. . The assembly formed by the plate associated with the compressible material plate constitutes a printer form.

On pourra à cet égard se référer aux documents EP-A-0 206 760 ; EP-A-0 177 302 et WO 2006/135465 qui décrivent de tels dispositifs d'impression dans lesquels une plaque de matériau compressible est solidarisée au cliché, sur sa face opposée à la forme imprimante.In this regard, reference may be made to the documents EP-A-0 206 760 ; EP-A-0 177 302 and WO 2006/135465 which describe such printing devices in which a compressible material plate is secured to the plate, on its face opposite to the printer form.

La tendance actuelle est la réduction relativement importante de l'épaisseur du cliché. La couche de mousse est ainsi utilisée pour compenser cette réduction d'épaisseur.The current trend is the relatively large reduction in the thickness of the shot. The foam layer is thus used to compensate for this reduction in thickness.

Il a été constaté que la mousse, qui est collée sur chaque cliché, est relativement onéreuse. Dans la mesure où elle est collée sur le cliché, les imprimeurs doivent utiliser une couche de mousse pour chaque commande d'impression émanant de leurs clients.It has been found that the foam, which is stuck on each shot, is relatively expensive. Insofar as it is stuck on the plate, printers must use a layer of foam for each print order from their customers.

Il s'ensuit une consommation de mousse relativement importante.It follows a relatively large consumption of foam.

Le but de l'invention est donc de pallier cet inconvénient et de réduire de manière drastique la consommation en mousse, tout en conservant un montage aisé du cliché et de la plaque de matériau compressible sur le cylindre d'impression.The object of the invention is therefore to overcome this drawback and drastically reduce the foam consumption, while maintaining easy mounting of the plate and the compressible material plate on the printing cylinder.

L'invention a donc pour objet un dispositif de montage d'un cliché sur un cylindre d'impression par flexographie, comprenant une plaque de matériau compressible dotée de moyens de montage de la plaque sur le cylindre.The invention therefore relates to a device for mounting a plate on a flexographic printing cylinder, comprising a plate of compressible material provided with means for mounting the plate on the cylinder.

La plaque de matériau compressible constitue un élément distinct et séparable du cliché, le cliché et la plaque de matériau compressible comprenant des moyens d'assemblage amovibles.The compressible material plate constitutes a separate and separable element of the plate, the plate and the plate of compressible material comprising removable assembly means.

Il est ainsi possible d'assurer un assemblage du cliché et de la plaque de matériau compressible pour ensuite enrouler l'ensemble sur le cylindre porte-cliché. La plaque de matériau compressible peut ainsi être utilisée pour mettre en oeuvre des impressions au moyen d'autres clichés. L'étape de montage du cliché et de la plaque de matériau compressible reste en outre aisée à mettre en oeuvre.It is thus possible to ensure an assembly of the plate and the compressible material plate and then wind the assembly on the forme cylinder. The plate of compressible material can thus be used to implement prints by means of other pictures. The mounting step of the plate and the plate of compressible material is furthermore easy to implement.

Selon une autre caractéristique de l'invention, ladite plaque comporte un bord d'extrémité recourbé d'accrochage du cliché sur le cylindre d'impression et dans lequel s'engage un bord d'extrémité correspondant de la plaque de matériau compressible.According to another characteristic of the invention, said plate comprises a curved end edge hooking the plate on the printing cylinder and in which engages a corresponding end edge of the compressible material plate.

Dans ce cas, le bord d'extrémité recourbé de la plaque de support peut avoir une forme de profilé en U.In this case, the curved end edge of the support plate may have a U- shaped profile.

Dans un mode de réalisation, le bord d'extrémité de la plaque de support est constitué par une baguette fixée sur la plaque de support.In one embodiment, the end edge of the support plate is constituted by a rod attached to the support plate.

Avantageusement, le bord d'extrémité de la plaque de matériau compressible a une forme de profilé en U complémentaire de celle du bord d'extrémité de la plaque de support.Advantageously, the end edge of the compressible material plate has a U- shaped profile complementary to that of the end edge of the support plate.

