EP1253241A2 - Procédé et dispositif pour insérer des éléments de sécurité dans une bande de papier - Google Patents

Procédé et dispositif pour insérer des éléments de sécurité dans une bande de papier Download PDF

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Publication number
EP1253241A2
EP1253241A2 EP02007221A EP02007221A EP1253241A2 EP 1253241 A2 EP1253241 A2 EP 1253241A2 EP 02007221 A EP02007221 A EP 02007221A EP 02007221 A EP02007221 A EP 02007221A EP 1253241 A2 EP1253241 A2 EP 1253241A2
Authority
EP
European Patent Office
Prior art keywords
paper web
pressure
volume
feature
suspension
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
EP02007221A
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German (de)
English (en)
Other versions
EP1253241B1 (fr
EP1253241A3 (fr
Inventor
Thomas Dr. Attenberger
Ralf Soltau
Gerhard Dr. Stenzel
Manfred Hutmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Giesecke and Devrient GmbH
Original Assignee
Giesecke and Devrient GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Giesecke and Devrient GmbH filed Critical Giesecke and Devrient GmbH
Publication of EP1253241A2 publication Critical patent/EP1253241A2/fr
Publication of EP1253241A3 publication Critical patent/EP1253241A3/fr
Application granted granted Critical
Publication of EP1253241B1 publication Critical patent/EP1253241B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/24—Addition to the formed paper during paper manufacture
    • D21H23/26—Addition to the formed paper during paper manufacture by selecting point of addition or moisture content of the paper
    • D21H23/28—Addition before the dryer section, e.g. at the wet end or press section
    • 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
    • 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
    • D21H21/44—Latent security elements, i.e. detectable or becoming apparent only by use of special verification or tampering devices or methods
    • D21H21/48—Elements suited for physical verification, e.g. by irradiation
    • 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
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/50—Spraying or projecting
    • 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
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/78—Controlling or regulating not limited to any particular process or apparatus

