EP3411525B2 - Method and device for producing a security paper having two window security elements - Google Patents

Method and device for producing a security paper having two window security elements Download PDF

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Publication number
EP3411525B2
EP3411525B2 EP17702520.2A EP17702520A EP3411525B2 EP 3411525 B2 EP3411525 B2 EP 3411525B2 EP 17702520 A EP17702520 A EP 17702520A EP 3411525 B2 EP3411525 B2 EP 3411525B2
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EP
European Patent Office
Prior art keywords
paper
security
endless
paper web
suction
Prior art date
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Application number
EP17702520.2A
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German (de)
French (fr)
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EP3411525A1 (en
EP3411525B1 (en
Inventor
Alexander TANTSCHER
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Giesecke and Devrient Currency Technology GmbH
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Giesecke and Devrient Currency Technology GmbH
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Classifications

    • 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
    • D21F11/008—Making apertured 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
    • 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
    • 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
    • D21H27/30—Multi-ply

Definitions

  • the invention relates to a device for producing security paper with at least two endless window security elements visible on opposite sides of the security paper.
  • Security papers or documents of value are often provided with authenticity features, such as watermarks, embedded security threads and the like, which allow the authenticity of the security paper or document of value to be checked and which at the same time serve as protection against unauthorized reproduction.
  • security threads that are neither completely applied to a surface of a security paper nor completely embedded in the security paper are referred to as window security threads. These are partially embedded in the security paper in such a way that they are only visible in certain window areas on one or both opposite surfaces of the security paper.
  • a method for producing a security paper is known.
  • a security thread is embedded between two layers of paper in a paper machine with cylinder mold.
  • the cylinder mold has bumps for forming windows in a paper layer, so that the security thread is exposed on one side of the security paper in the region of the bumps.
  • the invention is based on the object of specifying a device for producing a security paper of the type mentioned at the outset.
  • the term "security paper” refers to the unprinted paper, which is usually in a quasi-continuous form and is processed further at a later point in time.
  • the security papers are used in particular to produce documents of value.
  • a document that is ready for its intended use is referred to as a “document of value”.
  • Value documents within the meaning of the present invention are in particular banknotes, shares, bonds, certificates, vouchers, checks, high-quality admission tickets, but also other papers at risk of forgery, such as passports and other identification documents, as well as product security elements such as labels, seals, packaging and the like.
  • the simplified designation "security paper” or "document of value” includes all such documents and product security measures.
  • the security paper is preferably designed in multiple layers and comprises at least one layer of paper.
  • the further layer or further layers can likewise be formed from paper, but also from other materials, for example plastic foils.
  • the paper or a paper layer particularly preferably comprises cotton fibers such as are used for banknotes, for example.
  • a paper layer generating device is a device, in particular a sheet forming unit, for generating a paper web.
  • the paper layer producing device can be a rotary mold machine, in particular a countercurrent rotary mold machine, a direct current rotary mold machine or a double rotary mold machine.
  • a paper layer generating device can be a fourdrinier wire machine.
  • the paper web discharged from the paper sheet forming device is preferred output as continuous paper.
  • a sheet of paper could be output.
  • the paper layer producing device can comprise a nozzle for discharging a pulp mass onto a wire unit, for example cylinder wire or fourdrinier wire, whereby a paper web is produced.
  • the endless security elements of the present invention can be formed in particular by security threads or wide security bands. While security threads have a width of less than 4 mm, usually less than 2 mm and typically around 1 mm, endless security elements with a width of 4 mm or more are referred to as security bands in the context of this description.
  • the security bands can in particular have a width of 4 mm to 20 mm, sometimes even up to 30 mm. Even if the invention is explained below primarily using the example of narrow security threads, it is always understood that the security elements can also be formed by wide security bands.
  • the embedding of wide security bands in papermaking is, for example, in the publication EPO 0625 431 described.
  • the endless security element can be, for example, a security element with a color shift effect, with a diffraction structure such as a hologram, with a dynamic effect, with a metallization that may be partially left open, and/or with a printed image.
  • the above-mentioned window areas of the second paper web are created precisely by the removal of the paper fibers from the second paper web.
  • the paper fibers are removed from the second paper web before it is brought together with the first paper web.
  • the paper fibers are advantageously removed in register with the embedding position of the second endless security element.
  • first and second endless security element it is advantageous to use security elements with different optical appearances, for example a security element with a color shift effect, with a diffraction structure such as a hologram, with a dynamic effect, with a metallization that may be partially omitted, or with a printed image. If more than two endless security elements are introduced, all of the security elements introduced preferably have a different optical appearance.
  • the second endless security element is advantageously embedded with an offset to the first endless security element that is more than twice the width of the widest embedded security element. In this way, the overall thickness of the security paper is not excessively increased by embedding the security elements.
  • the endless security elements can also be distributed uniformly over the security element, for example by arranging the security elements symmetrically to the center line of the separated security paper. Uniform distribution of the security elements makes it possible to achieve a particularly uniform paper thickness and particularly good flatness of the security paper or of the document of value produced therefrom.
  • the endless security elements can also be arranged one above the other without offset.
  • additional visual effects can be realized in the security paper, which are not possible or not readily possible with a security element alone.
  • three or more endless security elements can also be introduced into the security paper, for example by connecting a plurality or further second paper webs to the first paper web.
  • the first paper web can be provided with at least one additional security feature, which is advantageously in register with the window areas of the first paper web.
  • the second paper web can be provided with at least one further security feature, which is advantageously in register with the window areas of the second paper web.
  • watermarks, cutouts or imprinted elements can be considered as further security features.
  • the window areas of the first and second paper web are designed differently, in particular have different shapes and/or sizes.
  • more than one second paper web can also be produced in the manner described and connected to the first paper web or the other second paper webs.
  • a third paper web can also be produced in another paper layer generating device, and the third paper web can be brought together with the first and second paper web and firmly connected, with a third endless security element being embedded between the second and third paper web when the paper webs are brought together becomes.
  • Paper fibers can be removed from the third paper web while it is still wet by means of a suction and/or flushing device, so that the second and third endless security elements are freely accessible in window areas of the third paper web.
  • the suction device has an endless belt with at least one recess, which is stretched over at least two position-adjustable guide rollers.
  • the suction device preferably also contains a suction roller or a suction box for generating a negative pressure for sucking off paper fibers through the at least one recess of the endless belt.
  • the at least one recess of the endless belt corresponds to the window areas to be produced in the second paper web.
  • the flushing device has an outlet device.
  • the outlet device is designed to dispense a liquid and is directed towards the second paper web. Paper fibers are flushed away in a targeted manner via the directed dispensing of the liquid through openings, so that at least one recess is produced in the second paper web.
  • On the side of the second paper web opposite the outlet device there is a receptacle for receiving the paper fibers that have been flushed away.
  • the outlet device can be designed to act geometrically on the second paper web in the form of the recess.
  • a bearing surface which is arranged on the side of the second paper web opposite the outlet device, can have openings. The openings are designed to correspond to the recess, so that the recess is produced when the second paper web is acted upon over a large area.
  • the supporting surface is preferably an endless belt.
  • the support surface can be designed as an endless belt.
  • the endless band can be formed from a mesh-like fabric, for example made of plastic, copper or bronze, or can consist of a material that has a closed surface except for the at least one recess.
  • the suction device can also have a suction roller or a vacuum tube.
  • at least one spray tube can be arranged on the side of the second paper web opposite the suction device, which sprays a liquid onto the second paper web in order to convey the fibrous material to be suctioned off through the at least one recess in the endless belt into the suction roller or the suction box.
  • the suction device can also contain a screen conditioning system with cleaning spray pipes and suction tubes.
  • the suction and/or flushing device is advantageously arranged in the device between the second paper layer generating device and the merging position of the paper webs, so that the paper fibers can be removed from the second paper web before merging with the first paper web and embedding the second endless security element.
  • first and second endless security element have different optical appearances.
  • first and second endless security element are embedded with an offset that is more than twice the width of the widest embedded security element.
  • the endless security elements can also be arranged one above the other without offset.
  • the first and/or second layer of paper expediently has at least one further security feature which is advantageously in register with the window areas of the respective paper web.
  • figure 1 shows a schematic of a paper machine 10 with a first paper layer producing device, in the present example a cylinder mold paper machine 12 and a second paper layer producing device 14, preferably a second cylinder mold machine.
  • a paper web 20 is formed in a manner known per se on a cylinder mold 18, with a first endless security thread 22 being embedded in the paper web 20 as a window security thread during sheet formation.
  • the security thread 22 runs onto humps 26 of the cylinder mold 18 before it dips into the paper pulp 24 of the paper machine.
  • the security thread 22 is basically in an inner plane of the paper, although no paper fibers from the paper mass 24 are deposited on the contact surfaces of the security thread 22 with the humps 26, so that the paper web 20 has recessed window areas there, in which the security thread 22 is freely accessible.
  • the first paper web has, for example, a grammage of 60 to 80 g/m 2 .
  • a second, initially homogeneous paper web 30 is produced in the second paper layer production device 14 by paper pulp being sprayed onto the surface of a cylinder mold 44 with a headbox nozzle 42 .
  • the paper layer produced with the second paper layer producing device 14 is very thin and has, for example, a grammage of only 10 to 25 g/m 2 .
  • the second paper web 30 is removed from the cylinder mold 44 by means of a removal felt 16 and guided to the first paper machine 12, where it is connected to the first paper web 20 in the area of the pressure roller 36.
  • the two paper webs 20, 30 are brought together in such a way that the second paper web 30 comes to rest on the surface of the first paper web 20 opposite the recessed window areas.
  • the security thread 22 embedded in the first paper web 20 is therefore visible and freely accessible in the recessed window areas of the first paper web 20 even after the two paper webs 20, 30 have been brought together and connected.
  • a second endless security element 32 is also unwound from a spool 34 and embedded between the first 20 and second paper web 30 when the two paper webs 20, 30 are connected.
  • the second endless security element 32 is generally not placed at the position of the first endless security element 22, but with a predetermined offset ⁇ (see Fig 3 ) to the first security element 22 embedded.
  • a suction device 50 is arranged between the second paper layer generating device 14 and the pressure roller 36, which removes 32 paper fibers from the second paper web 30 in the still wet state in register with the embedding position of the second endless security element.
  • the areas of removed paper fibers form window areas in the second paper web 30, in which the second endless security element 32 is visible and freely accessible after it has been embedded between the two paper webs 20, 30.
  • the paper webs 38 connected to one another are then fed to further processing stations, such as calenders, sizing and the like.
  • a flushing device 58 for removing paper fibers can be provided.
  • the suction device 50 shown in more detail comprises an endless belt 52 of a screen-like fabric which is mechanically stretched taut by a series of guide rollers 54 which can be adjusted in position.
  • the endless belt 52 has one or more cutouts which correspond in shape and size to the window areas to be produced in the second paper web 30 .
  • a slotted suction box 56 is arranged inside the endless belt 52, with which a vacuum is generated on the endless belt 52 and paper fibers can thereby be sucked out of the second paper web through the gaps in the belt 52 and the slot of the suction box 56.
  • a suction roller or a vacuum tube can also be used.
  • the suction device 50 can contain a screen conditioning system, not shown in the figure, with cleaning spray pipes and suction tubes.
  • a multi-ply security paper 60, as with the paper machine 1 can be produced is in the Figures 3 and 4 shown in cropped form. while showing 3(a) a plan view of the top 62 and 3(b) a top view of the underside 64 of the security paper 60.
  • the side with the first paper ply 70 resulting from the first paper web 20 is referred to as the upper side, and the side with the second paper ply 80 resulting from the second paper web 30 is referred to as the underside of the security paper.
  • Elements that are embedded or on the respective opposite side of the security paper are drawn in with dashed lines for clarification.
  • figure 4 shows a section through the security paper 60 along the 3(a) shown line IV-IV, which runs approximately half in the area of the first and second security thread.
  • the security paper 60 contains a first, thicker paper layer 70 with a grammage of 60 to 80 g/m 2 , inside which a first window security thread 72 is embedded.
  • the first paper ply has window areas 74 in which the first security thread 72 is visible from the top 62 of the security paper 60 and is freely accessible.
  • the first paper ply 70 is firmly connected to a second, thinner paper ply 80, which only has a grammage of 10 to 45 g/m 2 .
  • a second window security thread 82 is embedded between the first and second paper layers 70 , 80 .
  • the second paper ply 80 has window areas 84 in which the second security thread 82 is visible and freely accessible from the underside 64 of the security paper 60 .
  • the security threads 72 and 82 are not accessible from the respectively opposite side 64 or 62 of the security paper and are also not visible in incident light.
  • the security threads each have a metallic coating, for example, into which small, pattern-shaped recesses, for example in the form of microwriting, are introduced. If these security threads are embedded in security paper that is at least partially translucent, they appear in transmitted light as dark stripes with light gaps. If a security thread is not to be visible in transmitted light, the opposite surface of the security paper can be provided with an opaque coating.
  • the two security threads 72, 82 advantageously have a different visual appearance, for example the security thread 72 has a color shift effect and the security thread 82 has a dynamic effect.
  • the two security threads 72, 82 are advantageously offset by an offset ⁇ (in 3(b) shown) separated from each other that is more than twice the width of the widest of the embedded security threads. While 3 shows an asymmetrical distribution of the security threads 72, 82, the security threads can also be arranged symmetrically to the center line of the security paper 60, so that when the security paper is turned over, a security thread is visible at the same point on the security paper.
  • the window areas 74, 84 on the front and back 62, 64 of the security paper can have different shapes and sizes.
  • the first paper ply 70 can be provided with at least one additional security feature 76 associated with the window security thread 72, which is preferably in register with the window areas 74 of the first paper web.
  • the second paper ply 80 can be provided with at least one further security feature 86 assigned to the window security thread 82, which is preferably in register with the window areas 84 of the second paper web.
  • the associated security features 76, 86 can be, for example, watermarks, gaps in the first or second paper layer, or printed elements.