Le bord d'extrémité de la plaque de matériau compressible peut également être constitué par une baguette fixée sur la plaque de matériau compressible.The end edge of the compressible material plate may also be constituted by a rod fixed on the compressible material plate.

On notera que la plaque de support est avantageusement réalisée en polyester.It will be noted that the support plate is advantageously made of polyester.

Dans un mode de mise en oeuvre, le cliché a une épaisseur de 2,84 mm. Il peut avoir d'autres épaisseurs comprises entre 1,7 et 4,3 mm.In one embodiment, the plate has a thickness of 2.84 mm. It may have other thicknesses between 1.7 and 4.3 mm.

Selon encore une autre caractéristique de l'invention, ladite plaque de support comporte des moyens complémentaires de montage de la plaque sur le cylindre d'impression prévus à l'opposé du bord d'extrémité recourbé.According to yet another characteristic of the invention, said support plate comprises complementary means for mounting the plate on the printing cylinder provided opposite the curved end edge.

Par exemple, ces moyens complémentaires de montage comportent un ensemble d'oeillets pratiqués dans la plaque de matériau compressible et destinés à coopérer avec des pions prévus sur le cylindre par l'intermédiaire de tendeurs.For example, these complementary mounting means comprise a set of eyelets made in the compressible material plate and intended to cooperate with pins provided on the cylinder by means of tensioners.

En variante, lesdits moyens complémentaires de montage comportent une baguette fixée sur la plaque de matériau compressible.In a variant, said complementary mounting means comprise a rod fixed to the plate of compressible material.

D'autres buts, caractéristiques et avantages de l'invention apparaîtront à la lecture de la description suivante, donnée uniquement à titre d'exemple non limitatif et faite en référence aux dessins annexés sur lesquels :

  • la figure 1 est une vue schématique en coupe transversale d'un dispositif d'impression comprenant une forme imprimante venant se monter sur un cylindre d'impression au moyen d'un dispositif de montage conforme à l'invention, avant assemblage du cliché et de la plaque de matériau compressible ;
  • la figure 2 montre le dispositif d'impression de la figure 1, après montage du cliché et de la plaque de matériau compressible sur le cylindre d'impression ;
  • la figure 3 illustre un autre exemple de réalisation d'un dispositif de montage d'un cliché sur un cylindre d'impression conforme à l'invention.
Other objects, features and advantages of the invention will become apparent on reading the following description, given solely by way of nonlimiting example and with reference to the appended drawings in which:
  • the figure 1 is a schematic cross-sectional view of a printing device comprising a printer form to be mounted on a printing cylinder by means of a mounting device according to the invention, before assembly of the plate and the plate of compressible material;
  • the figure 2 shows the printing device of the figure 1 , after mounting the plate and the plate of compressible material on the printing cylinder;
  • the figure 3 illustrates another embodiment of a device for mounting a plate on a printing cylinder according to the invention.

Sur la figure 1, on a représenté schématiquement une portion d'un groupe d'impression flexographique et, notamment, le cylindre d'impression C, également connu sous le terme de cylindre porte-cliché, sur lequel viennent s'enrouler une forme imprimante 1 et une plaque de matériau compressible 2.On the figure 1 schematically shows a portion of a flexographic printing unit and, in particular, the impression cylinder C, also known as the forme cylinder, on which a printer form 1 and a plate are wound. of compressible material 2.

Comme on le voit sur cette figure 1, la forme imprimante comporte essentiellement une plaque support 3, par exemple réalisée en polyester, notamment en Mylar® et sur laquelle est collé un cliché 4.As we see on this figure 1 , the printer form essentially comprises a support plate 3, for example made of polyester, in particular Mylar ® and on which is glued a plate 4.