Definitions

  • the invention relates to a method and an apparatus for introduction of feature substances in a paper web as well as in a paper machine such a device.
  • feature substances as security features in paper documents of value, in particular to introduce banknotes, for example luminescent Particles that are exposed to suitable excitation radiation, such as UV light, fluoresce in a characteristic color.
  • suitable excitation radiation such as UV light
  • characteristic substances substances with certain physical properties understood, their presence and / or arrangement due these properties metrologically, for example by means of suitable sensors is verifiable.
  • Such features are mostly used as signs, patterns or lines placed at defined positions on the paper.
  • UK-A-696 673 proposes to include color pigments in one Water not mixing the suspension liquid already during the To inject leaf formation into the center of the leaf using syringes Dot lines or continuous lines, for example made in UV light to produce fluorescent material. But since the fluorescent In any case, suspension in the paper material that has not yet been completed the contours are partially and not controllable Lines are out of focus and the pigment concentration is across the line width uneven.
  • DE-PS-497 037 proposes a suspension with fluorescent Substances on the finished, still moist paper web like this to apply, for example, to spray on the paper structure itself undergoes no significant change. But spraying also leads to Patterns whose sharpness of contours is difficult to control and whose Feature concentration over the area of the pattern is not constant.
  • EP-A-0 659 935 proposes the feature substances to disperse not in a suspension but in a gas, so that Agglomerates of feature particles easily disintegrate and in defined, homogeneous concentration in the gas, then by means of a nozzle to be sprayed on the still wet paper web. So that even at low Feature concentrations still a homogeneous distribution in paper achievable with relatively sharp contours at the same time.
  • a disadvantage of this aerosol application of the particles is that only a few Characteristic substances are suitable for application in aerosol form, since the Slightly clog pipes and nozzles. This applies in particular to fine-grained ones Feature substances that tend to agglomerate. Also revealed Test results of relatively high concentration fluctuations, so that a high concentration of features is necessary in order to be reliably measurable Get characteristics.
  • the object of the present invention is therefore a method and a Propose device and a corresponding paper machine with which it is possible to sharpen feature substances in patterns or traces Contours and as evenly as possible over the sample area, too low concentrations in paper, without this for visible changes in the fiber structure of the paper arise to the eye.
  • the feature substance suspension as a laminar jet with low Jet pressure directed to the surface of the paper web.
  • the characteristic substance suspension flows onto the paper web with little pressure.
  • the fiber structure is prevented of the paper fleece when applying the characteristic substance suspension changed. Accordingly, the place where the feature substance suspension is applied to the finished paper for the naked eye not visible, not even in transmitted light. Therefore, the procedure can also used to introduce feature substances in the watermark area become.
  • the width of the traces of the feature can be determined empirically and at constant amount of suspension almost constant.
  • the generated thereby Patterns therefore have sharp contours. Because the on the paper web guided suspension jet the wet and still soft paper layer evenly penetrated is the amount of suspension applied over the surface roughly constant. This causes the concentration of features to be higher than The width of the generated pattern is almost homogeneous, regardless of how high the concentration of features in the suspension is. This is it is possible to make patterns with even the smallest, homogeneous across the sample area to produce distributed feature concentrations.
  • the feature concentration the pattern generated can be so small that the features with no longer visible to the naked eye, but only mechanically suitable sensors are detectable.
  • the feature substances are introduced on a liquid basis, Almost any kind of feature substances can be used in one suitable suspension medium are dispersible or soluble. Self In this way, high-density pigments can evenly penetrate the paper web be introduced.
  • the introduction of the feature substances by means of Full blasting has the further advantage over spraying methods that none Spray occurs. As a result, the equipment used does not become dirty so light and there are fewer problems with particle deposition on the nozzles.
  • the feature substances are preferably dispersed in water, since water always available, inexpensive, harmless and chemically neutral. This excludes the use of other liquids, such as alcohol, not from.
