EP2031127A1 - Procédé de production d'une ouverture de passage dans un papier de sécurité multicouche - Google Patents

Procédé de production d'une ouverture de passage dans un papier de sécurité multicouche Download PDF

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Publication number
EP2031127A1
EP2031127A1 EP20080019594 EP08019594A EP2031127A1 EP 2031127 A1 EP2031127 A1 EP 2031127A1 EP 20080019594 EP20080019594 EP 20080019594 EP 08019594 A EP08019594 A EP 08019594A EP 2031127 A1 EP2031127 A1 EP 2031127A1
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EP
European Patent Office
Prior art keywords
paper
security
layer
web
openings
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.)
Granted
Application number
EP20080019594
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German (de)
English (en)
Other versions
EP2031127B1 (fr
Inventor
Friedrich Kretschmar
Mario Keller
Ralf Liebler
Jürgen Ruck
Wolfgang Wensauer
Theodor Burchard
Thomas Bodendieck
Gregor Grauvogl
Horst Reigl
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.)
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Publication date
Application filed by Giesecke and Devrient GmbH filed Critical Giesecke and Devrient GmbH
Publication of EP2031127A1 publication Critical patent/EP2031127A1/fr
Application granted granted Critical
Publication of EP2031127B1 publication Critical patent/EP2031127B1/fr
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Anticipated expiration legal-status Critical

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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
    • 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
    • D21H21/42—Ribbons or strips

Definitions

  • the invention relates to a method for producing a passage opening in a multilayer security paper.
  • Security papers or documents of value are often provided with security features, such as watermarks, embedded security threads and the like, which make it possible to check the authenticity of the security paper or value document and at the same time serve as protection against unauthorized reproduction.
  • security paper here refers to the unprinted paper, which is usually in quasi-endless form and is further processed at a later time.
  • a "document of value” is a document that has been completed for its intended use.
  • Value documents within the meaning of the present invention are, in particular, bank notes, shares, bonds, certificates, vouchers, checks, high-quality admission tickets, but also other papers which are subject to counterfeiting, such as passports and other identification documents, as well as product security elements such as labels, seals, packaging and the like.
  • the simplified term “security paper” or "value document” below includes all such documents and product security means.
  • authenticity features have proven themselves that can only be introduced into the security paper during production.
  • a first type of authenticity features such as watermarks, security threads, chemically-reactive additives or mottled fibers, serve for visual authentication by a human. Although these features are visually recognizable, they guarantee a high degree of safety, since the paper equipped with such authenticity features can only be produced with complex machines to which a counterfeiter has no access and whose purchase or replica is not economically worthwhile for counterfeiting purposes.
  • security papers have for a long time also been provided with authenticity features of a second type, which can only be detected by means of special detection devices.
  • a forger additionally has the problem of having to identify the presence of a feature and its special properties.
  • a security thread for embedding in banknotes or other value documents may have a visually recognizable negative light in transmitted light and additionally a machine-readable magnetic code.
  • the present invention seeks to propose a method for producing security paper with high security against counterfeiting.
  • Multi-ply security paper is a security paper combined from several layers, whereby the merging of the layers can take place already with the papermaking or only after the papermaking.
  • the security paper can be equipped with one or more authenticity features.
  • Foreign elements can be applied to the security paper, visually or machine-controllable measures can be taken on the individual layers that make up the multilayer security paper, and intercalations between two or more of the individual layers can be introduced.
  • the multilayer security paper contains at least one layer of paper.
  • the further layers can likewise be made of paper, but also of other materials, for example by plastic films.
  • the foreign elements can be applied, for example, glued, both during and after paper production in endless form, such as strips or tapes, or in the form of label-shaped individual elements on the security paper.
  • individual elements such as fibers, planchettes, pigments, imprints and the like, or continuous materials such as security threads, security tapes, nets, meshes, fabric material or film webs may be considered.
  • the individual layers can have a total or even only partially different thickness or different composition. The latter can be achieved for example by additives in the production of individual layers or by forming the individual layers of different fibers.
  • the individual layers can have a different surface structure. These include, for example, authenticity features, such as through openings, watermarks or interruptions, in one or more of the individual layers. Subsequent deformation of the paper layers, for example with the aid of a dandy cutter, is also possible.
  • authenticity features can be produced on the one hand with the measures just mentioned, ie in particular by varying the thickness, the composition or the surface structure of the paper layers. Additional possibilities arise when different materials, such as paper and plastic films, are combined. One, several, or even all of the different material layers can then be provided with authenticity features, wherein a particularly high protection against counterfeiting is achieved when the authenticity features of different layers enter into a functional correlation with each other.
  • the information present in different layers may be complementary to a total information, or the effect of an authenticity feature of one layer may presuppose the presence of another feature in another layer.
  • an endless security element is introduced into a first paper ply, which is freely accessible on at least one side of the paper ply.
  • the first paper layer is on the freely accessible Side of the security element covered by a second paper layer, which has one or more openings in the region of the security element.
  • the extent of the opening (s) perpendicular to the running direction of the endless security element is smaller than its width so that it does not extend beyond the security element.
  • the endless security element can be formed in particular by a security thread or a wide security band.
  • Security threads have a width of 2 mm or less, usually about 1 mm.
  • Wider endless security elements are referred to as security bands in the context of this description. In particular, they have a width of 4 mm to 20 mm, sometimes even up to 30 mm.
  • the wide security tapes typically divide the first paper layer into two parts so that they are visible and accessible on both sides of the paper layer.
  • a characteristic deckle edge is advantageously formed in the edge regions of the security band, which is not reproduce by cutting or punching.
  • the security element may also be fastened with an adhesive in the first paper layer.
  • the endless security element can moreover be equipped with optically variable effects, in particular with a diffraction structure, a hologram, a color shift effect or another interference layer effect. It can also be provided with a printed image, in particular positive or negative characters.
  • the opening of the second paper layer may, for example, in the form of a strip-shaped extending along the endless security element Interruption be provided. Such an interruption can be closed during production with a rupturable release strip, so that an initially closed security paper is formed into which an opening can be made at a later time. Any other hole shapes are eligible for the openings, such as a regular sequence of round or square interruptions.
  • the openings in the second paper layer are filled with a transparent material, in particular a polyurethane adhesive.
  • the first paper layer contains a watermark and the second paper layer in the region of the watermark contains an interruption in which the watermark clearly emerges.
  • the first paper layer has a grammage of 60 to 80 g / m 2 , in particular of 65 to 70 g / m 2
  • the second paper layer has a grammage of 15 to 45 g / m 2 , in particular from 20 to 25 g / m 2
  • the conditions are reversed, and the first paper layer has a grammage of 15 to 45 g / m 2 , in particular from 20 to 25 g / m 2
  • the second paper layer has a grammage of 60 to 80 g / m 2 , in particular from 65 to 70 g / m 2 .
  • first and / or second paper web advantageously takes place in a DC round wire paper machine.
  • first and / or second paper web can be produced in a short former in which the paper pulp is sprayed onto a round screen.
  • the second paper web is produced on a round screen, the holes of which are closed in partial areas.
  • the sheet formation is suppressed in these sub-areas and there are fiber-free areas, so openings, in the second paper web.
  • the closing of the holes can be done with advantage by applying, in particular sticking a cover strip, by partial printing of the screen with a lacquer layer or by a voltage applied from the inside of the lateral surface of the round cover ring. It is also possible to run the endless security element in the papermaking on the round screen so that it closes the holes of the round screen at the accumulated places.
  • At least two paper layers produced with different fibers are combined with one another.
  • the at least two paper layers can be formed in particular from fibers of different colors, different lengths or fibers with different feature additions.
  • the paper layers produced with different fibers are formed with mutually complementary interruptions and complement each other to form a combination paper.
  • This combination paper layer has no greater thickness than the individual layers, since the contributions of the individual layers to the combination paper layer are arranged in each case in interruptions of the other paper layers.
  • the paper layers consist of two complementary stripe patterns, so that the combination paper layer results in an alternating sequence of strips of the two individual paper layers.
  • the at least two layers of paper produced with different fibers have interruptions in the form of vertical or horizontal strips and are arranged one above the other in the security paper, so that they form a checkerboard pattern.
  • a first, watermark-containing paper layer is formed from short fibers and combined to increase the tear strength with a second thinner paper layer of long fibers.