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  • Paper (AREA)
  • Credit Cards Or The Like (AREA)

Description

Die Erfindung betrifft eine Vorrichtung zum Herstellen eines Sicherheitspapiers mit zumindest zwei endlosen, auf einander gegenüberliegenden Seiten des Sicherheitspapiers sichtbaren Fenstersicherheitselementen.The invention relates to a device for producing security paper with at least two endless window security elements visible on opposite sides of the security paper.

Sicherheitspapiere oder Wertdokumente werden zur Absicherung oft mit Echtheitsmerkmalen, wie Wasserzeichen, eingebetteten Sicherheitsfäden und dergleichen ausgestattet, die eine Überprüfung der Echtheit des Sicherheitspapiers oder Wertdokuments gestatten und die zugleich als Schutz vor unerlaubter Reproduktion dienen.Security papers or documents of value are often provided with authenticity features, such as watermarks, embedded security threads and the like, which allow the authenticity of the security paper or document of value to be checked and which at the same time serve as protection against unauthorized reproduction.

In der Vergangenheit haben sich dabei Echtheitsmerkmale gut bewährt, die nur während der Herstellung in das Sicherheitspapier eingebracht werden können, wie etwa Wasserzeichen, chemisch reagierende Zusätze, Melierfasern oder in das Sicherheitspapier vollständig oder teilweise eingebettete Sicherheitsfäden. Dabei werden Sicherheitsfäden, die weder vollständig auf eine Oberfläche eines Sicherheitspapiers aufgebracht, noch vollständig in das Sicherheitspapier eingebettet sind, als Fenstersicherheitsfäden bezeichnet. Diese sind teilweise so in das Sicherheitspapier eingebettet, dass sie an einer oder beiden gegenüberliegenden Oberflächen des Sicherheitspapiers nur in bestimmten Fensterbereichen sichtbar sind.In the past, authenticity features that can only be introduced into the security paper during production, such as watermarks, chemically reacting additives, mottled fibers or security threads fully or partially embedded in the security paper, have proven successful. Security threads that are neither completely applied to a surface of a security paper nor completely embedded in the security paper are referred to as window security threads. These are partially embedded in the security paper in such a way that they are only visible in certain window areas on one or both opposite surfaces of the security paper.

