WO2011050956A1 - Procédé et dispositif pour fabriquer une bande de papier continue filigranée - Google Patents

Procédé et dispositif pour fabriquer une bande de papier continue filigranée Download PDF

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Publication number
WO2011050956A1
WO2011050956A1 PCT/EP2010/006579 EP2010006579W WO2011050956A1 WO 2011050956 A1 WO2011050956 A1 WO 2011050956A1 EP 2010006579 W EP2010006579 W EP 2010006579W WO 2011050956 A1 WO2011050956 A1 WO 2011050956A1
Authority
WO
WIPO (PCT)
Prior art keywords
marks
positions
paper web
generated
detected
Prior art date
Application number
PCT/EP2010/006579
Other languages
German (de)
English (en)
Inventor
Andreas Pretsch
Jürgen Ruck
André Gregarek
Bernd Oweger
Bernhard Wiedner
Manfred Heim
Helmut Müller
Original Assignee
Giesecke & 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 & Devrient Gmbh filed Critical Giesecke & Devrient Gmbh
Priority to EP10776943.2A priority Critical patent/EP2496504B1/fr
Priority to ES10776943T priority patent/ES2430090T3/es
Publication of WO2011050956A1 publication Critical patent/WO2011050956A1/fr

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/44—Watermarking devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2233/00—Arrangements for the operation of printing presses
    • B41P2233/50—Marks on printed material

