EP2116385A1 - Paper with security impression - Google Patents

Paper with security impression Download PDF

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Publication number
EP2116385A1
EP2116385A1 EP09005264A EP09005264A EP2116385A1 EP 2116385 A1 EP2116385 A1 EP 2116385A1 EP 09005264 A EP09005264 A EP 09005264A EP 09005264 A EP09005264 A EP 09005264A EP 2116385 A1 EP2116385 A1 EP 2116385A1
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EP
European Patent Office
Prior art keywords
paper
marking
printed
raster points
area
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
EP09005264A
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German (de)
French (fr)
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EP2116385B1 (en
Inventor
Helmut Herrmann
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Herrmann Druck and Media GmbH
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Herrmann Druck and Media GmbH
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/333—Watermarks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/14—Security printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/14—Security printing
    • B41M3/146—Security printing using a non human-readable pattern which becomes visible on reproduction, e.g. a void mark
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B42D25/29—Securities; Bank notes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44F—SPECIAL DESIGNS OR PICTURES
    • B44F1/00—Designs or pictures characterised by special or unusual light effects
    • B44F1/08—Designs or pictures characterised by special or unusual light effects characterised by colour effects
    • B44F1/10—Changing, amusing, or secret pictures
    • 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
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
    • G03C5/08—Photoprinting; Processes and means for preventing photoprinting
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/04—Preventing copies being made of an original
    • G03G21/046—Preventing copies being made of an original by discriminating a special original, e.g. a bank note