  • the first paper layer of short fibers is even sandwiched between two thinner paper layers with long fibers. Thereby the high tear strength of the long fiber layer (s) is combined with the pronounced watermark effect of the short fiber layer.
  • a first paper layer containing a watermark is covered by a second paper layer, which is formed in the region of the watermark with transparent fibers and outside the watermark region with ordinary, non-transparent fibers. The watermark is then protected by the transparent fiber area and yet clearly visible.
  • the at least two paper layers produced with different fibers can be combined with further full-surface or interrupted paper layers. They can also be combined with a security element, which is preferably visible through the paper layers at least in a partial area, for example an opening.
  • the suction device may be a perforated suction roll or a suction tube.
  • the suction tube can suck either pulsed or continuously.
  • the openings of the suction roll or the suction pipe can be shaped as desired, so that more complicated hole shapes, such as stars, alphanumeric characters, etc., can be generated.
  • the fibers of the second paper web are only partially removed by the suction device in order to produce regions of lesser layer thickness in the second paper web.
  • the regions of reduced layer thickness of the second paper web may, for example, be in register with watermark regions of the first paper web so as to make them bright.
  • the fibers of the second paper web are completely removed by the suction device in order to produce openings in the second paper web.
  • These openings are advantageously produced in register with openings of the first paper web.
  • the openings of the first and second paper web can thus complement each other to a see-through hole.
  • the openings of the first paper web are produced by so-called E-types on a round screen, while the opening in the second paper web is formed as a continuous strip with the continuously sucking suction tube and the E-type opening and strip opening come to lie one above the other.
  • the width of the security element can correspond to the width of the openings, but also be smaller or larger.
  • the suction device is arranged between the second and the first wet end, so that it sucks the paper fibers of the second paper web on their way to the first paper web.
  • the suction device after the merging point of the first and second paper web.
  • the paper fibers of the second paper web are in this case preferably sucked through openings in the first paper web.
  • Said register-containing openings of the two paper webs are advantageously combined with a security element whose respective security features are then visible from both sides of the security paper.
  • a security element is in particular a security thread, preferably a two-sided security thread, such as a double hologram security thread, a dual color layer security thread or the like into consideration.
  • the security element can also have an element in the paper web running direction which is in register with the document to be produced. The security element is then introduced in the longitudinal register, which can be done for security threads, for example by means of a direct thread drive.
  • the suction device may be appropriate to form in a trapezoidal or triangular shape in order to obtain a sufficiently large contact surface with the second paper web.
  • a suction device is used, which is designed as a composite of several segment plates Absaugrad.
  • Such a suction device may generally be used in papermaking to create thin spots or openings in a wet paper web.
  • the suction device is formed by a composite of several segment plates Absaugrad, wherein one or more intermediate plates are provided as a segment plates, which form the removal openings for sucking a substance / water mixture from the wet paper web, and two on both sides of the intermediate plates arranged cover plates, the edge boundary serve.
  • At least a portion of the segment plates expediently has channels connected to the removal openings for the extraction of the substance / water mixture.
  • the areas of the intermediate plates adjoining the removal openings are advantageously recessed.
  • a stationary vacuum device may be provided, which grinds in operation on the surface of at least one of the cover plates of the rotating Absaugrads and which is connected to the exhaustion of the substance / water mixture via one of the channels with each standing in contact with the paper web removal opening.
  • the suction device is coated with a flexible plastic mask, which has recesses in the form of patterns, characters or codes in the region of the removal openings.
  • These recesses can be made very fine and be formed, for example, in the form of alphanumeric characters or finely engraved graphic symbols. They can also form continuous or registered patterns.
  • a method for producing a security paper which itself is not part of the invention, it is provided that in a wet end of a paper machine on a round screen a paper web is formed and lifted by means of a carrier tape from the round screen, and in which the lifting of the paper web from a in Close proximity to the round screen and arranged with a short distance to the carrier tape suction device is supported.
  • a negative pressure is preferably generated which is at least 0.1 bar, in particular by about 0.2 bar, greater than the negative pressure in the interior of the round screen.
  • the suction device is formed by a rotatable suction roll, which is preferably driven in register-synchronism with the round screen of the wet end.
  • the suction roll on a perforated roll shell, which is surrounded by a perforated blanket and a felt defined permeability.
  • the method described is particularly suitable for those production variants in which on the round screen a watermark in the paper web is introduced. Because of the different paper thickness, the distance of the suction device to the round screen is then adjusted appropriately in the region of the watermark to the local paper thickness.
  • the screen has ridges and depressions for producing watermark areas, and structuring is provided in the pits to facilitate paper separation from the screen ,
  • the elevations and depressions for generating Balkenwasser Lake are arranged bar-shaped next to each other.
  • the structurings are particularly advantageously formed by grooves, in particular by grooves milled into the recesses.
  • the patterning in the recesses results in a more regular deposition of stock on the screen, an improved decrease and thus a more uniform brightness in the watermark areas of the produced paper web.
  • the second web-side carrier felt is expediently subjected to a suction pressure S 2 and the first web-side carrier felt in the areas outside the opening with a suction pressure S 1 is applied, which is greater than S 2 , so that the second paper web can not be lifted in these areas.
  • no suction pressure is applied to the first web-side felt in the region of the opening, which can be achieved, for example, by pulsed suction.
  • the first web-side carrier felt in the region of the opening even with a counter-blowing pressure, in particular an air jet, water jet or a laser beam, acted upon to support the lifting of the second paper web in this area.
  • a luminescent substance and optionally another feature substance are homogeneously distributed in the volume of the paper layer in at least a first paper layer of the security paper, said first paper layer at least in one Partial area has at least two different paper thicknesses.
  • the different paper thickness is reflected in the amount of luminescent substance present or the luminescence radiation emitted, ie in areas with thicker paper, there is more luminescent per unit area than in areas with thinner paper, hence the intensity of the luminescent radiation is higher in areas with thicker paper than in areas with thinner paper.
  • the security paper can be provided with a variety of different codes. The number of codes can be further enhanced by incorporating additional feature substances.
  • Suitable luminescent substances are all fluorescent and phosphorescent substances which emit light in the visible, UV and IR spectral range after appropriate excitation.
  • luminescent substances are used which emit outside the visible spectral range.
  • luminescent substances can be used as in EP 0 053 183 B and EP 0 052 624 B are disclosed.
  • the concentration of a luminescent substance based on the weight of the finished sized paper usually ranges from 0.05% by weight to 5% by weight, preferably from 0.1% by weight to 1% by weight.
  • the luminescent substance is preferably transparent in the visual spectral range, so that it is not readily visually recognizable.
  • the range of available luminescent substances and their optically verifiable properties is very large, so that a potential fraudster, even if he knows that a luminescent substance is present, would have to carry out an elaborate analysis in order to check the correct luminescent substance as well as that from the competent authorities to find optical property of this substance.
  • Luminescent substances which are not available in free trade and have special optical properties and are detectable only with special measuring devices tuned thereto are advantageously suitable for the machine inspection.
  • luminescent substances with anti-Stokes or quasi-resonant behavior can be used.
  • luminescent materials in which both excitation and emission spectrum are out of the visible range are used.
  • the luminescent substances are incorporated by, for example, in papermaking e.g. the pulp are added and homogeneously distributed by stirring the paper pulp.
  • the luminescent substance used can be combined with one or more further luminescent substances but also with one or more further feature substances.
  • all materials which can be incorporated into the pulp during papermaking and which can be recognized by machine, ie have a physically or chemically measurable or detectable effect are suitable as feature substances.
  • substances having electrical and / or magnetic properties are suitable, for example electrically conductive pigments, such as metal particles, electrically conductive polymers, magnetizable iron oxide or iron particles, paramagnetic particles, such as Ni or Mn.
  • concentration of a feature substance based on the weight of the finished sized paper is usually about 1 wt .-%.
  • the feature substances can be processed in papermaking, such as paper fillers. Processes for this are known to the person skilled in the art.
  • the first paper layer further has thickness modulations in at least a portion, i. Areas where the security paper has different thicknesses. Every conceivable form is possible. In the simplest case, an area with two different thicknesses is present in the paper layer.
  • the different paper thicknesses can be produced by different techniques. In the paper layer and windows can be incorporated, so areas that have a paper thickness of zero.