  • Luminescent substances are particularly suitable as feature substances Pigments that only under special excitation conditions such as are recognizable under UV light, so that the inserted into the paper Feature patterns are not readily visible in daylight. But also magnetic or absorbing in certain wavelength ranges Feature substances are with the inventive method or the device processable.
  • the laminar feature substance suspension jet is preferably immediate after sheet formation and removal of the still soft paper web from Paper forming sieve passed on the paper web, since the paper web on this Place solidified sufficiently, but is still so moist that the suspension with the feature substances can penetrate the paper web without leaving any traces leave.
  • a special embodiment provides that one in Paper web transport direction downstream of the paper machine Suction device in the form of a separate suction box is provided to aspirate the suspension medium through the paper web. Thereby is supported that the feature substances not only in areas of the paper near the surface, but over the entire area Paper thickness is distributed.
  • the volume should have a certain size because it serves as Buffer volume, the fluctuations in the concentration of the feature substance compensated in volume by the addition of additional feature substance concentrate and suspension medium in the volume become. On the other hand, this volume must not be too large, either otherwise changes to be made to the target value of the feature substance concentration take too long. It has proven itself to be the size of the volume to choose that an exchange or the throughput of the volume over the Nozzles about 15 min. lasts.
  • connection line inlet pressure depends on how high is the maximum suspension pressure in the closed circuit, and on the other hand how much pressure loss in the circuit to the branch the connecting line in question is.
  • This pressure loss depends but again directly depends on the speed at which the Characteristic substance suspension is promoted in the cycle.
  • a control device is preferably provided in order to determine the maximum or to keep the absolute suspension pressure constant in the circuit.
  • To the absolute pressure in the volume is measured at a suitable point and the volume of the suspension medium supplied to the volume via a feed pump controlled. Although the volume is continuous through the nozzles Characteristic suspension is removed, the essential remain Parameters in volume and therefore constant at the nozzles.
  • the pumped one can or circulated volume are monitored and kept constant.
  • suspension portions are extracted from the volume compensated and provided for constant conditions.
  • the pressure control has however, the advantage of being independent of the number of open nozzles ensures that, with the same nozzles, the same amount of suspension from each nozzle exit. This is particularly advantageous if the paper web production is running a quick change in with the suspension jets Paper generated coding should be done.
  • the Feature substance suspension in the desired concentration essentially is only generated in the volume from which the connecting lines branch off to the jet outlet nozzles, in the case of the specific preferred ones Embodiment therefore only in the closed circulatory system.
  • the circulation therefore becomes a feature substance concentrate and the suspension medium fed separately, preferably locally in front of the pump, with which the feature substance suspension is circulated in the closed circuit will, so this circulation pump has the function of mixing of the feature substance concentrate with the suspension medium.
  • the suspension medium before it is added to the volume.
  • This ensures, among other things, that the suspension, in particular with Pressure drop does not outgas and forms bubbles. Can in the degassed medium there are already existing air bubbles in the feature substance suspension dissolve again. Would such air bubbles with the characteristic substance suspension discharged from the nozzles, this would have a negative impact on the contour and concentration distribution of the feature substance on it Place in the finished paper.
  • the connecting lines are for similar reasons preferably connected to the volume from above and protrude into the volume into it, so that any air bubbles contained in the volume cannot get into the connecting lines and beyond also no feature substances sedimented in volume in the connecting lines get there and block them. Because especially with feature substances with particularly high density there is a risk that some larger particles are deposited at the bottom of the volume.
  • the suspension is between the removal points shut-off devices provided by the buffer volume and the nozzles, which enable each nozzle to be switched on and off individually.
