EP0211450B1 - Method and installation for fixing a printing plate on a printing cylinder - Google Patents

Method and installation for fixing a printing plate on a printing cylinder Download PDF

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Publication number
EP0211450B1
EP0211450B1 EP86200917A EP86200917A EP0211450B1 EP 0211450 B1 EP0211450 B1 EP 0211450B1 EP 86200917 A EP86200917 A EP 86200917A EP 86200917 A EP86200917 A EP 86200917A EP 0211450 B1 EP0211450 B1 EP 0211450B1
Authority
EP
European Patent Office
Prior art keywords
plate
cylinder
plates
cylindrical barrel
ribbon
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP86200917A
Other languages
German (de)
French (fr)
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EP0211450A1 (en
Inventor
John Moore
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
De la Rue 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.)
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Publication date
Application filed by De la Rue Giori SA filed Critical De la Rue Giori SA
Priority to AT86200917T priority Critical patent/ATE43294T1/en
Publication of EP0211450A1 publication Critical patent/EP0211450A1/en
Application granted granted Critical
Publication of EP0211450B1 publication Critical patent/EP0211450B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • 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
    • B41F27/10—Devices for attaching printing elements or formes to supports for attaching non-deformable curved printing formes to forme cylinders
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
    • Y10T156/1702—For plural parts or plural areas of single part
    • Y10T156/1744—Means bringing discrete articles into assembled relationship
    • Y10T156/1751—At least three articles
    • Y10T156/1754—At least two applied side by side to common base
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49938—Radially expanding part in cavity, aperture, or hollow body
    • Y10T29/4994—Radially expanding internal tube
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4998—Combined manufacture including applying or shaping of fluent material
    • Y10T29/49993—Filling of opening

Definitions

  • the present invention relates to a method and an installation for fixing printing plates to a plate cylinder of an intaglio printing machine on the spool, said cylinder comprising a cylindrical mantle of ductile material, preferably of steel. , whose inner wall is slightly conical.
  • This process is an interesting alternative to previously known processes, in particular the production of a printing plate by the transfer method, that is to say by rolling a cylinder fitted with a profile corresponding to the plate, on the cylindrical mantle, or even galvanic methods.
  • these methods remain quite expensive because the preparation of the external mold requires very precise work, the internal diameter of the mold having to correspond exactly to the external diameter of the plate cylinder when it is placed on the shaft of the printing machine. .
  • the present invention overcomes these drawbacks by proposing a method of fixing plates to the cylindrical mantle which on the one hand is simpler and less expensive and on the other hand makes it possible to ensure the continuity of the lateral surface of the cylinder holder. plates.
  • the plates are prepared in advance by traditional methods, therefore relatively inexpensive and in particular the two edges of the plates which will be parallel to the axis of the cylinder are cut meticulously so that the length of the plate corresponds exactly to the half-circumference. of the cylindrical mantle and that said edges are straight and regular.
  • the sheet which can be a second plate or in any case a plate of the same dimensions and of the same material as the first but not engraved, or two, or even several sheets placed after two edges of the first plate make it possible to ensure that during traction there is no sudden change in the surface subjected to the pressure exerted by the tape.
  • the cylindrical mantle is radially expanded, exactly as it will be when the cylinder is placed on the machine shaft, makes it possible to guarantee with precision the outside diameter of the plate cylinder in the working position.
  • the filling of the groove between the adjacent edges of two plates and its machining ensure perfect continuity of the lateral surface of the plate cylinder.
  • the cylindrical mantle can be reused because we can peel off the plates, rectify the outside surface of the cylindrical mantle and glue new plates with other designs. Any reduction in the diameter of the cylindrical mantle by rectification can be compensated for by using thicker plates.
  • the invention also relates to an example of installation allowing the implementation of the method.
  • Figure 1 is a radial sectional view of the plate cylinder with the ribbon and the traction device.
  • Figure 2 is a plan view of the object defined above.
  • a plate cylinder comprising a cylindrical mantle 1, the inner wall of which is slightly conical, is prepared by conventional methods.
  • the intaglio plates are also prepared by known methods by etching the image to be printed on the spool on two nickel plates. Thereafter the two plates are bent by passing them through a set of rollers, their radius corresponding to that of the cylinder, they are cut both in the width and in the length with precision to correspond respectively to the length and at the outer semi-circumference of the cylindrical mantle.
  • the cylindrical mantle 1 is placed on an axis 3 which has a conicity corresponding to that of the wall 2 of the cylindrical mantle.
  • the mantle 1 is pushed to obtain a radial expansion which corresponds to that which the plate cylinder will undergo when it is placed on the shaft of the printing machine.
  • the expansion corresponds to an increase in the diameter of the cylinder of approximately 0.2 mm.
  • a layer of glue in particular a film of epoxy glue, is placed on half of the surface in the peripheral direction of the coat, in reality the film covers a little more than half of the surface of the cylinder for reasons which will be explained later.
  • the first plate 4 is placed on the surface covered with the epoxy film, positioning it exactly on the cylindrical mantle, so that its two edges are perfectly parallel to the axis of the cylinder as well as its axial position relative to the mantle. cylindrical.
  • the sheet 5 is held in place by temporary means which may be apart from the aforementioned fingers, gravity by turning the axis 3 so that this sheet 5 is located on the upper half of the cylinder.
  • the first plate 4 is then surrounded by a metallic steel tightening tape 6 whose width is equal to the length of the plate cylinder and whose length is greater than the half-circumference of the plate cylinder.
  • the two ends of the ribbon 6 are provided with two L-shaped profiles 7, 8.
  • the edges of the ribbon are fixed to one of the wings of the profiles by screws 9, respectively 10.
  • the second wings of the profiles 7, 8 are fitted with tapped holes.
  • a support piece 11 is disposed on the second plate 5 by a concave cylindrical surface provided with a soft material 12 so as not to damage the surface of the sheet 5.
  • the upper part of the support piece 11 is surmounted by a part 13 whose section is in the form of a cross.
  • This piece 13 can be fixed on the support piece 11 by welding, screwing or simply placed as shown in the figure.
  • the two arms of the cross of the part 13 extend beyond the part 11 are provided with holes through which pass bolts 14 which are screwed respectively to the tapped holes of the profiles 7 and 8. By turning the bolts 14 they are screwed or unscrewed in the tapped holes, which makes it possible to increase or decrease the tensile forces exerted on the strip 6.
  • the film of adhesive interposed between the plate 4 and the cylindrical mantle is heated, for example by heating the axis 3.
  • the ribbon 6 begins to tension by exerting forces of pulling by the bolts 14.
  • the bolts are located first in the middle of the part 13 and one continues symmetrically towards the peripheral edges. In this way the excess glue is pushed towards the peripheral edges and can be eliminated and above all avoid that a heap of glue which remains trapped under the plate 4 causes a deformation of the plate 4 and consequently of the lateral surface of the cylinder holder. plates.
  • the lateral surface of the plate cylinder is continuous so that the traction forces exerted on the whole of the plate 4 including its two edges are uniform. It is moreover to ensure this uniformity and not to cause a break at the two edges of the plate 4 that the film of adhesive has been applied beyond half of the lateral surface of the cylindrical mantle, so that near the joints A and B the sheet 5 is well bonded to the cylindrical mantle and therefore the surface is absolutely continuous, at least as regards the height.
  • the heating of the adhesive is stopped and it is cooled by artificial means or by allowing the assembly to cool naturally.
  • the tape 6 and the device 11, 13 are removed, the sheet 5 is removed by peeling its two ends close to the joints A and B, a film of adhesive is placed on the second half of the surface of the cylindrical mantle, we position the second intaglio plate, we surround it with the ribbon 6 and we proceed com me previously except that this time the support piece 11 is pressed against the surface of the intaglio plate 4 pasted previously.
  • the fixing of the second plate is complete, the tape 6 and the support piece 11 are removed.
  • the surface is machined so that it is absolutely continuous.
  • the plate cylinder is removed from the axis 3 which shrinks and returns to its initial dimensions.
  • a layer of chromium is deposited on the entire lateral surface of the plate cylinder by immersing the cylinder in an electrolytic bath.
  • a layer of 8-10 microns of chromium is deposited over the entire lateral surface of the plate cylinder.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Rotary Presses (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
  • Saccharide Compounds (AREA)
  • Screen Printers (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Printing Methods (AREA)

