EP0687324B1 - Sicherheitspapier mit reduzierter dicke und opazität in lokalen bereichen und das verfahren zu seiner herstellung - Google Patents

Sicherheitspapier mit reduzierter dicke und opazität in lokalen bereichen und das verfahren zu seiner herstellung Download PDF

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Publication number
EP0687324B1
EP0687324B1 EP94908388A EP94908388A EP0687324B1 EP 0687324 B1 EP0687324 B1 EP 0687324B1 EP 94908388 A EP94908388 A EP 94908388A EP 94908388 A EP94908388 A EP 94908388A EP 0687324 B1 EP0687324 B1 EP 0687324B1
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EP
European Patent Office
Prior art keywords
sheet
paper
thickness
region
ply
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Expired - Lifetime
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EP94908388A
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English (en)
French (fr)
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EP0687324A1 (de
EP0687324B2 (de
Inventor
Pierre Doublet
Yves Douesneau
Jean-Paul Menez
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ArjoWiggins Security SAS
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ArjoWiggins SAS
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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/06—Vegetable or imitation parchment; Glassine paper
    • 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
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
    • D21F11/006—Making patterned paper
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
    • D21F11/06—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines of the cylinder type
    • D21F11/08—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines of the cylinder type paper or board consisting of two or more layers
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/40—Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security paper

