EP2314386B1 - Dispositif et procédé de revêtement - Google Patents

Dispositif et procédé de revêtement Download PDF

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Publication number
EP2314386B1
EP2314386B1 EP10187885.8A EP10187885A EP2314386B1 EP 2314386 B1 EP2314386 B1 EP 2314386B1 EP 10187885 A EP10187885 A EP 10187885A EP 2314386 B1 EP2314386 B1 EP 2314386B1
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EP
European Patent Office
Prior art keywords
cylinder
magnetic
substrate
printing
coating
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.)
Revoked
Application number
EP10187885.8A
Other languages
German (de)
English (en)
Other versions
EP2314386A1 (fr
Inventor
Rainer Gebhardt
Sarayut Leeratanaphanit
Peter Clauter
Thomas GÖTZ
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Manroland Sheetfed GmbH
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Manroland Sheetfed GmbH
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Filing date
Publication date
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Application filed by Manroland Sheetfed GmbH filed Critical Manroland Sheetfed GmbH
Publication of EP2314386A1 publication Critical patent/EP2314386A1/fr
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Revoked legal-status Critical Current
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Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F7/00—Signs, name or number plates, letters, numerals, or symbols; Panels or boards
    • G09F7/02—Signs, plates, panels or boards using readily-detachable elements bearing or forming symbols
    • G09F7/04—Signs, plates, panels or boards using readily-detachable elements bearing or forming symbols the elements being secured or adapted to be secured by magnetic means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/20—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by magnetic fields
    • B05D3/207—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by magnetic fields post-treatment by magnetic fields
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B05D5/06—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain multicolour or other optical effects
    • B05D5/065—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain multicolour or other optical effects having colour interferences or colour shifts or opalescent looking, flip-flop, two tones
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F19/00—Apparatus or machines for carrying out printing operations combined with other operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/005—Colour cards; Painting supports; Latent or hidden images, e.g. for games; Time delayed images
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B42D25/29—Securities; Bank notes
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G19/00—Processes using magnetic patterns; Apparatus therefor, i.e. magnetography
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2252/00—Sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2601/00—Inorganic fillers
    • B05D2601/02—Inorganic fillers used for pigmentation effect, e.g. metallic effect
    • B42D2033/16—

Definitions

  • the invention relates to a method and associated apparatus for producing optically visible or invisible effects in a coating.
  • An applied in offset, flexo, gravure or screen printing or inkjet coating (dispersion or UV) is before complete drying or curing exposed to a magnetic field, so that the pigments contained are individually aligned. In this way, optical effects are achieved and / or transmitted information.
  • the above-mentioned methods can be combined in any order with the known printing methods, for example by offset printing and flexo lacquer coating, both inline and offline.
  • the method can be applied to sheetfed and web presses.
  • soft iron pigments which can orient themselves by the action of a magnetic field in a medium.
  • the application in printing inks and lacquers is listed as a possible field of application.
  • Another embodiment of magnetizable iron effect pigments is described, which are suitable for use in paints and printing inks.
  • pigments and blacks are shown for use in lithographic printing inks.
  • pearlescent pearlescent pigments are described which have magnetic properties.
  • DE 43 40 141 describes magnetizable luster pigments for printing ink and lacquers based on coated non-ferromagnetic, metallic substances with a ferromagnetic layer.
  • a device for magnetically transferring characters such as a design or an image onto a wet coating applied to a sheet or web includes at least one type of magnetic or magnetizable particles, and the device includes a body of permanent magnetic material.
  • the magnetic material is permanently magnetized in a direction substantially perpendicular to the surface of the body.
  • the surface of the body carries signs in the form of indentations, causing disturbances of its magnetic field.
  • the body is mounted either as a flat or cylindrically curved plate and on a rotatable cylinder on a printing machine.
  • a painted product having a desired pattern formed thereon contains a body; a lacquer layer, which lies on a surface of the body, wherein the lacquer layer consists of a transparent lacquer medium.
  • the medium is mixed with magnetic non-spherical particles and fixed therein.
  • a pattern is defined by a portion of the lacquer layer in which the particles have a predetermined orientation that alters the transparency.