Abstract

Two intaglio printing plates having a total length equal to the circumference of the cylindrical barrel (1) of a plate cylinder are prepared. The cylindrical barrel (1) is expanded radially, and on the portion of its surface corresponding to the first plate (4) to be attached an epoxy film is deposited. The first plate (4) is applied on the epoxy film in the exact position. On the remaining part of the cylindrical barrel (1) one or a plurality of metal sheets (5) are deposited for ensuring the continuity of the cylinder surface. The plate (4) to be attached is surrounded by a tightening ribbon (6) covering completely the plate (4). Heat is used for softening the epoxy film and the ribbon (6) is tightened by exerting tractive forces beginning from the center of the two ends of the ribbon and advancing towards the peripheral edges. The epoxy film is allowed to set, the ribbon (6) and the sheet or sheets (5) are removed. A film of epoxy is applied to the cylinder surface corresponding to the second plate to be attached and the same procedure as before is carried out.

Description

La présente invention concerne un procédé et une installation de fixation de plaques d'impression sur un cylindre porte-plaques d'une machine d'impression taille-douce à la bobine, ledit cylindre comprenant un manteau cylindrique en matière ductile, de préférence en acier, dont la paroi intérieure est légèrement conique.The present invention relates to a method and an installation for fixing printing plates to a plate cylinder of an intaglio printing machine on the spool, said cylinder comprising a cylindrical mantle of ductile material, preferably of steel. , whose inner wall is slightly conical.

Un cylindre porte-plaques pour l'impression taille-douce à la bobine doit répondre à certaines exigences très strictes qui garantissent, d'une part, la netteté de l'impression et, d'autre part, le parfait registre entre les différentes images. Les principales exigences sont les suivantes :

  • 1. Il faut que la surface latérale du cylindre porte-plaques soit continue, c'est-à-dire qu'il n'existe aucune rainure entre les plaques, pour éviter des chocs sur cette surface dûes aux très grandes pressions, auxquelles est soumis le cylindre lors de l'essuyage et l'impression et qui risquent de provoquer des déformations de la surface du cylindre, notamment sous l'influence des efforts tangentiels dûs au roulement de deux cylindres en contact.
  • 2. Concentricité parfaite du cylindre afin, d'une part, assurer un essuyage parfait après encrage et, d'autre part, pour éviter une pression irrégulière sur le cylindre porte-plaques lors de l'impression ou l'essuyage qui tendraient à déformer le manteau cylindrique pendant ces opérations.
  • 3. Le diamètre extérieur du cylindre doit être constant sur toute la longueur du cylindre afin d'obtenir un registre parfait.
  • 4. Pouvoir réutiliser le manteau cylindrique en y fixant d'autres plaques d'impression, car sa paroi intérieure étant légèrement conique pour épouser parfaitement la forme conique correspondant de l'arbre de la machine sur lequel il est fixé lors de l'impression, la fabrication du manteau demande un usinage extrêmement précis et le coût de fabrication est très élevé.
A plate cylinder for intaglio printing on the spool must meet certain very strict requirements which guarantee, on the one hand, the sharpness of the printing and, on the other hand, the perfect register between the different images. . The main requirements are:
  • 1. The lateral surface of the plate cylinder must be continuous, that is to say that there is no groove between the plates, to avoid impacts on this surface due to very high pressures, at which subject the cylinder during wiping and printing and which risk causing deformations of the cylinder surface, in particular under the influence of tangential forces due to the rolling of two cylinders in contact.
  • 2. Perfect concentricity of the cylinder in order, on the one hand, to ensure perfect wiping after inking and, on the other hand, to avoid irregular pressure on the plate cylinder during printing or wiping which would tend to deform the cylindrical mantle during these operations.
  • 3. The outside diameter of the cylinder must be constant over the entire length of the cylinder in order to obtain a perfect register.
  • 4. Being able to reuse the cylindrical mantle by attaching other printing plates to it, because its inner wall is slightly conical to perfectly match the corresponding conical shape of the machine shaft on which it is fixed during printing, the manufacture of the coat requires extremely precise machining and the manufacturing cost is very high.

On a proposé dans le brevet USA 4 224 095 un procédé de fabrication consistant à fixer sur le manteau cylindrique, après avoir interposé un film de colle, les plaques d'impression cintrées, de telle sorte qu'il n'y ait pas de discontinuité. Pour cela on dispose d'un moule cylindrique creux composé d'au moins deux coquilles et dont le diamètre intérieur est égal au diamètre extérieur du cylindre porte-plaques à obtenir. On place à l'intérieur de la première coquille une plaque gravée, ensuite on place le manteau cylindrique muni du film de colle, on place sur le manteau la seconde plaque et par la suite la seconde coquille. On chauffe pour ramollir la colle, on dilate radialement le manteau cylindrique, de sorte que les plaques d'impression soient pressées contre le moule, on laisse durcir la colle et l'on démoule le cylindre porte-plaques. La dilatation radiale est obtenue en introduisant un cône d'expansion dans la paroi conique du manteau cylindrique.In US patent 4,224,095, a manufacturing process has been proposed, which consists in fixing the curved printing plates to the cylindrical mantle, after having interposed a film of glue, so that there is no discontinuity. . For this, there is a hollow cylindrical mold composed of at least two shells and the inside diameter of which is equal to the outside diameter of the plate cylinder to be obtained. An engraved plate is placed inside the first shell, then the cylindrical mantle provided with the adhesive film is placed, the second plate is placed on the mantle and then the second shell. It is heated to soften the glue, the cylindrical mantle is expanded radially, so that the printing plates are pressed against the mold, the glue is allowed to harden and the plate cylinder is demolded. The radial expansion is obtained by introducing an expansion cone into the conical wall of the cylindrical mantle.

