EP0839950B1 - Process to introduce substances in a moving fiber web - Google Patents
Process to introduce substances in a moving fiber web Download PDFInfo
- Publication number
- EP0839950B1 EP0839950B1 EP97118504A EP97118504A EP0839950B1 EP 0839950 B1 EP0839950 B1 EP 0839950B1 EP 97118504 A EP97118504 A EP 97118504A EP 97118504 A EP97118504 A EP 97118504A EP 0839950 B1 EP0839950 B1 EP 0839950B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- substances
- process according
- paper
- web
- headbox
- 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.)
- Expired - Lifetime
Links
- 239000000126 substance Substances 0.000 title claims abstract description 26
- 239000000835 fiber Substances 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims description 18
- 239000007787 solid Substances 0.000 claims abstract description 3
- 239000007788 liquid Substances 0.000 claims abstract 4
- 239000000843 powder Substances 0.000 claims abstract 2
- 239000000725 suspension Substances 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 4
- 239000003085 diluting agent Substances 0.000 claims 2
- 238000009826 distribution Methods 0.000 description 4
- 238000007792 addition Methods 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 229920001131 Pulp (paper) Polymers 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 230000009969 flowable effect Effects 0.000 description 2
- 230000000977 initiatory effect Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
Images
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
- 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
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F1/00—Wet end of machines for making continuous webs of paper
- D21F1/44—Watermarking devices
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- 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
- D21H21/28—Colorants ; Pigments or opacifying agents
-
- 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
- D21H21/28—Colorants ; Pigments or opacifying agents
- D21H21/285—Colorants ; Pigments or opacifying agents insoluble
Definitions
- the invention relates to a method in which substances in or before Headbox of a paper machine introduced into a fiber suspension from which a running fibrous web is formed, the Introduction to several, distributed across the width of the headbox Places.
- the strips are spaced apart seen in the direction of the web width.
- the insertion is also carried out here the strip is continuous so that the strip is not in the finished paper web are interrupted.
- US-A-5,560,807 describes a headbox in which a Fibrous suspension over a laterally flown, itself tapered channel, also known as a cross distributor, a battery of lengthways arranged diffuser tubes and supplied via a nozzle-like tapered material outlet is placed on a sieve.
- a Fibrous suspension over a laterally flown, itself tapered channel also known as a cross distributor
- a battery of lengthways arranged diffuser tubes and supplied via a nozzle-like tapered material outlet is placed on a sieve.
- To aggregates of Adding fiber suspension is a separate pressurizable Circuit provided, the outputs in the countercurrent direction in the Partition open, which separates the cross-distribution duct from the tube bundle.
- the supply of the aggregates can be controlled via valves.
- the additives such as starch or chemical Additives continuously and evenly across the width of the headbox are added, preferably in the direction of the thickness to be formed Fibrous web certain layers, especially the one on the wire first overlying layer of the fibrous web, with the additives become.
- EP-A-0 355 734 describes a method for producing a Fibrous web, in which an aggregate across the width of the fibrous web in different concentration continuously in the direction of movement Fibrous web is added, two for this purpose Fibrous suspensions are made, one of which is the Contains aggregate, which can be a dye.
- the Both pulp suspensions are via a plurality of discharge points across the width of the headbox either individually or in a predetermined Mix ratio applied to a forming fabric.
- the resulting fibrous web has one side to the other changing profile according to the concentration of the aggregate, for example a color, the thickness and weight per unit area are substantially unchanged across the width.
- a fiber suspension in low addition cans to add fluorescent fibers, for example can be excited to shine under UV light and especially for banknotes find widespread use.
- a disadvantage with such a statistical addition A fiber suspension is in particular that only the occurrence of fluorescent fibers must be sufficient as proof of authenticity without a certain local assignment and spatial distribution ultimately security over the origin of the paper there. Even with small additions, there is a risk that sections of paper the size of banknotes are completely devoid of such fibers are trained and are therefore unusable.
- the object of the invention is a method of the type mentioned to indicate that a better and at the same time more difficult to forge labeling allows a fibrous web.