  • the shut-off devices can, for example, shut-off valves or be valves that are manually or automatically controlled and manually, electrically or operated pneumatically. It can be used in a paper web an individual or regularly repeating pattern of features are generated, which can also consist of broken tracks and which also allows coded information to be reproduced. Especially with automatically controlled switching devices Characteristic patterns are generated, their application in the Paper web with marks on it is synchronized. In a preferred embodiment, these marks are made in paper existing watermarks formed.
  • the invention is illustrated below by way of example using a schematic drawing explains the device according to the invention in a paper machine shows.
  • the A suction device is arranged downstream of nozzles 11 in the paper web transport direction 3, which is provided under the paper web 2 to the means of the Nozzles 11 applied to the paper web 2 through the feature substance suspension to suck the paper web 2 through, so that only the feature substances remain in the paper.
  • the paper web 2 is then optionally Processing stations, not shown, for drying, coating, printing and the like.
  • the device for introducing the feature substances into the paper web sets essentially consist of four subsystems.
  • Core component of the The device is the closed circuit designed as a pipeline system 13 of the nozzle cross member 10, which as a circulating pump is a centrifugal pump 14 for the continuous promotion of the suspension of characteristic substances in the Pipe system owns.
  • the second subsystem is through water treatment and feed 20 and the third subsystem through the feature substance concentrate preparation and feed 30 formed.
  • the fourth Subsystem form the nozzles 11 and their connecting lines 15 to the closed Circuit 13 of the nozzle traverse 10. The individual subsystems are described in detail below.
  • the feature substances are stored as feature substance concentrate in a storage container kept available. Through a lid opening 32 Container 31 feature substances supplied in powdered form. The feeder of water takes place via a lockable supply line 33. Water and feature substances are mixed using an agitator 34, and the feature substance concentration is preferably in the range from 10 to 30% by weight, especially with 0.4 kg of feature substance on 11 water.
  • the exact concentration value in the reservoir is relatively uncritical since the final one Concentration of the feature substance suspension directed from the nozzles 11 onto the paper web 2 only in the closed circuit 13 by admixing set by water. The higher the concentration in the storage container is, the larger the feature set and thus the time period until Refill the storage container.
  • the fill level of the storage container will monitored with a level meter 35.
  • a predetermined viscosity limit of the feature concentrate may be used not exceed, otherwise the promotion of the feature concentrate by means of the preferably designed as a diaphragm pump Metering pump 36 is affected.
  • concentration values given above is the characteristic substance suspension for most characteristic substances still very thin, almost water-like.
  • the closed circuit 13 is also treated water fed via a feed line 28.
  • the water is previously in one, for example 20 l vacuum container 21 at a negative pressure of degassed about 0.3 bar compared to the ambient pressure, so that any Air bubbles, for example with the feature concentrate in the closed circuit 13 get in the feature substance suspension of can resolve closed circuit 13.
  • the vacuum container is with a vacuum pump 27 and a level meter 25 equipped ensures that the level for safety reasons to about 90% of the Capacity is maintained.
  • An example designed as a gear pump 26 The feed pump conveys the treated water from the vacuum container 21 via the feed line 28 to the closed circuit 13.
  • the maximum delivery rate of the gear pump 26 is approximately, for example 550 l per hour, which is sufficient to use about 300 nozzles at the same time a throughput of approx. 1.7 l per hour per nozzle.
  • an additional water decalcifying device integrated, but not shown in the figure is.
  • the closed circuit 13 is essentially formed by a closed one Pipe system with integrated centrifugal pump 14 for circulation the feature substance suspension promoted in the closed circuit 13.
  • the closed circuit 13 is the feature substance concentrate as well the treated water via the supply lines 38, 28 shortly before Centrifugal pump 14 supplied.
  • the centrifugal pump 14 thus takes over Function of the mixing of the feature substance concentrate supplied with the supplied, treated water. This ensures that the concentration distribution of the feature substances in the feature substance suspension is largely homogeneous before feature substance suspension proportions via the connecting lines 15 to the nozzles 11 from the Circuit 13 are branched off.
  • a sieve 16 with a 100 ⁇ m sieve insert Stainless steel is provided just behind the centrifugal pump and holds particles back, which could lead to a blockage of the nozzles 11.
  • a shut-off valve 17 for venting the device provided after switching on.
  • the closed circuit 13 has two control loops, namely a pressure control loop and a density control loop.