Definitions

  • the invention relates to a method for producing an endless paper web with watermark marks and to an apparatus for carrying out such a method.
  • watermark marks are often created as tax stamps for further manufacturing steps.
  • the generation of watermark marks in the papermaking process is simple and inexpensive, the watermark marks are subject to a relatively large positional tolerance due to their production, which adversely affects the positional accuracy of the further processing steps.
  • the object of the invention is to provide a production method of the type mentioned above, in which subsequent processing steps can be carried out with greater accuracy.
  • a generic method comprises the method steps: a) producing an endless paper web on a rotary screening machine, the paper web being subdivided into a plurality of identical paper sheets extending transversely to the endless longitudinal direction, and
  • CONFIRMATION OPH Providing at least one paper sheet per screen circumference of the round screen with at least one watermark for the control of further processing steps, wherein between the positions of the watermark marks of the paper sheet certain positional deviations exist,
  • the identification marks can be generated in step d) by a touching method.
  • the identification marks are generated in step d) with a non-contact method.
  • it has proved useful to tion marks in step d) in the inkjet process wherein due to the finite time of flight of the ink droplets from the print head to the paper web advantageously an ink flight time compensation is performed.
  • a particular advantage of inkjet-applied markers is that there is no need to extract smoke or snippets as would be necessary with a laser-cut mark.
  • inkjet printers are very compact devices that can be easily integrated into existing equipment. In general, unlike using a hole as a control mark, a colored tag, after cross-cutting, can not hinder the stacking of the individual sheets of paper or cause the holes to get caught.
  • the identification marks are generated in step d) by laser marking.
  • laser-sensitive feature substances can already be introduced into the paper in step a).
  • laser-sensitive feature substances can also be applied to the paper web after papermaking.
  • laser-sensitive feature substances a large number of substances known per se to the person skilled in the art, such as TiO 2 , soot particles or infrared absorbers, come into consideration.
  • the laser-sensitive feature substances are locally modified, for example colored and preferably blackened, and thereby form a machine-detectable identification mark.
  • identification marks are simultaneously generated on the front and back of the paper web in step d) by laser marking.
  • the identification marks are produced in step d) with an arbitrary printing method, in particular in rotary flexographic printing, rotary offset printing, rotary screen printing or intaglio printing.
  • dark or even black identification marks are advantageously generated in step d), which can be recognized particularly easily and reliably by sensors.
  • the colored identification marks can also be produced with dyes which are not visible in the visible spectral range or only visible after excitation, such as IR or UV dyes or else luminescent dyes.
  • the positions of the generated identification marks are detected in step e) in a further processing step, and the paper web is provided with at least one security feature in each of the paper sheets using the detected positions of the identification marks.
  • step e) the current length of a paper sheet is determined in a further processing step el) from the detected positions of the identification marks, and becomes
  • step e) determines from the detected positions of the identification marks the current length of a paper sheet and compared with a predetermined desired length, and is
  • the further processing step can not only consist in providing the paper sheets with security features using the detected positions of the tags. It is also within the scope of the invention, for example, if the positions of the identification marks form the basis for the generation of further position marks with even smaller position deviations. In such an inventive variant are advantageously in step e) in a further processing step
  • the positions of the generated position marks are detected and a further processing step is performed using the detected positions of the position marks.
  • the other position markers can be generated with the same tool together with other security features with particular advantage.
  • the position tags and security features then have a fixed reference and subsequent applications can be adjusted more precisely. Position deviations in the tool can also be compensated by a subsequent flexible application.
  • the still further processing step can then be, for example, in the detection of the positions of the position marks for determining the actual length of the paper sheet and the application of a film corresponding to the above step e2) or the correction of the position of non-contact safety features corresponding to the above-mentioned step f2 ) consist.
  • the position markers can be produced in color, in particular black, with preferably non-contact methods or printing methods being used.
  • the position marks can also be formed by punch marks and in this case, for example, be generated by a rotary punch or by a laser cutter.
  • the invention also includes an apparatus for carrying out the described method, with
  • a transport device for transporting the endless paper web, a first detection device for detecting the positions of two or more watermark marks on the endless paper web, an evaluation device for determining the mark positions with smaller position deviations,
  • an identification device for generating the colored identification marks at the determined brand positions of the paper web, second detection means for detecting the positions of generated flags and
  • a processing device for performing a further processing step using the detected positions of the identification marks.
  • the marking device preferably comprises an inkjet printer or a laser writer.
  • the laser source is advantageously an infrared laser in the wavelength range from 0.8 ⁇ m to 3 ⁇ m, in particular a Nd: Y AG laser or a Nd: YV0 4 laser, or else a CC * 2 laser with a wavelength of 10, 6 ⁇ used.
  • the processing device advantageously comprises a device for stretching and applying a film to the paper web and / or a device for non-contact application of a security feature.
  • inkjet marks In the case of first producing inkjet marks and subsequently laser marks or stamped marks, it may be provided that the inkjet marks are cut out by the laser marks or the stamped mark. In this way, the number of marks present on the sheets that could interfere with successor applications is reduced.
  • the described advantages can also be realized in hybrid designs, in which the inkjet marks can also be printed only after film filming. Furthermore, the principles described can also be used advantageously in the production of pure polymer banknotes since, although there are no watermark marks, the problem of the different influence of a deviating arc length on methods with rigid or flexible tools also exists.
  • FIG. 1 1 with two security elements applied in separate application steps
  • FIG. 3 a paper sheet as in FIG. 2, in which the current sheet deviates from the desired sheet length
  • Fig. 4 shows a paper sheet as in Fig. 2 according to an embodiment of the invention, in which the current arc length deviates from the desired arc length and the laser holes are generated at corrected positions.