  • the particles in the lacquer layer are present in an amount and are oriented so that a maximum cross-sectional area of the particles is arranged substantially parallel to the surface of the lacquer layer or inclined or perpendicular to the surface. This variation results in a pattern with three-dimensional appearance and is stably visible on the surface of the body.
  • a coating composition for producing a magnetically induced image which is defined by a ratio of an ink content to magnetically orientable interference pigments of greater than 3 to 5.
  • the inks are called flexographic, gravure, screen or inks.
  • a method of producing color effect images wherein color effect images are produced on a carrier substrate.
  • a carrier substrate with a decorative layer applied thereon is then guided past non-spherical, preferably acicular or platelet-shaped magnetic, color effect pigments.
  • This color effect pigments of the decorative layer changed by the generated by the magnetic pixels of the magnetizable printing form field line image in its orientation to the carrier substrate.
  • An apparatus for carrying out the method produces a multilayer body that can be produced thereby.
  • a method and apparatus for orienting magnetic flakes to produce optical effects in a substrate such as ink.
  • a magnetized cylinder with permanently installed magnetic elements is associated with a coated substrate.
  • the magnetic elements act from the magnetization cylinder in the arrangement specified there from the rear side of the substrate to the magnetically influenceable coating of the substrate.
  • an apparatus and method for magnetically transferring features into a coating on a substrate For magnetic imagewise influencing of a coating, a further intermediate layer is provided in addition to a magnetizable plate, which has a cutout pattern corresponding to the image to be generated.
  • the object of the invention is to improve an economical method and associated devices according to the preamble of claim 1 for economical use within printing presses.
  • the present invention utilizes a writable magnetic printing form to produce an image in a coating of lacquer enriched with ferromagnetic pigments.
  • the basis here are elements with ferromagnetic properties that can be aligned by an external magnetic field.
  • action elements can be imaged outside a printing press in a suitable device under the influence of suitable magnetic fields.
  • the action elements within the printing machine are imaged under the influence of suitable magnetic fields.
  • the action elements are designed as controllable magnetic devices arranged in the printing machine of the coated surface to be influenced.
  • the printed product is influenced by the magnetic field for the time of transport in the region of the magnetic field.
  • a stationary mounted electromagnets result in significantly shorter exposure times.
  • the imaging can take place as in a conventional pressure plate.
  • the film is clamped on a rubber or printing cylinder for imaging.
  • the magnetic image is deleted again and it can be a new orientation or imprinting of a magnetic field.
  • a magnetically writable endless belt can be passed through the printing unit similar to the film transfer arrangement, wherein the endless belt is individually imaged on a clear and write head.
  • an active element is also conceivable, wherein in a carrier film, a grid of magnetic elements is embedded, which are used for individual image design.
  • the imaging can be linked with the workflow of the prepress to the printing press to match the image information.
  • a targeted disturbance of the induced magnetic field may be possible.
  • image information is generated by redirecting or disturbing the magnetic field lines in the overlying paint coating by the cover.
  • a targeted disruption of the magnetic field induced by the substrate may be possible.
  • a homogeneous from the machine side magnetic field is due to the application of foil on the substrate a Image information generated by diversion or disturbance of the magnetic field lines in the overlying paint coating.
  • optical three-dimensional effects are not only decorative, but create a unique structure that is adjustable only at great expense. As a result, a counterfeit protection is achieved, which is inexpensive and at the same decorative nature.
  • the effect presupposes that the particles or pigments are still freely movable in the medium, therefore it makes sense to have the pigment and / or particle distribution influenced by the magnetic field as directly as possible after application of the printing ink or varnish.
  • the application is carried out with a coating unit, since with this higher layer thicknesses than with an offset printing unit can be transferred to the substrate.
  • the magnetizable pigments and / or particles can move and orient much easier in the rule.
  • Another aspect that speaks for the application of paints containing therein magnetizable pigments and particles is that with an offset printing unit only relatively small pigments and / or particles can be printed.
  • the range of processable pigment and / or particle sizes are significantly greater in a coating unit, which is preferably equipped with a chamber doctor blade and an anilox roller, compared to the application via an offset printing unit.