  • the pressure control circuit comprises two pressure sensors P 1 and P 2 at different points in the closed circuit 13, namely preferably on the one hand at a point in front of the branches of the connecting lines 15 to the nozzles 11 and on the other hand at a point downstream in the circuit flow direction.
  • the pressure p 1 can be, for example, between 500 and 800 mbar depending on the line lengths and cross sections. Deviations from this target value are measured and used to regulate the gear pump 26 for conveying the treated water in such a way that the target value p 1 is maintained.
  • the pressure value p2 is preferably measured behind the branch of the last connecting line 15 to the last nozzle 11 in order to determine the pressure drop which arises on account of the branched-off feature substance suspension fractions and the flow resistance of the lines in the closed circuit 13.
  • This pressure drop should always be constant in order to ensure that the same pressure conditions prevail at all nozzles 11, regardless of the number of activated nozzles. Since the pressure difference p 2 - p 1 is directly dependent on the flow rate of the feature substance suspension in the closed circuit 13, the differential pressure measured value p 2 - p 1 is used to monitor the delivery rate of the centrifugal pump 14.
  • the density control loop includes a density sensor ⁇ .
  • the inlet of the density sensor ⁇ is directly behind the screen 16 directly on the closed Circuit 13 connected.
  • the drain of the density sensor ⁇ is on the opposite side just before the inlet of the centrifugal pump 14.
  • the pressure drop between the inlet and outlet ensures sufficient Flow through the density sensor ⁇ , which prevents deposits in the density sensor ⁇ .
  • the current density of the characteristic substance suspension in the closed circuit 13 determined. It is a measure of the concentration of feature substances in the characteristic substance suspension of the closed circuit 13.
  • the information provided by the density sensor ⁇ about the current density of the The dosing pump 36 on the reservoir 31 becomes feature substance suspension regulated in order to set a predetermined nominal value of the suspension density, which corresponds to a concentration of a characteristic substance.
  • a typical one Density setting for the dosing of feature substances in the feature substance suspension is about 0.1 to 0.5 wt .-%.
  • each branch of a connecting line 15 not only has the same feature substance concentration in the feature substance suspension, but also a pressure that is constant over time, even if from connecting line to connecting line different connecting line inlet pressure.
  • the same connecting line outlet pressure can be set for all lines by a simple constructive design of the connecting lines, by a defined pressure loss being generated in each connecting line 15 by suitable choice of the diameter and / or preferably the length of the connecting lines 15, so that at the end of the connecting lines, that is, the same pressure is present at the nozzles 11.
  • connecting lines 15 with a length of typically a few decimeters have proven suitable.
  • the connecting lines consist, for example, of hoses with an inner diameter of approximately 1 mm.
  • Each connecting line 15 has an individual shut-off valve 12. Die Shutting off individual shut-off valves 12 has on the throughput and nozzle outlet pressure have no effect since the trunk inlet pressure independently by means of the pressure control described above is kept approximately constant by the number of active nozzles.
  • the shut-off valves 12 can also be replaced by shut-off valves. Especially when the generated coding pattern changes frequently or quickly is an electrical or pneumatic (not shown in the figure) Control of the shut-off devices advantageous. All in all can also have several hundred nozzles at a distance of approx. 3 to 15 mm staggered.
  • the connecting lines 15 from above to the closed circuit 13 are connected to prevent larger feature substance particles that are at the bottom of the closed cycle 13 have been sucked in, leading to constipation of the Components such as stopcocks, nozzles, etc. could result. Protrude beyond the connecting lines 15 from above about 10 mm in the closed Circuit 13 in order to prevent any air bubbles with the Characteristic substance suspension are discharged through the nozzles 11, which is would adversely affect the quality of the stripe pattern generated.
  • the above-described device for introducing feature substances into a paper web enables a wide variety of line codes by activating and deactivating individual nozzles 11 by means of the respectively associated shut-off valves 12, without this having an effect on the feature substance concentration of the individual lines ultimately present in the finished paper.
  • This is essentially due to the special pressure control circuit, in which the absolute pressure in the volume, for example the pressure p 1 in the closed circuit 13 before branching of the connecting lines 15 and the pressure p 2 after branching of the connecting lines 15, is measured and by controlling the delivery rate of the Gear pump 26 are each kept at a constant value.