Comme cela est classique, le cliché 4 est réalisée en photopolymère gravé. Il est destiné à être encré pour transférer l'encre sur un support d'impression finale, en l'espèce, dans le mode de mise en oeuvre envisagé, du carton ondulé.As is conventional, the plate 4 is made of etched photopolymer. It is intended to be inked to transfer the ink on a final printing medium, in this case, in the embodiment of the corrugated board.

Les dimensions de la plaque de support 3 sont bien entendu choisies en fonction de celles du cliché 4. Elle a par exemple une forme générale carrée ou rectangulaire appropriée aux dimensions du cylindre porte-cliché C.The dimensions of the support plate 3 are of course chosen according to those of the plate 4. It has for example a square or rectangular general shape appropriate to the dimensions of the plate cylinder C.

La plaque de matériau compressible 2 comporte, quant à elle, une couche de mousse 5 collée sur une plaque 6 de support, par exemple également réalisée en polyester. La couche de mousse est collée sur la plaque 6, du côté tourné vers le cliché 1.The plate of compressible material 2 comprises, in turn, a foam layer 5 bonded to a support plate 6, for example also made of polyester. The foam layer is adhered to the plate 6, on the side facing the plate 1.

Comme indiqué précédemment, la couche de mousse 5 est destinée à absorber les vibrations, en particulier à grande vitesse d'impression et à permettre d'obtenir une bonne qualité d'impression. Elle est également avantageuse lorsqu'il s'agit de procéder à une impression sur des substrats irréguliers. Elle sert également à compenser la réduction d'épaisseur du cliché, ici égale à 2,84 mm. Le cliché peut également avoir d'autres épaisseurs comprises entre 1,7 et 4,3 mm.As indicated above, the foam layer 5 is intended to absorb vibration, especially at high printing speed and to obtain a good print quality. It is also advantageous when it comes to printing on irregular substrates. It also serves to compensate the reduction in thickness of the plate, here equal to 2.84 mm. The The plate may also have other thicknesses between 1.7 and 4.3 mm.

La plaque de support 6 de la mousse 5 présente une forme similaire à celle de la plaque de support 3 du cliché. Elle comporte, en particulier, une dimension transversale identique de manière à pouvoir s'étendre selon toute la largeur du cliché 1. Toutefois, comme cela sera décrit en détail par la suite, elle est destinée à s'enrouler autour du cylindre porte-cliché, en étant intercalée entre le cylindre C et la forme imprimante 1. Elle présente dès lors une longueur suffisamment inférieure à celle de la plaque de support 3 de sorte que, après enroulement de la forme imprimante 1 et de la plaque 2 de matériau compressible, les deux plaques coïncident.The support plate 6 of the foam 5 has a shape similar to that of the support plate 3 of the plate. It comprises, in particular, an identical transverse dimension so as to be able to extend along the entire width of the plate 1. However, as will be described in detail later, it is intended to be wound around the forme cylinder. by being interposed between the cylinder C and the printer form 1. It therefore has a length sufficiently shorter than that of the support plate 3 so that, after winding of the printer form 1 and the plate 2 of compressible material, the two plates coincide.

On voit également sur la figure 1 que la forme imprimante 1 et la plaque 2 de matériau compressible sont dotés de moyens d'assemblage amovibles.We also see on the figure 1 that the printer form 1 and the plate 2 of compressible material are provided with removable assembly means.

On voit en effet que l'une des extrémités de la plaque de support 3, et en particulier l'un des bords 3a latéral, est recourbée. Elle comporte à cet effet une baguette rapportée 7 en forme de profilé en U qui s'étend sur la largeur de la plaque de support 3. Cette extrémité 3a forme ainsi une gorge 8 dans laquelle vient s'insérer une extrémité correspondante de la plaque 2 de matériau compressible. A cet effet, la baguette profilée 7, qui est par exemple collée, cousue ou rivetée sur la plaque de support 3, est orientée de sorte que la gorge s'étende d'un côté de la plaque 3 opposé à la forme imprimante 4.It can be seen that one of the ends of the support plate 3, and in particular one of the lateral edges 3a, is curved. It comprises for this purpose a U- shaped insert-shaped rod 7 which extends over the width of the support plate 3. This end 3a thus forms a groove 8 into which a corresponding end of the plate 2 is inserted. of compressible material. For this purpose, the profiled strip 7, which is for example glued, sewn or riveted on the support plate 3, is oriented so that the groove extends on one side of the plate 3 opposite the printer form 4.