  • the selection of the medium in which the magnetizable pigments and / or particles are embedded also influences the expression of the effect. While in the conventional, oil-based printing inks, a substantial proportion of the drying process takes place via the removal of binder components in the printing substrate, the curing of so-called UV inks or other radiation-curing inks or varnishes takes place only after passing through a curing device. The removal of conventional printing inks usually occurs spontaneously after the application of the printing ink to an absorbent substrate. This is disadvantageous for the method described here for producing optically effective effects, since the path-impacting process reduces the layer thickness and, associated therewith, the mobility of the magnetic pigments and / or particles.
  • the applied layer thickness is indeed generally higher than the typical transmitted in an offset printing layer thickness, but on the other hand, these aqueous coatings containing a large proportion of water as a solvent that particularly easy and fast in an absorbent Can reject printing material.
  • UV paints or other radiation-curing paints offer a good alternative, since the paint layer on at least for the most part the printing material rests and thus the mobility of the magnetic particles and / or pigments is optimally given.
  • Another advantage of the radiation-curing inks and varnishes is that once a distribution pattern of the magnetic particles and / or magnetic pigments radiation exposure in a curing device, for example by a UV dryer, can be frozen relatively spontaneously.
  • active elements such as films, sheets, plates or strips, which are provided with ferromagnetic properties. These properties can be formed over the full surface or partially via an active element.
  • the ferromagnetic property can be formed offline and inline by an external magnetic field and aligned specifically, so that virtually a caption of the magnetizable active element takes place.
  • Essential for efficient action to align the magnetizable pigments or particles in the paint is that the magnetic field lines close in the region of the coating on the printed sheet. This is best given by the chosen performance as a magnetized thin plate or foil (see FIG. 1 ). In this arrangement, the magnetizable pigments or particles are deflected to a very great extent from the normal orientation and thus give the desired optical effect in a particularly favorable manner.
  • the printed product is exposed to a magnetic influence in the range of its magnetic field for the time of transport to the contact element.
  • a magnetic influence in the range of its magnetic field for the time of transport to the contact element.
  • the magnetic field of a clamping element spanned on the impression cylinder influence the paint layer of the printing sheet resting there.
  • the imaging can also take place outside the machine, such as, for example, in a printing plate conventionally used in printing presses.
  • the magnetic film is clamped for imaging on form, plate, rubber or impression cylinder.
  • the application on sheet leading impression cylinder since there the exposure time is the longest.
  • the magnetic image on the magnetic film can be erased again and it can be a new orientation or an imprint of a differently structured magnetic field.
  • a magnetically writable tape can be passed through the printing unit.
  • a device in the manner of a film transfer arrangement can be used in a sheet-fed press.
  • an endless belt with magnetic properties is used instead of a transfer film web.
  • This endless belt can be guided past a delete and write head, which inline and running the individual imaging with magnetic effects in the desired patterning - possibly designed to be variable - executes.
  • an active element is also conceivable: In a carrier film, a grid of magnetic elements is inserted, which can be used for individual image design - depending on the control, this can be done in relation to individual sheets or on print jobs.
  • the imaging can be linked with the workflow of a preliminary stage or the printing press in order to match the image information of the printed images and the coating patterns to be produced.
  • a targeted disturbance of the induced magnetic field is possible by a combination with a film transfer device in the printing press by partially applying ferromagnetic film regions from a transfer film.
  • This image information is generated in the paint in combination with the use of a homogeneous and fixed in the printing machine magnetic field by the transfer film order. This results from a diversion or disturbance of the magnetic field lines on the film pattern.
  • magnetizable elements As devices for generating a magnetic field, all types of known magnetizable elements can be used.
  • One possible embodiment could be plates similar to printing plates or blankets, trays as curved plates or films that can be taken in the printing or coating units in holding devices All conceivable designs are possible, which are suitable for producing an effect structure.
  • the magnetizable elements must be taken in a holding device so that the main direction of the magnetic field is directed against the substrate.
  • the magnetic elements could be clamped or glued onto the impression cylinder in a printing unit or in a transfer module, ie the magnetic force would act on the layer located thereon through the back of the sheet.
  • This approach can be realized by, for example, mounting a plate on the impression cylinder, which has magnetized and non-magnetized regions.
  • the plates are clamped at a double-sized cylinder on both halves of the cylinder and the two patterns would have to be made to fit. As a result, an increased set-up time is expected.
  • the maximum magnetic force is limited because the height of the magnet is limited by the often low undercut of the impression cylinder.