Definitions

  • a sheet of security paper having areas localized with reduced thickness and opacity and more particularly a banknote paper or security paper with zones significant thickness and reduced opacity, at specific locations, these areas being watermarks.
  • the invention preferably relates to a sheet of paper comprising at least an area with a uniform average opacity at least 40% lower per compared to the opacity of the rest of the sheet.
  • paper means any sheet obtained by wet using a suspension of natural cellulose fibers and / or synthetic fibers which may contain various fillers and various additives commonly used in stationery.
  • the light areas are due to the fact that the thickness of the sheet and the density of the fibers are lower than sheet thickness and fiber density in areas where there is no has not been imprinted by the watermark roller. On the contrary, dark areas are due to the fact that the sheet thickness and fiber density are more important.
  • Such watermarks have clear parts which generally have areas of a few mm 2 and the variation in opacity between the light part of the watermark and the non-watermarked paper is small. If you want to print on the light areas of these watermarks, it is very difficult to match the light areas and the print and even with very precise identification of the watermarks, it is difficult to obtain a good match.
  • the first problem is: To make a watermark, the man in the profession knows that you can emboss the canvas in a round shape using a punch. For example, if you want a clear circular area, emboss the canvas with a circular punch. However, using such a method, one does not get a clear area of constant opacity. In fact, we have noticed that fibers tend to deposit more large quantity near the center of the embossed part only at the edges and therefore the center of the watermark appears much less clear than the edges. If we use a roller watermark which has raised asperities, we get the same phenomenon.
  • a second problem which arises is that when one wants zones of reduced thickness and therefore clear having an area of more than 0.4 cm 2 , one does not obtain a clear zone.
  • the sheet of paper obtained according to this process is such that the zone having a reduced thickness has a thickness less than 40% of the thickness of the rest of the sheet.
  • the sheet can also be such that said area has an average opacity less than 40% of the opacity of the rest of leaf.
  • the process requires a transformation of the paper machine, namely that one combines with the watermarked canvas, or with the watermark roller, or with the round shape, pieces flexible. These parts must be fixed in specific places and therefore require a additional handling.
  • the area is 30% less thick than the thickness of the rest of the sheet.
  • Document EP-A-0 229 645 describes a process for manufacturing a sheet of security with a security thread. It consists of forming a first layer of paper and a second layer of paper, to introduce a security element between these two layers, to combine these two layers. One of the layers has local regions whose thickness is 0 to 30% of the total thickness of the sheet of paper. Such a safety sheet makes it possible to obtain a sheet comprising a more or less apparent security thread on the surface.
  • banknotes which consist of sheets of material transparent synthetic on which two-sided printing is performed, printing being such that it leaves a completely transparent area. On this transparent area we carry a hologram.
  • plastic tickets have some drawbacks. They are not very resistant to handling and traffic because the impression can be fragile on the plastic. This is why we prefer paper tickets, but we want to at the same time make the area as transparent as possible.
  • the area obtained is certainly of reduced thickness and reduced opacity, but we want an even lower opacity area.
  • Another object of the invention is to provide an area in the paper which is practically transparent or translucent, without piercing the paper in this area.
  • Another goal is to make a practically transparent or translucent area in the paper, this area can be printed and / or can receive a hologram or any other distinctive or security mark.
  • This zone must therefore be strong enough to support the carry of a security.
  • An object of the invention is therefore to provide zones of reduced thickness compared to the rest of the sheet without the need to use associated flexible parts.
  • Another object of the invention is to provide zones having a much smaller thickness. reduced than 40% compared to the rest of the sheet.
  • the invention relates to a sheet of paper comprising at least one zone of reduced thickness and opacity having an area of more than 0.4 cm 2 , characterized in that said sheet is a sheet comprising a structure twin-jet consisting of a first layer of paper comprising at least one zone whose thickness is zero and of a second layer of paper of substantially constant thickness, the two layers being directly joined.
  • the sheet according to the invention may comprise in part of the zone reduced opacity a hologram, an iridescent coating, an impression using conventional inks or inks containing colored pigments, fluorescent, luminescent pigments, photochromic, piezooptic compounds, piezochromes.
  • the second throw can be partially or completely transparentized.
  • this jet can be obtained using the tracing paper, namely from a suspension of very strong cellulose fibers refined, to obtain transparency.
  • the second roll is partially transparent, it is chemically transparent in a zone which comes in correspondence with the zero thickness zone of the first jet.
  • the sheet of paper does not differ from a sheet of paper made on a single canvas.
  • the process is such that regions of zero thickness are made by embossed regions in relief on the mechanical fabric, from which it follows that the deposition of fibers in these regions is totally prohibited.
  • At least one of the layers of the paper is produced by a machine with round shape.
  • the thinner regions of the paper sheet are formed under form of a simple geometric pattern, in particular in the form of regions flat approximately rectangular, round or elliptical or any other form.
  • Figure 1 shows a device that can be used to make a paper according to the invention.
  • the device essentially corresponds to usual commercial papers, which include at least two wet parts separated.
  • the preferred embodiment shown here consists of a combination of two round-shaped wet parts 1 and 2 of a so-called double round paper.
  • a first strip of paper 3 which is directed towards the second wet part 2 by hanging below the taker felt 4.
  • the second installation 2 we make a second strip of paper 5.
  • the two strips of paper are gathered at the roller 6 and are then dried.
  • FIGs 2 and 3 there is shown a paper which is not covered by the claims.
  • This sheet 7 is formed of a first strip 3 and a second strip 5.
  • the strip 5 comprises clear watermarks 8 obtained for example by an embossing in relief of the canvas of the round shape 5. These clear watermarks have a depth e 1 .
  • the total thickness e t of the sheet 7 is the sum of the thicknesses e 3 of the strip 3 and e 6 of the strip 5.
  • the thickness e 2 of the sheet 7 opposite the watermarks 8 is less than the total thickness and t .
  • the region 8 is such that the strip 5 has a hole.
  • the reduction in thickness is therefore approximately 33% in the first case and 50% in the second case.
  • the sheet of Figure 3 therefore has a reduced opacity much lower than the opacity of the sheet of Figure 2, in the region 8 and this for a total thickness e t substantially equal.
  • the sheet 11 comprises zones 12, 12 a , 12 b , of thickness e 1 and zones 13, 13 a , of thickness e 2 not zero.
  • Zones 13, 13 a have a density of fibers much lower than the density of zones 12, 12 a , 12 b .
  • Each zone 13, 13 has undergone an additional transparency.
  • This transparentization is carried out chemically according to this embodiment.
  • the transparentization is carried out using a transparentization composition described in the European patent of the applicant EP-91 341.
  • the additional transparentization is carried out after drying of the sheet, at the end of the machine.
  • This composition is applied for example by printing using an engraved printing cylinder, the cylinder engravings corresponding to the areas 13, 13 a to be transparentized.
  • FIG. 6 represents in section a sheet 14 obtained according to the technique of "bijet" shown in Figure 1.
  • the sheet 14 shown in Figure 6 is formed of a first strip 16 and a second strip 17.
  • the strip 17 is such that it has zones 18 of zero thickness.
  • the strip 16 can be transparentized or not in the zones next to zones 18.
  • Zero thickness areas are made by embossing the canvas with the round shape 5, sufficiently so that at the level of the embossings, there is no deposition of cellulose fibers.
  • the strip 16 can be a tracing paper obtained by a deep refining of cellulose fibers.
  • Printed patterns 15 can be placed next to zones 18. It is also possible deposit layers of fluorescent pigments, layers or prints of iridescent pigments, metallic prints, holograms. We'll have then a sheet of paper with a transparent area in light transmitted, this area being of large surface. If we lay a layer, for example iridescent on the transparent area, this layer not covering only partially the transparent area, we will have a visual effect additional. In addition, such a sheet will be very difficult to reproduce by color photocopier because the iridescent area will not be reproduced by copy and the transparent area will be opaque after copying.
  • a security paper preferably a paper for checks, obtained according to the method according to the invention.
  • This security paper 19 comprises at least one zone 20 whose thickness is less than the thickness from the rest of the sheet. So, if we write on field 20, the amount of check, in the event that a counterfeiter attempts to scratch this zone 20, he will pierce the security paper.
  • the zone 20 has a thickness 40% less than the thickness of the rest of the sheet.