La plaque 2 de matériau compressible adopte une forme similaire. Elle comporte en effet une extrémité 2a qui est destinée à s'engager dans la gorge 8, également recourbée. Cette extrémité 2a est en effet dotée d'une baguette 9 en forme de profilé en U dont les dimensions correspondent à celles de la gorge 8 afin de pouvoir s'y insérer aisément tout en limitant les jeux. La baguette 9 est également, par exemple, collée, cousue ou rivetée sur la plaque 6 supportant la mousse 5 et s'étend du côté opposé à la mousse 5.The plate 2 of compressible material adopts a similar shape. It has indeed an end 2a which is intended to engage in the groove 8, also curved. This end 2a is in fact provided with a rod 9 in the form of U- shaped profile whose dimensions correspond to those of the groove 8 so as to be easily inserted while limiting the games. The rod 9 is also, for example, glued, sewn or riveted on the plate 6 supporting the foam 5 and extends on the opposite side to the foam 5.

Enfin, en ce qui concerne le cylindre d'impression, celui-ci comporte une gorge 10 transversale, qui s'étend selon toute la largeur du cylindre. Cette gorge 10 comporte une nervure latérale 11 par exemple ininterrompue, qui s'étend selon toute la largeur de la gorge et, de l'autre côté, une même nervure latérale 12.Finally, with regard to the impression cylinder, it has a transverse groove, which extends along the entire width of the cylinder. This groove 10 comprises a lateral rib 11 for example uninterrupted, which extends along the entire width of the groove and, on the other side, the same lateral rib 12.

Pour utiliser le dispositif d'impression qui vient d'être décrit, il convient simplement d'assembler la plaque de matériau compressible 2 et la forme imprimante 1 en insérant la baguette 9 dans le logement 8 délimité par la baguette 7 du cliché 1. Il convient alors simplement d'enrouler l'ensemble autour du cylindre porte-cliché en accrochant la gorge délimitée par la baguette 9 de la plaque 2 de matériau compressible sur la première nervure 11, comme illustré sur la figure 2. On enroule ensuite l'ensemble autour du cylindre C (flèche F) et l'on fixe la forme imprimante 1 et la plaque 2 sur le cylindre en accrochant les extrémités de tendeurs s'insérant dans des oeillets prévus à l'extrémité des plaques 6 et 3 opposée aux baguettes 7 et 9sur la nervure 12 ..En variante, visible sur la figure 3, sur laquelle des éléments identiques aux figures 1 et 2 sont désignés par les mêmes références numériques, la forme imprimante peut être montée sur le cylindre d'impression en dotant l'extrémité 2b de la plaque de matériau compressible d'une baguette 13 en forme de profilé en U de forme similaire à celle de la baguette 9 décrite précédemment et destinée à coopérer avec une nervure latérale 14 prévue dans la gorge 10.To use the printing device which has just been described, it is simply necessary to assemble the compressible material plate 2 and the printer form 1 by inserting the rod 9 in the housing 8 delimited by the rod 7 of the plate 1. It it is then simply necessary to wind the assembly around the forme cylinder by hooking the groove delimited by the strip 9 of the plate 2 of compressible material on the first rib 11, as illustrated in FIG. figure 2 . The assembly is then wrapped around the cylinder C (arrow F) and the printer form 1 and the plate 2 are fixed on the cylinder by hooking the ends of tensioners inserted into the eyelets provided at the end of the plates 6. and 3 opposed to the rods 7 and 9on the rib 12 .. Alternatively, visible on the figure 3 , on which elements identical to Figures 1 and 2 are designated by the same reference numerals, the printer form can be mounted on the printing cylinder by providing the end 2b of the compressible material plate with a U -shaped strip 13 of a shape similar to that of FIG. rod 9 described above and intended to cooperate with a lateral rib 14 provided in the groove 10.