Definitions

  • the invention relates to a paper with a printed label.
  • Copiers are able to reproduce documents of such good quality that often a difference between the original and a copy is no longer easily detectable, since the quality of both documents is often similarly good.
  • more and more documents are created completely with color laser printers, so that no difference in the printing technology to color copiers is noticeable.
  • contracts, certificates, documents or the like it should be possible to ensure that as far as possible anyone can clearly determine whether it is an original or a copy in order to prevent abuse and forgery.
  • a paper is known with a screen printing, which consists of at least two different in number of lines, same color grid patterns each with regularly distributed grid points, one of which forms a basic grid and the other a text inserted into the basic grid, on the original of the human eye not immediately readable.
  • the halftone dots of one screen pattern are essentially no longer resolved, but those of the other screen pattern with a smaller number of lines are displayed.
  • the halftone tonal range ie, the area occupied by the halftone dots with respect to the entire area, is about the same for both halftone patterns, and the two halftone patterns face each other different screen angles.
  • the marking or the security feature on the original is clearly visible. It is just unreadable.
  • the imprinted halftone tone value for the security feature has about 30% area coverage and therefore appears as a clearly visible area in a medium gray hue.
  • a paper with a printed label which is at least largely invisible to the human eye and is visible on a copy of the paper produced on a copier.
  • the marking can be freely designed in shape and size and adapted to the technical requirements or to customer requirements. It can have any form of writing, pattern or graphic elements or a combination thereof.
  • the mark is not visible on the original. However, if the original is copied on a copier, the mark appears superimposed on the text, image, drawing or the like of the original. For example, the word "copy” can be selected as the marking, which appears automatically on the copies. This measure can easily prevent abuse and counterfeiting.
  • the labeling can be adapted to the wishes of a customer.
  • the screen angle is preferably adjusted in the contour of the marking in order to ensure an optimal result.
  • the printing of the marking feature and the surrounding area preferably takes place in the same color. There is no special color such as "anthracite gray" required.
  • black ink is used, which is usually used for text printing.
  • the halftone tone value range is preferably below 15%, in particular below 10%. This ensures that the surrounding area (background) on the copy does not contain any copied halftone dots and thus has the color of the copy paper (usually white). If a basic grid surrounding the license plate is provided in the paper according to the invention, preferably no image is generated in the case of a copy thereof. The surrounding basic grid is preferably not reproduced, ie it does not produce a gray tone, but it disappears completely.
  • the area surrounding the license plate is also preferably printed, in particular to the outermost edge of the paper.
  • the surrounding area is printed so that the print is invisible to the human eye.
  • the security paper for the viewer acts as a blank sheet, d. H. the complete safety tag and the surrounding area remain invisible.
  • the paper according to the invention it is not necessary to overprint the marking or the marking feature with a lighter or transparent color.
  • a decorative design used for overpressure.
  • the area surrounding the license plate is preferably not printed with parallel lines.
  • fine micro-grid points are preferably used, which are not reproduced during copying.
  • the raster width of the tag and the surrounding area are not necessarily integer multiples of each other, but may be independent of each other.
  • the grid of labeling may be adapted to and adapted to the technical conditions, customer-specific or due to technical developments in future copiers, for example the type of paper. Since no colored fogging imprint is required, the entire imprint can be done with normal, dark standard ink.
  • the license plate according to the present invention is not only unreadable or unrecognizable, but it is not visible to the human eye. In the cases of the prior art, where an illegible or unrecognizable mark is provided, the marks are also clearly visible on the original to the human eye.
  • a marking is printed on both sides of the paper. It can be provided on the one hand that on different sides of the paper different markings are printed. On the other hand, it is conceivable to print the same label on both sides of the paper, so that it does not matter on which side of the paper the original text is printed. It must therefore not be taken when inserting the paper according to the invention that this is placed correctly around in a printer.
  • the marking is printed by means of grid points.
  • the imprint is advantageously carried out by means of differently sized grid points for the marking on the one hand and the area surrounding the marking on the other hand.
  • the size of the halftone dots and the distances between the halftone dots are chosen such that the marking printed by means of halftone dots is not available to the human eye or only when searching carefully, if one knows that the label must be present, or if tools such as a magnifying glass are used , is visible.
  • the halftone dots and the distance between the halftone dots for the marking are selected so that the halftone dots are resolved by a copier and when copying the paper, the corresponding label appears on the copy.
  • the ratio of halftone dots and distance is preferably 1:10 to 1:25 at a resolution of about 0.20 to 0.60 mm, more preferably 1:15 to 1: 25 at a resolution of about 0.25 to zero , 45 mm.
  • the area surrounding the marking is printed with screen dots which are smaller than the grid points of the marking.
  • so-called "microdots” can be selected as screen dots for the area surrounding the marking, which are not detected by a copier and thus are not copied. These microdots are preferably smaller by a factor of 2 to 4 or 2 to 5 than the halftone dots of the label.
  • the entire paper is printed on at least one side with halftone dots.
  • the halftone dots are preferably in a dark color, e.g. B. black or dark blue, printed.
  • the ratio of the halftone dot size to the distance between two halftone dots is the same for the tag and the area surrounding the tag, it can be ensured that the tag and the surrounding area have the same area coverage.
  • the halftone dots of the marking and the surrounding area have exactly the same optical brightness (tonal value), as this does not make the marking visible to the human eye as a result of brightness differences.
  • the paper may preferably be provided with an individual watermark.
  • the term "original” may be incorporated as a watermark in the paper. This measure makes it particularly easy to distinguish the copy from the original. In order to check whether a document is an original or a copy, no technical aids or equipment are required.
  • additional optical elements constructed so that copiers are technically capable of preventing copying for counterfeit purposes. These elements can be printed in addition to the described marking and the surrounding area.
  • the additional optical elements are a pattern which is recognized by a copier or scanner and results in that the copier does not make a copy or at least does not make a color copy or the scanned document can not be processed.
  • the single figure shows a paper 1, on which a label 2 is printed.
  • the marking 2 is formed by printed grid points 3.
  • the area surrounding the marking area 4 is likewise formed by grid points.
  • the distance between the grid points 3 is greater than the distance between the points of the area 4.
  • the figure shows that the entire paper is printed with halftone dots.
  • all halftone dots have been made visible here.
  • the grid points 3 of the marking 2 are printed so small and at such a distance that they are virtually invisible to the human eye. However, they can be resolved by a copier and thus appear on a copy of the paper 1 made in a copier.
  • the halftone dots of the area 4 are printed in such a size and at a distance that they are invisible to the human eye. However, they are printed so small that they can not be resolved by a copier and thus do not appear on the copy of the paper 1.
  • the paper 1 may additionally have an individual watermark 5.
  • the watermark 5 is also introduced into the paper 1 after papermaking. It can be designed according to the wishes of a customer.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Finance (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Credit Cards Or The Like (AREA)
  • Cleaning In Electrography (AREA)
  • Printing Methods (AREA)
  • Editing Of Facsimile Originals (AREA)