Claims (16)

  1. Sicherheitspapierbogen mit mindestens einer Zone (8, 20) verminderter Dicke und verminderter Opazität mit einer Oberfläche von mehr als 0,4 cm2, dadurch gekennzeichnet, daß es sich bei dem Bogen um einen Bogen mit einer zweilagigen Struktur aus einer ersten Papierschicht (17) mit mindestens einer Zone (18) der Dicke null und einer zweiten Papierschicht (16) mit einer im wesentlichen konstanten Dicke handelt, wobei die beiden Schichten direkt miteinander verbunden sind.
  2. Sicherheitspapierbogen nach Anspruch 1, dadurch gekennzeichnet, daß die Dicke des Bogens in den Zonen verminderter Dicke und verminderter Opazität bis zu 80% der Dicke des übrigen Bogens beträgt.
  3. Sicherheitspapierbogen mit mindestens einer Zone (8, 20) verminderter Opazität nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Zone infolge der Verminderung ihrer Dicke gegenüber der Dicke des übrigen Bogens und infolge einer zusätzlichen Transparentisierung der zweiten Schicht (16) eine verminderte Opazität aufweist.
  4. Bogen nach Anspruch 1 oder 3, dadurch gekennzeichnet, daß der Bogen in der Zone verminderter Dicke und verminderter Opazität eine Dicke von weniger als 40% der Dicke des übrigen Bogens aufweist.
  5. Bogen nach einen der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß er in einem Teil der Zone verminderter Opazität ein Sicherheitselement (15) wie ein Hologramm, eine irisierende Schicht, einen Aufdruck aus herkömmlichen Druckfarben oder Druckfarben mit Farbpigmenten, Fluoreszenzpigmenten, Leuchtpigmenten und photochromen, piezooptischen und piezochromen Zusammensetzungen enthält.
  6. Bogen nach einem der Ansprüche 3 bis 5, dadurch gekennzeichnet, daß die zweite Schicht (16) vollkommen transparentisiert ist und aus einer Suspension hochgereinigter Cellulosefasern nach dem Pauspapierverfahren erhalten wird.
  7. Bogen nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die zweite Schicht (16) in einer Zone, die auf der Zone (18) der Dicke null der ersten Schicht (17) zu liegen kommt, teilweise chemisch transparentisiert ist.
  8. Verfahren zur Herstellung eines Papierbogens mit mindestens einem Bereich (8, 20) mit gegenüber dem übrigen Bogen verminderter Dicke und verminderter Opazität, bei dem man:
    auf einem Sieb einer ersten Naßpartie einer Papiermaschine eine erste Papierschicht (3) bildet,
    auf einem Sieb einer zweiten Naßpartie einer Papiermaschine eine zweite Papierschicht (5) bildet,
    wobei die erste Papierschicht mindestens einen lokalen Bereich (18) der Dicke null aufweist,
    und die beiden Schichten direkt miteinander verbindet und trocknet,
       wobei der Bogenbereich (8, 20) geringerer Dicke eine einheitliche mittlere Opazität und eine Oberfläche von mindestens 0,4 cm2 aufweist.
  9. Verfahren nach Anspruch 8, dadurch gekennzeichnet, daß man die zweite Schicht (16) vollkommen transparentisiert und aus einer Suspension hochgereinigter Cellulosefasern nach dem Pauspapierverfahren erhält.
  10. Verfahren nach Anspruch 8, dadurch gekennzeichnet, daß man die zweite Schicht (16) in einer Zone, die auf der Zone (18) der Dicke null der ersten Schicht zu liegen kommt, teilweise chemisch transparentisiert.
  11. Verfahren nach einem der Ansprüche 8 bis 10, dadurch gekennzeichnet, daß die Dicke der beiden Papierschichten in den lokalen Bereichen (8, 20) geringerer Dicke bis zu 80% der Dicke des übrigen Bogens betragt.
  12. Verfahren nach einem der Ansprüche 8 bis 11, dadurch gekennzeichnet, daß man dabei die bereiche (18) der Dicke null durch Reliefprägungsbereiche auf einem feinen Metallsieb, wodurch die Abscheidung von Fasern in diesen Bereichen vollkommen unterbunden wird, erzeugt.
  13. Verfahren nach einem der Ansprüche 8 bis 12, dadurch gekennzeichnet, daß man vorzugsweise mindestens eine der beiden Papierschichten auf einer Rundsiebmaschine herstellt.
  14. Verfahren nach einem der Ansprüche 8 bis 13, dadurch gekennzeichnet, daß man die Papierbogenbereiche (8, 20) geringerer Dicke in Form eines einfachen geometrischen Motivs, insbesondere in Form von in etwa rechteckigen, runden oder elliptischen flachen Bereichen, ausbildet.
  15. Verwendung eines Bogens nach einem der Ansprüche 1 bis 7 als Banknotenpapier.
  16. Verwendung eines Bogens nach einen der Ansprüche 1 bis 7 als Sicherheitspapier.
EP94908388A 1993-03-02 1994-03-01 Sicherheitspapier mit reduzierter dicke und opazität in lokalen bereichen und das verfahren zu seiner herstellung Expired - Lifetime EP0687324B2 (de)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
FR9302373 1993-03-02
FR9302373 1993-03-02
FR9311485 1993-09-28
FR9311485 1993-09-28
PCT/FR1994/000225 WO1994020679A1 (fr) 1993-03-02 1994-03-01 Papier de securite comportant des zones localisees d'epaisseur et d'opacite reduites et son procede de fabrication