Aus dem Dokument WO 2005/052249 A1 ist ein Verfahren zum Herstellen eines Sicherheitspapiers bekannt. Ein Sicherheitsfaden wird in einer Papiermaschine mit Rundsieb zwischen zwei Papierlagen eingebettet. Das Rundsieb weist Höcker zum Ausbilden von Fenster in einer Papierlage auf, so dass im Bereich der Höcker der Sicherheitsfaden auf einer Seite des Sicherheitspapiers frei liegt.From the document WO 2005/052249 A1 a method for producing a security paper is known. A security thread is embedded between two layers of paper in a paper machine with cylinder mold. The cylinder mold has bumps for forming windows in a paper layer, so that the security thread is exposed on one side of the security paper in the region of the bumps.

Ausgehend davon liegt der Erfindung die Aufgabe zugrunde, eine Vorrichtung zum Herstellen eines Sicherheitspapiers der eingangs genannten Art anzugeben.Proceeding from this, the invention is based on the object of specifying a device for producing a security paper of the type mentioned at the outset.

Bei einem Verfahren zum Herstellen eines Sicherheitspapiers mit zumindest zwei endlosen, auf einander gegenüberliegenden Seiten des Sicherheitspapiers sichtbaren Fenstersicherheitselementen vorgesehen, dass

  • in einer ersten Papierlagenerzeugungsvorrichtung eine erste Papierbahn gebildet wird und dabei bei der Blattbildung ein erstes endloses Sicherheitselement als Fenstersicherheitselement in die erste Papierbahn eingebracht wird,
  • in einer zweiten Papierlagenerzeugungsvorrichtung eine zweite Papierbahn erzeugt wird,
  • die zweite Papierbahn so mit der ersten Papierbahn zusammengeführt und fest verbunden wird, dass das erste endlose Sicherheitselement in Fensterbereichen der ersten Papierbahn frei zugänglich ist,
  • beim Zusammenführen der Papierbahnen ein zweites endloses Sicherheitselement zwischen die erste und zweite Papierbahn eingebettet wird, und
  • mittels einer Saug- und/ oder Spülvorrichtung aus der zweiten Papierbahn in noch feuchtem Zustand Papierfasern entfernt werden, so dass das zweite endlose Sicherheitselement in Fensterbereichen der zweiten Papierbahn frei zugänglich ist.
In a method for producing security paper with at least two endless window security elements visible on opposite sides of the security paper, it is provided that
  • a first paper web is formed in a first paper layer generating device and a first endless security element is introduced into the first paper web as a window security element during sheet formation,
  • a second paper web is produced in a second paper layer producing device,
  • the second paper web is brought together and firmly connected to the first paper web in such a way that the first endless security element is freely accessible in the window areas of the first paper web,
  • when the paper webs are brought together, a second endless security element is embedded between the first and second paper webs, and
  • Paper fibers are removed from the second paper web while it is still wet by means of a suction and/or flushing device, so that the second endless security element is freely accessible in window areas of the second paper web.

Im Sinne der Erfindung bezeichnet dabei der Begriff "Sicherheitspapier" das unbedruckte Papier, das üblicherweise in quasi endloser Form vorliegt und zu einem späteren Zeitpunkt weiterverarbeitet wird. Die Sicherheitspapiere werden insbesondere zur Herstellung von Wertdokumenten verwendet. Dabei wird als "Wertdokument" ein Dokument bezeichnet, das für seinen bestimmungsgemäßen Gebrauch fertig gestellt ist. Wertdokumente im Sinne der vorliegenden Erfindung sind insbesondere Banknoten, Aktien, Anleihen, Urkunden, Gutscheine, Schecks, hochwertige Eintrittskarten, aber auch andere fälschungsgefährdete Papiere, wie Pässe und sonstige Ausweisdokumente, sowie Produktsicherungselemente, wie Etiketten, Siegel, Verpackungen und dergleichen. Die vereinfachte Benennung "Sicherheitspapier" oder "Wertdokument" schließt im Folgenden alle derartigen Dokumente und Produktsicherungsmittel ein.For the purposes of the invention, the term "security paper" refers to the unprinted paper, which is usually in a quasi-continuous form and is processed further at a later point in time. The security papers are used in particular to produce documents of value. A document that is ready for its intended use is referred to as a “document of value”. Value documents within the meaning of the present invention are in particular banknotes, shares, bonds, certificates, vouchers, checks, high-quality admission tickets, but also other papers at risk of forgery, such as passports and other identification documents, as well as product security elements such as labels, seals, packaging and the like. In the following, the simplified designation "security paper" or "document of value" includes all such documents and product security measures.

Das Sicherheitspapier ist vorzugsweise mehrlagig ausgebildet und umfasst wenigstens eine Lage Papier. Die weitere Lage bzw. weiteren Lagen können ebenfalls aus Papier, aber auch aus anderen Materialien, beispielsweise durch Kunststofffolien, gebildet sein. Das Papier bzw. eine Papierlage umfasst besonders bevorzugt Baumwollfasern, wie sie beispielsweise für Banknoten verwendet werden.The security paper is preferably designed in multiple layers and comprises at least one layer of paper. The further layer or further layers can likewise be formed from paper, but also from other materials, for example plastic foils. The paper or a paper layer particularly preferably comprises cotton fibers such as are used for banknotes, for example.

Im Sinne der Erfindung handelt es sich bei einer Papierlagenerzeugungsvorrichtung um eine Vorrichtung, insbesondere Blattbildungseinheit, zum Erzeugen einer Papierbahn. Bei der Papierlagenerzeugungsvorrichtung kann es sich um eine Rundsiebmaschine, insbesondere eine Gegenstromrundsiebmaschine, eine Gleichstromrundsiebmaschine oder eine Doppelrundsiebmaschine, handeln. Weiterhin kann es sich bei einer Papierlagenerzeugungsvorrichtung um eine Langsiebmaschine handeln. Die von der Papierlagenerzeugungsvorrichtung ausgegebene Papierbahn wird vorzugsweise als Endlospapier ausgegeben. Alternativ könnte ein Papierbogen ausgegeben werden. Weiterhin kann die Papierlagenerzeugungsvorrichtung eine Düse zur Ausgabe einer Pulpemasse auf eine Siebeinheit, beispielsweise Rundsieb oder Langsieb, umfassen, wodurch eine Papierbahn erzeugt wird.In terms of the invention, a paper layer generating device is a device, in particular a sheet forming unit, for generating a paper web. The paper layer producing device can be a rotary mold machine, in particular a countercurrent rotary mold machine, a direct current rotary mold machine or a double rotary mold machine. Furthermore, a paper layer generating device can be a fourdrinier wire machine. The paper web discharged from the paper sheet forming device is preferred output as continuous paper. Alternatively, a sheet of paper could be output. Furthermore, the paper layer producing device can comprise a nozzle for discharging a pulp mass onto a wire unit, for example cylinder wire or fourdrinier wire, whereby a paper web is produced.

Die endlosen Sicherheitselemente der vorliegenden Erfindung können insbesondere durch Sicherheitsfäden oder breite Sicherheitsbänder gebildet sein. Während Sicherheitsfäden eine Breite von weniger als 4 mm, meist weniger als 2 mm und typischerweise von etwa 1 mm aufweisen, werden endlose Sicherheitselemente mit einer Breite von 4 mm oder mehr im Rahmen dieser Beschreibung als Sicherheitsbänder bezeichnet. Die Sicherheitsbänder können insbesondere eine Breite von 4 mm bis 20 mm, teilweise sogar bis zu 30 mm aufweisen. Auch wenn die Erfindung nachfolgend überwiegend am Beispiel von schmalen Sicherheitsfäden erläutert wird, versteht sich stets, dass die Sicherheitselemente auch durch breite Sicherheitsbänder gebildet sein können. Die Einbettung breiter Sicherheitsbänder bei der Papierherstellung ist beispielsweise in der Druckschrift EP 0625 431 beschrieben.The endless security elements of the present invention can be formed in particular by security threads or wide security bands. While security threads have a width of less than 4 mm, usually less than 2 mm and typically around 1 mm, endless security elements with a width of 4 mm or more are referred to as security bands in the context of this description. The security bands can in particular have a width of 4 mm to 20 mm, sometimes even up to 30 mm. Even if the invention is explained below primarily using the example of narrow security threads, it is always understood that the security elements can also be formed by wide security bands. The embedding of wide security bands in papermaking is, for example, in the publication EPO 0625 431 described.

