EP2237954A2 - Transfert de structures à imprimer et/ou à reproduire par estampage sur une feuille sans fin - Google Patents

Transfert de structures à imprimer et/ou à reproduire par estampage sur une feuille sans fin

Info

Publication number
EP2237954A2
EP2237954A2 EP08867569A EP08867569A EP2237954A2 EP 2237954 A2 EP2237954 A2 EP 2237954A2 EP 08867569 A EP08867569 A EP 08867569A EP 08867569 A EP08867569 A EP 08867569A EP 2237954 A2 EP2237954 A2 EP 2237954A2
Authority
EP
European Patent Office
Prior art keywords
film
endless film
printing
endless
embossing
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.)
Withdrawn
Application number
EP08867569A
Other languages
German (de)
English (en)
Inventor
Lars Hoffmann
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.)
Giesecke and Devrient GmbH
Original Assignee
Giesecke and Devrient GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Giesecke and Devrient GmbH filed Critical Giesecke and Devrient GmbH
Publication of EP2237954A2 publication Critical patent/EP2237954A2/fr
Withdrawn legal-status Critical Current

Links

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
    • B41F13/02—Conveying or guiding webs through presses or machines
    • 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
    • B41F19/02—Apparatus or machines for carrying out printing operations combined with other operations with embossing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/02—Registering, tensioning, smoothing or guiding webs transversely
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/50—Auxiliary process performed during handling process
    • B65H2301/51—Modifying a characteristic of handled material
    • B65H2301/512—Changing form of handled material
    • B65H2301/5126—Embossing, crimping or similar processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/15—Roller assembly, particular roller arrangement
    • B65H2404/152—Arrangement of roller on a movable frame
    • B65H2404/1521—Arrangement of roller on a movable frame rotating, pivoting or oscillating around an axis, e.g. parallel to the roller axis
    • B65H2404/15212—Arrangement of roller on a movable frame rotating, pivoting or oscillating around an axis, e.g. parallel to the roller axis rotating, pivoting or oscillating around an axis perpendicular to the roller axis