- the crucial measure of the invention is that one in the Fibrous suspension introduced substance in several places over the Width of the fibrous web and is also initiated intermittently.
- An imitation of such a fibrous product requires much higher than known security papers Skills. It's not just about one Embedding security thread in the pulp (which is difficult enough), but also the exact positions of the discharge points, seen across the width of the headbox to comply with and - what is particularly difficult - the temporal sequence of the periods of initiation and the periods of non-initiation.
- Such clocking can be controlled individually and by the authorized user at any time can be easily modified. For example, with banknotes certain images assigned to certain banknote number ranges become.
- Colorants come as flowable media, powdery substances or material flows into consideration, which are in the finished Differentiate the fibrous web from the remaining pulp mass.
- substances can have special luminescent properties to have.
- fiber flows for marking differ significantly from the rest of the fiber suspension, for example by a high or low filler content, by a different fiber composition or concentration.
- Coming also introductory substances into consideration which only appear in the finished paper Appear when the paper is treated in a special way is, for example, when it is heated, moistened or stretched.
- An inlet 1 takes place from below in the middle for the segmented loading of the Forming unit 2.
- a central distributor with vibration damper 5 has one Inlet cone 3 on.
- One can also see 24 flexible lines 6 connected to the Forming unit 2 are connected. In the flexible lines 6 open on Central distributor of dilution water pipes 4, which are connected by a distribution pipe 7 are introduced.
- Figure 2 illustrates the principle of the invention in a schematic Representation in the plane shown in Figure 1d.
- the distribution pipe 7 shown curved.
- the flexible lines 6 are all of the same length.
- FIG. 3 shows further details of the forming unit 6.
Landscapes
- Paper (AREA)
- Credit Cards Or The Like (AREA)
- Nonwoven Fabrics (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren, bei dem Substanzen in oder vor dem Stoffauflauf einer Papiermaschine in eine Faserstoffsuspension eingeleitet werden, aus der eine laufende Faserstoffbahn gebildet wird, wobei die Einleitung an mehreren, über die Breite des Stoffauflaufs verteilten Stellen erfolgt. The invention relates to a method in which substances in or before Headbox of a paper machine introduced into a fiber suspension from which a running fibrous web is formed, the Introduction to several, distributed across the width of the headbox Places.
Es ist bekannt, bei Sicherheitspapieren, insbesondere Banknoten, Maßnahmen zu treffen, um eine Fälschung des Papiers zu erschweren oder unmöglich zu machen. Hierzu gehört vor allem das Einlegen eines Sicherheitsfadens in die Papierbahn. Der Sicherheitsfaden wird an einer solchen Stelle in die Papiermasse eingeführt, an der sich diese noch in mehr oder minder flüssigem Zustand befindet Der Sicherheitsfaden ist in der fertigen Papierbahn weitgehend in die Papiermasse eingebettet. Dabei erfolgt das Einführen des Sicherheitsfadens kontinuierlich, so daß der Streifen in der Papierbahn an keiner Stelle unterbrochen ist.It is known for security papers, in particular banknotes, Take measures to make it difficult to counterfeit the paper or impossible to make. Above all, this includes inserting one Security thread in the paper web. The security thread is on one such a place in the pulp where it is even more or in a less fluid state. The security thread is in the finished paper web largely embedded in the paper pulp. This is done the insertion of the security thread continuously so that the strip in the Paper web is not interrupted at any point.
Es ist auch möglich, zwei oder mehrere Sicherheitsfäden in die Papierbahn einzubetten. Die Streifen haben in diesem Falle einen gegenseitigen Abstand in Richtung der Papierbahnbreite gesehen. Auch hierbei erfolgt das Einlegen der Streifen kontinuierlich, so daß die Streifen in der fertigen Papierbahn nicht unterbrochen sind.It is also possible to put two or more security threads in the paper web embed. In this case, the strips are spaced apart seen in the direction of the web width. The insertion is also carried out here the strip is continuous so that the strip is not in the finished paper web are interrupted.