Das endlose Sicherheitselement kann beispielsweise ein Sicherheitselement mit Farbkippeffekt, mit einer Beugungsstruktur wie einem Hologramm, mit einem Dynamikeffekt, mit einer gegebenenfalls teilweise ausgesparten Metallisierung, und/oder mit einem Druckbild sein.The endless security element can be, for example, a security element with a color shift effect, with a diffraction structure such as a hologram, with a dynamic effect, with a metallization that may be partially left open, and/or with a printed image.

Die oben angesprochenen Fensterbereiche der zweiten Papierbahn entstehen dabei gerade durch die Entfernung der Papierfasern aus der zweiten Papierbahn. In einer vorteilhaften Erfindungsvariante werden die Papierfasern aus der zweiten Papierbahn vor dem Zusammenführen mit der ersten Papierbahn entfernt. Die Papierfasern werden dabei vorteilhaft im Passer zu der Einbettungsposition des zweiten endlosen Sicherheitselements entfernt.The above-mentioned window areas of the second paper web are created precisely by the removal of the paper fibers from the second paper web. In an advantageous variant of the invention, the paper fibers are removed from the second paper web before it is brought together with the first paper web. The paper fibers are advantageously removed in register with the embedding position of the second endless security element.

Für das erste und zweite endlose Sicherheitselement werden mit Vorteil Sicherheitselemente mit unterschiedlichem optischem Erscheinungsbild verwendet, beispielsweise jeweils ein Sicherheitselement mit Farbkippeffekt, mit einer Beugungsstruktur wie einem Hologramm, mit einem Dynamikeffekt, mit einer gegebenenfalls teilweise ausgesparten Metallisierung, oder mit einem Druckbild. Werden mehr als zwei endlose Sicherheitselemente eingebracht, weisen vorzugsweise alle eingebrachten Sicherheitselemente ein unterschiedliches optisches Erscheinungsbild auf.For the first and second endless security element, it is advantageous to use security elements with different optical appearances, for example a security element with a color shift effect, with a diffraction structure such as a hologram, with a dynamic effect, with a metallization that may be partially omitted, or with a printed image. If more than two endless security elements are introduced, all of the security elements introduced preferably have a different optical appearance.

Das zweite endlose Sicherheitselement wird mit Vorteil mit einem Versatz zu dem ersten endlosen Sicherheitselement eingebettet, der mehr als das Doppelte der Breite des breitesten eingebetteten Sicherheitselements beträgt. Auf diese Weise wird die Gesamtdicke des Sicherheitspapiers durch die Einbettung der Sicherheitselemente nicht übermäßig erhöht. Die endlosen Sicherheitselemente können auch gleichförmig über das Sicherheitselement verteilt sein, beispielsweise indem die Sicherheitselemente symmetrisch zur Mittellinie des vereinzelten Sicherheitspapiers angeordnet werden. Durch eine gleichförmige Verteilung der Sicherheitselemente kann eine besonders gleichmäßige Papierdicke und eine besonders gute Planlage des Sicherheitspapiers bzw. des daraus erzeugten Wertdokuments erreicht werden.The second endless security element is advantageously embedded with an offset to the first endless security element that is more than twice the width of the widest embedded security element. In this way, the overall thickness of the security paper is not excessively increased by embedding the security elements. The endless security elements can also be distributed uniformly over the security element, for example by arranging the security elements symmetrically to the center line of the separated security paper. Uniform distribution of the security elements makes it possible to achieve a particularly uniform paper thickness and particularly good flatness of the security paper or of the document of value produced therefrom.

In anderen Gestaltungen, insbesondere bei ohnehin dickeren Sicherheitspapieren wie sie etwa für hochwertige Eintrittskarten eingesetzt werden, können die endlosen Sicherheitselemente auch ohne Versatz übereinander angeordnet sein. Dadurch lassen sich zusätzliche visuelle Effekte im Sicherheitspapier verwirklichen, die mit einem Sicherheitselement allein nicht oder nicht ohne weiteres möglich sind. Dabei können auch drei oder mehr endlose Sicherheitselemente in das Sicherheitspapier eingebracht werden, beispielsweise indem mehrere bzw. weitere zweite Papierbahnen mit der ersten Papierbahn verbunden werden.In other configurations, especially with security papers that are thicker anyway, such as those used for high-quality admission tickets, the endless security elements can also be arranged one above the other without offset. As a result, additional visual effects can be realized in the security paper, which are not possible or not readily possible with a security element alone. In this case, three or more endless security elements can also be introduced into the security paper, for example by connecting a plurality or further second paper webs to the first paper web.

Die erste Papierbahn kann mit zumindest einem weiteren Sichermerkmal versehen werden, das vorteilhaft im Register zu den Fensterbereichen der ersten Papierbahn steht. Alternativ oder zusätzlich kann die zweite Papierbahn mit zumindest einem weiteren Sichermerkmal versehen werden, das vorteilhaft im Register zu den Fensterbereichen der zweiten Papierbahn steht. Als weitere Sicherheitsmerkmale kommen beispielsweise Wasserzeichen, Aussparungen oder aufgedruckte Elemente in Betracht.The first paper web can be provided with at least one additional security feature, which is advantageously in register with the window areas of the first paper web. Alternatively or additionally, the second paper web can be provided with at least one further security feature, which is advantageously in register with the window areas of the second paper web. For example, watermarks, cutouts or imprinted elements can be considered as further security features.

In einer vorteilhaften Weiterbildung des Verfahrens ist vorgesehen, das die Fensterbereiche der ersten und zweiten Papierbahn unterschiedlich ausgebildet werden, insbesondere unterschiedliche Formen und/oder Größen aufweisen.In an advantageous development of the method, it is provided that the window areas of the first and second paper web are designed differently, in particular have different shapes and/or sizes.

Es versteht sich, dass auch mehr als eine zweite Papierbahn auf die beschriebene Weise erzeugt und mit der ersten Papierbahn bzw. den anderen zweiten Papierbahnen verbunden werden kann. Beispielsweise kann in dem oben genannten Verfahren zusätzlich eine dritte Papierbahn in einer weiteren Papierlagenerzeugungsvorrichtung erzeugt werden, und die dritte Papierbahn mit der ersten und zweiten Papierbahn zusammengeführt und fest verbunden werden, wobei beim Zusammenführen der Papierbahnen ein drittes endloses Sicherheitselement zwischen die zweite und dritte Papierbahn eingebettet wird. Mittels einer Saug- und/ oder Spülvorrichtung können dabei aus der dritten Papierbahn in noch feuchtem Zustand Papierfasern entfernt werden, so dass das zweite und das dritte endlose Sicherheitselement in Fensterbereichen der dritten Papierbahn frei zugänglich ist.It goes without saying that more than one second paper web can also be produced in the manner described and connected to the first paper web or the other second paper webs. For example, in the above-mentioned method, a third paper web can also be produced in another paper layer generating device, and the third paper web can be brought together with the first and second paper web and firmly connected, with a third endless security element being embedded between the second and third paper web when the paper webs are brought together becomes. Paper fibers can be removed from the third paper web while it is still wet by means of a suction and/or flushing device, so that the second and third endless security elements are freely accessible in window areas of the third paper web.

Die Erfindung enthält eine Vorrichtung zum Herstellen eines Sicherheitspapiers mit zumindest zwei endlosen, auf einander gegenüberliegenden Seiten des Sicherheitspapiers sichtbaren Fenstersicherheitselementen, mit

  • einer ersten Papierlagenerzeugungsvorrichtung zum Bilden einer ersten Papierbahn und zum Einbringen eines ersten endlosen Sicherheitselements als Fenstersicherheitselement in die erste Papierbahn bei der Blattbildung,
  • einer zweiten Papierlagenerzeugungsvorrichtung zum Erzeugen einer zweiten Papierbahn,
  • einem Abnahmesieb, welches auch als Abnahmefilz oder Abnahmeband verstanden werden kann, zum Zusammenführen und festen Verbinden der zweiten Papierbahn mit der ersten Papierbahn,
  • einer Einrichtung zur Zuführung eines zweiten endlosen Sicherheitselements zwischen die erste und zweite Papierbahn beim Zusammenführen der Papierbahnen, und
  • einer Saugvorrichtung zum Entfernen von Papierfasern aus der zweiten Papierbahn in noch feuchtem Zustand.
The invention includes a device for producing a security paper with at least two endless window security elements visible on opposite sides of the security paper
  • a first paper layer generating device for forming a first paper web and for introducing a first endless security element as a window security element into the first paper web during sheet formation,
  • a second paper layer generating device for generating a second paper web,
  • a removal screen, which can also be understood as a removal felt or removal belt, for bringing together and firmly connecting the second paper web to the first paper web,
  • a device for feeding a second endless security element between the first and second paper webs when the paper webs are brought together, and
  • a suction device for removing paper fibers from the second paper web while it is still wet.