Definitions

  • the invention relates to a device and a method for transferring printing and / or embossing structures to a security element with a printing or embossing cylinder and an impression cylinder.
  • the security element consists of at least one substrate in the form of an at least partially translucent endless film, wherein the endless film passes between the printing or embossing cylinder and the impression cylinder.
  • printing methods such as Gravure printing, offset printing, high-pressure and rotary screen printing work with a printing or embossing unit consisting of a printing or embossing cylinder and an impression cylinder, which is also referred to as impression roller.
  • the substrate to be printed is passed between the printing or embossing cylinder and the impression cylinder.
  • an ink application or an embossed structure is transferred to the substrate by the mechanical pressure between the two cylinders.
  • intaglio printing a special form of intaglio printing, a combination of printing and embossing is also possible because, in this printing process, the enormous pressure between the impression cylinder and the impression cylinder is not only applied to the substrate but also to the substrate in this area is deformed.
  • the color application and the embossing are arranged congruently.
  • the substrate can be fed to the printing or embossing unit in individual sheets, which are stacked on a stack.
  • the substrate may be wound up as a quasi-endless belt on a roll.
  • this endless belt is referred to as an endless film.
  • the endless film thus has, in contrast to an arcuate film to a length which is substantially greater than its width. N / A- According to the invention, an endless film is not infinite, but finally long, but it is so long that it is wound onto the roll for transport and processing purposes.
  • Such endless films are used in the production of security elements for value or security documents, such as banknotes, identity cards, passports, certificates, credit or debit cards.
  • the continuous film is printed and / or embossed, possibly provided with further lacquer or plastic layers and applied to a substrate or introduced into a substrate.
  • This substrate consists in particular of paper.
  • DE 10 2005 062132 A1 discloses a security element in the form of threads and films for security papers, documents of value and the like, which has a micro-optical moire magnification arrangement.
  • This moiré magnification arrangement consists of a motif image over which microfocusing elements are located.
  • the motif image consists of a periodic or at least locally periodic arrangement of micromotif elements with motif heights and subject distances of 10 ⁇ m to 40 ⁇ m.
  • the microfocusing elements are also arranged periodically or at least locally periodically.
  • the micromotif elements are located in the focal plane of the microfocusing elements. Both elements are arranged in a controlled grid. Through a targeted tilting of the two grids to each other creates a magnification effect. The set tilt angle determines the magnification.
  • the motif image is printed or embossed on a substrate, which preferably consists of a at least partially translucent film consists.
  • the microfocusing elements are embossed on the second side of the film into a lacquer layer.
  • the carrier film of the microstructure elements and the microfocusing elements forms the spacer which sets the microstructure elements in the focal plane of the microfocusing elements so as to produce a sharp image.
  • the desired magnification effect sets.
  • the grid width of the microfocusing elements and the motif image and the angular position of the major axes of the planes of both arrays are adjusted to each other, the offset between the major axes is only in a very narrow range of 0.1 ° to 0.5 °.
  • the position of the major axes of the two planes to each other must be kept exactly at a precisely defined angle throughout the process of manufacturing the security element.
  • an angle offset occurring during the production of the security element can undesirably shift the position of the two planes relative to one another, for example align the planes which were previously inclined relative to one another in parallel so that the magnification and the direction of movement visible in the enlarged motif are changed.
  • Cause for this Deviations are inaccuracies in the production of the printing or embossing work for the microstructure elements and the microfocusing elements, as well as an undesired rotation of the support film when embossing the microfocusing elements or during film transport before the microstructure elements are impressed / impressed.
  • the invention has for its object to provide an apparatus and a method for the production of security elements, which solves the problems of the prior art.
  • At least one pivoting roller is arranged which overstretches the endless film to one side. This creates an oblique position of the endless film with respect to the axis of the printing cylinder or the embossing cylinder.
  • the advantage of the targeted tilting of the film is that the variations occurring in the production process deviations of the tilt angle of the microstructure element level and the mikussussusselementbene can be compensated.
  • this creates the possibility of canceling the deviations occurring during the production process of the printing or embossing roller by means of a fixed predetermined tilting of the pivoting roller.
  • a particular advantage of the invention is thus that in the production of the printing or embossing roller, the exact adjustment of the angular orientation can be omitted, since this is done only during the printing and / or embossing of the continuous film by means of the Einschwenkwalze. Deviations from the exact adjustment of the angular orientation of the microstructure array, the due to the small angle are inevitable, can be lifted. This increases the manufacturing tolerance in tool production.
  • a desired enlargement of the motives of the motif image can also be achieved by means of the swivel roller.
  • the printing or embossing rollers used have no tilting of the raster planes of the microstructure elements and the microfocusing elements. The tilting is achieved solely by the Einschwenkwalze.
  • the advantage of this method is, among other things, to produce different magnifications of the motifs of the motif image with one and the same printing or embossing machine, which would otherwise require a new or additional printing or embossing unit.
  • the microstructure elements are applied to the carrier film analogously to the direct printing, which is tilted specifically by the swivel roller during entry into the printing or embossing unit by elastic overstretching. This results in a tilting of the microstructure elements to the tapered film, which carries on the back of the Mikrofokussierimplantation.
  • the tilting serves, as described above, to adjust and readjust the magnification of the moiré magnification arrangement.
  • the embossing cylinder transmits embossing structures into the embossing lacquer layer.
  • This can be a thermoplastic embossing process or embossing in a radiation-crosslinking lacquer.
  • the hardening of the embossed structures preferably takes place in the region in which the endless film wraps around the printing or embossing cylinder, by means of electron beams or by means of UV radiation.
  • radiation-crosslinking lacquers for example, UV used curing paints, which are radically structured and provided with photoinitiators, and which are excited in the long-wave UV or short-wave visible range with wavelengths from 400 nm to 450 nm.
  • the Einschwenkwalze is skewed against the axis of the following printing or embossing cylinder, that the continuous film based on the film width has a lateral offset of 0.01% to 0.65%.
  • On a film width of 810 mm thus creates a lateral offset of 0.1 mm to 5 mm.