Von Fälschem wird immer wieder versucht, die Sicherheitsmaßnahmen zu umgehen. Eine Primitivmaßnahme besteht darin, den Sicherheitsfaden durch einen aufgedruckten Streifen zu imitieren. Raffiniertere Fälscher versuchen mit mehr oder minder Erfolg, den Papierherstellungsprozeß als solchen zu imitieren und dabei einen Sicherheitsfaden in die Papiermasse einzulagern. genauso wie dies eine autorisierte Papierfabrik tut. Das Prinzip des Einlagerns eines Sicherheitsfadens ist somit keine Gewähr für eine absolute Sicherheit. Counterfeiters keep trying to take security measures bypass. A primitive measure is to go through the security thread imitate a printed strip. More sophisticated counterfeiters try more or less success, the paper making process as such imitate and store a security thread in the paper pulp. just like an authorized paper mill does. The principle of storage a security thread is therefore no guarantee of absolute security.
US-A-5,560,807 beschreibt einen Stoffauflauf, bei dem eine Faserstoffsuspension über einen seitlich angeströmten, sich verjüngenden Kanal, der auch als Querverteiler bezeichnet wird, einer Batterie von längs angeordneten Diffusorrohren zugeführt und über einen düsenartig sich verjüngenden Stoffaustritt auf ein Sieb gegeben wird. Um Zuschlagstoffe der Faserstoffsuspension zuzusetzen, ist ein separater druckbeaufschlagbarer Kreislauf vorgesehen, dessen Ausgänge in Gegenstromrichtung in der Trennwand münden, die den Querverteilerkanal von dem Rohrbündel abtrennt. Die Zufuhr der Zuschlagstoffe kann über Ventile gesteuert werden. Es ist insbesondere erwünscht, daß die Zuschlagstoffe wie Stärke oder chemische Additive kontinuierlich und gleichmäßig über die Breite des Stoffauflaufs zugesetzt werden, wobei bevorzugt in Dickenrichtung der zu bildenden Faserstoffbahn bestimmte Lagen, insbesondere die auf dem Sieb als erstes aufliegende Lage der Faserstoffbahn, mit den Zuschlagstoffen beaufschlagt werden.US-A-5,560,807 describes a headbox in which a Fibrous suspension over a laterally flown, itself tapered channel, also known as a cross distributor, a battery of lengthways arranged diffuser tubes and supplied via a nozzle-like tapered material outlet is placed on a sieve. To aggregates of Adding fiber suspension is a separate pressurizable Circuit provided, the outputs in the countercurrent direction in the Partition open, which separates the cross-distribution duct from the tube bundle. The supply of the aggregates can be controlled via valves. It is particularly desirable that the additives such as starch or chemical Additives continuously and evenly across the width of the headbox are added, preferably in the direction of the thickness to be formed Fibrous web certain layers, especially the one on the wire first overlying layer of the fibrous web, with the additives become.
EP-A-0 355 734 beschreibt ein Verfahren zum Herstellen einer Faserstoffbahn, bei dem ein Zuschlagstoff über der Breite der Faserstoffbahn in unterschiedlicher Konzentration kontinuierlich in der Bewegungsrichtung der Faserstoffbahn zugegeben wird, wobei zu diesem Zweck zwei Faserstoffsuspensionen hergestellt werden, von denen die eine den Zuschlagstoff, bei dem es sich um einen Farbstoff handeln kann, enthält. Die beiden Faserstoffsuspensionen werden über eine Mehrzahl von Einleitstellen über der Breite des Stoffauflaufs entweder einzeln oder in einem vorgebbaren Verhältnis gemischt auf ein Formiersieb aufgetragen. Die hierdurch entstehende Faserstoffbahn weist ein von einer Seite zur anderen Seite sich änderndes gemäß der Konzentration des Zuschlagstoffs verlaufendes Profil, beispielsweise eine Färbung, wobei die Dicke und das Flächengewicht im wesentlichen über der Breite unverändert sind.EP-A-0 355 734 describes a method for producing a Fibrous web, in which an aggregate across the width of the fibrous web in different concentration continuously in the direction of movement Fibrous web is added, two for this purpose Fibrous suspensions are made, one of which is the Contains aggregate, which can be a dye. The Both pulp suspensions are via a plurality of discharge points across the width of the headbox either individually or in a predetermined Mix ratio applied to a forming fabric. The hereby The resulting fibrous web has one side to the other changing profile according to the concentration of the aggregate, for example a color, the thickness and weight per unit area are substantially unchanged across the width.