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  • Paper (AREA)
EP02007221A 2001-04-27 2002-03-27 Procédé et dispositif pour insérer des éléments de sécurité dans une bande de papier Expired - Lifetime EP1253241B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10120818A DE10120818A1 (de) 2001-04-27 2001-04-27 Verfahren und Vorrichtung zum Einbringen von Merkmalsstoffen in eine Papierbahn
DE10120818 2001-04-27

Publications (3)

Publication Number Publication Date
EP1253241A2 true EP1253241A2 (fr) 2002-10-30
EP1253241A3 EP1253241A3 (fr) 2004-02-04
EP1253241B1 EP1253241B1 (fr) 2011-07-27

Family

ID=7683029

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02007221A Expired - Lifetime EP1253241B1 (fr) 2001-04-27 2002-03-27 Procédé et dispositif pour insérer des éléments de sécurité dans une bande de papier

Country Status (5)

Country Link
US (2) US6936138B2 (fr)
EP (1) EP1253241B1 (fr)
AT (1) ATE518032T1 (fr)
DE (1) DE10120818A1 (fr)
ES (1) ES2369753T3 (fr)

Cited By (9)

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WO2005035261A1 (fr) 2003-10-08 2005-04-21 Giesecke & Devrient Gmbh Document de valeur comprenant differentes substances caracteristiques
FR2901286A1 (fr) * 2006-05-19 2007-11-23 Arjowiggins Soc Par Actions Si Procede de fabrication d'un materiau en feuille comprenant au moins une couche fibreuse et des elements de securite et/ou decoratifs
US8100334B2 (en) 2006-08-08 2012-01-24 Arjowiggins Security member having a relatively small format and comprising a through-hole and sheet comprising the same
DE102010043285A1 (de) 2010-11-03 2012-05-03 Aktiebolaget Skf Verfahren, Strahlmittel und Vorrichtung zum Behandeln eines Bauelements
US8262134B2 (en) 2003-10-08 2012-09-11 Giesecke & Devrient Gmbh Value document
US8376409B2 (en) 2006-10-12 2013-02-19 Arjowiggins Security Security sheet comprising a fibrous substrate
GB2505148A (en) * 2011-04-07 2014-02-26 Virdia Ltd Lignocellulose conversion processes and products
WO2014033658A1 (fr) 2012-09-03 2014-03-06 Arjowiggins Security Procédé d'authentification a partir de la teneur en matière bio-sourcée
US9410216B2 (en) 2010-06-26 2016-08-09 Virdia, Inc. Sugar mixtures and methods for production and use thereof

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DE10120818A1 (de) * 2001-04-27 2002-10-31 Giesecke & Devrient Gmbh Verfahren und Vorrichtung zum Einbringen von Merkmalsstoffen in eine Papierbahn
DE10346631A1 (de) 2003-10-08 2005-05-19 Giesecke & Devrient Gmbh Wertdokument
DE10346634A1 (de) 2003-10-08 2005-05-12 Giesecke & Devrient Gmbh Wertdokument
DE10346687A1 (de) 2003-10-08 2005-05-04 Giesecke & Devrient Gmbh Codierungssystem für Wertdokumente
DE10346685A1 (de) 2003-10-08 2005-05-04 Giesecke & Devrient Gmbh Codiersystem für Wertdokumente
DE10352807A1 (de) * 2003-11-12 2005-06-23 Voith Paper Patent Gmbh Auftragsvorrichtung
ITVR20040104A1 (it) * 2004-06-16 2004-09-16 Cartiere Fedrigoni & C Spa Apparecchiatura per la produzione di carta di sicurezza e relativo procedimento
FI117059B (fi) * 2004-09-21 2006-05-31 Metso Paper Inc Menetelmä ja sovitelma epäpuhtauksien erottelemiseksi päällystysaseman konekierrosta
US7622022B2 (en) 2006-06-01 2009-11-24 Benny J Skaggs Surface treatment of substrate or paper/paperboard products using optical brightening agent
DE102008012221B4 (de) * 2008-03-03 2011-06-01 Kronotec Ag Verfahren zum Streichen eines noch feuchten lagenförmigen Substrats
FR2937058B1 (fr) * 2008-10-10 2012-01-06 Arjowiggins Procede de fabrication d'un document de securite.
WO2013112511A2 (fr) 2012-01-23 2013-08-01 International Paper Company Traitement distinct d'un substrat de papier avec des sels métalliques multivalents et des azurants optiques

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US9963673B2 (en) 2010-06-26 2018-05-08 Virdia, Inc. Sugar mixtures and methods for production and use thereof
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US10876178B2 (en) 2011-04-07 2020-12-29 Virdia, Inc. Lignocellulosic conversion processes and products
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EP1253241B1 (fr) 2011-07-27
ATE518032T1 (de) 2011-08-15
US20050230071A1 (en) 2005-10-20
ES2369753T3 (es) 2011-12-05
EP1253241A3 (fr) 2004-02-04
US6936138B2 (en) 2005-08-30
DE10120818A1 (de) 2002-10-31
US20020166647A1 (en) 2002-11-14
US7175739B2 (en) 2007-02-13

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