  • the thickness modulation is realized in the form of a watermark.
  • the watermark can be incorporated during the scooping process in the paper layer or be subsequently embossed.
  • the thickness modulation can have any conceivable shape.
  • the watermark represents a barcode.
  • the watermark can also be formed as a two-dimensional area code in the manner of a chessboard. But also complicated watermarks, z. As portraits, with many different paper thicknesses, which can be seen in the finished paper as different shades of gray, can be produced and used.
  • the paper of the first paper layer usually has a weight of 65 to 120 g / m 2 , a density of 500 to 1000 kg / m 3 and a thickness of 50 to 200 microns. With an average paper thickness of 100 .mu.m, the thickness of the regions appearing brighter in transmitted light is about 85 .mu.m or less, and the thickness of the regions appearing darker in transmitted light is about 115 .mu.m or more.
  • the paper of the first paper layer preferably has a weight of 70 g / m 2 , an average thickness of 100 ⁇ m and a density of 700 kg / m 3 .
  • the light-emitting areas which appear brighter in this case have a thickness of about 70 ⁇ m.
  • the differences in thickness in the paper are visually imperceptible. This is achieved by keeping the thickness differences in the paper very small.
  • the minimum or maximum paper thickness in the watermark is 1 to 10%, preferably 1 to 5%, below or above the average paper thickness.
  • Paper thickness modulations e.g. are in the range of 105 .mu.m to 115 .mu.m, are no longer visible in the transmitted light with the naked eye as watermarks, but with a sensor very well detectable.
  • camouflage is to overprint the areas of different paper thicknesses.
  • printing inks used which in the spectral regions in which the feature substance is excited and emitted, do not absorb, ie are transparent.
  • the first layer comprises incorporated thickness modulations and at least one luminescent substance which can optionally be combined with further luminescent substances.
  • the second layer may comprise no luminescent substance, the same luminescent substance as the first layer, a luminescent substance different from the first layer or else combinations of different luminescent substances. The same applies to any further existing paper layers.
  • the paper thickness variations of the first and second layers or optionally also further layers can be coordinated so that the layers complement each other to form a multilayer security paper of constant thickness.
  • one or more further feature substances can be incorporated independently of one another into the individual layers.
  • the feature substances are, as described above, machine-readable substances, preferably with electrical and / or magnetic properties.
  • This aspect offers the advantage that, although it is merely provided with a luminescent substance, a security paper can be produced by simply varying the paper thickness with a variety of codes. By combining the luminescent and feature substances, the number of different possible variations can be further increased.
  • the production of the coded security paper is particularly simple in that the incorporation of the luminescent and optionally feature substances as well as the paper thickness modulation in one step in papermaking and no additional equipment is required to be integrated into the paper machine. In this way, different currencies, denominations of a currency or even tax stamps, etc. can be cost-effectively provided with a machine-readable encoding.
  • the counterfeit protection can be significantly increased by the fact that the coding is made invisible, i. Visually not recognizable, but nevertheless easily measurable by machine. Due to the integrated luminescence and feature substances in the paper volume, a subsequent change of the authenticity mark is not possible without destroying the paper.
  • the luminescent, electrical and / or magnetic properties of the security paper are measured by means of a sensor, resulting in very specific signal intensities depending on the concentration of the luminescent or the feature substance and the paper thickness.
  • the signal intensity is influenced as follows: the higher the concentration (amount of a substance per unit volume) of the luminescent or feature substance in the paper or the thicker the paper is at a certain point, the higher the intensity of the measurement signal.
  • the paper appears thinner at the points appearing brighter in transmitted light, and thicker at the darker points in relation to the normal paper thickness. Consequently, the thickness modulation in the paper results in a modulation of the amount of luminescent substance. Accordingly, the signal intensity also varies.
  • the Measurement by means of a hand sensor, which responds to the different luminescence or feature substances.
  • Fig. 1 shows a schematic representation of a Doppelrundsieb-paper machine 10, as it is used in the manufacture of security paper.
  • the paper machine 10 includes two rotary screen paper machines 12 and 14, which communicate with each other via a pick-up felt 16.
  • a paper web 20 is formed on a round screen 18, in which a security element, here a wide liquid-impermeable security tape 22, is embedded.
  • the security belt 22 runs on bumps 26 of the round screen 18 before it dips into the paper pulp 24 of the paper machine.
  • the security tape 22 may, for example have a width of 20 mm or even 30 mm. Due to its large width, no sheet formation takes place in the areas in which the liquid-impermeable security tape 22 rests on the protuberances 26 of the first paper wire 18, so that the security tape 22 divides the first paper web 20 into two parts.
  • At the edges of the security band 22 forms a characteristic deckle edge. For better anchoring of the safety band 22 liquid or even fiber-permeable areas can be provided in its edge regions.
  • a second, homogeneous paper web 30 is produced in parallel thereto, removed from the round wire 34 by means of the pick-up felt 16 and guided to the first paper machine 12, where it is connected to the first paper web 20 in the region of the pressure roller 36.
  • the first paper web 20 with the enclosed security tape 22 is covered over its entire area by the homogeneous second paper web 30.
  • the interconnected paper webs 38 are then fed to other processing stations, such as calenders, sizing and the like.
  • the second paper web 30 may, as in Fig. 2 also be produced with a Kurzformer 40, in which the paper pulp is sprayed onto the surface of a round screen 44 with a headbox 42.
  • a Kurzformer 40 in which the paper pulp is sprayed onto the surface of a round screen 44 with a headbox 42.
  • a multi-ply security paper 50 like one of the paper machines of the Figures 1 or 2 can be made is in Fig. 3 shown in cross section.
  • the security paper 50 includes a first paper ply 52 that is shared by a wide security tape 54 and a thinner second paper ply 56 that covers one side of the first paper ply 52.
  • the first paper layer 52 is provided with a watermark and the security tape 54 has a hologram or a hologram-like diffraction structure.
  • the thin second paper layer 56 serves as a reinforcement in the region of the security band 54.
  • the second paper layer covers the first paper layer.
  • an interruption 58 is introduced into the second paper layer 56, whose width or diameter 60 is smaller than the width 62 of the security band 54.
  • the interruption 58 may be formed, for example, in the form of a strip-shaped opening with a width of 60, but also in the form of individual openings of any shape.
  • the dimension 60 then corresponds to the extent of the openings perpendicular to the running direction of the safety belt 54.
  • the interruption 58 as a linear hole pattern shows Fig. 4 (a) the security paper in cross section and the FIGS. 4 (b) and 4 (c) Supervision on the front and back of the security paper.
  • Fig. 5 shows a security paper 64, in which, unlike the example of the Fig. 4 not a wide security band, but a narrow security thread 66 is embedded with a width of 1.5 mm or less. With such security threads, the back sheet formation in the first paper machine 12 is not suppressed, so that the security thread 66 does not divide the first paper layer 52, but is embedded in it and freely accessible only from one side.
  • the first paper layer 52 may include a watermark, additional openings or other authenticity marks.
  • a watermark 68 a watermark 68
  • the second paper layer 56 is interrupted in the area of the watermark 68 with advantage to increase the visibility of the watermark.
  • a wide security band in the security paper of the Fig. 6 be introduced.
  • the pores of the round screen of the second sheet forming unit are closed in partial areas. This can, as in Figs. 7 (a) and (b) shown by a glued to the jacket of the round screen 44 net strip 70 with covered in the form of the desired openings areas 72 done.
  • the cover strip 70 may also be formed completely impermeable to produce a strip-shaped interruption.
  • the holes of the Siebober components can be closed at the desired locations with a Lackaufdruck.
  • a screen-applied paint layer can easily after job completion again be washed out and the screen for the next order with a new coat of paint are provided.
  • a running on the Siebachse 46 cover ring 74 is provided with closed and perforated portions in the interior of the round screen 44, which presses radially outward against the screen jacket and thus prevents sheet formation in the closed portions.
  • interruptions 58 are generated in the second paper layer 56, which have a non-adjustable by punching or cutting deckle edge.
  • the security thread or the security tape runs on the second sheet forming unit, for example the short former 40.
  • the round screen of the second sheet forming unit can be taped in the area of the security thread or safety bands or the incoming security element can cover the round screen itself accordingly.
  • the thicker first paper web can be formed in this variant with or without a continuous opening in the region of the security element.