Cette baguette 13 est également, par exemple collée, cousue ou rivetée sur la plaque 6 supportant la mousse 5 et s'étend du côté opposé à la mousse 5. On notera toutefois que cette baguette est ici fixée sur la plaque par l'intermédiaire d'une zone 15 élastiquement déformable afin de permettre le démontage de la forme imprimante.This rod 13 is also, for example glued, sewn or riveted on the plate 6 supporting the foam 5 and extends on the opposite side to the foam 5. Note however that this rod is here fixed on the plate via a zone 15 elastically deformable to allow the disassembly of the printer form.

Comme on le conçoit, l'invention qui vient d'être décrite, qui utilise une plaque de matériau compressible amovible, peut venir se monter et être utilisée pour procéder à différentes impressions flexographiques au moyen de plusieurs formes imprimantes. La consommation en mousse, qui est un matériau relativement onéreux, est dès lors uniquement liée à son usure et est dès lors indépendante de l'utilisation des formes imprimantes.As conceived, the invention which has just been described, which uses a plate of removable compressible material, can be assembled and used to carry out different flexographic prints by means of several printing forms. Consumption of foam, which is a relatively expensive material, is therefore solely related to its wear and is therefore independent of the use of printing forms.

Claims (11)

Dispositif de montage d'un cliché sur un cylindre d'impression par flexographie, comprenant une plaque (2) de matériau compressible dotée de moyens de montage de la plaque sur le cylindre, caractérisé en ce que la plaque de matériau compressible constitue un élément distinct et séparable du cliché (4), le cliché et la plaque de matériau compressible comprenant des moyens (7, 9) d'assemblage amovible.Device for mounting a plate on a flexographic printing cylinder, comprising a plate (2) of compressible material provided with means for mounting the plate on the cylinder, characterized in that the plate of compressible material constitutes a separate element and separable from the plate (4), the plate and the compressible material plate comprising means (7, 9) of removable assembly. Dispositif selon la revendication 1, caractérisé en ce que ladite plaque comporte un bord (3a) d'extrémité recourbé d'accrochage du cliché (1) sur le cylindre porte-cliché et dans lequel s'engage un bord d'extrémité (2a) correspondant de la plaque de matériau compressible.Device according to claim 1, characterized in that said plate comprises an end edge (3a) curved hooking of the plate (1) on the forme cylinder and in which an end edge (2a) engages corresponding to the plate of compressible material. Dispositif selon la revendication 2, caractérisé en ce que le bord d'extrémité recourbé (3a) de la plaque de support a une forme de profilé en U.Device according to claim 2, characterized in that the curved end edge (3a) of the support plate has a U- shaped profile. Dispositif selon l'une des revendications 2 et 3, caractérisé en ce que le bord d'extrémité (3a) de la plaque de support est constitué par une baguette (7) fixée sur la plaque de support.Device according to one of claims 2 and 3, characterized in that the end edge (3a) of the support plate is constituted by a rod (7) fixed on the support plate. Dispositif selon l'une des revendications 3 et 4, caractérisé en ce que le bord d'extrémité de la plaque de matériau compressible (2) a une forme de profilé en U complémentaire de celle du bord d'extrémité de la plaque de support.Device according to one of claims 3 and 4, characterized in that the end edge of the compressible material plate (2) has a U- shaped profile complementary to that of the end edge of the support plate. Dispositif selon l'une quelconque des revendications 2 à 5, caractérisé en ce que le bord d'extrémité de la plaque de matériau compressible est constituée par une baguette (9) fixée sur la plaque (2) de matériau compressible.Device according to any one of claims 2 to 5, characterized in that the end edge of the compressible material plate is constituted by a rod (9) fixed on the plate (2) of compressible material. Dispositif selon l'une quelconque des revendications 2 à 6, caractérisé en ce que la plaque de support (3) est réalisée en polyester.Device according to any one of claims 2 to 6, characterized in that the support plate (3) is made of polyester. Dispositif selon l'une quelconque des revendications 1 à 7, caractérisé en ce que le cliché a une épaisseur comprise entre 1,7 mm et 4,3 mm, notamment égale à 2,84 mm.Device according to any one of claims 1 to 7, characterized in that the plate has a thickness of between 1.7 mm and 4.3 mm, in particular equal to 2.84 mm. Dispositif selon l'une quelconque des revendications 1 à 8, caractérisé en ce que ladite plaque de support comporte des moyens (13) complémentaires de montage de la plaque sur le cylindre d'impression prévus à l'opposé des moyens d'assemblage amovible.Device according to any one of claims 1 to 8, characterized in that said support plate comprises means (13) for mounting the plate on the printing cylinder provided opposite the removable assembly means. Dispositif selon la revendication 9, caractérisé en ce que lesdits moyens complémentaires de montage comportent un ensemble d'oeillets pratiqués dans la plaque (2) de matériau compressible et destinés à coopérer avec une nervure latérale prévue sur le cylindre par l'intermédiaire de tendeurs.Device according to claim 9, characterized in that said complementary mounting means comprise a set of eyelets made in the plate (2) of compressible material and intended to cooperate with a lateral rib provided on the cylinder by means of tensioners. Dispositif selon la revendication 9, caractérisé en ce que lesdits moyens complémentaires de montage comportent une baguette fixée sur la plaque (2) de matériau compressible.Device according to claim 9, characterized in that said complementary mounting means comprise a rod fixed on the plate (2) of compressible material.
EP13305944.4A 2013-07-03 2013-07-03 Device for mounting a printing form on a flexographic printing cylinder Active EP2821227B1 (en)