Aus der Praxis ist neben dem Einbringen eines Sicherheitsfadens in eine Faserstoffsuspension, die bereits den Stoffauflauf verlassen hat, auch das Vorsehen von zweidimensionalen Wasserzeichen bekannt, die durch entsprechend in dem Formiersieb vorgesehene Gegenformen das Wasserzeichen erzeugt werden. Besondere Verwendung finden solche Papiere als Substrat für den Druck von Banknoten und Scheckvordrucken. Sonst sind Wasserzeichen, die mit dem bloßen Auge erkennbar sind, oft unerwünscht, zumal bei beidseitig bedruckten Papieren die dünnen Stellen ein Durchscheinen des Aufdrucks nach sich ziehen. Practical is in addition to inserting a security thread into a fiber suspension that has already left the headbox, too the provision of two-dimensional watermarks known by corresponding counter-forms provided in the forming fabric Watermarks are generated. Such papers are particularly used as a substrate for printing banknotes and check forms. Otherwise are Watermarks that are visible to the naked eye, often undesirable, especially in the case of papers printed on both sides, the thin areas show through of the imprint.
Aus der Praxis ist es femer bekannt, einer Faserstoffsuspension in geringen Zugabedosen fluoreszierende Fasern beizugeben, die beispielsweise unter UV-Licht zum leuchten anregbar sind und insbesondere für Geldscheine verbreiteten Einsatz finden. Nachteilig bei einer solchen statistischen Zugabe zu einer Faserstoffsuspension ist insbesondere, daß lediglich das Auftreten der fluoreszierenden Fasern als Echtheitsnachweis reichen muß, ohne daß eine bestimmte örtliche Zuordnung und räumliche Verteilung letztlich Sicherheit über die Herkunft des Papiers gibt. Auch besteht bei geringen Zugaben die Gefahr, daß geldscheingroße Papierabschnitte gänzlich ohne solche Fasern ausgebildet sind und somit unbrauchbar sind. It is also known in practice to use a fiber suspension in low addition cans to add fluorescent fibers, for example can be excited to shine under UV light and especially for banknotes find widespread use. A disadvantage with such a statistical addition A fiber suspension is in particular that only the occurrence of fluorescent fibers must be sufficient as proof of authenticity without a certain local assignment and spatial distribution ultimately security over the origin of the paper there. Even with small additions, there is a risk that sections of paper the size of banknotes are completely devoid of such fibers are trained and are therefore unusable.
Aufgabe der Erfindung ist es, ein Verfahren der eingangs genannten Art anzugeben, das eine bessere und zugleich schwerer zu fälschende Kennzeichnung einer Faserstoffbahn ermöglicht.The object of the invention is a method of the type mentioned to indicate that a better and at the same time more difficult to forge labeling allows a fibrous web.
Diese Aufgabe wird mit einem derartigen Verfahren dadurch gelöst, daß die Substanzen an wenigstens einer der Stellen auf intermittierende Weise eingeleitet werden. This object is achieved with such a method in that the Substances in at least one of the locations in an intermittent manner be initiated.