Ce procédé est une alternative intéressante aux procé dés connus antérieurement, notamment la production d'une plaque d'impression par la méthode de transfert, c'est-à-dire en transférant par roulement d'un cylindre muni d'un profil correspondant à la plaque, sur le manteau cylindrique, ou encore des méthodes galvaniques. Pourtant ces procédés restent assez coûteux car la préparation du moule extérieur demande un travail de grande précision, le diamètre intérieur du moule devant correspondre exactement au diamètre extérieur du cylindre porte-plaques lorsqu'il est placé sur l'arbre de la machine d'impression. D'autre part il est extrêmement difficile de couper les plaques de sorte qu'il n'y ait aucune discontinuité de la surface latérale du cylindre porte-plaques après le collage des deux plaques gravées.This process is an interesting alternative to previously known processes, in particular the production of a printing plate by the transfer method, that is to say by rolling a cylinder fitted with a profile corresponding to the plate, on the cylindrical mantle, or even galvanic methods. However, these methods remain quite expensive because the preparation of the external mold requires very precise work, the internal diameter of the mold having to correspond exactly to the external diameter of the plate cylinder when it is placed on the shaft of the printing machine. . On the other hand, it is extremely difficult to cut the plates so that there is no discontinuity in the lateral surface of the plate cylinder after the bonding of the two engraved plates.

La présente invention permet de palier ces inconvénients en proposant un procédé de fixation de plaques sur le manteau cylindrique lequel d'une part est plus simple et moins onéreux et d'autre part permet d'assurer la continuité de la surface latérale du cylindre porte-plaques.The present invention overcomes these drawbacks by proposing a method of fixing plates to the cylindrical mantle which on the one hand is simpler and less expensive and on the other hand makes it possible to ensure the continuity of the lateral surface of the cylinder holder. plates.

Le procédé selon l'invention est caractérisé par le fait que :

  • a) on prépare au moins deux plaques d'impression taille-douce dont la somme des longueurs est égale à la circonférence du manteau cylindrique et on les cintre;
  • b) on dilate radialement dans les limites de déformation élastique le manteau cylindrique par des moyens mécaniques de sorte que le diamètre extérieur du cylindre après la fixation des plaques soit égal au diamètre qu'il doit avoir dans la machine d'impression;
  • c) on dépose une couche d'un produit adhésif sur une partie de la surface du manteau cylindrique correspondant aux dimensions de la surface d'une plaque mais dont la longeur dans le sens périphérique est de préférence légèrement supérieure à la longueur d'une plaque.
  • d) on applique l'une des plaques d'impression sur la surface du manteau cylindrique munie du film de produit adhésif, en la positionnant et en la maintenant à la position exacte qu'elle doit occuper sur le manteau cylindrique;
  • e) on dispose sur la surface du manteau cylindrique et à la suite de deux bords de la plaque d'impression, parallèles à l'axe du manteau cylindrique, au moins une feuille ayant la même épaisseur et la même largeur que la plaque, et de degré de dureté proche de celui de la plaque d'impression, de préférence une seule feuille de longueur égale à la longueur périphérique de la surface non couverte du manteau cylindrique pour assurer la continuité de la surface du cylindre porte-plaques au-delà de la partie de la surface du manteau cylindrique sur laquelle est disposée la plaque d'impression;
  • f) on dispose autour de la plaque d'impression un ruban de serrage, notamment en acier, la recouvrant complètement et dont la longueur est supérieure à celle de la plaque, de sorte qu'il recouvre également la ou les feuilles au moins à proximité des deux bords transversaux de la plaque, les zones des deux extrémités du ruban étant tangentes au cylindre porte-plaques;
  • g) après avoir rendu le produit adhésif mou, par exemple par chauffage, on applique à des points régulièrement répartis sur les deux extrémités du ruban des forces de traction dont les directions sont orthogonales à l'axe du cylindre en commençant l'application à partir des points se trouvant au milieu des extrémités respectives et en allant symétriquement vers les bords périphériques, de sorte que le surplus du produit adhésif soit poussé vers ces bords périphériques du manteau cylindrique;
  • h) lorsque le produit adhésif a durci, on enlève le ruban et la ou les feuille, on applique une couche d'un produit adhésif sur une autre partie de la surface du manteau cylindrique correspondant aux dimensions de la surface de la deuxième plaque, on y applique la deuxième plaque d'impression, on place le cas échéant dans la partie de la surface du cylindre non couverte par les plaques une ou plusieurs feuilles comme précédemment, on la couvre avec le ruban comme la première et on applique des forces de traction comme précédemmment jusqu'à ce que le produit adhésif ait durci, ensuite on enlève le ruban;
  • i) on répète le cas échéant la dernière opération jusqu'à ce que la totalité de la surface d'impression du cylindre porte-plaques soit completée;
  • j) on remplit les rainures entre les plaques et on usine pour obtenir une surface latérale continue;
  • k) on cesse l'application des efforts provoquant la dilatation du manteau cylindrique qui revient à ses dimensions initiales.
The method according to the invention is characterized in that:
  • a) at least two intaglio printing plates are prepared, the sum of the lengths of which is equal to the circumference of the cylindrical mantle and they are bent;
  • b) the cylindrical mantle is expanded radially within the limits of elastic deformation by mechanical means so that the outside diameter of the cylinder after the fixing of the plates is equal to the diameter which it must have in the printing machine;
  • c) a layer of an adhesive product is deposited on a part of the surface of the cylindrical mantle corresponding to the dimensions of the surface of a plate but the length of which in the peripheral direction is preferably slightly greater than the length of a plate .
  • d) one of the printing plates is applied to the surface of the cylindrical mantle provided with the film of adhesive product, by positioning it and maintaining it in the exact position which it must occupy on the cylindrical mantle;
  • e) at least one sheet having the same thickness and the same width as the plate is placed on the surface of the cylindrical mantle and following two edges of the printing plate, parallel to the axis of the cylindrical mantle; and of a hardness degree close to that of the printing plate, preferably a single sheet of length equal to the peripheral length of the uncovered surface of the cylindrical mantle to ensure the continuity of the surface of the plate cylinder beyond the part of the surface of the cylindrical mantle on which the printing plate is arranged;
  • f) there is arranged around the printing plate a tightening tape, in particular of steel, covering it completely and the length of which is greater than that of the plate, so that it also covers the sheet or sheets at least nearby from the two transverse edges of the plate, the zones of the two ends of the strip being tangent to the plate cylinder;
  • g) after having made the adhesive product soft, for example by heating, is applied to points regularly distributed on the two ends of the tape of the tensile forces whose directions are orthogonal to the axis of the cylinder by starting the application from points lying in the middle of the respective ends and going symmetrically towards the peripheral edges, so that the excess of the adhesive product is pushed towards these peripheral edges of the cylindrical mantle;
  • h) when the adhesive product has hardened, the tape and the sheet or sheets are removed, a layer of adhesive product is applied to another part of the surface of the cylindrical mantle corresponding to the dimensions of the surface of the second plate, apply the second printing plate to it, place if necessary in the part of the surface of the cylinder not covered by the plates one or more sheets as above, cover it with the ribbon like the first and apply tensile forces as before until the adhesive product has hardened, then the tape is removed;
  • i) the last operation is repeated if necessary until the entire printing surface of the plate cylinder is completed;
  • j) the grooves between the plates are filled and machined to obtain a continuous lateral surface;
  • k) the application of the forces causing the expansion of the cylindrical mantle which returns to its initial dimensions is stopped.