In der Erfindung weist die Saugvorrichtung ein endloses Band mit zumindest einer Aussparung auf, das auf zumindest zwei positionsverstellbare Leitwalzen gespannt ist. Die Saugvorrichtung enthält vorzugsweise weiter eine Saugwalze oder einen Saugkasten zur Erzeugung eines Unterdrucks zum Absaugen von Papierfasern durch die zumindest eine Aussparung des endlosen Bands. Die zumindest eine Aussparung des endloses Bands entspricht dabei den zu erzeugenden Fensterbereichen in der zweiten Papierbahn.In the invention, the suction device has an endless belt with at least one recess, which is stretched over at least two position-adjustable guide rollers. The suction device preferably also contains a suction roller or a suction box for generating a negative pressure for sucking off paper fibers through the at least one recess of the endless belt. The at least one recess of the endless belt corresponds to the window areas to be produced in the second paper web.

Die Spülvorrichtung weist eine Auslassvorrichtung auf. Die Auslassvorrichtung ist zur Ausgabe einer Flüssigkeit ausgebildet und zur zweiten Papierbahn gerichtet. Über die gerichtete Ausgabe der Flüssigkeit Öffnungen werden gezielt Papierfaser weggespült, so dass zumindest eine Aussparung in der zweiten Papierbahn erzeugt wird. Auf der der Auslassvorrichtung gegenüberliegender Seite der zweiten Papierbahn ist ein Aufnahmebehältnis zur Aufnahme der weggespülten Papierfasern vorgesehen. Die Auslassvorrichtung kann ausgebildet sein, die zweite Papierbahn geometrisch in Form der Aussparung zu beaufschlagen. Weiterhin kann eine Auflagefläche, welche auf der der Auslassvorrichtung gegenüberliegender Seite der zweiten Papierbahn angeordnet ist, Öffnungen aufweisen. Die Öffnungen sind entsprechend der Aussparung ausgebildet, so dass bei flächigem Beaufschlagen der zweiten Papierbahn die Aussparung erzeugt wird. Die Auflagefläche ist vorzugsweise ein Endlosband. Die Auflagefläche kann als endloses Band ausgebildet sein.The flushing device has an outlet device. The outlet device is designed to dispense a liquid and is directed towards the second paper web. Paper fibers are flushed away in a targeted manner via the directed dispensing of the liquid through openings, so that at least one recess is produced in the second paper web. On the side of the second paper web opposite the outlet device, there is a receptacle for receiving the paper fibers that have been flushed away. The outlet device can be designed to act geometrically on the second paper web in the form of the recess. Furthermore, a bearing surface, which is arranged on the side of the second paper web opposite the outlet device, can have openings. The openings are designed to correspond to the recess, so that the recess is produced when the second paper web is acted upon over a large area. The supporting surface is preferably an endless belt. The support surface can be designed as an endless belt.

Das endlose Band kann dabei aus einem siebartigen Gewebe, beispielsweise aus Kunststoff, Kupfer oder Bronze, gebildet sein, oder aus einem Material bestehen, das bis auf die zumindest eine Aussparung eine geschlossene Oberfläche zeigt.The endless band can be formed from a mesh-like fabric, for example made of plastic, copper or bronze, or can consist of a material that has a closed surface except for the at least one recess.

Anstelle eines Saugkastens kann die Saugvorrichtung auch eine Saugwalze oder einen Rohrsauger aufweisen. Zur Unterstützung der Absaugung kann auf der der Saugvorrichtung gegenüberliegenden Seite der zweiten Papierbahn zumindest ein Spritzrohr angeordnet sein, das eine Flüssigkeit auf die zweite Papierbahn sprüht um den abzusaugenden Faserstoff durch die zumindest eine Aussparung des endlosen Bands in die Saugwalze oder den Saugkasten zu befördern. Zur Reinigung des endlosen Bands kann die Saugvorrichtung weiter eine Siebkonditionierung mit Reinigungsspritzrohren und Rohrsaugern enthalten.Instead of a suction box, the suction device can also have a suction roller or a vacuum tube. To support the suction, at least one spray tube can be arranged on the side of the second paper web opposite the suction device, which sprays a liquid onto the second paper web in order to convey the fibrous material to be suctioned off through the at least one recess in the endless belt into the suction roller or the suction box. To clean the endless belt, the suction device can also contain a screen conditioning system with cleaning spray pipes and suction tubes.

Die Saug- und/ oder Spülvorrichtung ist in der Vorrichtung vorteilhaft zwischen der zweiten Papierlagenerzeugungsvorrichtung und der Zusammenführungsposition der Papierbahnen angeordnet, so dass die Papierfasern aus der zweiten Papierbahn vor dem Zusammenführen mit der ersten Papierbahn und dem Einbetten des zweiten endlosen Sicherheitselements entfernt werden können.The suction and/or flushing device is advantageously arranged in the device between the second paper layer generating device and the merging position of the paper webs, so that the paper fibers can be removed from the second paper web before merging with the first paper web and embedding the second endless security element.

Gezeigt ist auch ein mehrlagiges Sicherheitspapier oder Wertdokument mit

  • einer ersten Papierlage mit einer Grammatur von 60 g/m2 oder mehr, insbesondere von 60 g/m2 bis 80 g/m2 und einer fest mit der ersten Papierlage verbundenen zweiten Papierlage mit einer Grammatur von 45 g/m2 oder weniger, insbesondere von 10 bis 45 g/m2,
  • einem ersten endlosen Fenstersicherheitselement, das in die erste Papierlage eingebettet ist und in Fensterbereichen der ersten Papierlage frei zugänglich ist, und
  • einem zweiten endlosen Fenstersicherheitselement, das zwischen die erste und zweite Papierlage eingebettet und in Fensterbereichen der zweiten Papierlage frei zugänglich ist,
  • so dass das erste und zweite endlose Fenstersicherheitselement auf einander gegenüberliegenden Seiten des Sicherheitspapiers jeweils in den Fensterbereichen der ersten bzw. zweiten Papierlage sichtbar ist.
A multi-ply security paper or document of value is also shown
  • a first paper layer with a grammage of 60 g/m 2 or more, in particular from 60 g/m 2 to 80 g/m 2 and a second paper ply firmly connected to the first paper ply with a grammage of 45 g/m 2 or less, in particular from 10 to 45 g/m 2 ,
  • a first endless window security element embedded in the first paper ply and freely accessible in window areas of the first paper ply, and
  • a second endless window security element embedded between the first and second paper plies and freely accessible in window areas of the second paper ply,
  • so that the first and second endless window security elements are visible on opposite sides of the security paper in the window areas of the first and second paper plies, respectively.

In einer vorteilhaften Ausgestaltung ist vorgesehen, dass das erste und zweite endlose Sicherheitselement unterschiedliche optische Erscheinungsbilder aufweisen. Mit Vorteil sind das erste und zweite endlose Sicherheitselement mit einem Versatz eingebettet, der mehr als das Doppelte der Breite des breitesten eingebetteten Sicherheitselements beträgt. Alternativ können die endlosen Sicherheitselemente auch ohne Versatz übereinander angeordnet sein.In an advantageous embodiment it is provided that the first and second endless security element have different optical appearances. Advantageously, the first and second endless security element are embedded with an offset that is more than twice the width of the widest embedded security element. Alternatively, the endless security elements can also be arranged one above the other without offset.