Die entscheidende Maßnahme der Erfindung besteht darin, daß eine in die Faserstoffsuspension eingeleitete Substanz an mehreren Stellen über die Breite der Faserstoffbahn und außerdem zeitlich intermittierend eingeleitet wird. Damit ist es möglich, in die Faserstoffmasse ein Bild, ein Motiv oder eine Schrift einzubetten. Eine Nachahmung eines solchen Faserstoffproduktes erfordert gegenüber bekannten Sicherheitspapieren weitaus höhere Fertigkeiten. Es geht dabei nämlich keineswegs nur darum, einen Sicherheitsfaden in die Faserstoffmasse einzubetten (was schon schwierig genug ist), sondern auch noch die genauen Positionen der Einleitungsstellen, über die Breite des Stoffauflaufs hinweg gesehen, einzuhalten und - was besonders schwierig ist - die zeitliche Sequenz der Perioden des Einleitens und der Perioden des Nichteinleitens einzuhalten. So kann beispielsweise ein bestimmtes Bild durch ein ganz bestimmtes Takten der Einleitungsquellen über die Breite der Faserstoffbahn hinweg erzeugt werden. Ein solches Takten kann individuell steuerbar sein und durch den befugten Benutzer jederzeit leicht abgewandelt werden. So können beispielsweise bei Banknoten bestimmten Banknoten-Nummernkreisen bestimmte Bilder zugeordnet werden.The crucial measure of the invention is that one in the Fibrous suspension introduced substance in several places over the Width of the fibrous web and is also initiated intermittently. In order to it is possible to insert an image, a motif or a into the pulp Embed scripture. An imitation of such a fibrous product requires much higher than known security papers Skills. It's not just about one Embedding security thread in the pulp (which is difficult enough), but also the exact positions of the discharge points, seen across the width of the headbox to comply with and - what is particularly difficult - the temporal sequence of the periods of initiation and the periods of non-initiation. For example, a certain picture by a very specific timing of the introduction sources generated across the width of the fibrous web. Such clocking can be controlled individually and by the authorized user at any time can be easily modified. For example, with banknotes certain images assigned to certain banknote number ranges become.
Als Einleitungssubstanz kommen Feststoffe sowie fließfähige Medien in Betracht. Als fließfähige Medien kommen Farbstoffe, pulvrige Substanzen oder Stoffetröme in Betracht, die sich in der fertigen Faserstoffbahn ersichtlich von der übrigen Faserstoffmasse unterscheiden. Die Substanzen können beispielsweise besondere Lumineszenzeigenschaften haben. Auch ist es denkbar, zur Markierung Faserstoffströme einzuleiten, die sich in auffälliger Weise von der übrigen Faserstoffsuspension unterscheiden, beispielsweise durch einen hohen oder niedrigen Füllstoffgehalt, durch eine anders geartete Faserzusammensetzung oder Konzentration. Es kommen auch Einleitungssubstanzen in Betracht, die am fertigen Papier erst dann in Erscheinung treten, wenn das Papier auf eine besondere Weise behandelt wird, beispielsweise wenn es erwärmt, befeuchtet oder gedehnt wird.As an introductory substance come solids as well flowable media into consideration. Colorants come as flowable media, powdery substances or material flows into consideration, which are in the finished Differentiate the fibrous web from the remaining pulp mass. The For example, substances can have special luminescent properties to have. It is also conceivable to initiate fiber flows for marking differ significantly from the rest of the fiber suspension, for example by a high or low filler content, by a different fiber composition or concentration. Coming also introductory substances into consideration, which only appear in the finished paper Appear when the paper is treated in a special way is, for example, when it is heated, moistened or stretched.
Die Erfindung ist anhand der Zeichnungen näher erläutert.
Ein Zulauf 1 erfolgt von unten her mittig zur segmentierten Beschickung der
Formiereinheit 2. Ein Zentralverteiler mit Schwingungsdämpfer 5 weist einen
Zulaufkonus 3 auf. Man erkennt ferner 24 flexible Leitungen 6, die an die
Formiereinheit 2 angeschlossen sind. In die flexiblen Leitungen 6 münden am
Zentralverteiler Verdünnungswasserleitungen 4, die von einem Verteilrohr 7
herangeführt sind.An
Figur 2 veranschaulicht das erfindungsgemäße Prinzip in schematischer
Darstellung in der in Figur 1d dargestellten Ebene. Hierbei ist das Verteilrohr 7
gekrümmt dargestellt. Die flexiblen Leitungen 6 sind allesamt gleich lang.Figure 2 illustrates the principle of the invention in a schematic
Representation in the plane shown in Figure 1d. Here, the
Figur 3 zeigt weitere Einzelheiten der Formiereinheit 6.FIG. 3 shows further details of the forming
Claims (12)
- A process in which substances (8) are introduced in or in front of the headbox of a paper machine into a fibre suspension, from which a continuous fibre material web is formed, wherein the introduction takes place at a plurality of locations spaced apart over the width of the headbox, characterised in that the substances (8) are introduced intermittently at at least one of the locations.