Les avantages de ce procécé sont les suivants, en se référant au cas où le cylindre doit être équipé de deux plaques :The advantages of this process are as follows, with reference to the case where the cylinder must be equipped with two plates:

Les plaques sont préparées d'avance par les méthodes traditionnelles, donc relativement peu coûteuses et notamment les deux bords des plaques qui seront parallèles à l'axe du cylindre sont coupées minutieusement de sorte que la longueur de la plaque corresponde exactement à la demi-circonférence du manteau cylindrique et que lesdits bords soient droits et réguliers. Lors du collage on peut compenser les éventuelles erreurs du diamètre extérieur du cylindre porte-plaques en utilisant une plaque d'impression plus ou moins épaisse. La feuille qui peut être une deuxième plaque ou en tout cas une plaque de mêmes dimensions et de même matériau que la première mais non gravée, ou deux, voire plusieurs feuilles placées à la suite de deux bords de la première plaque permettent d'assurer que lors de la traction il n'y a pas de changement brusque de la surface soumise à la pression exercée par le ruban. Un brusque changement provoquerait une concentration de l'effort à cet endroit, donc une déformation des bords de la plaque qui créerait des irrégularités sur la surface latérale du cylindre. La pression exercée sur la plaque étant homogène sur toute sa surface on assure une adhésion parfaite de la plaque et on évite les éventuelles déformations qui pourraient provenir d'une pression non homogène appliquée lors du collage. En appliquant les forces de traction en commençant par les milieux des deux extrémités du ruban et allant axialement vers les bords périphériques du cylindre, le surplus de colle est poussé vers l'extérieur et il ne s'accumule pas sous certains endroits de la plaque, évitant ainsi de créer des déformations de la surface du cylindre. Le fait que le manteau cylindrique est dilaté radialement, exactement comme il le sera lorsque le cylindre sera placé sur l'arbre de la machine, permet de garantir avec précision le respect du diamètre extérieur du cylindre porte-plaques en position de travail. Le remplissage de la rainure entre les bords adjacents de deux plaques et son usinage assurent la parfaite continuité de la surface latérale du cylindre porte-plaques. Enfin, après l'impression le manteau cylindrique peut être réutilisé car on peut décoller les plaques, rectifier la surface extérieure du manteau cylindrique et coller des nouvelles plaques avec d'autres dessins. L'éventuelle diminution du diamètre du manteau cylindrique par la rectification peut être compensée en utilisant des plaques plus épaisses.The plates are prepared in advance by traditional methods, therefore relatively inexpensive and in particular the two edges of the plates which will be parallel to the axis of the cylinder are cut meticulously so that the length of the plate corresponds exactly to the half-circumference. of the cylindrical mantle and that said edges are straight and regular. When bonding, it is possible to compensate for any errors in the outside diameter of the plate cylinder by using a more or less thick printing plate. The sheet which can be a second plate or in any case a plate of the same dimensions and of the same material as the first but not engraved, or two, or even several sheets placed after two edges of the first plate make it possible to ensure that during traction there is no sudden change in the surface subjected to the pressure exerted by the tape. A sudden change would cause a concentration of the force at this point, therefore a deformation of the edges of the plate which would create irregularities on the lateral surface of the cylinder. The pressure exerted on the plate being homogeneous over its entire surface, a perfect adhesion of the plate is ensured and any deformations which could come from non-homogeneous pressure applied during bonding are avoided. By applying the tensile forces starting at the midpoints of the two ends of the tape and going axially towards the peripheral edges of the cylinder, the excess adhesive is pushed outwards and it does not accumulate in certain places on the plate, thus avoiding creating deformations of the surface of the cylinder. The fact that the cylindrical mantle is radially expanded, exactly as it will be when the cylinder is placed on the machine shaft, makes it possible to guarantee with precision the outside diameter of the plate cylinder in the working position. The filling of the groove between the adjacent edges of two plates and its machining ensure perfect continuity of the lateral surface of the plate cylinder. Finally, after printing, the cylindrical mantle can be reused because we can peel off the plates, rectify the outside surface of the cylindrical mantle and glue new plates with other designs. Any reduction in the diameter of the cylindrical mantle by rectification can be compensated for by using thicker plates.

Le remplissage des rainures entre les bords de deux plaques peut se faire de différentes manières :

  • 1. Si l'image à imprimer sur la bobine lors d'un tour complet du cylindre n'est pas continue c'est-à-dire s'il y a des espaces vides s'étendant sur les plaques dans le sens axial et qui correspondent à des parties du papier qui seront découpées et éliminées lors du coupage, alors dans ce cas on remplit les rainures avec une colle epoxy et après son durcis sement on usine pour assurer une continuité satisfaisante de la surface latérale du cylindre. Bien sûr cette solution est adoptée si les zones dans lesquelles se trouvent les rainures correspondent aux parties du papier à éliminer lors du coupage de la bobine imprimée.
  • 2. Si l'image à imprimer sur la bobine doit être absolument continue, alors il faut que la surface latérale du cylindre porte-laques soit parfaitement continue. Dans ce cas on a en principe deux solutions :
    • - remplir les rainures par électrodéposition ou soudage, par exemple au laser, avec la même matière que les plaques notamment du Nickel et ensuite usiner la surface jusqu'à l'obtention d'une surface latérale parfaitement continue;
    • - par fraisage ou tout autre moyen on crée une rainure régulière de préférence de section rectangulaire entre les bords adjacents de deux plaques et on y introduit une bande de la même matière que les plaques, de préférence du Nickel de dimensions correspondantes à celle de la rainure et ensuite on usine cette partie pour obtenir la continuité de la surface latérale du cylindre.
Filling the grooves between the edges of two plates can be done in different ways:
  • 1. If the image to be printed on the spool during a complete revolution of the cylinder is not continuous, that is to say if there are empty spaces extending on the plates in the axial direction and which correspond to parts of the paper which will be cut and eliminated during cutting, then in this case the grooves are filled with an epoxy adhesive and after hardening it is machined to ensure satisfactory continuity of the lateral surface of the cylinder. Of course this solution is adopted if the areas in which the grooves are found correspond to the parts of the paper to be removed when cutting the printed spool.
  • 2. If the image to be printed on the spool must be absolutely continuous, then the lateral surface of the lacquer cylinder must be perfectly continuous. In this case there are in principle two solutions:
    • - fill the grooves by electrodeposition or welding, for example by laser, with the same material as the plates, in particular nickel, and then machine the surface until a perfectly continuous lateral surface is obtained;
    • - By milling or any other means, a regular groove, preferably of rectangular section, is created between the adjacent edges of two plates and a strip of the same material as the plates is introduced, preferably Nickel, of dimensions corresponding to that of the groove. and then this part is machined to obtain the continuity of the lateral surface of the cylinder.