Abstract

The paper (1) comprises an imprinted marking (2), which is invisible for the human eye and is visible on a copy of the paper produced on a photocopying apparatus, and a water-mark (5). The marking is imprinted on both sides of the paper by raster points (3). An area (4) surrounding the marking is printed on with raster points that is smaller than the raster points of the marking. The entire paper is printed on one side with raster points. The ratio of the raster point size to the distance between two raster points is identical. The both raster points have same optical brightness. The paper (1) comprises an imprinted marking (2), which is invisible for the human eye and is visible on a copy of the paper produced on a photocopying apparatus, and a water-mark (5). The marking is imprinted on both sides of the paper by raster points (3). An area (4) surrounding the marking is printed on with raster points that is smaller than the raster points of the marking. The entire paper is printed on one side with raster points. The ratio of the raster point size to the distance between two raster points is identical. The both raster points have same optical brightness. The water-mark is brought into the paper after the paper production. A pattern is intended, which is recognized by a copier or a scanner.

Description

Die Erfindung betrifft ein Papier mit einer aufgedruckten Kennzeichnung.The invention relates to a paper with a printed label.

Kopiergeräte sind in der Lage, Schriftstücke mit einer solch guten Qualität zu reproduzieren, dass häufig ein Unterschied zwischen dem Original und einer Kopie nicht mehr einfach feststellbar ist, da die Qualität beider Schriftstücke häufig ähnlich gut ist. Außerdem werden immer mehr Dokumente komplett mit Farblaserdruckern erstellt, sodass kein Unterschied in der Drucktechnik zu Farbkopierern feststellbar ist. Bei Verträgen, Zeugnissen, Urkunden oder dergleichen sollte jedoch sichergestellt werden können, dass möglichst jedermann eindeutig feststellen kann, ob es sich um ein Original oder eine Kopie handelt, um Missbrauch und Fälschungen vorbeugen zu können.Copiers are able to reproduce documents of such good quality that often a difference between the original and a copy is no longer easily detectable, since the quality of both documents is often similarly good. In addition, more and more documents are created completely with color laser printers, so that no difference in the printing technology to color copiers is noticeable. In the case of contracts, certificates, documents or the like, however, it should be possible to ensure that as far as possible anyone can clearly determine whether it is an original or a copy in order to prevent abuse and forgery.