- A process according to Claim 1, characterised in that at least one of the substances (8) is a liquid.
- A process according to Claim 1, characterised in that at least one of the substances (8) is a powder.
- A process according to Claim 1 or 3, characterised in that at least one of the substances (8) is a solid.
- A process according to any one of Claims 1 to 4, characterised in that at least one of the substances (8) is a dye.
- A process according to any one of Claims 1 to 5, characterised in that the introduction of the substances (8) can be controlled in relation to its quantity.
- A process according to any one of Claims 1 to 6, characterised in that the introduction of the substances (8) can be controlled in relation to the introduction period.
- A process according to the any one of Claims 1 to 7, characterised in that the fibre suspension is fed to a central distributor (5), and from the latter is fed in several partial flows (6) to a screen of the headbox.
- A process according to Claim 8, characterised in that a diluent liquid (7,4) is added to the partial flows (6), wherein the substances (8) are added to the diluent liquid (7,4).
- A process according to any one of Claims 1 to 9, characterised in that the substances (8) in the fibre material web, which is formed from the fibre suspension, appear as an image, motif or script.
- A process according to any one of Claims 1 to 10, characterised in that a paper web is formed from the fibre suspension.
- A process according to Claim 11, characterised in that one piece of the paper web is used as a security paper, in particular a banknote.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19644867 | 1996-10-29 | ||
| DE19644867 | 1996-10-29 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0839950A2 EP0839950A2 (en) | 1998-05-06 |
| EP0839950A3 EP0839950A3 (en) | 1998-12-09 |
| EP0839950B1 true EP0839950B1 (en) | 2003-05-28 |
Family
ID=7810270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97118504A Expired - Lifetime EP0839950B1 (en) | 1996-10-29 | 1997-10-24 | Process to introduce substances in a moving fiber web |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0839950B1 (en) |
| AT (1) | ATE241727T1 (en) |
| DE (1) | DE59710160D1 (en) |
| ES (1) | ES2199320T3 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7367592B1 (en) * | 1998-06-16 | 2008-05-06 | Whd Elektronische Prueftechnik Gmbh | Marking substance and security markings for testing the authenticity of documents |
| RU2331725C1 (en) * | 2006-11-29 | 2008-08-20 | Федеральное Государственное Унитарное Предприятие "Гознак" (Фгуп "Гознак") | Method for manufacturing bond paper protected from forgery and such bond paper |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4940512A (en) * | 1988-08-18 | 1990-07-10 | E. I. Du Pont De Nemours And Co.Ny | Cross-directional distribution of additives in synthetic papers |
| US5560807A (en) * | 1995-03-29 | 1996-10-01 | Beloit Technologies, Inc. | Headbox additive injection system |
-
1997
- 1997-10-24 AT AT97118504T patent/ATE241727T1/en not_active IP Right Cessation
- 1997-10-24 EP EP97118504A patent/EP0839950B1/en not_active Expired - Lifetime
- 1997-10-24 ES ES97118504T patent/ES2199320T3/en not_active Expired - Lifetime
- 1997-10-24 DE DE59710160T patent/DE59710160D1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| ES2199320T3 (en) | 2004-02-16 |
| DE59710160D1 (en) | 2003-07-03 |
| ATE241727T1 (en) | 2003-06-15 |
| EP0839950A3 (en) | 1998-12-09 |
| EP0839950A2 (en) | 1998-05-06 |
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