Après avoir fixé les plaques et procédé à la rectification des joints des deux plaques on applique une couche de chrome sur la totalité de la surface du cylindre porte-plaques par exemple en plongeant le cylindre, après l'avoir retiré de l'axe dans un bain électrolytique.After fixing the plates and proceeding to the rectification of the joints of the two plates, a layer of chromium is applied to the entire surface of the plate cylinder, for example by immersing the cylinder, after having removed it from the axis in a electrolytic bath.

L'invention concerne également un exemple d'installation permettant la mise en oeuvre du procédé.The invention also relates to an example of installation allowing the implementation of the method.

L'invention sera décrite plus en détail à l'aide du dessin annexé présentant schématiquement une partie de l'installation pour la mise en oeuvre du procédé.The invention will be described in more detail using the attached drawing schematically showing part of the installation for implementing the method.

La figure 1 est une vue en coupe radiale du cylindre porte-plaques avec le ruban et le dispositif de traction.Figure 1 is a radial sectional view of the plate cylinder with the ribbon and the traction device.

La figure 2 est une vue en plan de l'objet défini précédemment.Figure 2 is a plan view of the object defined above.

L'exemple décrit concerne un cylindre à deux plaques. On prépare par les méthodes conventionnelles un cylindre porte-plaques comprenant un manteau cylindrique 1 dont la paroi intérieure est légèrement conique. On prépare les plaques taille-douce également par les méthodes connues en gravant l'image à imprimer sur la bobine sur deux plaques de Nickel. Par la suite on cintre les deux plaques en les faisant passer dans un jeu de rouleaux, leur rayon correspondant à celui du cylindre, on les découpe aussi bien dans le sens de la largeur que de la longueur avec précision pour correspondre respectivement à la longueur et à la demicirconférence extérieure du manteau cylindrique. On dispose le manteau cylindrique 1 sur un axe 3 qui présente une conicité correspondant à celle de la paroi 2 du manteau cylindrique. On pousse le manteau 1 pour obtenir une dilatation radiale qui correspond à celle que subira le cylindre portre-plaque lorsqu'il sera disposé sur l'arbre de la machine d'impression. La dilatation correspond à une augmentation du diamètre du cylindre d'environ 0,2 mm.The example described relates to a cylinder with two plates. A plate cylinder comprising a cylindrical mantle 1, the inner wall of which is slightly conical, is prepared by conventional methods. The intaglio plates are also prepared by known methods by etching the image to be printed on the spool on two nickel plates. Thereafter the two plates are bent by passing them through a set of rollers, their radius corresponding to that of the cylinder, they are cut both in the width and in the length with precision to correspond respectively to the length and at the outer semi-circumference of the cylindrical mantle. The cylindrical mantle 1 is placed on an axis 3 which has a conicity corresponding to that of the wall 2 of the cylindrical mantle. The mantle 1 is pushed to obtain a radial expansion which corresponds to that which the plate cylinder will undergo when it is placed on the shaft of the printing machine. The expansion corresponds to an increase in the diameter of the cylinder of approximately 0.2 mm.

Par la suite on dispose sur la moitié de la surface dans le sens périphérique du manteau, une couche de colle, notamment un film de colle epoxy, en réalité le film couvre un peu plus de la moitié de la surface du cylindre pour des raisons qui seront expliquées ultérieurement. On dispose sur la surface recou- verte avec le film epoxy la première plaque 4 en la positionnant avec exactitude sur le manteau cylindrique, de sorte que ses deux bords soient parfaitement parallèles à l'axe du cylindre ainsi que sa position axiale par rapport au manteau cylindrique. Pour obtenir cet ajustement et maintenir la plaque 4 dans cette position on peut, par exemple, utiliser deux bagues vissées sur l'axe 3 de part et d'autre du manteau cylindrique 1 et dont le diamètre est supérieur à celui du manteau et sur lesquelles on peut disposer des doigts se projetant axialement vers le manteau cylindrique pour maintenir axialement la plaque d'impression 4. Les doigts collaborent en principe avec des encoches prévues à cet effet sur les bords cintrés de la plaque 4.Thereafter, a layer of glue, in particular a film of epoxy glue, is placed on half of the surface in the peripheral direction of the coat, in reality the film covers a little more than half of the surface of the cylinder for reasons which will be explained later. The first plate 4 is placed on the surface covered with the epoxy film, positioning it exactly on the cylindrical mantle, so that its two edges are perfectly parallel to the axis of the cylinder as well as its axial position relative to the mantle. cylindrical. To obtain this adjustment and maintain the plate 4 in this position, it is possible, for example, to use two rings screwed onto the axis 3 on either side of the cylindrical mantle 1 and whose diameter is greater than that of the mantle and on which it is possible to have the fingers projecting axially towards the cylindrical mantle to axially hold the printing plate 4. The fingers in principle collaborate with notches provided for this purpose on the curved edges of the plate 4.

Lorsque la plaque 4 est positionnée correctement on peut t'immobiliser à cette place au moyen de deux rivets que l'on peut introduire à proximité des deux bords cintrés de la plaque et qui collaborent avec deux trous correspondants prévus sur le manteau cylindrique 1.When the plate 4 is positioned correctly, you can immobilize yourself in this place by means of two rivets which can be introduced near the two curved edges of the plate and which collaborate with two corresponding holes provided on the cylindrical mantle 1.