Aus der DE 34 24 156 C2 ist ein Papier mit einem Rasteraufdruck bekannt, der aus mindestens zwei in der Linienanzahl unterschiedlichen, gleichfarbigen Rastermustern mit jeweils regelmäßig verteilten Rasterpunkten besteht, von denen das eine ein Grundraster und das andere einen in das Grundraster eingefügten Text bildet, der auf dem Original vom menschlichen Auge nicht unmittelbar lesbar ist. Beim Kopieren bzw. Reproduzieren des Originals werden die Rasterpunkte des einen Rastermusters im Wesentlichen nicht mehr aufgelöst, diejenigen des anderen Rastermusters mit dazu geringerer Linienanzahl jedoch abgebildet. Der Rastertonwertumfang, d. h. die von den Rasterpunkten eingenommene Fläche in Bezug auf die gesamte Fläche, ist bei beiden Rastermustern etwa gleich, und die beiden Rastermuster weisen zueinander unterschiedliche Rasterwinkel auf. Bei dieser Ausgestaltung ist die Kennzeichnung bzw. das Sicherheitsmerkmal auf dem Original deutlich sichtbar. Es ist lediglich nicht lesbar. Der aufgedruckte Rastertonwert für das Sicherheitsmerkmal weist dabei etwa 30 % Flächendeckung auf und erscheint deshalb als deutlich sichtbare Fläche in einem mittelgrauen Farbton.From the DE 34 24 156 C2 a paper is known with a screen printing, which consists of at least two different in number of lines, same color grid patterns each with regularly distributed grid points, one of which forms a basic grid and the other a text inserted into the basic grid, on the original of the human eye not immediately readable. When copying or reproducing the original, the halftone dots of one screen pattern are essentially no longer resolved, but those of the other screen pattern with a smaller number of lines are displayed. The halftone tonal range, ie, the area occupied by the halftone dots with respect to the entire area, is about the same for both halftone patterns, and the two halftone patterns face each other different screen angles. In this embodiment, the marking or the security feature on the original is clearly visible. It is just unreadable. The imprinted halftone tone value for the security feature has about 30% area coverage and therefore appears as a clearly visible area in a medium gray hue.

Aus der DE 28 19 640 C2 ist es bekannt, eine Warnmarkierung und einen Untergrundton auf einem Papier aufzubringen und mit einem Verschleierungsaufdruck zu überdecken. Dies bedeutet, dass das gesamte Sicherheitsmerkmal auf dem Original deutlich sichtbar ist. Es erscheint als dekoratives Element, das in verschiedenen Mustern gedruckt werden kann und ein angenehmes Aussehen auf der Oberfläche besitzt.From the DE 28 19 640 C2 It is known to apply a warning mark and a background tone to a paper and cover it with a fogging imprint. This means that the entire security feature is clearly visible on the original. It appears as a decorative element that can be printed in various patterns and has a pleasing appearance on the surface.

Aus der DE 34 19 859 A1 ist es bekannt, eine Warnmarkierung auf ein Papier mit feinen Elementbestandteilen aufzudrucken, wobei ein umgebender Hintergrund auf die Oberfläche des Papiers in der gleichen Ebene wie die Warnmarkierung ebenfalls mit feinen Elementbestandteilen, aber in einer anderen Konfiguration aufgedruckt ist. Die Elementbestandteile der Warnmarkierung und des Hintergrundes weisen die gleiche Farbe und gleiche Dichte auf. Ein dekoratives Design wird über die Warnmarkierung und den Hintergrund mit einer helleren Farbe und einer transparenten Tinte, die durch Kopierer nicht reproduzierbar ist, derart gedruckt, dass die Warnmarkierung mit dem bloßen Auge nicht erkennbar ist. Auch in diesem Fall ist das Sicherheitsmerkmal auf dem Original deutlich sichtbar. Es erscheint als dekoratives Element, das in verschiedenen Muster gedruckt werden kann und ein angenehmes Aussehen auf der Oberfläche besitzt.From the DE 34 19 859 A1 It is known to print a warning mark on a paper with fine constituent elements, wherein a surrounding background on the surface of the paper in the same plane as the warning mark is also printed with fine constituent elements but in a different configuration. The constituent elements of the warning mark and the background have the same color and the same density. A decorative design is printed over the warning mark and the background with a lighter color and a transparent ink that is not reproducible by copiers, so that the warning mark is not visible to the naked eye. Also in this case the security feature is clearly visible on the original. It appears as a decorative element that can be printed in various patterns and has a pleasant appearance on the surface.

Aufgabe der vorliegenden Erfindung ist es deshalb, ein verbessertes Papier bereitzustellen, mit dem Missbrauch und Fälschungen vorgebeugt werden kann.It is therefore an object of the present invention to provide an improved paper with which abuse and counterfeiting can be prevented.