  • the inclination of the Einschwenkwalze is particularly preferably by the Einschwenkwalze is hinged or rotatably mounted at one end, for example by a folding or ball joint. At its other end the Einschwenkwalze is slidably mounted, this end is moved for example by a spindle, a hydraulic, pneumatic or a servomotor. Alternatively, it is also possible that the Einschwenkwalze is slidably mounted at both ends, so that can be any orientation of Einschwenkwalzen in space, based on the printing or embossing cylinder set. In this case, both ends are each moved by a spindle, a hydraulic, a pneumatic or a servomotor or another drive.
  • pivoting rollers can be arranged one behind the other.
  • the achievable tilting of the film can be increased.
  • the design of the swivel rollers is adapted with regard to the positioning possibilities, the reproducibility and the setting accuracy for the respective application with mechanical components and reading possibilities.
  • the setting is done with sufficient accuracy, for example via motor / hydraulic / pneumatic driven fine thread spindles or reciprocating pistons.
  • the positioning by the operator is to be made reproducible by a monitored feed of the actuator.
  • different tilting can thus be achieved with the same adjustment from the zero position, since the mechanical rigidity and the slippage of different films on the setting roller are different.
  • a particular advantage of the invention is thus that it is possible to respond specifically to an undesired and changing lateral offset in the endless film during the printing and / or embossing process.
  • active and / or passive control systems regulate the respective required expansion of the continuous film by adjusting the Einschwenkwalze.
  • micromotif elements of the motif image are in one of the aforementioned embodiments on the printing and / or embossing cylinder perpendicular to the axis s of the printing and / or embossing cylinder aligned.
  • a right-angled alignment of print motifs or micromotif elements corresponds to the commonly used standard in the production of embossing cylinders and gravure cylinders, so that it is possible with particular advantage to retain customary software programs and the customary procedure in the production of embossing cylinders. Thus adaptation errors due to otherwise necessary software changes or due to necessary mechanical tilting during recombining are avoided.
  • the endless film is wound in the direction of the endless film after the printing and / or embossing cylinder on a roll and fed to their further processing.
  • the endless film can be unwound again, cut into narrow threads and wound up again onto a roll.
  • the endless film can of course also be cut and stacked directly after the printing and / or embossing process, so that further processing as a film sheet is possible.
  • the viewing angles for the visual recognizability and the displacements of the views of the micromotif elements are matched to one another in such a way that, when the security element is tilted, a viewing angle substantially changes perpendicular to the tilt axis moving representation of the subject arises, which is referred to as Orthoparallaxe. It contradicts the usual movement behavior in three-dimensional space and therefore has a high attention and recognition value.
  • Advantage of the invention here is that this effect of Orthoparallaxe is not disturbed. Any remaining slight changes in the orientation of the direction of movement with respect to the tilt axis are hardly noticeable on the finished Moire magnification arrangement.
  • a representation of the motif which moves for the viewer when tilting the security element essentially parallel to the tilting axis is referred to as parallax.
  • the Moire Magnifier In the production of the Moire Magnifier by the overstretching of the endless film is an alignment of the ortho-parallax or the parallax between the periodic or locally periodic order of the microfocusing and the micromotif elements adjustable.
  • the embossing of the fine structures of the Moire Magnifier is not disturbed, as this is determined by the directly resting counter pressure roller, which prevents slippage of the endless film on the embossing tool.
  • the micromotif elements of this type have sizes of 5 .mu.m to 100 .mu.m, preferably they have a motif size of 15 .mu.m to 40 .mu.m.
  • the associated microfocusing elements are for example applied as spherical cylindrical lenses with a radius of curvature of 5 ⁇ m to 50 ⁇ m, preferably of 10 ⁇ m to 35 ⁇ m.
  • the described invention also allows the deliberate change of
  • the micromotif elements are arranged in the form of microscopic structures on a paper substrate or a second endless film. If the micromotif elements are arranged on a substrate made of a second endless foil, then the second endless foil as well as the first endless foil can be overstretched to one side. The overstretching of the second endless film also produces an inclination of the second endless film in relation to the running direction of the second endless film, wherein after the oblique position of the second endless film, the second Endless film is embossed and / or printed.
  • the second endless film is in this case overstretched by a corresponding further Einschwenkwalze with a tilting device, wherein the Einschwenkwalze the second endless film can be tilted depending on or independent of the Einschwenkwalze the first endless film.
  • the security element is particularly preferably a patch, a security foil or a thread for a security document, such as a banknote, a passport or a card.
  • a patch here is a label-shaped individual element which is applied to the surface of the substrate; a security film a film strip applied to the surface of the substrate; and a thread a foil strip disposed wholly or partially within the substrate.
  • Fig. 1 shows an embossing machine according to the invention with stamping tool and Einschwenkwalze and this in
  • FIG. 1a in a side view
  • Fig. Ib in plan view
  • Fig. 2 shows the operation of an embossing machine according to the invention and here in Fig. 2a with tilting of the Einschwenkwalze down
  • FIG. 1a shows a side view of an embossing machine with an embossing tool in the form of an embossing cylinder 3 and a swivel roller 4.
  • the embossing machine feeds an endless film 1 in the transport direction 2 via the swiveling roller 4 to the embossing cylinder 3.
  • a counter-pressure roller 5 the endless film 1 is pressed against the embossing cylinder 3 such that the structures to be embossed are imaged on the endless film 1.
  • the endless film 1 wraps around the embossing cylinder 3 in an angular range of about 230 °, wherein in this area a hardening of the endless film 1 takes place.
  • the endless film is irradiated with UV light, for example, so that the embossing lacquer applied to the foil is cured and thus the im Embossing mill transferred microstructure elements are frozen firmly in the embossing lacquer.
  • the endless film 1 is fed via a deflection roller for further processing.
  • the endless film 1 can be rewound onto a roll or cut to length or cut and stacked in the form of individual sheets.
  • the Einschwenkwalze 4 is shown in FIG. Ib on one side 7 rotatably or pivotally mounted.
  • the point 7 thus represents the joint around which the Einschwenkwalze 4 can be rotated or pivoted.
  • the Einschwenkwalze 4 is slidably suspended.
  • a hydraulic cylinder, a lever mechanism or a spindle acts on the suspension 8 and shifts it in any spatial directions, for example up or down.
  • Fig. 2b shows the initial state, i. the non-tilted pivoting roller 4, whose axis of rotation is thus parallel to the axis of rotation of the embossing cylinder 3.
  • Embossed structures 10, which are applied by the embossing cylinder 3 on the endless film 1, are aligned parallel to a print motif 9.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Printing Methods (AREA)
  • Credit Cards Or The Like (AREA)