Par la suite on dispose à la suite de la plaque gravée 4 et sur la seconde moitié du manteau cylindrique une feuille 5 formée d'une plaque, en principe non gravée, ayant les dimensions exactes de la seconde plaque taille-douce que l'on fixera ultérieurement, de sorte que la surface latérale du cylindre porte-plaques soit continue. La feuille 5 est maintenue en place par des moyens provisoires qui pourront être à part des doigts mentionnés précédemment, la gravité en tournant l'axe 3 de sorte que cette feuille 5 se trouve sur la moitié supérieure du cylindre.Subsequently, there is a plate 5 formed on the second half of the cylindrical mantle, following the engraved plate 4, formed of a plate, in principle not engraved, having the exact dimensions of the second intaglio plate which is fix later, so that the side surface of the plate cylinder is continuous. The sheet 5 is held in place by temporary means which may be apart from the aforementioned fingers, gravity by turning the axis 3 so that this sheet 5 is located on the upper half of the cylinder.

On entoure alors la première plaque 4 par un ruban de serrage métallique en acier 6 dont la largeur est égale à la longueur du cylindre porte-plaques et dont la longueur est supérieure à la demi-circonférence du cylindre porte-plaques.The first plate 4 is then surrounded by a metallic steel tightening tape 6 whose width is equal to the length of the plate cylinder and whose length is greater than the half-circumference of the plate cylinder.

Les deux extrémités du ruban 6 sont munies de deux profilés en forme de L 7, 8. Les bords du ruban sont fixés sur l'une des ailes des profilés par des vis 9, respectivement 10. Les secondes ailes des profilés 7, 8 sont munies de trous taraudés.The two ends of the ribbon 6 are provided with two L-shaped profiles 7, 8. The edges of the ribbon are fixed to one of the wings of the profiles by screws 9, respectively 10. The second wings of the profiles 7, 8 are fitted with tapped holes.

Une pièce d'appui 11 est disposée sur la seconde plaque 5 par une surface concave cylindrique munie d'une matière molle 12 pour ne pas abîmer la surface de la feuille 5. La partie supérieure de la pièce d'appui 11 est surmontée d'une pièce 13 dont la section est en forme de croix. Cette pièce 13 peut être fixée sur la pièce d'appui 11 par soudage, vissage ou être simplement posée comme représenté à la figure. Les deux bras de la croix de la pièce 13 s'étendent au-delà de la pièce 11 sont munis de trous à travers lesquels passent des boulons 14 qui sont vissés respectivement aux trous taraudés des profilés 7 et 8. En faisant tourner les boulons 14 on les visse ou les dévisse dans les trous taraudés ce qui permet d'augmenter ou diminuer les forces de traction exercées sur le ruban 6.A support piece 11 is disposed on the second plate 5 by a concave cylindrical surface provided with a soft material 12 so as not to damage the surface of the sheet 5. The upper part of the support piece 11 is surmounted by a part 13 whose section is in the form of a cross. This piece 13 can be fixed on the support piece 11 by welding, screwing or simply placed as shown in the figure. The two arms of the cross of the part 13 extend beyond the part 11 are provided with holes through which pass bolts 14 which are screwed respectively to the tapped holes of the profiles 7 and 8. By turning the bolts 14 they are screwed or unscrewed in the tapped holes, which makes it possible to increase or decrease the tensile forces exerted on the strip 6.

Avant d'exercer ces forces de traction on chauffe le film de colle interposé entre la plaque 4 et le manteau cylindrique en chauffant par exemple l'axe 3. Lorsque la colle est bien ramollie on commence à tendre le ruban 6 en exerçant des forces de traction par les boulons 14. On serre d'abord les boulons se trouvant vers le milieu de la pièce 13 et l'on continue symétriquement vers les bords périphériques. De cette manière le surplus de colle est poussé vers les bords périphériques et peut être éliminé et surtout éviter qu'un amas de colle resté prisonnier sous la plaque 4 provoque une déformation de la plaque 4 et par conséquent de la surface latérale du cylindre porte-plaques. Il est absolument essentiel de souligner qu'aux joints A,B entre la plaque 4 et la feuille 5 la surface latérale du cylindre porte-plaques est continue de sorte que les efforts de tractions exercés sur la totalité de la plaque 4 y compris ses deux bords sont uniformes. C'est d'ailleurs pour assurer cette uniformité et ne pas provoquer une cassure aux deux bords de la plaque 4 que l'on a appliqué le film de colle au-delà de la moitié de la surface latérale du manteau cylindrique, afin qu'à proximité des joints A et B la feuille 5 soit bien collée sur le manteau cylindrique et donc la surface soit absolument continue, tout au moins en ce qui concerne la hauteur.Before exerting these tensile forces, the film of adhesive interposed between the plate 4 and the cylindrical mantle is heated, for example by heating the axis 3. When the adhesive is well softened, the ribbon 6 begins to tension by exerting forces of pulling by the bolts 14. The bolts are located first in the middle of the part 13 and one continues symmetrically towards the peripheral edges. In this way the excess glue is pushed towards the peripheral edges and can be eliminated and above all avoid that a heap of glue which remains trapped under the plate 4 causes a deformation of the plate 4 and consequently of the lateral surface of the cylinder holder. plates. It is absolutely essential to underline that at the joints A, B between the plate 4 and the sheet 5 the lateral surface of the plate cylinder is continuous so that the traction forces exerted on the whole of the plate 4 including its two edges are uniform. It is moreover to ensure this uniformity and not to cause a break at the two edges of the plate 4 that the film of adhesive has been applied beyond half of the lateral surface of the cylindrical mantle, so that near the joints A and B the sheet 5 is well bonded to the cylindrical mantle and therefore the surface is absolutely continuous, at least as regards the height.

Lorsqu'on a obtenu le serrage désiré on arrête le chauffage de la colle et l'on refroidit par des moyens artificiels ou en laissant l'ensemble se refroidir naturellement. Lorsque le refroidissement est terminé on enlève le ruban 6 et le dispositif 11, 13 on enlève la feuille 5 en décollant ses deux extrémités proches des joints A et B, on met un film de colle sur la deuxième moitié de la surface du manteau cylindrique, on positionne la seconde plaque taille-douce, on l'entoure avec le ruban 6 et l'on procède comme précédemment sauf que cette fois la pièce d'appui 11 est appuyée contre la surface de la plaque taille-douce 4 collée précédemment. Lorsque la fixation de la seconde plaque est terminée on enlève le ruban 6 et la pièce d'appui 11.When the desired tightening has been obtained, the heating of the adhesive is stopped and it is cooled by artificial means or by allowing the assembly to cool naturally. When the cooling is finished, the tape 6 and the device 11, 13 are removed, the sheet 5 is removed by peeling its two ends close to the joints A and B, a film of adhesive is placed on the second half of the surface of the cylindrical mantle, we position the second intaglio plate, we surround it with the ribbon 6 and we proceed com me previously except that this time the support piece 11 is pressed against the surface of the intaglio plate 4 pasted previously. When the fixing of the second plate is complete, the tape 6 and the support piece 11 are removed.