  • the air gap between the site of action of the magnet and the layer to be influenced in the carton printing is very high large, as the substrate is between the magnet and the sighting. Nevertheless, this method would be quite suitable for thin substrate, for example for label printing, since the long wrap angle, the exposure time is very long and thus the low magnetic force could be compensated quite.
  • the impression cylinder or a plate located thereon could consist of a magnetizable material.
  • the advantage of the long contact time due to the long wrap angle could well be realized without the fact that superstructures on the impression cylinder would interfere with the sheet travel due to magnets.
  • the magnetization of the impression cylinder or on a counter-pressure cylinder plate could be done by electromagnets, permanent magnets or by another device that can generate a magnetic field.
  • the effect of the invention can also be generated indirectly by the magnetizable elements against the printing plate in a coating unit or the Blanket or printing plate of an offset printing unit to be addressed.
  • the orientation of the pigments and / or the particles in this case takes place on the printing form or the blanket before the lacquer or printing ink layer comes into contact with the printing material.
  • a layer is applied by the magnetic or magnetizable pigments and / or particles are already structured in a structured by the action of a magnetic field.
  • the magnetic influence of the layer could also allow the transmission of data information.
  • the effect of the ordered magnetizable or magnetic pigments or particles would not even have to be visible, i. the particles or pigments could be embedded in a printing ink and be there after exposure to a magnetic field in an ordered structure containing information.
  • these could be line information of different complexity, but also letters or other information-bearing codes. This would allow a complete tracking of a package, because ultimately each package could be provided with a different code. At least every edition could be given an individual code. The code could later, even if it is not visually visible, read with appropriate readers.
  • the information-carrying code is introduced by means of a magnetic head or other type of magnetic device in the fresh, undried ink or paint by the magnetizable or magnetic particles be arranged by a magnetic field according to the information code and the paint or the paint then dried by physical and / or chemical means, with or without the action of a drying device.
  • This method has the advantage that once a code introduced by the drying process fixed and can not be changed later by manipulation.
  • Another advantage for the indirect production of structures and patterns in the present ink or varnish film is that the ink or varnish film is available in a higher thickness than on the substrate and thus gives better mobility of the pigments and / or particles is. Of the printing form, only a portion of the layer present there is transferred to the substrate during the nip process. Another advantage of the indirect method is also due to the fact that still no strike-breaking process has taken place in the direct method (action of the magnetic field on the substrate located on the substrate) begins almost suddenly in aqueous systems and printing inks. The consequent reduction of the layer thickness limits the mobility of the pigments and / or particles. On the printing form or the blanket no components of the printing ink or varnish can knock off, so that there is always the full layer thickness and thus maximum mobility is guaranteed.
  • FIG. 1 is the principle for the action of a static magnetic field for the alignment of magnetizable pigments 2 or particles in a freshly applied paint layer L shown on a substrate.
  • a magnetic image 1 is embedded as a permanent magnet or electromagnet 3 in a magnetizable plate 4 and here shows a magnetic polarity with a north pole N and a south pole S. Between the magnetic poles, closed magnetic field lines 5 propagate.
  • a substrate B is placed on the magnetizable plate 4.
  • a layer L of a lacquer equipped with magnetizable pigments 2 and / or particles is applied. The arrangement is chosen such that the magnetic field lines 5 close in the region of the layer L which is applied to the printing substrate B.
  • the magnetizable plate 4 may be a thin plate or so may be formed as a film.
  • the printing substrate 4 is exposed in the manner shown above for the time of transport to the magnetized plate 4 the action of the magnetic field and the pigments 2 or particles in the paint can align along the field lines 5 ,
  • FIG. 2 the principle is extended to a static imagewise magnetization.
  • a magnetic image 1 is embedded as a permanent magnet or electromagnet 3 in a magnetizable plate 4 and here shows a more detailed magnetic polarity with several alternately arranged north N and south poles S. Between the alternating magnetic poles now many each closed magnetic field lines 5 from.
  • a layer L of a ferromagnetic lacquer coated with pigments 2 and / or particles is again applied to the printing material B applied to the magnetizable plate 4.
  • the arrangement is also chosen so that the magnetic field lines 5 close in the region of the layer L on the substrate B.