  • FIG Fig. 9 An example of a security paper 80 produced according to this production variant is shown in FIG Fig. 9 shown.
  • the first and second paper layers 82 and 84 are shown for illustration only with different hatchings, they appear on the finished security paper 80 as a uniform paper layer in appearance.
  • the security element 86 arranged in the gap of the second paper layer 84 is visible from both sides of the security paper through the interruption 88 in the first paper layer 82 and can be seen on both sides, for example Pages have optically variable elements. If necessary, the security element 86 may be secured with an adhesive in the gap of the second paper ply.
  • the strip-like interruption or the other generated openings of any shape can be filled with polyurethane after drying the security paper.
  • FIG. 10 A modification of the multilayer security paper of Fig. 9 , in which the interruption can be exposed at any time after manufacture, is in Fig. 10 shown.
  • a security element 86 separating this paper layer and a strip-shaped interruption 88 in the first paper layer 82 are produced.
  • a release strip 90 was additionally introduced in papermaking, on the back of which a thin paper layer 92 has formed. The release strip 90 may be peeled off the finished security paper together with the paper deposit 92 like a tearing thread and leaves a subsequently inserted opening in the first paper layer 82 which releases the view of the security element 86.
  • a relatively thick paper layer formed on a DC round screen, into which watermarks, apertures or security element may be incorporated, may be combined with two or more thinner paper layers formed on further forming units, in particular the short formers described above.
  • These paper layers can be produced with separate sheet forming units or even produced by separate headboxes on the same Kurzformer.
  • fig.11 shows in (a) a three-ply security paper 100 in cross-section and in (b) in plan view.
  • a security strip or a wide security tape 104 is introduced in the manner described above.
  • Two different colored thin paper layers 106 and 110 are applied to the first paper layer 102 using two short formers.
  • strip-shaped interruptions are introduced by masking the round screens of the respective Kurzformer.
  • the round screen of the first Kurzformers is provided with vertical adhesive strips to produce strip-shaped interruptions 108 in the second paper layer 106.
  • the round screen of the second Kurzformers is taped with horizontal strips, whereby strip-shaped interruptions 112 are formed in the third paper layer 110, which are perpendicular to the strip 108 of the second paper layer 106.
  • the designations "horizontal” and “vertical” for the adhesive strips refer to the axis of the respective short forming sieve.
  • the second paper layer 106 is colored reddish, while the first and third paper layers 104 and 110 are white.
  • the reddish coloration of the second paper layer 106 shines through the thin third paper layer 110 and produces a slightly reddish appearance.
  • the view of the second paper layer 106 is released, so that a more powerful red color appears there.
  • the red color is absent so that these points produce a vertical white stripe pattern against a reddish background.
  • the crossing regions 116 of the two interruption patterns the surface of the first paper layer 102 is exposed.
  • the view of the surface of the security tape 104 is released in the crossing regions 118, so that further authenticity features can be recognizable there.
  • a security paper according to another variant is in Fig. 12 shown in supervision.
  • a first Kurzformer generates a paper layer 122 with strip-shaped interruptions and a second Kurzformer generates a complementary paper layer 124 also with strip-shaped interruptions, so that the two strip-shaped paper layers 122,124 complement each other to a full-surface paper layer 120.
  • the paper layers 122, 124 are formed in particular from different fibers, for example from fibers of different colors, different lengths or from fibers with different feature additions.
  • the paper layer 120 may also be combined with a third, homogeneous paper layer or with further layers of paper or plastic.
  • the security paper 130 uses paper layers of different thicknesses and with different fiber lengths.
  • the middle paper ply 132 is formed on a DC short fiber screen. This paper layer 132 occupies about 2/3 of the total thickness of the security paper 130. It is provided in a partial area with a watermark 134, which is sharply contoured due to the short fibers used and appears with a pronounced watermark effect.
  • the middle paper layer 132 is connected to two thinner paper layers 136, which are produced, for example, with a Kurzformer. For their production longer fibers are used, which give the multilayer structure 130 a particularly high tensile strength.
  • a thicker paper layer 142 of the security paper 140 is provided with a watermark 144.
  • two mutually complementary Kurzformerlagen 146 and 148 are applied, wherein the first Kurzformerlage 146 has a strip-shaped interruption in the region of the watermark 144, in which the second Kurzformerlage 148 comes to rest.
  • the second short former layer 148 is formed with transparent fibers, in the example with suitable polymer fibers, by which the watermark region 144 is at the same time well protected and clearly visible.
  • FIGS. 15 to 20 Another way to produce security paper on a Doppelrundsiebsystem with high speeds, is now with reference to the FIGS. 15 to 20 explained.
  • Fig. 15 schematically shows a similar to in Fig.1 constructed Doppelrundsiebsystem 150 with a first round screen 152 and a second round screen 154 for producing a first and second Paper web 156 and 158, which are brought together and connected to each other in the region of the pressure roller 160.
  • the first-round sieve 152 is usually designed individually for the production of various security papers.
  • the second paper web 158 is in the grammage range of approximately 10 to 45 g / m 2 , then it has proven to be particularly effective if the second paper web 158 is produced homogeneously, that is to say with velin character, since then the second round sieve 154 can be made homogeneous , In particular, in this case eliminates the need to adjust the second round sieve 154 respectively to the individual design of the first round sieve 152. This makes it possible to optimize the technical structure to a stable and maintenance-free production of just this Velinpapiers low grammage. A project-individual design of Zweitrundsiebs 154 is then only with considerable effort or not possible.
  • an individualization of the second paper web is desired. If, for example, an opening of the paper to the second round sieve side takes place in addition to an opening of the first-round sieve side and this opening takes place in the wet end, in general the second round sieve 154 must be individualized. Earlier, possibilities were already given to achieve this individualization by partially closing the holes of the second round screen. These options are particularly useful when the Zweitrundsiebö réelle in paper web running direction without any registration can be placed differently on each document produced.
  • the second round sieve opening is to be located at specific, predetermined locations of the documents produced. If, on the other hand, the above-described Procedure the circumference of the second round screen to be adapted to the first round screen and operated in register and speed of rotation to match the first round screen. This brings a considerable effort in the establishment of paper machines as well as the Siebher too and the screen change with it.
  • a perforated plate roller 170 is provided in the embodiment, the in Fig. 16 again shown separately.
  • the perforated plate roller 170 has a sheet-metal drum 172 in paper web width, which has holes 174 in a desired arrangement and size and which is further provided with a vacuum suction port 176.
  • the perforated plate roller 170 is rotatably mounted and arranged between the second round screen 154 and the first round screen 152 at a small distance from the pick-up felt, on which the second paper web 158 is guided to the pressure roller 160.
  • the circumference of the plate drum 172 corresponds to the length of a printing sheet and is thus in register with the first-round sieve 152.
  • the perforated plate roller 170 is driven in register with the first-round sieve 152 in order to maintain the registration.
  • Paper fibers can be sucked out of the second paper web 158 via the vacuum suction connection 176 and the bores 174 so that new effects in the register for the first paper web 154 can be achieved.
  • the example of the Fig. 17 a security paper 180 having a first paper layer 182 with a watermark 184 and a second paper layer 186 applied to the first paper layer.
  • paper fibers were removed in the wet end of the paper machine 150 from the second paper layer 186 in register with the watermark 184 that the watermark 184 is clearly visible.
  • a punctual complete removal of the fibers of the second paper layer 186 comes into consideration, as with the security paper 190 of Fig. 18 shown. In the extracted areas 188, the first paper layer 182 is completely exposed.
  • the partial or complete removal of the paper fibers of the second paper web can be combined, in particular together with openings of the first paper web, with the introduction of various security elements, such as pendulum security threads, two-sided security threads or side-by-side two-sided security elements.
  • the security element can have an element in the paper web running direction which is in register with the document to be produced.
  • the security element is then introduced in the longitudinal register, which can be realized for security threads, for example with a direct thread drive.
  • Fig. 19 shows a security paper 200 having a plurality of see-through openings 202, which are formed by register openings arranged in the first and second paper layers 204 and 206, respectively.
  • the see-through openings 202 For example, after paper making, one or both sides may be closed with a transparent or translucent film 208.
  • the two-sided security thread 212 is inserted so that it lies completely on the first felt side.