Die erste und/oder zweite Papierlage weist zweckmäßig zumindest ein weiteres Sichermerkmal auf, das vorteilhaft im Register zu den Fensterbereichen der jeweiligen Papierbahn steht.The first and/or second layer of paper expediently has at least one further security feature which is advantageously in register with the window areas of the respective paper web.

Weitere Ausführungsbeispiele sowie Vorteile der Erfindung werden nachfolgend anhand der Figuren erläutert, bei deren Darstellung auf eine maßstabs- und proportionsgetreue Wiedergabe verzichtet wurde, um die Anschaulichkeit zu erhöhen.Further exemplary embodiments and advantages of the invention are explained below with reference to the figures, which are not shown to scale and proportions in order to improve clarity.

Es zeigen:

Fig. 1
schematisch eine Papiermaschine mit einer Rundsieb-Papiermaschine und einer zweiten Papierlagenerzeugungsvorrichtung nach einem Ausführungsbeispiel der Erfindung,
Fig. 2
die Saugvorrichtung der Papiermaschine der Fig. 1 genauer,
Fig.3
in (a) eine Aufsicht auf die Oberseite und in (b) eine Aufsicht auf die Unterseite eines erfindungsgemäßen Sicherheitspapiers in zugeschnittener Form, und
Fig. 4
einen Schnitt durch das Sicherheitspapier der Fig. 3 entlang der in Fig. 3(a) gezeigten Linie IV-IV.
Show it:
1
schematically a paper machine with a cylinder mold paper machine and a second paper layer producing device according to an embodiment of the invention,
2
the suction device of the paper machine 1 more accurate,
Fig.3
in (a) a plan view of the top and in (b) a plan view of the underside of a cut-to-size security paper according to the invention, and
4
a cut through the security paper 3 along the in 3(a) shown line IV-IV.

Die Erfindung wird nun am Beispiel der Herstellung von Sicherheitspapier für Banknoten mit zwei gegenseitigen Sicherheitsfäden erläutert. Figur 1 zeigt hierzu schematisch eine Papiermaschine 10 mit einer ersten Papierlagenerzeugungsvorrichtung, im vorliegenden Beispiel eine Rundsieb-Papiermaschine 12 und einer zweiten Papierlagenerzeugungsvorrichtung 14, vorzugsweise eine zweite Rundsiebmaschine.The invention will now be explained using the example of the production of security paper for banknotes with two opposing security threads. figure 1 shows a schematic of a paper machine 10 with a first paper layer producing device, in the present example a cylinder mold paper machine 12 and a second paper layer producing device 14, preferably a second cylinder mold machine.

In Rundsieb-Papiermaschine 12 wird in an sich bekannter Weise auf einem Rundsieb 18 eine Papierbahn 20 gebildet, wobei bei der Blattbildung ein erster endloser Sicherheitsfaden 22 als Fenstersicherheitsfaden in die Papierbahn 20 eingebettet wird. Dazu läuft der Sicherheitsfaden 22 vor dem Eintauchen in die Papiermasse 24 der Papiermaschine auf Höcker 26 des Rundsiebs 18 auf. Bei der so hergestellten ersten Papierbahn 20 liegt der Sicherheitsfaden 22 grundsätzlich in einer inneren Ebene des Papiers, wobei allerdings an den Berührungsflächen des Sicherheitsfadens 22 mit den Höckern 26 keine Papierfasern aus der Papiermasse 24 angelagert werden, so dass die Papierbahn 20 dort ausgesparte Fensterbereiche aufweist, in denen der Sicherheitsfaden 22 frei zugänglich ist. Die erste Papierbahn weist beispielsweise eine Grammatur von 60 bis 80 g/m2 auf.In a cylinder mold paper machine 12, a paper web 20 is formed in a manner known per se on a cylinder mold 18, with a first endless security thread 22 being embedded in the paper web 20 as a window security thread during sheet formation. For this purpose, the security thread 22 runs onto humps 26 of the cylinder mold 18 before it dips into the paper pulp 24 of the paper machine. In the case of the first paper web 20 produced in this way, the security thread 22 is basically in an inner plane of the paper, although no paper fibers from the paper mass 24 are deposited on the contact surfaces of the security thread 22 with the humps 26, so that the paper web 20 has recessed window areas there, in which the security thread 22 is freely accessible. The first paper web has, for example, a grammage of 60 to 80 g/m 2 .

Parallel dazu wird in der zweiten Papierlagenerzeugungsvorrichtung 14 eine zweite, zunächst homogene Papierbahn 30 hergestellt, indem Papiermasse mit einer Stoffauflaufdüse 42 auf die Oberfläche eines Rundsiebs 44 aufgedüst wird. Die mit der zweiten Papierlagenerzeugungsvorrichtung 14 erzeugte Papierlage ist sehr dünn und weist beispielsweise eine Grammatur von nur 10 bis 25 g/m2 auf. Die zweite Papierbahn 30 wird mittels eines Abnahmefilzes 16 vom Rundsieb 44 abgenommen und zur ersten Papiermaschine 12 geführt, wo sie im Bereich der Andruckrolle 36 mit der ersten Papierbahn 20 verbunden wird.In parallel with this, a second, initially homogeneous paper web 30 is produced in the second paper layer production device 14 by paper pulp being sprayed onto the surface of a cylinder mold 44 with a headbox nozzle 42 . The paper layer produced with the second paper layer producing device 14 is very thin and has, for example, a grammage of only 10 to 25 g/m 2 . The second paper web 30 is removed from the cylinder mold 44 by means of a removal felt 16 and guided to the first paper machine 12, where it is connected to the first paper web 20 in the area of the pressure roller 36.

Wie aus Fig. 1 ersichtlich, werden die beiden Papierbahnen 20, 30 so zusammenführt, dass die zweite Papierbahn 30 auf der den ausgesparten Fensterbereichen gegenüberliegenden Fläche der ersten Papierbahn 20 zu liegen kommt. Der in die erste Papierbahn 20 eingebettete Sicherheitsfaden 22 ist daher auch nach dem Zusammenführen und Verbinden der beiden Papierbahnen 20, 30 in den ausgesparten Fensterbereichen der ersten Papierbahn 20 sichtbar und frei zugänglich.How out 1 As can be seen, the two paper webs 20, 30 are brought together in such a way that the second paper web 30 comes to rest on the surface of the first paper web 20 opposite the recessed window areas. The security thread 22 embedded in the first paper web 20 is therefore visible and freely accessible in the recessed window areas of the first paper web 20 even after the two paper webs 20, 30 have been brought together and connected.

Beim Zusammenführen der Papierbahnen 20, 30 wird zudem von einer Spule 34 ein zweites endloses Sicherheitselement 32 abgespult und beim Verbinden der beiden Papierbahnen 20, 30 zwischen die erste 20 und zweite Papierbahn 30 eingebettet. Um die Dicke des Sicherheitspapiers nicht über Gebühr zu erhöhen, wird das zweite endlose Sicherheitselement 32 in der Regel nicht an der Position des ersten endlosen Sicherheitselements 22, sondern mit einem vorgegebenen Versatz Δ (siehe Fig. 3) zu dem ersten Sicherheitselement 22 eingebettet.When the paper webs 20, 30 are brought together, a second endless security element 32 is also unwound from a spool 34 and embedded between the first 20 and second paper web 30 when the two paper webs 20, 30 are connected. In order not to increase the thickness of the security paper excessively, the second endless security element 32 is generally not placed at the position of the first endless security element 22, but with a predetermined offset Δ (see Fig 3 ) to the first security element 22 embedded.

Weiter ist zwischen der zweiten Papierlagenerzeugungsvorrichtung 14 und der Andruckrolle 36 eine Saugvorrichtung 50 angeordnet, die aus der zweiten Papierbahn 30 in noch feuchtem Zustand im Passer zu der Einbettungsposition des zweiten endlosen Sicherheitselements 32 Papierfasern entfernt. Die Bereiche entfernter Papierfasern bilden Fensterbereiche in der zweiten Papierbahn 30, in denen das zweite endlose Sicherheitselement 32 nach seiner Einbettung zwischen die beiden Papierbahnen 20, 30 sichtbar und frei zugänglich ist.Furthermore, a suction device 50 is arranged between the second paper layer generating device 14 and the pressure roller 36, which removes 32 paper fibers from the second paper web 30 in the still wet state in register with the embedding position of the second endless security element. The areas of removed paper fibers form window areas in the second paper web 30, in which the second endless security element 32 is visible and freely accessible after it has been embedded between the two paper webs 20, 30.