Abstract

L'invention concerne un dispositif et un procédé de transfert de structures à imprimer et/ou à reproduire par estampage sur un élément de sécurité au moyen d'un cylindre d'impression ou d'estampage (3) et d'un cylindre de contre-pression (5). L'élément de sécurité se compose d'au moins un substrat sous la forme d'une feuille sans fin (1) transparente au moins par endroits, ladite feuille sans fin (1) circulant entre le cylindre d'impression ou d'estampage (3) et le cylindre de contre-pression (5). Selon l'invention, au moins un rouleau à basculement (4) est placé en amont du cylindre d'impression ou d'estampage (3) dans le sens de circulation de la feuille sans fin (1), lequel rouleau à basculement décale la feuille sans fin (1) vers un côté, de sorte que la feuille sans fin (1) est inclinée par rapport à l'axe du cylindre d'impression ou d'estampage (3).
EP08867569A 2007-12-27 2008-12-17 Transfert de structures à imprimer et/ou à reproduire par estampage sur une feuille sans fin Withdrawn EP2237954A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007063277A DE102007063277A1 (de) 2007-12-27 2007-12-27 Übertragen von Druck- und/oder Prägestrukturen auf eine Endlosfolie
PCT/EP2008/010745 WO2009083149A2 (fr) 2007-12-27 2008-12-17 Transfert de structures à imprimer et/ou à reproduire par estampage sur une feuille sans fin