Par la suite on doit s'occuper du remplissage des rainures entre les bords des deux plaques taille-douce de la manière suivante :

  • - Si le dessin imprimé sur la bobine n'est pas continu aux droits de deux joints entre les deux plaques il suffit de remplir ces rainures avec de la colle epoxy et après le durcissement usiner la surface pour obtenir une surface quasi-continue.
  • - Si par contre le dessin est continu aux droits de deux joints alors il faut que la surface y soit absolument continue à ces endroits. Pour cela on peut en principe procéder de deux manières :
    • 1. Soit on remplit les deux rainures par la même matière que les plaques soit habituellement du Nickel par soudage au laser ou par électrodéposition;
    • 2. Soit on rend les rainures uniformes au point de vue dimension par exemple pour fraisage et alors on introduit dans les interstices un ruban de la même matière que les plaques soit habituellement du Nickel de dimensions correspondantes à celle des rainures.
Thereafter we must take care of filling the grooves between the edges of the two intaglio plates as follows:
  • - If the drawing printed on the spool is not continuous at the right of two joints between the two plates, it suffices to fill these grooves with epoxy glue and after hardening machine the surface to obtain a quasi-continuous surface.
  • - If on the other hand the drawing is continuous at the rights of two joints then the surface must be absolutely continuous at these places. In principle, this can be done in two ways:
    • 1. Either the two grooves are filled with the same material as the plates are usually nickel by laser welding or by electroplating;
    • 2. Either the grooves are made uniform from the point of view of dimension, for example for milling, and then a ribbon of the same material is introduced into the interstices as the plates are usually nickel with dimensions corresponding to that of the grooves.

Par la suite on usine la surface pour qu'elle soit absolument continue.Subsequently, the surface is machined so that it is absolutely continuous.

Une fois la rectification de la surface terminée on retire le cylindre porte-plaques de l'axe 3 qui se rétrécit et revient à ses dimensions initiales. On dépose une couche de chrome sur la totalité de la surface latérale du cylindre porte-plaques en plongeant le cylindre dans un bain électrolytique.Once the rectification of the surface has been completed, the plate cylinder is removed from the axis 3 which shrinks and returns to its initial dimensions. A layer of chromium is deposited on the entire lateral surface of the plate cylinder by immersing the cylinder in an electrolytic bath.

En principe on dépose une couche de 8-10 microns de chrome sur la totalité de la surface latérale du cylindre porte-plaques.In principle, a layer of 8-10 microns of chromium is deposited over the entire lateral surface of the plate cylinder.

Il est à relever qu'au lieu d'utiliser lors du collage de la première plaque taille-douce 4 une seule feuille 5 on peut utiliser deux feuilles disposées à la suite des deux bords de la page 4, mais leur mise en place est un peu plus difficile et l'on préfère utiliser une feuille entière.It should be noted that instead of using a single sheet 4 when gluing the first intaglio plate 5, two sheets can be used arranged after the two edges of page 4, but their placement is a little more difficult and we prefer to use a whole sheet.

Le dispositif de traction décrit n'est bien sûr qu'un exemple de réalisation et peut être modifié sans qu'il soit considéré que l'on s'éloigne de l'esprit de l'invention.The traction device described is of course only an exemplary embodiment and can be modified without it being considered that one departs from the spirit of the invention.

De même au lieu d'avoir à fixer seulement deux plaques sur le cylindre on peut en avoir plus, par exemple trois, si le diamètre du cylindre l'exige, au moyen du procédé et de l'installation décrite précédemment.Similarly, instead of having to fix only two plates on the cylinder, one can have more, for example three, if the diameter of the cylinder requires it, by means of the method and the installation described above.

Claims (10)

1. Method of attaching printing plates to a plate cylinder of a web fed intaglio printing machine, said cylinder comprising a cylindrical barrel of ductile material, preferably steel, having a slightly tapered nner wall, characterized by the fact that:
a) at least two intaglio printing plates of which the sum of the lengths is equal to the circumference of the cylindrical barrel are prepared and then bent;
b) the cylindrical barrel is expanded radially within the limits of elastic deformation by using mechanical means so that the outer diameter of the cylinder after fixing the plates thereto is equal to the diameter it should have in the printing machine;
c) a layer of adhesive substance is applied to one portion of the surface of the cylindrical barrel which corresponds to the dimensions of the surface of a plate, but of which the length in the peripheral direction is preferably slightly greater than the length of a plate;
d) one of the printing plates is applied to the surface of the cylindrical barrel coated with the film of the adhesive substance, while positioning and holding said one plate in exactly the position it should have on the cylindrical barrel;
e) on the surface of the cylindrical barrel and next to the two edges of the printing plate which are parallel to the axis of the cylindrical barrel, there is disposed at least one sheet having the same thickness and width as the plate, and a degree of hardness close to that of the printing plate, preferably a single sheet of same lenght as the peripheral length of the non-covered surface of the cylindrical barrel for preserving the continuity of the surface of the plate cylinder beyond that portion of the surface of the cylindrical barrel on which the printing plate is placed;
f) a tightening ribbon, notably of steel, is disposed around the printing plate so as to cover this plate completely, the length of said ribbon being greater than that of said plate, so that it will also cover the sheet or sheets at least in the vicinity of the two transverse edges of the plate, the areas of the two ends of the ribbon being tangent to the plate cylinder;
g) after softening the adhesive substance, for example by heating, tractive forces are exerted at points distributed regularly along the two ends of the ribbon in directions orthogonal to the cylinder axis, by beginning the exertion from points located at the centers of the respective ends and advancing symmetrically towards the peripheral edges, so that the excess of the adhesive substance will be forced towards said peripheral edges of the cylindrical barrel;
h) when the adhesive substance has set, the ribbon and the sheet or sheets is or are removed, a layer of adhesive substance is applied to another portion of the surface of the cylindrical barrel which corresponds to the dimensions of the surface of the second plate, this second printing plate is applied thereto, if necessary one or more sheets are disposed as before in the portion of the cylinder surface not covered by the plates, the second printing plate is covered with the ribbon like the first one, and tractive forces are exerted as in the preceding step until the adhesive substance has hardened, whereafter the ribbon is removed;
i) the last operation is repeated, if necessary, until the complete printing surface of the plate cylinder is covered;
j) the grooves formed between the plates are filled up and these areas are machined to provide a continuous peripheral surface;
k) the application of forces causing the expansion of the cylindrical barrel is discontinued so that the barrel will resume its initial dimensions.
2. Method according to claim 1, characterized by the fact that the grooves formed between the plates are filled by electro-deposition with the same material as the printing plates, preferably nickel.
3. Method according to claim 1, characterized by the fact that the grooves formed between the plates are filled by welding with the same material as the plates, notably nickel.
4. Method according to claim 1, characterized by the fact that the grooves are milled to have accurate dimensions, and preferably a rectangular cross-section, and are subsequently filled with a metal strip of the same material as the plates, notably nickel, of corresponding dimensions, and that each strip is secured on both sides by welding.
5. Method according to claim 1, characterized by the fact that the grooves formed between the two plates are filled with an epoxy resin.
6. Method according to any of claims 1-5, characterized by the fact that after filling and machining the grooves a chromium coating is applied to the entire printing surface of the plate cylinder.
7. Method according to any of claims 1-6, characterized by the fact that the layer of the adhesive product is a film of an adhesive product.
8. Method according to any of claims 1-7, characterized by the fact that the sheet or sheets used consists of the same material as the plate.
9. Arrangement for carrying out the method according to claim 1, characterized by the fact that it comprises a shaft (3) having a slightly tapered surface corresponding to the taper of the inner wall (2) of the cylinder to be mounted on said shaft (3), and thrust axially for obtaining the desired radial expansion of the cylindrical barrel (1), means for heating the cylindrical barrel (1), a metal ribbon (6), preferably of steel, of a width at least equal to that of an intaglio plate (4) and a length greater than the halfcir- cumference of the plate cylinder, that the two ends of said ribbon (6) extending parallel to the cylinder axis are provided with means (7, 9, 8, 10) for coupling to a traction device (11, 13, 14), permitting the exertion of traction forces tangential to the lateral surface of the cylinder and perpendicular to the cylinder axis.
10. Arrangement according to claim 9, characterized by the fact that the traction device comprises a pressure member (11) adapted to bear against the surface of the cylinder with a concave cylindrical wall and having a length at least equal to the length of said cylinder, said cylindrical wall being lined with a soft material (12) to prevent the surface of the plate cylinder from being damaged, that said pressure member (11) comprises on its portion opposite said cylindrical wall means (13, 14) permitting on the one hand the coupling to the two edges of said ribbon and on the other hand of exerting tractive forces in directions tangential to the cylinder and perpendicular to the cylinder axis.
EP86200917A 1985-07-26 1986-05-27 Method and installation for fixing a printing plate on a printing cylinder Expired EP0211450B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86200917T ATE43294T1 (en) 1985-07-26 1986-05-27 DEVICE AND METHOD FOR MOUNTING PRESSURE PLATES ON PLATE CYLINDER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH325885 1985-07-26
CH3258/85 1985-07-26