  • FIG. 1 shows an endless paper web 10 which is subdivided into a plurality of identical paper sheets 12 n- i, 12 n , 12 n + i extending transversely to the endless longitudinal direction 18.
  • the boundary lines 14 of the individual paper sheets 12 are imaginary lines, which are shown in FIG. 1 for illustration, but are not present on the paper web as visible marking lines.
  • At least one watermark 20 was introduced in each paper sheet 12 for the control of further processing steps.
  • the introduction of such watermark marks 20 is very easy and inexpensive possible in papermaking.
  • the watermark marks 20 are due to the production of a relatively large position tolerance, so that between the positions of the watermark marks 20 same paper sheet 12 certain positional deviations exist.
  • the mentioned positional tolerance of the watermark marks 20 then means that the distance values Xn-i, n, Xn + i, etc. have a relatively large fluctuation.
  • the positions of two or more watermark marks 20 on the endless paper web 10 are detected and mark positions are calculated which have lower position deviations than the watermark marks 20.
  • Such a determination of brand positions with smaller position deviations can be done, for example, by averaging the acquired positions. Since banknote paper is usually made in a rotary screen technique, the position of a watermark 20 is repeated approximately with each screen circumference. Therefore, it is advantageous to averaged over a multiple of watermark marks 20 per screen circumference to determine more accurate label positions. In the exemplary embodiment, about m watermark marks 20 come to a screen circumference and it is averaged over three sieve circumferences. For the averaging, a shift register is advantageously used in which the position of a newly acquired watermark mark x n replaces the oldest detected position x n -3m.
  • the inkjet method has proven particularly suitable for producing such colored identification marks 22.
  • An applied by inkjet printer usually black marking mark 22 can be very well detected by a machine.
  • inkjet printers have a very compact design and can therefore be easily integrated into existing systems.
  • no extraction of smoke or accumulating snippets is required.
  • an applied colored marking mark unlike a through opening, after the cross cutting can not hinder the stacking of the paper sheets 12 or lead to a hooking of the through holes.
  • the print head of an inkjet printer has a certain distance from the paper web 10, due to the rapid movement of the paper web 10, the time of flight of the ink droplets is taken into account as a function of the web speed during printing.
  • the colored identification marks 22 are formed by a laser mark.
  • laser-sensitive feature substances can already be introduced into the paper during papermaking, or laser-sensitive feature substances can be applied to the paper web after papermaking.
  • Suitable laser-sensitive feature substances are, for example, T1O2, soot particles or infrared absorbers.
  • the laser-sensitive feature substances are locally modified, for example colored or blackened.
  • a particular advantage of this variant of the invention is that the laser radiation can reach through the paper web, so that identification marks can be generated simultaneously on the front and back of the paper web in one operation.
  • the identification marks on the front and back are perfectly matched to each other and allow a highly accurate alignment of subsequent processing steps, both on the marks of the front and on the marks on the back.
  • the imprinting of the identification marks 22 takes place in one operation with the imprinting of a printing feature.
  • the tags 22 may be integrated into the print tool so that they are perfectly matched to the print image of the print feature.
  • an identification mark can be integrated in the rotary screen in the printing screen. The subsequent applications controlled on the identification mark generated during the printing step then have a very good registration with the print images of the printing step.
  • the positions of the generated indicia marks 22 are advantageously detected, and the paper web 10 is provided with at least one security feature using the detected positions of the indicia marks in each of the paperboards.
  • machines with rigid tools such as in screen printing or a rotary die
  • machines with flexible tools such as a laser cutting machine
  • FIGS. 2 to 4. 2 shows first a single sheet of paper 12 of the paper web 10 with watermark 20 and marking mark 22.
  • Each sheet of paper 12 carries a plurality of individual benefits 16, which correspond to the later cut banknotes in the embodiment.
  • the nominal length of a single sheet of paper 12 is denoted by Ls.
  • the individual benefits 16 are provided after papermaking in the further processing of the paper web 10 in two separate application steps with two security features 30, 32, which are aligned in the target image and complement each other to form an overall feature 34. This is shown schematically in Fig. 2 by the addition of the two semicircular disks 30, 32 to a circular disk 34.
  • the first security feature 30 is a security feature applied with a rigid tool, in the exemplary embodiment a film feature 30 present on an endless film strip, which is applied to the paper sheet 12 together with the film strip.
  • the second security feature 32 represents a security feature produced with a flexible tool, which in the exemplary embodiment is formed by a through hole 32 cut in the cartridge by means of laser radiation. Pierbogen 12 is formed. If the film features 30 and the laser holes 32 have their desired positions shown in FIG. 2, they complement each other without any offset to the overall feature 34, such as the circular disks shown by way of example in FIG. 2.
  • the absolute position of the laser holes 32 within the individual bumps 16 im also corresponds to the sheet lengths Li deviating from the nominal length Essentially their position at the desired length Ls, as illustrated in Fig. 3 by the missing offset of the right semicircular discs.
  • the two security features 30, 32 then no longer complement each other in the desired manner to the overall feature 34, as can be seen in particular in the lowest utility line with the greatest distance to the identification mark 22, where the relative deviation of the two Security features 30, 32 are the largest.
  • the location of the security features 32 created with flexible tools will be at the location of the security features created with rigid tools 30 adjusted.
  • the positions of the marking marks 22 are detected and the current length Li of a paper sheet 12 is calculated from the detected positions of the marking marks 22. Then a film strip is stretched with the applied to the paper web 10 film features 30 corresponding to the current sheet length Li and applied to the paper web 10.
  • the positions of the identification marks 22 are also detected and from the detected positions of the marking marks 22 the current length Li of the paper sheet 12 is calculated.
  • the actual length Li of the paper sheet is compared with the predetermined target length L s , and the position of the laser holes 32 is corrected based on the deviation of the actual sheet length Li from the target length Ls.
  • the laser holes 32 are then generated at the corrected positions and not at the predetermined positions based on the target arc length L s .
  • the positions of the laser holes 32 can be corrected particularly well, if the percentage deviation of the arc length is used as a basis for calculation.