  • the shape of the magnetized image in the plate 4 shown here produces the displacement of pigments 2 or particles shown in the layer L, which shows more details here than in the arrangement in FIG Fig. 1 ,
  • optical effects can be achieved, which contain images, graphic elements, data or codes.
  • the magnetizable plate 4 may also be designed as a thin plate or film for this purpose.
  • a magnetization outside the printing press as a preparatory measure for the coating process in question.
  • a magnetization device assigns a magnetization device to the respective cylinder carrying the magnetizable plate 4 (for example, correspondingly executable as in FIG Fig. 4 ). Then the magnetization can take place as an automatic setup measure during the setup of the printing press. Likewise, the magnetization can be refreshed during the printing process or during print interruptions.
  • FIG. 3 the principle of imagewise magnetization is extended as an indirectly executable process.
  • the magnetization of permanent or electromagnets 3 in the magnetizable plate 4, referred to as magnetic image 1, is to be understood here as a statically present and areally homogeneous magnetization. Therefore, here shows a small-scale magnetic polarity with many alternately arranged north N and south poles S, which extends over the entire plate 4 in a uniform distribution. Spread between the alternating magnetic poles There are many magnetic field lines 5.1, each closed by a short path.
  • an intermediate layer 6 of ferromagnetic material is now placed on the magnetizable plate 4. In this intermediate layer 6, a magnetization is again induced, which is oriented at its outer edges.
  • the arrangement is also chosen so that the magnetic field lines 5 close in the region of the layer L on the substrate B.
  • the magnetizable plate 4 may also be designed as a thin plate or film for this purpose.
  • the intermediate layer 6 may be formed of magnetizable material as a thin plate or foil.
  • Fig. 3 allows a comparatively easy handling.
  • a permanent and flat, homogeneously magnetized plate 4 is clamped here.
  • the magnetic image prefabricated intermediate layer 6, which should consist of magnetizable material are placed on the plate 4, where it then adheres independently.
  • the transfer of the magnetically induced image into the lacquer layer L then takes place without further support measures.
  • the liners are easy to prepare and easy to install on the plate 4 and position.
  • metallic layers are applied in image form from a transfer film to a printing material printed with an adhesive image.
  • the adhesive printing takes place in a first printing unit in any mass printing process.
  • a subordinate coating unit sheet-fed printing unit, coating unit, coating module
  • the metallized image is transferred to the adhesive area by applying the transfer film to the printing material under pressure.
  • the transfer film only the necessary parts of the metal layer are removed in the area of the adhesive image. For example, a metallic picture was created on the substrate.
  • a plate 4 homogeneously magnetized as mentioned above can also be used here in order to introduce magnetically induced image effects.
  • the magnetic field is then transformed into a magnetic image by means of the metal layers applied to the printing substrate so that the pigments 2 or particles are deflected directly in the overlying lacquer layer L and cause optical effects corresponding to the metal image.
  • the optical effects of the metal image complement those of the pigment deflection in the paint layer L on the substrate B.
  • FIGS. 1 to 3 are provided on bow-leading cylinders or devices with fixed cylindrical surfaces associated with one or more gripper assemblies. By means of grippers, printed sheets are held and transported in a sheet transport direction.
  • such cylinders can be used for the arrangement in a coating module for a simultaneous application of the lacquer layer L upstream of the magnetization. Or such cylinders are arranged in a treatment module which is directly downstream of a printing unit or paint module producing the paint layer L.
  • FIG. 4 The principle of imagewise magnetization is shown again as a directly executable process, which, however, is characterized by a dynamic - ie not static - magnetization, extended.
  • a bow leading cylinder Z indicated by drawing as it is known by default in sheetfed presses.
  • Sheet leading cylinders Z in sheetfed presses are provided with fixed cylindrical surfaces associated with one or more gripper assemblies. These can be impression cylinders or bow guide drums.
  • grippers By means of the grippers, printing sheets of the printing material B to be processed are held on the cylinder surface and transported in the sheet transport direction R.
  • the cylinder Z indicated here is provided for the arrangement in a coating module for the application of varnish or in a module downstream of the coating module.
  • the magnetization representing a magnetic image is generated here completely with electromagnets 3 which are arranged in magnetization heads 7.