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EP0211450A1 EP0211450A1 (en) 1987-02-25
EP0211450B1 true EP0211450B1 (en) 1989-05-24

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US (2) US4680067A (en)
EP (1) EP0211450B1 (en)
JP (1) JPS6228247A (en)
KR (1) KR870001035A (en)
CN (1) CN86104485A (en)
AT (1) ATE43294T1 (en)
AU (1) AU6012786A (en)
BR (1) BR8603421A (en)
CA (1) CA1256316A (en)
DD (1) DD248546A5 (en)
DE (1) DE3663480D1 (en)
DK (1) DK277186A (en)
ES (2) ES556604A1 (en)
FI (1) FI863052A (en)
IN (1) IN167025B (en)
NO (1) NO863006L (en)
SU (1) SU1473702A3 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3727115A1 (en) * 1987-08-14 1989-02-23 Basf Ag DEVICE FOR CLOSING THE GAP BETWEEN THE ENDS OF A PRINTING PLATE CLAMPED ON A FORM CYLINDER
DE4140768C2 (en) * 1991-12-11 1994-08-18 Roland Man Druckmasch Offset printing form
DE4217793C1 (en) * 1992-05-29 1993-12-09 Roland Man Druckmasch Offset blanket and process for its manufacture
US5755921A (en) * 1995-08-11 1998-05-26 Fargo Electronics, Inc. Image transfer press
US5687647A (en) * 1996-04-26 1997-11-18 Heidelberger Druckmaschinen Ag Plate cylinder with fixed tensioning plate mounting device
US6117615A (en) * 1999-07-28 2000-09-12 E. I. Du Pont De Nemours And Company Method for mounting multiple printing elements onto a cylindrical element
US8349114B2 (en) * 2005-02-28 2013-01-08 Cary Green Mug wrap

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2229133A (en) * 1938-12-27 1941-01-21 Rotary Printing Company Apparatus for printing
US2649132A (en) * 1950-08-28 1953-08-18 Harry B Barrett Brake shoe bonding machine
US2941570A (en) * 1955-11-29 1960-06-21 Oscar V Plym Method and apparatus for making tubes and hollow bodies of fibrous plastics
US2948327A (en) * 1957-06-20 1960-08-09 Hoe & Co R Apparatus for formation of composite printing plates
US2982332A (en) * 1958-08-27 1961-05-02 Russell U Garrett Apparatus for shaping and bonding laminations
US3288982A (en) * 1964-03-14 1966-11-29 Suzuki Haruyoshi High speed arc welding method
GB1504524A (en) * 1975-05-06 1978-03-22 Bicc Ltd Jointing or terminating plastics sheathed electric cables
US4104961A (en) * 1977-04-29 1978-08-08 Leonard Friedman Brake shoe lining bonding fixture
CH619646A5 (en) * 1977-05-09 1980-10-15 De La Rue Giori Sa
DK159251C (en) * 1983-03-12 1991-02-18 Basf Ag PROCEDURE FOR CLOSING THE SPACE BETWEEN A END OF THE PRESSURE PRESSURE CYLINDER OPENING THE END OF THE PRESSURE PRESSURE Cylinder, AND THE FITTING OF THE DEPTH PRESSURE DEVICE
DE3421029C2 (en) * 1984-06-06 1986-04-24 Walter Steinhausen Mathis Method and device for dry printing on a workpiece using a hot stamping foil

Also Published As

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IN167025B (en) 1990-08-18
JPS6228247A (en) 1987-02-06
DK277186D0 (en) 1986-06-12
BR8603421A (en) 1987-03-04
AU6012786A (en) 1987-01-29
ES296528Y (en) 1988-04-16
FI863052A0 (en) 1986-07-25
ATE43294T1 (en) 1989-06-15
KR870001035A (en) 1987-03-11
NO863006L (en) 1987-01-27
EP0211450A1 (en) 1987-02-25
ES296528U (en) 1987-10-16
US4762064A (en) 1988-08-09
US4680067A (en) 1987-07-14
SU1473702A3 (en) 1989-04-15
DD248546A5 (en) 1987-08-12
JPH0566263B2 (en) 1993-09-21
ES556604A1 (en) 1987-11-01
NO863006D0 (en) 1986-07-25
DE3663480D1 (en) 1989-06-29
DK277186A (en) 1987-01-27
CN86104485A (en) 1987-02-11
FI863052A (en) 1987-01-27
CA1256316A (en) 1989-06-27

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