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EP13305944.4A EP2821227B1 (en) 2013-07-03 2013-07-03 Device for mounting a printing form on a flexographic printing cylinder

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EP13305944.4A EP2821227B1 (en) 2013-07-03 2013-07-03 Device for mounting a printing form on a flexographic printing cylinder

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0177302A2 (en) 1984-09-28 1986-04-09 Hercules Incorporated Compressable printing plate
EP0206760A2 (en) 1985-06-19 1986-12-30 Minnesota Mining And Manufacturing Company Mounting tape for flexographic printing plate
EP1262331A1 (en) * 2001-05-31 2002-12-04 CIELLE IMBALLAGGI DI TOMMASO LORETO S.r.l. Method for producing flexographic printing sleeves, and the sleeve obtained
EP1391320A1 (en) * 2001-05-28 2004-02-25 Tokyo Ohka Kogyo Co., Ltd. Raising member for flexographic printing and method of winding photosensitive press plate
WO2006135465A2 (en) 2005-06-09 2006-12-21 Macdermid Printing Solutions, Llc Printing element with an integral printing surface
JP4503938B2 (en) * 2003-04-23 2010-07-14 日本電子精機株式会社 Cushioning material for flexographic printing plates

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0177302A2 (en) 1984-09-28 1986-04-09 Hercules Incorporated Compressable printing plate
EP0206760A2 (en) 1985-06-19 1986-12-30 Minnesota Mining And Manufacturing Company Mounting tape for flexographic printing plate
EP1391320A1 (en) * 2001-05-28 2004-02-25 Tokyo Ohka Kogyo Co., Ltd. Raising member for flexographic printing and method of winding photosensitive press plate
EP1262331A1 (en) * 2001-05-31 2002-12-04 CIELLE IMBALLAGGI DI TOMMASO LORETO S.r.l. Method for producing flexographic printing sleeves, and the sleeve obtained
JP4503938B2 (en) * 2003-04-23 2010-07-14 日本電子精機株式会社 Cushioning material for flexographic printing plates
WO2006135465A2 (en) 2005-06-09 2006-12-21 Macdermid Printing Solutions, Llc Printing element with an integral printing surface

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