  • the see-through opening 214 formed by the register-containing openings of the first and second paper layers is then closed by the security thread 212 from the inside when the perforated plate roller 170 is operated accordingly. From the two opposite sides of the security paper 210 then each of the top and bottom security features of the security thread 212 can be seen.
  • the inspection opening (s) of the Figures 19 or 20 can also be designed with a foil thread element, which is inserted in the correct side and / or stands in the longitudinal register for the document to be produced.
  • the perforated plate roller can also be arranged only after the merger point of the first and second paper web and there suck the paper fibers of the second, thinner web through openings of the first paper web.
  • Fig. 21 shows for this purpose a portion of a paper machine for producing multi-layer security paper, such as in Fig. 2 illustrated paper machine. It is in addition to those already associated with Fig. 2 described elements arranged a suction cup 220 above the support 48 to lift the sheet formed clean from the round screen 44.
  • the suction cup 220 generates for this purpose a negative pressure, which in the example by 0.2 bar is greater than the negative pressure in the interior of the round screen 44.
  • the sheet is thereby pulled upwards by the suction cup 220 onto the carrier screen 48 and detached from the round screen 44 cleanly and without cracks.
  • FIG. 22 shows a portion of a paper machine for producing multi-layer security paper, in which over the round screen 18, a suction cup 230 is arranged floating with a small distance.
  • the floating arrangement protects the round screen 18 and the watermark types. Since the suction cup 230 is not seated on the round screen, it must be additionally driven by its own drive, with a register-synchronism with the round screen 18 is advantageous.
  • the distance of the suction cup 230 to the round screen is preferably less than 1 mm at a paper thickness of about 0.7 mm.
  • the Gautsche 230 is therefore raised in watermark areas of the paper in which the paper thickness can be up to 1.2 mm, so that it does not touch the screen in these areas.
  • Such a suction cup 230 can be advantageously used, for example, in the production of watermarked watermark in security paper.
  • the suction cup 230 includes, as in the cross section of Fig. 23 represented a perforated bronze jacket 232 of a thickness of about 2 cm.
  • the openings 234 in the bronze shell have a diameter of about 6 mm.
  • the bronze shell 232 is surrounded by a perforated blanket 236 and a felt 238 of defined permeability.
  • the uniformity of the watermark in a multi-ply security paper can also be determined using the in Fig. 24 (a) better showed 240 sieves.
  • the screen 240 has a correspondingly arranged sequence of elevations 242 and depressions 244 for generating a bar water mark.
  • grooves 246 are milled, which facilitate the paper removal from the screen 240. It has been found that the grooves 244 result in a more regular deposit of pulp on the wire, an improved decrease and thus a more uniform brightness of the generated watermarks in the raised paper web 248 (FIG. Fig. 24 (b) ) to lead.
  • register-containing openings in the paper layers can be produced, for example, by means of the above-described perforated plate roller.
  • a method according to the invention for producing a passage opening in a multilayer security paper will now be described with reference to the illustration of FIG Fig. 25 explained.
  • Fig. 25 shows an intermediate stage in papermaking in which a first and second paper web 250 and 252 are already merged and bonded together.
  • first, thicker paper web 250 is an opening 254 introduced
  • the second paper web 252 is formed homogeneously and without individualization.
  • the two paper webs 250, 252 run on a first felt 256, which is acted upon in the regions 258 outside the opening 254 with a suction pressure S 1 .
  • a suction pressure S 2 At a second, on the second paper web 252 resting felt 260 is a suction pressure S 2 upwards.
  • the suction pressure S 1 is greater than the suction pressure S 2 , so that the second paper web 252 in the areas 258 can not be lifted off the second felt 260.
  • a luminescent substance is homogeneously distributed in the volume of the paper layer in at least one of the paper layers and this paper layer has different paper thicknesses at least in a partial region, as illustrated below by some exemplary embodiments.
  • Fig. 26 shows a value document 300, here a banknote, in which a bar watermark 302 is incorporated in the form of a bar code.
  • Fig. 27 shows the value document 300 in section along the line A - A and reflects the layer structure of the security paper used.
  • the security paper accordingly has a homogeneous first paper layer 304 and a second paper layer 306 connected thereto with a stepped profile.
  • the ridges 308 of the second paper layer i. the thicker paper areas appear darker in transmitted light
  • the pits 310 i. the areas with thinner paper appear brighter in transmitted light.
  • a luminescent substance 312 is homogeneously distributed in the second paper layer 306.
  • This variant of the security paper can be produced by different methods.
  • a barcode can be embossed into the second paper web, into which the luminescent substance has been homogeneously incorporated, and, on the other hand, a watermark in the form of a barcode can be introduced into the second paper web on the round screen during paper web formation.
  • a feature substance or else a combination of feature substances of the abovementioned type can be introduced into the second paper web.
  • Fig. 28 shows the structure of a value document according to another illustrative example in cross section.
  • the value document 320 shows the same appearance as the one in FIG Fig. 26 illustrated value document, however, the second paper layer 306 here through openings 322 and the first paper layer also contains a luminescent substance 324, which may be different in particular from the luminescent substance 312.
  • the first and / or second paper layer may also comprise one or more further feature substances of the type described above.
  • the first layer may contain a luminescent substance and the second layer may contain a feature substance.
  • the preparation of this variant can be carried out according to the production of security paper with window threads, as stated above.
  • two sheets, an upper and a lower sheet are formed and joined together, wherein in the upper sheet windows are inserted and the lower sheet is made over the entire surface.
  • the desired luminescent and feature substances are incorporated into the sheets.
  • the windows in the top sheet can be produced even after its production by punching, cutting or the like.
  • Fig. 29 shows a two-layered structure of a value document 330, as it is in a section along AA in Fig. 26 results.
  • both paper layers have bar watermark.
  • the second paper layer 306 contains a luminescent substance 312, the first paper layer 304 contains one of 312 different luminescent substance 324 and, moreover, a feature substance 332.
  • further luminescent substances can be present independently of one another in the first and / or second layer and optionally independently one or more feature substances are incorporated into each other in the first and / or second position.
  • the bars of the different layers can be congruent or even aligned with gaps.
  • the thickness modulations in both layers can be realized by means of windows.
  • Fig. 30 shows a measurement signal 340, as it results in the authenticity check of a value document 300 with bar watermark 302.
  • the intensities I of the measuring signal 340 are plotted on the ordinate as a function of the measuring position x, ie the position of the sensor above the document of value.
  • the emission intensity of the luminescent substance 312 is measured here. In areas with thicker paper, the signal intensity is greater than in areas with thinner paper, since more or less luminescent or feature substance is located under the sensor as a function of the paper layer thickness. If the sensor is moved across the bar watermark 302, a higher intensity is measured in the region of the thicker paper than in the area of the thinner paper, and thus a type of barcode is measured, which is represented by the measurement signal 340.
  • the measured intensity of the luminescent substance drops to zero.
  • the authenticity check for value documents 320 or 330 with different luminescent substances takes place analogously, whereby if appropriate filters are used which only let through the radiation of one of the luminescent substances.
  • FIGS. 31 to 39 show the Fig. 31 a paper machine 370 in which a first paper layer with a countercurrent rotary screen 374 and a second paper layer with a short former 372 is produced.
  • a first paper layer with a countercurrent rotary screen 374 and a second paper layer with a short former 372 is produced.
  • the first paper layer can be produced in other configurations with a DC strainer.
  • the two paper layers are brought together in the area of the take-off roll 376 and chatted with each other. Between the paper layers, a security thread 378 or a security tape supplied to the countercurrent rotary screen 374 is introduced. Openings can be introduced into the second paper layer (short former layer) 384 by means of a first suction device 380 arranged between the short former 372 and the countercurrent circular sieve 374. If desired, by means of an optional second suction device 382, which is arranged after the merging point of the two paper layers, also openings in the first paper layer (Gegenstromrundsieblage) can be introduced.
  • Fig. 32 shows a section of a two-ply security paper 350 in supervision, as with a paper machine 370 of in Fig. 31 shown type can be produced.
  • first paper web 360 is a circular hole 354, which was preferably produced paper-making by applied to a round screen E-types.
  • second paper layer 358 which was preferably produced by means of a Kurzformers, there are star-shaped openings 356. These openings were generated in the embodiment by means of a perforated suction roll 380, which removed the paper fibers from this second paper web while still wet.