Die miteinander verbundenen Papierbahnen 38 werden dann weiteren Bearbeitungsstationen, wie Kalander, Leimung und dergleichen zugeführt.The paper webs 38 connected to one another are then fed to further processing stations, such as calenders, sizing and the like.

Zusätzlich der Saugvorrichtung 50 kann eine Spülvorrichtung 58 zum Entfernen von Papierfasern vorgesehen sein.In addition to the suction device 50, a flushing device 58 for removing paper fibers can be provided.

Die in Fig. 2 genauer dargestellte Saugvorrichtung 50 weist ein endloses Band 52 aus einem siebartigen Gewebe auf, das durch eine Reihe von in ihrer Position verstellbaren Leitwalzen 54 mechanisch straff gespannt ist. Das endlose Band 52 weist eine oder mehrere Aussparungen auf, die in Form und Größe den zu erzeugenden Fensterbereichen in der zweiten Papierbahn 30 entsprechen. Innerhalb des endlosen Bands 52 ist ein geschlitzter Saugkasten 56 angeordnet, mit dem ein Unterdruck an dem endlosen Band 52 erzeugt und dadurch Papierfasern aus der zweiten Papierbahn durch die Aussparungen des Bands 52 und den Schlitz des Saugkastens 56 abgesaugt werden können.In the 2 The suction device 50 shown in more detail comprises an endless belt 52 of a screen-like fabric which is mechanically stretched taut by a series of guide rollers 54 which can be adjusted in position. The endless belt 52 has one or more cutouts which correspond in shape and size to the window areas to be produced in the second paper web 30 . A slotted suction box 56 is arranged inside the endless belt 52, with which a vacuum is generated on the endless belt 52 and paper fibers can thereby be sucked out of the second paper web through the gaps in the belt 52 and the slot of the suction box 56.

Anstelle eines Saugkastens 56 kann auch eine Saugwalze oder ein Rohrsauger zur Einsatz kommen. Zur Reinigung des Bands 52 kann die Saugvorrichtung 50 eine in der Figur nicht dargestellte Siebkonditionierung mit Reinigungsspritzrohren und Rohrsaugern enthalten.Instead of a suction box 56, a suction roller or a vacuum tube can also be used. In order to clean the belt 52, the suction device 50 can contain a screen conditioning system, not shown in the figure, with cleaning spray pipes and suction tubes.

Ein mehrlagiges Sicherheitspapier 60, wie es mit der Papiermaschine der Fig. 1 hergestellt werden kann, ist in den Figuren 3 und 4 in zugeschnittener Form gezeigt. Dabei zeigt Fig. 3(a) eine Aufsicht auf die Oberseite 62 und Fig. 3(b) eine Aufsicht auf die Unterseite 64 des Sicherheitspapiers 60. Dabei wird die Seite mit der aus der ersten Papierbahn 20 hervorgegangenen ersten Papierlage 70 als Oberseite, und die Seite mit der aus der zweiten Papierbahn 30 hervorgegangenen zweiten Papierlage 80 als Unterseite des Sicherheitspapiers bezeichnet. Eingebettete oder auf der jeweils gegenüberliegenden Seite des Sicherheitspapiers liegende Elemente sind zur Verdeutlichung gestrichelt eingezeichnet. Figur 4 zeigt einen Schnitt durch das Sicherheitspapier 60 entlang der in Fig. 3(a) gezeigten Linie IV-IV, die je etwa zur Hälfte im Bereich des ersten bzw. zweiten Sicherheitsfadens verläuft.A multi-ply security paper 60, as with the paper machine 1 can be produced is in the Figures 3 and 4 shown in cropped form. while showing 3(a) a plan view of the top 62 and 3(b) a top view of the underside 64 of the security paper 60. The side with the first paper ply 70 resulting from the first paper web 20 is referred to as the upper side, and the side with the second paper ply 80 resulting from the second paper web 30 is referred to as the underside of the security paper. Elements that are embedded or on the respective opposite side of the security paper are drawn in with dashed lines for clarification. figure 4 shows a section through the security paper 60 along the 3(a) shown line IV-IV, which runs approximately half in the area of the first and second security thread.

Das Sicherheitspapier 60 enthält eine erste, dickere Papierlage 70, mit einer Grammatur von 60 bis 80 g/m2, in deren Inneren ein erster Fenstersicherheitsfaden 72 eingebettet ist. Die erste Papierlage weist Fensterbereiche 74 auf, in denen der erste Sicherheitsfaden 72 von der Oberseite 62 des Sicherheitspapiers 60 aus sichtbar und frei zugänglich ist. Die erste Papierlage 70 ist fest mit einer zweiten, dünneren Papierlage 80 verbunden, die nur eine Grammatur von 10 bis 45 g/m2 aufweist. Zwischen die erste und zweite Papierlage 70, 80 ist ein zweiter Fenstersicherheitsfaden 82 eingebettet. Die zweite Papierlage 80 weist Fensterbereiche 84 auf, in denen der zweite Sicherheitsfaden 82 von der Unterseite 64 des Sicherheitspapiers 60 aus sichtbar und frei zugänglich ist. Die Sicherheitsfäden 72 und 82 sind von der jeweils gegenüberliegenden Seite 64 bzw. 62 des Sicherheitspapiers nicht zugänglich und jedenfalls im Auflicht auch nicht sichtbar.The security paper 60 contains a first, thicker paper layer 70 with a grammage of 60 to 80 g/m 2 , inside which a first window security thread 72 is embedded. The first paper ply has window areas 74 in which the first security thread 72 is visible from the top 62 of the security paper 60 and is freely accessible. The first paper ply 70 is firmly connected to a second, thinner paper ply 80, which only has a grammage of 10 to 45 g/m 2 . A second window security thread 82 is embedded between the first and second paper layers 70 , 80 . The second paper ply 80 has window areas 84 in which the second security thread 82 is visible and freely accessible from the underside 64 of the security paper 60 . The security threads 72 and 82 are not accessible from the respectively opposite side 64 or 62 of the security paper and are also not visible in incident light.

Der visuelle Eindruck der Sicherheitsfäden im Durchlicht kann nach Wunsch gewählt werden. In einer vorteilhaften Ausgestaltung tragen die Sicherheitsfäden beispielsweise jeweils eine metallische Beschichtung, in die kleine, musterförmige Aussparungen, etwa in Form einer Mikroschrift, eingebracht sind. Sind diese Sicherheitsfäden in zumindest teilweise durchscheinendes Sicherheitspapier eingebettet, so treten sie im Durchlicht als dunkle Streifen mit hellen Aussparungen in Erscheinung. Soll ein Sicherheitsfaden im Durchlicht nicht sichtbar sein, kann die gegenüberliegende Oberfläche des Sicherheitspapiers mit einer opaken Beschichtung versehen sein.The visual impression of the security threads in transmitted light can be chosen as desired. In an advantageous embodiment, the security threads each have a metallic coating, for example, into which small, pattern-shaped recesses, for example in the form of microwriting, are introduced. If these security threads are embedded in security paper that is at least partially translucent, they appear in transmitted light as dark stripes with light gaps. If a security thread is not to be visible in transmitted light, the opposite surface of the security paper can be provided with an opaque coating.

Die beiden Sicherheitsfäden 72, 82 zeigen vorteilhaft ein unterschiedliches optisches Erscheinungsbild, beispielsweise der Sicherheitsfaden 72 einen Farbkippeffekt und der Sicherheitsfaden 82 einen Dynamikeffekt.The two security threads 72, 82 advantageously have a different visual appearance, for example the security thread 72 has a color shift effect and the security thread 82 has a dynamic effect.