Publications (1)

Publication Number Publication Date
EP2237954A2 true EP2237954A2 (fr) 2010-10-13

Family

ID=40690827

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08867569A Withdrawn EP2237954A2 (fr) 2007-12-27 2008-12-17 Transfert de structures à imprimer et/ou à reproduire par estampage sur une feuille sans fin

Country Status (4)

Country Link
US (1) US20110023734A1 (fr)
EP (1) EP2237954A2 (fr)
DE (1) DE102007063277A1 (fr)
WO (1) WO2009083149A2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008016795A1 (de) 2008-04-02 2009-10-08 Giesecke & Devrient Gmbh Verfahren zum Erzeugen einer mikrooptischen Moiré-Vergrößerungsanordnung
US20140072766A1 (en) * 2012-09-10 2014-03-13 BFCOS, Inc. Apparatus and methods for creating a wood grain appearance on sheet material
DE102013017797A1 (de) * 2013-10-25 2015-04-30 Giesecke & Devrient Gmbh Verfahren und Vorrichtung zum Herstellen eines Sicherheitselementes

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GB2036649A (en) * 1978-12-08 1980-07-02 Ditzel Gmbh Gebr Embossing in register with printing
US4404906A (en) * 1981-05-18 1983-09-20 Curran Thomas F System for controlling fan-out in a web offset press
DE3609090A1 (de) * 1986-03-18 1987-09-24 Gao Ges Automation Org Wertpapier mit darin eingelagertem sicherheitsfaden und verfahren zur herstellung derselben
IT1254836B (it) * 1992-03-23 1995-10-11 Giovanni Cerutti Off Mec Dispositivo per la messa a registro longitudinale e trasversale della banda di carta in una macchina da stampa rotativa
US5266995A (en) * 1992-08-12 1993-11-30 Quad/Tech, Inc. Method for forming a graphic image web
CH688137A5 (de) * 1994-05-20 1997-05-30 De La Rue Giori Sa Rotations-Rollendruckmaschine mit einer Registervorrichtung zum Ausrichten der Papierbahn.
DE29516392U1 (de) * 1995-10-17 1995-12-21 Erhardt & Leimer Gmbh Schwenklagerung für eine Korrekturwalze
WO1999038679A1 (fr) * 1998-01-30 1999-08-05 Springs Window Fashions Division, Inc. Dispositif et procede d'impression et d'estampage de substrats allonges
US6105899A (en) * 1999-01-07 2000-08-22 Visionary Solutions, Llc Web tension equalizing roll and tracking apparatus
DE19960649B4 (de) * 1999-12-16 2011-06-22 Goss Contiweb B.V. Vorrichtung zur Korrektur der lateralen Position einer Bedruckstoffbahn in einer Rollenrotationsdruckmaschine
DE10257374A1 (de) * 2002-01-04 2003-07-17 Heidelberger Druckmasch Ag Vorrichtung zur Korrektur der lateralen Postition einer Bedruckstoffbahn in einer Rollenrotationsdruckmaschine
DE10340569A1 (de) * 2003-09-01 2005-04-07 Koenig & Bauer Ag Verfahren zur Reduktion von Passerfehlern auf einer in einer bahnverarbeitenden Vorrichtung und ein Druckwerk
DE102005062132A1 (de) 2005-12-23 2007-07-05 Giesecke & Devrient Gmbh Sicherheitselement

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Title
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Also Published As

Publication number Publication date
WO2009083149A2 (fr) 2009-07-09
US20110023734A1 (en) 2011-02-03
WO2009083149A3 (fr) 2009-11-19
DE102007063277A1 (de) 2009-07-02

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