  • the shapes of the two openings 354 and 356 can be configured as desired. The position of the openings to each other and their size can be controlled according to the requirements.
  • the two openings can come to lie one above the other so that a see-through window is created. Of course, they can also be arranged side by side. Of course, the openings may be larger or smaller or equal in size relative to each other.
  • a band-shaped security element 352 for example a wide security thread, between be embedded in the paper webs.
  • the band-shaped security element 352 is covered by the first and second paper layers and is visible only in a plan view of the openings 354 and 356.
  • Fig. 32 (b) shows the cross section of the security paper along the line A - A.
  • the band-shaped security element 352 is covered by the second paper layer 358 and the first paper layer 360 and is accessible at the openings 354 and 356.
  • the size of the openings can correspond to the width of the security band. But it is also quite possible that one or both openings is wider or narrower than the band-shaped security element is / are.
  • the two paper layers are a short-former layer 358 and a countercurrent circular layer 360, between which a security thread 352 is embedded, then the different relative sizes of the openings in the short-form layer and the countercurrent circular layer, the width of the security thread 352 and the relative arrangement of the Both openings and possible features of the security thread a variety of possible designs, all with the paper machine 370 of Fig. 31 can be produced (or in other embodiments, with a paper machine in which the first paper layer is generated by a DC strainer).
  • openings 356 are generated in the short former position by the first suction device 380, which can represent any desired shapes, for example also characters, symbols or the like.
  • a thread 352 is introduced, which rests on an E-type.
  • the E-Type is chosen so high that fibers can "float" under the introduced thread and thus the thread is in the range of E types open.
  • the symbolsstromrundsiebö réelleen 354 are always narrower than the thread width formed in this variant.
  • the forms of Short form ply opening 356 may be narrower than the thread width, as in FIG Fig. 32 (a) shown, or even wider.
  • the orifices 356 may be aligned in positional accuracy with the countercurrent vents 354, as in FIG Fig.
  • this variant shows a see-through window, the size of which is limited by the openings 354 in the counter-current round sieve layer, see Fig. 32 (b) , The desired shape 356 can be seen only in the incident light from the side of the short-form position.
  • this variant provides a substrate in which the introduced security thread 352 is partially open on both sides. A see-through window is then formed only when opposing openings overlap randomly.
  • the openings 354 are always formed in the Schwarzstromrundsieblage greater than the openings 356 in the Kurzformerlage, the openings 354 may be narrower or wider than the thread width.
  • the short form liner openings 356 may be as in FIG Fig. 33 be positioned accurately to the openings 354 or lie randomly between these openings or overlap with them.
  • a see-through window results only in positionally accurate alignment of the two openings.
  • the shape of the shaper openings 356 is visible from both sides of the substrate. If the openings are not aligned with positional accuracy, a substrate with a security thread 352 partially exposed on both sides results again.
  • FIG. 34 illustrated variant openings 356 are introduced into the Kurzformerlage as described above, while the Gegenstromrundsieb has neither E types nor an embossing.
  • register control for example, by means of register marks 362 done can, the openings 356 are aligned in the Kurzformerlage on certain locations of the Schwarzstromrundsieb supplied security thread 352. For example, a negative writing 364 of the security thread 352 can be seen in the openings 356 of the short former layer.
  • Fig. 35 shown in cross-section 358 openings 356 are introduced into the Kurzformerlage and fed a security thread 352 on Gegenstromrundsieb.
  • the countercurrent rotary screen 374 is provided with an embossing, the webs of which are preferably in register with the short former position openings 356, so that the generated window openings 354 in the countercurrent circular layer 360 and the openings 356 in the short former position 358 alternate on both substrate sides.
  • an opening is first introduced into the short-former layer in the manner described and the short-former layer and the countercurrent circular layer layer are covered with the security thread. After the removal of the entire paper layer, an opening is sucked out through a second suction device 382 in the region of the security thread.
  • the openings of the two paper layers can be in register with each other or arranged randomly.
  • the sixth variant is similar to the third variant, however, the symbolsstromrundsieb is provided in this variant with a watermark embossing, which falls on the region of the incoming thread.
  • the first suction device 380 openings of any shape are sucked out of the Kurzformerlage, so that the thread is exposed in the extracted areas.
  • By registering watermarks and short former apertures it can be achieved, for example, that the watermarks of the countercurrent circular sieve layer lie around the sucked-out openings.
  • any shaped openings of the device 380 may be filled with a material, such as fibers, plastic granules or rubber, and the material may be transferred to the wet short-form web by over-pressure or adhesion.
  • the paper web is vergautscht with the Gegenstromrundsieblage with thread. The introduced material then appears in transmitted light as a dark shape. If an oil is applied as a material, the mold may also appear semitransparent in the dried substrate.
  • the diameter of the first or second suction device 380, 382 is dependent on the arc length and is suitably chosen as large as possible in order to keep the rotational speed as low as possible. However, the maximum possible diameter is also limited by the space between Kurzformer 372 and Gegenstromrundsieb 374. Since at a small diameter, the contact surface to the Kurzformerlage 384 will also be small, it may be advisable, especially in confined spaces, not to make the suction 380 round, but form in trapezoidal or triangular shape, as in Fig. 36 shown.
  • Absaugformen 386 are mounted on a flexible base material 388. The drive takes place in the embodiment via a chain 390th
  • FIGS. 37 to 39 Particularly expedient embodiments of a suction device 380 will now be described with reference to the FIGS. 37 to 39 described.
  • the embodiments shown there represent a Absaugrad 380, which consists of several segments 400 to 406 is composed.
  • Fig. 37 shows a section of a Absaugrads 380 in side view
  • Fig. 38 a similar Absaugrad 380 with a slightly different design of the removal openings 408 and channels 414 in the region of such an opening in supervision
  • FIGS. 39 (a) and (b) Side views of the middle segments 402 and 404 of FIG Fig. 38 in the direction of the lines AA and BB of Fig.
  • the locations marked with the reference symbols 416 and 418 denote those in the cross-sectional views of FIG Fig. 39 (a) or (b) visible edges.
  • Side view shown corresponds to the side view of the cover plate 406 in the direction of the line CC of Fig. 38 ,
  • the Absaugrad 380 has a sandwich construction of a plurality of segment plates, through which a variety of shapes for the removal openings 408 can be achieved.
  • the Absaugrad consists of a first cover plate 400, two intermediate plates 402 and 404, and another cover plate 406.
  • the plates 400 to 406 may be made of metal or an impact resistant, not too brittle plastic and using a laser beam, a water jet or the like Be made technology.
  • the plates are screwed, with the seal optionally a Sprühdichtmasse and / or sealing rings are used.
  • the circumference of the Absaugrads 380 corresponds to the arc length of the paper layer to be processed in the wet state.
  • After screwing the Absaugrad 380 is inserted and fixed to a guide shaft, not shown. If necessary, several suction wheels can be pushed and fixed on the guide shaft.
  • the guide shaft is driven centrally and in preferred embodiments runs synchronously with the web speed.
  • the removal openings 408 and the channels 414 must be cleaned.
  • a trough 392 with filtered water ( Fig. 31 ) which passes through the suction wheel 380 in the opposite region of the suction.
  • the vacuum is in the embodiment with a fixed vacuum device 394 ( Fig. 31 ), which grinds on the surface of the cover plate 406. The suction thus acts via one of the channels 414 only at the removal opening 408 which is in contact with the paper web 384.
  • the intermediate plates which can be put together in any number, thereby generating the shape of the removal openings per se.
  • the width of the opening can be adjusted. For example, a 10 mm wide opening by two intermediate plates ä 5 mm, or by five intermediate plates ä 2 mm are produced.
  • the cover plates 400, 406 serve to limit the boundary and the application of the vacuum. While in Fig. 38 just a cover plate 406 has a channel opening, such openings may of course also be provided in both cover plates, in which case on both sides of Absaugrads 380, a vacuum device 394 would be arranged.
  • the suction devices 380 and 382 may also be coated with a flexible plastic mask in which not only comparatively coarse but also very fine patterns, such as alphanumeric or abstract characters, may be recessed.
  • continuous patterns such as meander shapes or continuous texts, or even accurately arranged patterns, such as value specifications in a banknote, can be generated in the paper layers.
  • the mentioned patterns can be arranged in one of the paper layers or congruent or offset in both paper layers.