Im Sicherheitspapier 60 sind die beiden Sicherheitsfäden 72, 82 vorteilhaft um einen Versatz Δ (in Fig. 3(b) gezeigt) voneinander getrennt, der mehr als das Doppelte der Breite des breitesten der eingebetteten Sicherheitsfäden beträgt. Während Fig. 3 eine asymmetrische Verteilung der Sicherheitsfäden 72, 82 zeigt, können die Sicherheitsfäden auch symmetrisch zur Mittellinie des Sicherheitspapiers 60 angeordnet sein, so dass beim Wenden des Sicherheitspapier jeweils ein Sicherheitsfaden an derselben Stelle des Sicherheitspapier sichtbar ist.In the security paper 60, the two security threads 72, 82 are advantageously offset by an offset Δ (in 3(b) shown) separated from each other that is more than twice the width of the widest of the embedded security threads. While 3 shows an asymmetrical distribution of the security threads 72, 82, the security threads can also be arranged symmetrically to the center line of the security paper 60, so that when the security paper is turned over, a security thread is visible at the same point on the security paper.

Wie in Figur 3 angedeutet, können die Fensterbereiche 74, 84 auf der Vorder- und Rückseite 62, 64 des Sicherheitspapiers unterschiedliche Formen und Größen aufweisen.As in figure 3 indicated, the window areas 74, 84 on the front and back 62, 64 of the security paper can have different shapes and sizes.

Die erste Papierlage 70 kann mit zumindest einem weiteren, dem Fenstersicherheitsfaden 72 zugeordneten Sicherheitsmerkmal 76 versehen sein, das vorzugsweise im Register zu den Fensterbereichen 74 der ersten Papierbahn steht. In gleicher Weise kann die zweite Papierlage 80 mit zumindest einem weiteren, dem Fenstersicherheitsfaden 82 zugeordneten Sicherheitsmerkmal 86 versehen sein, das vorzugsweise im Register zu den Fensterbereichen 84 der zweiten Papierbahn steht. Bei den zugeordneten Sicherheitsmerkmalen 76, 86 kann es sich beispielsweise um Wasserzeichen, Aussparungen der ersten bzw. zweiten Papierlage oder um aufgedruckte Elemente handeln.The first paper ply 70 can be provided with at least one additional security feature 76 associated with the window security thread 72, which is preferably in register with the window areas 74 of the first paper web. In the same way, the second paper ply 80 can be provided with at least one further security feature 86 assigned to the window security thread 82, which is preferably in register with the window areas 84 of the second paper web. The associated security features 76, 86 can be, for example, watermarks, gaps in the first or second paper layer, or printed elements.

BezugszeichenlisteReference List

1010
Papiermaschinepaper machine
1212
Rundsieb-PapiermaschineCylinder mold paper machine
1414
zweite Papierlagenerzeugungsvorrichtungsecond paper layer forming device
1616
Abnahmefilzpickup felt
1818
Rundsiebcylinder sieve
2020
erste Papierbahnfirst paper web
2222
erster endloser Sicherheitsfadenfirst endless security thread
2424
Papiermassepaper pulp
2626
Höckerhump
3030
zweite Papierbahnsecond paper web
3232
zweites endloses Sicherheitselementsecond endless security element
3434
SpuleKitchen sink
3636
Andruckrollepinch roller
3838
miteinander verbundene Papierbahneninterconnected paper webs
4242
Stoffauflaufdüseheadbox nozzle
4444
Rundsiebcylinder sieve
5050
Saugvorrichtungsuction device
5252
endloses Bandendless tape
5454
Leitwalzenguide rollers
5656
Saugkastensuction box
5858
Spülvorrichtungflushing device
6060
Sicherheitspapiersecurity paper
6262
Oberseitetop
6464
Unterseitebottom
7070
erste Papierlagefirst layer of paper
7272
erster Fenstersicherheitsfadenfirst window security thread
7474
Fensterbereichepanes
7676
weiteres Sicherheitsmerkmalanother security feature
8080
zweite Papierlagesecond layer of paper
8282
zweiter Fenstersicherheitsfadensecond window security thread
8484
Fensterbereichepanes
8686
weiteres Sicherheitsmerkmalanother security feature

Claims (3)

  1. Apparatus (10) for producing a security paper (60) having at least two endless window security elements which are visible on opposite sides of the security paper (60), the device having:
    - a first paper layer creation apparatus (12) for forming a first paper web (20) and for introducing a first endless security element (22, 72) in the form of a window security element into the first paper web (20) when the sheet is being formed,
    - a second paper layer creation apparatus (14) for creating a second paper web (30),
    - a take-off mesh for converging and fixedly connecting the second paper web (30) with the first paper web (20),
    - a device for feeding a second endless security element (32, 82), which differs from the first endless security element (22, 72) in terms of visual appearance, between the first and the second paper web (20, 30) when the paper webs (20, 30) are converging, and
    - a suction apparatus (50, 58) for removing paper fibres from the second paper web (30) in the still-wet state, wherein
    the suction apparatus (50) is disposed between the second paper layer creation apparatus (14) and the position of convergence of the paper webs (20, 30), and the suction apparatus (50) comprises an endless belt (52) which has at least one cutout and is tensioned on at least two positionally adjustable guide rollers (54).
  2. Apparatus according to Claim 1, characterized in that the suction apparatus (50) also comprises a suction roller or a suction box (56) for generating a negative pressure to extract paper fibres by suction and/or a flushing unit for flushing out paper fibres through the at least one cutout in the endless belt (52).
  3. Apparatus according to Claim 1 or 2, characterized in that a flushing device (58) is disposed between the second paper layer creation apparatus (14) and the position of convergence of the paper webs (20, 30).
EP17702520.2A 2016-02-02 2017-01-26 Method and device for producing a security paper having two window security elements Active EP3411525B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016001107.6A DE102016001107A1 (en) 2016-02-02 2016-02-02 Method and device for producing a security paper with two window security elements
PCT/EP2017/000095 WO2017133832A1 (en) 2016-02-02 2017-01-26 Method and device for producing a security paper having two window security elements

Publications (3)

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EP3411525A1 EP3411525A1 (en) 2018-12-12
EP3411525B1 EP3411525B1 (en) 2019-12-04
EP3411525B2 true EP3411525B2 (en) 2023-08-16

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EP (1) EP3411525B2 (en)
DE (1) DE102016001107A1 (en)
ES (1) ES2764171T5 (en)
RU (1) RU2712313C1 (en)
WO (1) WO2017133832A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017009357A1 (en) * 2017-10-09 2019-04-11 Giesecke+Devrient Currency Technology Gmbh Manufacturing apparatus and manufacturing method for security paper

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WO2014086476A1 (en) † 2012-12-07 2014-06-12 Giesecke & Devrient Gmbh Device for producing a multiple-layer security paper with cut-outs
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RU2344219C1 (en) * 2007-07-18 2009-01-20 Федеральное Государственное Унитарное Предприятие "Гознак" (Фгуп "Гознак") Method for manufacturing fraud-proof paper (versions) and fraud-proof paper (versions)
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EP0059056B1 (en) † 1981-02-19 1985-05-02 Portals Limited Method for making a fibrous sheet
WO2005069231A1 (en) † 2004-01-16 2005-07-28 De La Rue International Limited Security substrate incorporating elongate security elements
DE102005045566A1 (en) † 2005-03-23 2006-09-28 Giesecke & Devrient Gmbh Multi-layer security paper
US20090001709A1 (en) † 2005-03-23 2009-01-01 Giesecke & Devrient Gmbh Multi-Ply Security Paper
FR2891761A1 (en) † 2005-10-06 2007-04-13 Arjowiggins Security Soc Par A METHOD FOR MANUFACTURING SHEET MATERIAL COMPRISING AT LEAST ONE WINDOW.
EP2176462B1 (en) † 2007-07-11 2011-09-14 Arjowiggins Security Process for manufacturing a sheet material
WO2014086476A1 (en) † 2012-12-07 2014-06-12 Giesecke & Devrient Gmbh Device for producing a multiple-layer security paper with cut-outs
CN104420399A (en) † 2013-09-04 2015-03-18 昆山钞票纸业有限公司 Novel security paper and manufacturing method thereof

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ES2764171T5 (en) 2024-02-14
WO2017133832A1 (en) 2017-08-10
DE102016001107A1 (en) 2017-08-03
EP3411525A1 (en) 2018-12-12
RU2712313C1 (en) 2020-01-28
ES2764171T3 (en) 2020-06-02
EP3411525B1 (en) 2019-12-04

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