  • the magnetizing heads 7 are arranged equidistantly above the surface of the cylinder 7 in a raster arranged over the entire width and over parts or the entire circumference of the cylinder Z, in accordance with the need for imaging.
  • a magnetizable pad can be provided as a plate 4.1.
  • the printing material B is guided with the lacquer layer L and the pigments 2 and / or particles contained therein.
  • a corresponding magnetizing pulse is controlled in accordance with the curve 8 by all magnetizing heads 7 synchronously with the movement of the printing material B.
  • fine or coarse optical patterns or areal displacements of the pigments 2 and / or particles can be produced in the lacquer layer L.
  • a magnetizable thin plate 4.1 or foil on the cylinder Z can support the magnetization effect by the dynamic magnetization is reflected there and enhances the dynamic effect.
  • Fig. 4 the assignment of a dryer T after the treatment station is represented by the magnetization.
  • the dryer T With the dryer T, the previously prepared displacement of the pigments 2 and / or particles in the lacquer layer (L) can be frozen by rapid curing of the lacquer layer (L). Thus, he desired optical effect in the lacquer layer (L) is recorded.
  • An arrangement of magnetizing heads 7 accordingly Fig. 4 is also suitable for erasing and rewriting a magnetization image on a plate 4, if this according to the arrangement Fig. 2 is used to form a static magnetization image.
  • the optically visible or invisible effect in the lacquer layer L is due to an action of the magnetic field generated by the magnetizing heads 7 or a magnetizable plate 4 on magnetically or magnetizable formed pigments 2 and / or particles within a printing ink or a lacquer before these are applied as a layer L on the substrate B.
  • the magnetization heads 7 or a magnetizable Plate 4 may be arranged on or opposite to a surface of a cylinder carrying the coating medium. This arrangement requires a very rapid curing, since the displacement of the pigments 2 and / or particles can be disturbed in the coating.
  • the arrangement has the advantage that the dryer is arranged very close to the coating position and thus also positioned very quickly acting.
  • the optical effect or the image pattern can be generated on the corresponding cylinder before the layer L present on the corresponding cylinder is applied directly or indirectly to the printing material B.

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Claims (5)

  1. Procédé de création d'un effet ou motif optiquement visible ou invisible dans un revêtement (L) qui contient des pigments magnétiques et/ou magnétisables (2) et/ou des particules en répartition approximativement régulière et qui a été appliqué à l'aide d'une machine d'impression rotative comportant une unité d'impression à haute pression, impression par héliogravure ou impression offset sur un support d'impression (B), l'effet ou motif optiquement visible ou invisible étant obtenu par action d'un champ magnétique sur les pigments magnétiques ou magnétisables (2) et/ou des particules dans le revêtement (L) qui a été appliqué sur le support d'impression (B) et y étant présent dans un état en grande partie non séché ou non durci pendant le passage dans la machine et le motif ou l'effet étant fixé après l'action du champ magnétique dans le revêtement par un séchage ou une irradiation, le champ magnétique étant généré par au moins un élément variablement magnétisable (3 ; 6 ; 7),
    caractérisé en ce que,
    sur le support d'impression (B) qui est pourvu facultativement d'un revêtement graphique, une couche de vernis (L) contenant des pigments magnétisables (2) et/ou des particules est appliquée et que le support d'impression (B) est guidé sur un cylindre de guidage de feuilles (Z) dans le secteur d'au moins un élément magnétisable sous contrôle (3, 7) de manière à ce que la force magnétique émanant sous contrôle de l'élément magnétisable (3, 7) agisse directement sur le revêtement (L) plaqué sur le support d'impression (B) pendant le transport du support d'impression revêtu (B).
  2. Procédé selon la revendication 1,
    caractérisé en ce que
    l'au moins un autre élément passivement magnétisable (4, 1) est monté sur le cylindre de guidage de feuilles (Z) comme un cylindre de guidage de feuilles, de transfert ou de contre-pression de dimension simple ou de dimension double d'une unité d'impression ou d'une unité de vernissage, de telle sorte que la force magnétique émanant des éléments magnétisables sous contrôle agisse à travers le support d'impression et le revêtement (L) sur l'élément passivement magnétisable.