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  • Paper (AREA)
  • Laser Beam Processing (AREA)
  • Controlling Sheets Or Webs (AREA)

Abstract

L'invention concerne un procédé de fabrication d'une bande de papier (10) continue pour la fabrication de documents de sécurité et de valeur, ce procédé comprenant les étapes suivantes : a) production d'une bande de papier (10) continue sur une machine à formes rondes, la bande de papier étant divisée en une pluralité de feuilles de papier (12) identiques s'étendant perpendiculairement au sens longitudinal continu, et application d'au moins un filigrane (20) sur au moins une feuille de papier (12) sur la circonférence de la forme ronde pour commander d'autres étapes de traitement, certains écarts de position existant entre les positions des filigranes (20) de la feuille de papier, b) détection des positions d'au moins deux filigranes (20) sur la bande de papier (10) continue, c) détermination de positions de repère présentant des écarts de position réduits par rapport aux écarts de position des filigranes (20) détectés, d) production de repères de marquage (22) colorés aux positions de repère déterminées sur la bande de papier (10), et e) détection des positions des repères de marquage (22) produits et exécution d'une autre étape de traitement au moyen des positions détectées pour les repères de marquage (22).
PCT/EP2010/006579 2009-11-02 2010-10-28 Procédé et dispositif pour fabriquer une bande de papier continue filigranée WO2011050956A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP10776943.2A EP2496504B1 (fr) 2009-11-02 2010-10-28 Procédé et dispositif pour fabriquer une bande de papier continue avec des filigranes
ES10776943T ES2430090T3 (es) 2009-11-02 2010-10-28 Procedimiento y dispositivo para la fabricación de una banda de papel continua con marcas de agua

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009051637.9 2009-11-02
DE200910051637 DE102009051637A1 (de) 2009-11-02 2009-11-02 Verfahren und Vorrichtung zum Herstellen einer endlosen Papierbahn mit Wasserzeichenmarken

Publications (1)

Publication Number Publication Date
WO2011050956A1 true WO2011050956A1 (fr) 2011-05-05

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ID=43608104

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2010/006579 WO2011050956A1 (fr) 2009-11-02 2010-10-28 Procédé et dispositif pour fabriquer une bande de papier continue filigranée

Country Status (4)

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EP (1) EP2496504B1 (fr)
DE (1) DE102009051637A1 (fr)
ES (1) ES2430090T3 (fr)
WO (1) WO2011050956A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016014230A1 (de) 2016-11-30 2018-05-30 Giesecke & Devrient Gmbh Wertdokument, Verfahren zum Herstellen desselben und Wertdokumentsystem
EP4008554A1 (fr) * 2020-12-03 2022-06-08 SWISS KRONO Tec AG Procédé et dispositif de traitement d'un objet

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008017392A2 (fr) * 2006-08-09 2008-02-14 Leonhard Kurz Stiftung & Co. Kg Procédé de réalisation d'au moins une ouverture en forme de fenêtre dans un substrat oblong en papier, et dispositif correspondant

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008017392A2 (fr) * 2006-08-09 2008-02-14 Leonhard Kurz Stiftung & Co. Kg Procédé de réalisation d'au moins une ouverture en forme de fenêtre dans un substrat oblong en papier, et dispositif correspondant

Also Published As

Publication number Publication date
EP2496504A1 (fr) 2012-09-12
EP2496504B1 (fr) 2013-08-07
DE102009051637A1 (de) 2011-05-05
ES2430090T3 (es) 2013-11-18

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