  • Embodiment 1 Multi-ply security paper for the production of security or value documents, such as banknotes, ID cards and the like, characterized in that in a first paper layer an endless security element is introduced, which is freely accessible on at least one side of the paper layer, that the first paper layer on the freely accessible side of the security element is covered by a second paper layer, and that the second paper layer has one or more openings in the region of the security element.
  • Embodiment 2 Security paper according to embodiment 1, characterized in that the extent of the opening (s) perpendicular to the running direction of the endless security element is smaller than its width.
  • Embodiment 3 Security paper according to embodiment 1 or 2, characterized in that the first paper layer has a watermark and the second paper layer is interrupted in the region of the watermark.
  • Embodiment 4 Security paper according to at least one of the embodiments 1 to 3, characterized in that the endless security element is equipped with optically variable effects, in particular with a diffraction structure, a hologram, a color shift effect or another interference layer effect.
  • Embodiment 5 Security paper according to at least one of the embodiments 1 to 4, characterized in that the endless security element is provided with a printed image, in particular positive or negative characters.
  • Embodiment 6 Security paper according to at least one of the embodiments 1 to 5, characterized in that the endless security element is a wide security band which divides the first paper layer.
  • Embodiment 7 Security paper according to at least one of the embodiments 1 to 5, characterized in that the endless security element is a narrow security strip which is embedded in the first paper layer.
  • Embodiment 8 Security paper according to at least one of embodiments 1 to 7, characterized in that the first paper layer has a grammage of 60 to 80 g / m 2 , in particular of 65 to 70 g / m 2 , and the second paper layer has a grammage of 15 to 45 g / m 2 , in particular from 20 to 25 g / m 2 .
  • Embodiment 9 Security paper according to at least one of embodiments 1 to 7, characterized in that the first paper layer has a grammage of 15 to 45 g / m 2 , in particular from 20 to 25 g / m 2 , and the second paper layer has a grammage of 60 to 80 g / m 2 , in particular from 65 to 70 g / m 2 .
  • Embodiment 10 Security paper according to at least one of the embodiments 1 to 9, characterized in that the endless security element is fixed with an adhesive in the first paper layer.
  • Embodiment 11 Security paper according to at least one of the embodiments 1 to 10, characterized in that the second paper layer in the region of the security element has a strip-shaped opening which is optionally closed by a tear-open release strip.
  • Embodiment 12 Security paper according to at least one of the embodiments 1 to 10, characterized in that the openings in the second paper layer are filled with a transparent material, in particular a polyurethane adhesive.
  • Embodiment 14 Method according to embodiment 13, characterized in that the first and / or second paper web is produced in a DC round wire paper machine.
  • Embodiment 15 Method according to embodiment 13 or 14, characterized in that the first and / or second paper web is produced in a short former in which the paper pulp is sprayed onto a round screen.
  • Embodiment 16 Method according to at least one of the embodiments 13 to 15, characterized in that the second paper web is produced on a round screen, the holes of which are closed in partial areas.
  • Embodiment 17 Method according to embodiment 16, characterized in that the holes of the round screen are closed by applying, in particular sticking, a cover strip.
  • Embodiment 18 Method according to embodiment 16, characterized in that the holes of the round screen are closed by partial printing of a lacquer layer.
  • Embodiment 19 Method according to embodiment 16, characterized in that the holes of the round screen are closed by a fitting from the inside on the lateral surface of the round screen cover ring.
  • Embodiment 20 Method according to embodiment 16, characterized in that the endless security element runs onto the round screen and closes the holes of the round screen at the accumulated points.
  • Embodiment 21 Method according to one of the embodiments 13 to 20, characterized in that the endless security element is fastened with an adhesive in the first paper layer.
  • Embodiment 22 Method according to one of the embodiments 13 to 21, characterized in that a strip-shaped opening is introduced into the second paper layer and this is optionally closed during paper production with a rupturable release strip.
  • Embodiment 23 Method according to one of the embodiments 13 to 21, characterized in that the openings in the second paper layer are filled with a transparent material, in particular a polyurethane adhesive.
  • Embodiment 24 Multi-ply security paper for the production of security or value documents, such as banknotes, identity cards and the like, characterized in that at least two paper layers produced with different fibers are combined with one another.
  • Embodiment 25 Security paper according to embodiment 24, characterized in that the at least two paper layers produced with different fibers are formed with mutually complementary interruptions, and complement each other to a combination paper layer which has no greater thickness than the at least two individual layers.
  • Embodiment 26 Security paper according to embodiment 24, characterized in that the at least two paper layers produced with different fibers have interruptions in the form of vertical or horizontal stripes and are arranged one above the other in the security paper.
  • Embodiment 27 Security paper according to at least one of the embodiments 24 to 26, characterized in that the at least two paper layers are formed from fibers of different colors, different lengths or fibers with different feature additions.
  • Embodiment 28 Security paper according to embodiment 24, characterized in that a first, containing a watermark paper layer is formed from short fibers, and a second, thinner paper layer to increase the tensile strength of long fibers is formed.
  • Embodiment 29 Security paper according to embodiment 28, characterized in that the first paper layer of short fibers is embedded between two thinner paper layers with long fibers.
  • Embodiment 30 Security paper according to embodiment 24, characterized in that a first paper layer containing a watermark is covered by a second paper layer, which is formed in the region of the watermark with transparent fibers and outside the watermark region with ordinary, non-transparent fibers.
  • Embodiment 31 Security paper according to one of the embodiments 24 to 30, characterized in that the at least two paper layers produced with different fibers are combined with further full-area or interrupted paper layers.
  • Embodiment 32 Security paper according to one of the embodiments 24 to 31, characterized in that the at least two paper layers produced with different fibers are combined with a security element which is visible through the paper layers at least in a partial area.
  • Embodiment 34 Method according to embodiment 33, characterized in that the fibers of the second paper web are only partially removed by the suction device in order to produce regions of lesser layer thickness in the second paper web.
  • Embodiment 35 Method according to embodiment 34, characterized in that the areas of reduced layer thickness of the second paper web are generated in register with watermark areas of the first paper web.
  • Embodiment 36 Method according to embodiment 33, characterized in that the fibers of the second paper web are completely removed by the suction device in order to produce openings in the second paper web.
  • Embodiment 37 Method according to embodiment 36, characterized in that the openings of the second paper web are produced in the register to openings of the first paper web, and in particular to supplement through-holes.
  • Embodiment 38 Method according to embodiment 36 or 37, characterized in that the register-containing openings of the first and second paper web are combined with a security element whose respective security features can be recognized from both sides of the security paper.
  • Embodiment 39 Method according to embodiment 38, characterized in that the security element is a two-sided security element, in particular a pendulum security thread, a double hologram security thread or a double color layer security thread.
  • the security element is a two-sided security element, in particular a pendulum security thread, a double hologram security thread or a double color layer security thread.
  • Embodiment 40 Method according to embodiment 38 or 39, characterized in that the security element is introduced between the first and second paper webs.
  • Embodiment 41 Method according to at least one of the embodiments 33 to 40, characterized in that the suction device sucks the paper fibers of the second paper web on their way to the first paper web.
  • Embodiment 42 The method according to at least one of the embodiments 33 to 40, characterized in that the suction device sucks the paper fibers of the second paper web after merging with the first paper web, preferably through openings of the first paper web.
  • Embodiment 43 The method according to at least one of the embodiments 33 to 42, characterized in that the first paper web is produced on a round screen, and the suction device is driven in register to the round screen of the first paper web.
  • Embodiment 44 The method according to at least one of the embodiments 33 to 43, characterized in that the suction device is formed in a trapezoidal or triangular shape.
  • Embodiment 45 Method according to at least one of the embodiments 33 to 43, characterized in that the suction device is constructed as a suction wheel composed of several segment plates.
  • Embodiment 46 Suction device for producing thin areas or openings in a moist paper web in papermaking, with removal openings for sucking a substance / water mixture from the wet paper web, characterized in that the suction device is formed by a composite of several segment plates Absaugrad, wherein at least one, the removal openings forming intermediate plate and two cover plates are provided for limiting the edge.
  • Embodiment 47 Suction device according to embodiment 46, characterized in that at least a part of the segment plates with the removal openings each have connected channels for the extraction of the substance / water mixture.