  3. Procédé selon la revendication 1 ou 2,
    caractérisé en ce que
    le motif porte une information visuelle ou détectable par un lecteur adapté et qui se présente sous forme d'une image ou d'un motif ou d'un logo ou d'un code barre ou d'un texte composé de lettres et/ou de chiffres.
  4. Dispositif de réalisation du procédé selon la revendication 1 dans une machine d'impression traitant des feuilles et comportant une ou plusieurs unités d'impression avec un cylindre de contre-pression, un cylindre porte-blanchet et un cylindre porte-plaque et au moins un module de vernissage comprenant un cylindre de contre-pression et un cylindre porte-cliché, au moins un élément magnétisable se présentant sous forme de plaque (4.1) ou de film présentant une magnétisation appliquée de manière ciblée et représentant un motif ou destiné à y appliquer une magnétisation représentant un motif étant appliqué sur un cylindre de guidage de feuilles (Z) qui est un cylindre de contre-pression ou un cylindre porte-blanchet ou un cylindre porte-plaque d'une unité d'impression ou un cylindre de contre-pression ou un cylindre porte-cliché d'un module de vernissage, la magnétisation de la plaque (4.1) agissant sur le support d'impression (B) à revêtir de manière à ce qu'une couche (L) pourvue de pigments magnétiques ou magnétisables (2) et/ou de particules d'une substance de revêtement soit transformée sur le support d'impression (B) suivant la magnétisation représentant le motif de la plaque (4),
    caractérisé en ce que
    l'au moins un élément magnétisable sous contrôle permettant de générer une magnétisation représentant un motif est associé en face à face à un cylindre de guidage de feuilles (Z) qui est un cylindre de contre-pression ou un cylindre porte-blanchet ou un cylindre porte-plaque d'une unité d'impression ou un cylindre de contre-pression ou un cylindre -porte-cliché d'un module de vernissage.
  5. Dispositif selon la revendication 4,
    caractérisé en ce
    qu'une ou plusieurs têtes de magnétisation (3, 7) de la surface de guidage de feuilles sont
    associées en face à face au cylindre (Z), les têtes de magnétisation (3, 7) étant disposées de préférence en forme de trame sur la largeur et la circonférence en fonction de la surface à magnétiser et étant pourvues d'une commande de manière à pouvoir être commandées en synchronisme avec le mouvement du support d'impression sur le cylindre (Z) dans un sens de transport des feuilles (R).
EP10187885.8A 2009-10-22 2010-10-18 Dispositif et procédé de revêtement Revoked EP2314386B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009050389 2009-10-22
DE102010041398A DE102010041398A1 (de) 2009-10-22 2010-09-27 Einrichtung und Verfahren zum Beschichten

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EP2314386A1 EP2314386A1 (fr) 2011-04-27
EP2314386B1 true EP2314386B1 (fr) 2014-08-20

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CN102825903B (zh) * 2012-08-03 2015-06-17 惠州市华阳光学技术有限公司 磁性印刷设备及磁性印刷方法
DE102013015277B4 (de) 2013-09-16 2016-02-11 Schwarz Druck GmbH Orientierung magnetisch orientierbarer Partikel in einer Farbe mit mehreren einander überlagerten Magnetfeldern
DE102015121812B4 (de) 2015-12-15 2017-11-02 Bogen Electronic Gmbh Gegenstand, Verfahren zum Herstellen des Gegenstands und Verfahren zum Bestimmen einer Position des Gegenstands
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DE102017202747B3 (de) 2017-02-21 2018-08-16 Koenig & Bauer Ag Verfahren zur Bearbeitung von Bedruckstoffbogen bei der Herstellung von Wertpapieren sowie Wertpapierdruckmaschine
DE102020125728B3 (de) 2020-10-01 2022-04-07 Koenig & Bauer Ag Vorrichtung zum Ausrichten von magnetischen oder magnetisierbaren Partikeln sowie Maschine zur Erzeugung optisch variabler Bildelemente
EP4178805B1 (fr) 2020-10-01 2024-05-29 Koenig & Bauer AG Machine pour générer des éléments d'image optiquement variables
DE102020125727B3 (de) 2020-10-01 2022-04-07 Koenig & Bauer Ag Vorrichtung zum Ausrichten von magnetischen oder magnetisierbaren Partikeln sowie Maschine zur Erzeugung optisch variabler Bildelemente
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