Publications (3)

Publication Number Publication Date
EP0687324A1 EP0687324A1 (de) 1995-12-20
EP0687324B1 true EP0687324B1 (de) 2000-01-19
EP0687324B2 EP0687324B2 (de) 2005-12-07

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EP94908388A Expired - Lifetime EP0687324B2 (de) 1993-03-02 1994-03-01 Sicherheitspapier mit reduzierter dicke und opazität in lokalen bereichen und das verfahren zu seiner herstellung

Country Status (5)

Country Link
US (1) US6402888B1 (de)
EP (1) EP0687324B2 (de)
DE (1) DE69422705T3 (de)
ES (1) ES2142937T5 (de)
WO (1) WO1994020679A1 (de)

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GB8905471D0 (en) * 1989-03-10 1989-04-19 De La Rue Co Plc Sheet with security device
FR2684698B1 (fr) * 1991-12-09 1994-01-21 Arjo Wiggins Sa Procede pour la fabrication d'un produit comportant des zones localisees d'opacite reduite et papier ainsi obtenu.
FR2685019A1 (fr) * 1991-12-12 1993-06-18 Arjo Wiggins Sa Papier de securite ou decoratif contenant des planchettes.

Also Published As

Publication number Publication date
US6402888B1 (en) 2002-06-11
EP0687324A1 (de) 1995-12-20
ES2142937T3 (es) 2000-05-01
ES2142937T5 (es) 2006-07-16
WO1994020679A1 (fr) 1994-09-15
DE69422705T2 (de) 2000-10-05
EP0687324B2 (de) 2005-12-07
DE69422705D1 (de) 2000-02-24
DE69422705T3 (de) 2006-08-17

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