  • Embodiment 48 Suction device according to embodiment 46 or 47, characterized in that the areas adjacent to the removal openings areas of the intermediate plates are recessed.
  • Suction device characterized in that a stationary vacuum device is provided which grinds in operation on the surface of at least one of the cover plates of the rotating Absaugrads and the suction for one of Channels is connected to the each in contact with the paper web removal opening.
  • Embodiment 50 Suction device according to at least one of the embodiments 46 to 49, characterized in that the suction device is coated with a flexible plastic mask having recesses in the form of patterns, characters or codes in the region of the removal openings.
  • Embodiment 51 A method for producing a security paper, in which a paper web is formed in a wet end of a paper machine on a round screen and lifted off the round screen by means of a carrier tape, characterized in that the lifting of the paper web from one in the immediate vicinity of the round screen and with short distance Supporting device arranged to the carrier tape is supported.
  • Embodiment 52 Method according to embodiment 51, characterized in that a negative pressure is generated in the suction device, which is at least 0.1 bar, preferably by about 0.2 bar greater than the negative pressure in the interior of the round screen.
  • Embodiment 53 Method according to embodiment 51 or 52, characterized in that the suction device is formed by a rotatable suction roll, which is preferably driven in register-synchronism with the round screen of the wet end.
  • Embodiment 54 Method according to embodiment 53, characterized in that the suction roll has a perforated roll shell, the surrounded by a perforated blanket and a felt of defined permeability.
  • Embodiment 55 Method according to at least one of the embodiments 51 to 54, characterized in that a watermark is introduced into the paper web on the round screen.
  • Embodiment 56 Method according to embodiment 55, characterized in that the distance of the suction device to the round screen in the region of the watermark is adapted to the local paper thickness.
  • Embodiment 57 Screen for paper production in a paper machine, which has elevations and depressions for producing watermark areas, characterized in that structuring is provided in the recesses, which facilitates paper removal from the screen.
  • Embodiment 58 Screen according to embodiment 57, characterized in that the elevations and depressions for generating Balkenwasser Lake are arranged bar-shaped side by side.
  • Embodiment 59 Screen according to embodiment 57 or 58, characterized in that the structuring is formed by grooves, in particular by grooves milled into the recesses.
  • Embodiment 63 Multi-ply security paper for the production of security or value documents, such as banknotes, identity cards and the like, characterized in that in at least one first paper layer of the security paper, a luminescent substance and optionally a further feature substance are homogeneously distributed in the volume of the paper layer and this first paper layer has at least two different paper thicknesses at least in a partial area.
  • Embodiment 64 Security paper according to embodiment 63, characterized in that a second paper layer of the security paper has different paper thicknesses at least in partial regions.
  • Embodiment 65 Security paper according to embodiment 64, characterized in that the paper thickness variations of the first and second paper layers complement each other to a constant total thickness of the security paper.
  • Embodiment 66 Security paper according to at least one of the embodiments 63 to 65, characterized in that the different paper thicknesses are visually imperceptible.
  • Configuration 67 Security paper according to at least one of the embodiments 63 to 66, characterized in that the areas with different paper thicknesses are at least partially overprinted.
  • Embodiment 68 Security paper according to at least one of the embodiments 63 to 67, characterized in that the different paper thicknesses are present as watermarks.
  • Embodiment 69 Security paper according to embodiment 68, characterized in that the watermark is a Balkenwasser Lake.
  • Embodiment 70 Security paper according to at least one of the embodiments 63 to 67, characterized in that the different paper thicknesses are produced by incorporating windows.
  • Embodiment 71 Security paper according to at least one of the embodiments 63 to 70, characterized in that the first paper layer contains a plurality of luminescent substances.
  • Embodiment 72 Security paper according to at least one of embodiments 63 to 71, characterized in that the second paper layer contains the same luminescent substance as the first layer and / or at least one luminescent substance different from the luminescent substance of the first layer.
  • Embodiment 73 Security paper according to at least one of embodiments 63 to 72, characterized in that the luminescent substance or substances are transparent in the visual spectral range.
  • Embodiment 74 Security paper according to at least one of the embodiments 63 to 73, characterized in that the first and / or second layer comprises at least one further feature substance.
  • Embodiment 75 Security paper according to at least one of the embodiments 63 to 74, characterized in that the feature substance comprises at least one further substance with machine-readable properties.
  • Embodiment 76 Security paper according to embodiment 75, characterized in that the machine-readable property is an electrical and / or magnetic property.
  • Embodiment 77 A method for producing a multilayer security paper according to one of the embodiments 63 to 76 with at least one luminescent substance and optionally at least one further feature substance, characterized in that the at least one luminescent substance and optionally at least one further feature substance homogeneous in volume for the production of the The paper pulp used in the first paper layer is distributed and during the production of the first paper layer, at least two different paper thicknesses are incorporated at least in a partial region.
  • Embodiment 78 A method for checking the authenticity of a security paper according to one of the embodiments 63 to 76, characterized in that the luminescent properties of the security paper are measured by means of a sensor.
  • Embodiment 79 A method for checking the authenticity of a security paper according to embodiment 78, characterized in that additionally at least one machine-readable property of the at least one further feature substance is measured by means of a sensor.
  • Embodiment 80 Method for checking the authenticity of a security paper according to embodiment 79, characterized in that an electrical and / or magnetic property is measured as a machine-readable property.

Landscapes

  • Paper (AREA)
  • Credit Cards Or The Like (AREA)
EP08019594.4A 2005-03-23 2006-03-14 Procédé de production d'une ouverture de passage dans un papier de sécurité multicouche Not-in-force EP2031127B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102005013474 2005-03-23
DE102005045566A DE102005045566A1 (de) 2005-03-23 2005-09-23 Mehrlagiges Sicherheitspapier
EP06723411.2A EP1899527B1 (fr) 2005-03-23 2006-03-14 Papier securise a plusieurs couches et son procédé de fabrication

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EP06723411.2A Division-Into EP1899527B1 (fr) 2005-03-23 2006-03-14 Papier securise a plusieurs couches et son procédé de fabrication
EP06723411.2A Division EP1899527B1 (fr) 2005-03-23 2006-03-14 Papier securise a plusieurs couches et son procédé de fabrication

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EP2031127A1 true EP2031127A1 (fr) 2009-03-04
EP2031127B1 EP2031127B1 (fr) 2015-10-21

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EP08019594.4A Not-in-force EP2031127B1 (fr) 2005-03-23 2006-03-14 Procédé de production d'une ouverture de passage dans un papier de sécurité multicouche
EP06723411.2A Not-in-force EP1899527B1 (fr) 2005-03-23 2006-03-14 Papier securise a plusieurs couches et son procédé de fabrication
EP08019593.6A Not-in-force EP2031126B1 (fr) 2005-03-23 2006-03-14 Procédé et appareil aspirateur destiné à la fabrication de papiers de sécurité

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EP08019593.6A Not-in-force EP2031126B1 (fr) 2005-03-23 2006-03-14 Procédé et appareil aspirateur destiné à la fabrication de papiers de sécurité

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US (1) US20090001709A1 (fr)
EP (3) EP2031127B1 (fr)
CN (3) CN102154945B (fr)
DE (1) DE102005045566A1 (fr)
ES (2) ES2717631T3 (fr)
PL (1) PL2031126T3 (fr)
RU (2) RU2401208C2 (fr)
WO (1) WO2006099971A2 (fr)

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RU2007138905A (ru) 2009-04-27
CN102174782B (zh) 2014-12-10
WO2006099971A3 (fr) 2007-04-19
PL2031126T3 (pl) 2019-09-30
CN102154945A (zh) 2011-08-17
DE102005045566A1 (de) 2006-09-28
CN102154945B (zh) 2012-11-28
EP1899527B1 (fr) 2016-06-22
CN101146954A (zh) 2008-03-19
EP2031126A1 (fr) 2009-03-04
RU2433217C1 (ru) 2011-11-10
EP2031127B1 (fr) 2015-10-21
RU2401208C2 (ru) 2010-10-10
WO2006099971A2 (fr) 2006-09-28
CN102174782A (zh) 2011-09-07
EP2031126B1 (fr) 2018-12-26
US20090001709A1 (en) 2009-01-01
CN101146954B (zh) 2011-11-16
ES2556258T3 (es) 2016-01-14
EP1899527A2 (fr) 2008-03-19

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