Gelöst wird diese Aufgabe erfindungsgemäß auf einfache und überraschende Art und Weise durch ein Papier mit einer aufgedruckten Kennzeichnung, die für das menschliche Auge zumindest weitestgehend unsichtbar ist und auf einer auf einem Kopiergerät erzeugten Kopie des Papiers sichtbar ist. Die Kennzeichnung kann in Form und Größe frei gestaltet und an die technischen Erfordernisse oder an Kundenwünsche angepasst werden. Sie kann beliebige Formen von Schrift, Muster oder grafischen Elementen aufweisen oder eine Kombination daraus.This object is achieved according to the invention in a simple and surprising manner by a paper with a printed label, which is at least largely invisible to the human eye and is visible on a copy of the paper produced on a copier. The marking can be freely designed in shape and size and adapted to the technical requirements or to customer requirements. It can have any form of writing, pattern or graphic elements or a combination thereof.

Wird ein Text, ein Bild, eine Zeichnung oder dergleichen auf ein solches Papier geschrieben, kopiert oder gedruckt, so ist die Kennzeichnung auf dem Original nicht sichtbar. Wird jedoch das Original auf einem Kopiergerät kopiert, so erscheint überlagert zu dem Text, dem Bild, der Zeichnung oder dergleichen des Originals die Kennzeichnung. Beispielsweise kann als Kennzeichnung das Wort "Kopie" gewählt werden, welches auf den Kopien automatisch erscheint. Durch diese Maßnahme kann Missbrauch und Fälschungen auf einfache Art und Weise vorgebeugt werden. Dabei kann die Kennzeichnung nach den Wünschen eines Kunden angepasst werden.When a text, a picture, a drawing or the like is written, copied or printed on such a paper, the mark is not visible on the original. However, if the original is copied on a copier, the mark appears superimposed on the text, image, drawing or the like of the original. For example, the word "copy" can be selected as the marking, which appears automatically on the copies. This measure can easily prevent abuse and counterfeiting. The labeling can be adapted to the wishes of a customer.

Bei der erfindungsgemäßen Ausgestaltung ist keine unterschiedliche Rasterwinkelung erforderlich. Die Rasterwinkelung wird vorzugsweise im Konturverlauf der Kennzeichnung angepasst, um damit ein optimales Ergebnis sicherzustellen. Der Druck des Kennzeichnungsmerkmals und des umgebenden Bereichs erfolgt vorzugsweise in der gleichen Farbe. Es ist dazu keine Sonderfarbe wie beispielsweise "Anthrazitgrau" erforderlich. Vorzugsweise wird dazu schwarze Druckfarbe verwendet, die für den Textdruck üblicherweise eingesetzt wird.In the embodiment according to the invention no different screen angle is required. The screen angle is preferably adjusted in the contour of the marking in order to ensure an optimal result. The printing of the marking feature and the surrounding area preferably takes place in the same color. There is no special color such as "anthracite gray" required. Preferably black ink is used, which is usually used for text printing.

Sowohl für die Kennzeichnung als auch für den umgebenden Bereich, der ebenfalls bedruckt sein kann, liegt der Rastertonwertumfang vorzugsweise unterhalb von 15 %, insbesondere unterhalb von 10 %. Dadurch kann sichergestellt werden, dass auf der Kopie der umgebende Bereich (Hintergrund) keine kopierten Rasterpunkte enthält und somit die Farbe des Kopierpapiers (in aller Regel weiß) aufweist. Wenn bei dem efindungsgemäßen Papier ein das Kennzeichen umgebendes Grundraster vorgesehen ist, wird bei einer Kopie davon vorzugsweise keine Abbildung erzeugt. Das umgebende Grundraster wird vorzugsweise nicht reproduziert, d. h. es entsteht kein Grauton, sondern es verschwindet vollständig.For both the marking and the surrounding area, which may also be printed, the halftone tone value range is preferably below 15%, in particular below 10%. This ensures that the surrounding area (background) on the copy does not contain any copied halftone dots and thus has the color of the copy paper (usually white). If a basic grid surrounding the license plate is provided in the paper according to the invention, preferably no image is generated in the case of a copy thereof. The surrounding basic grid is preferably not reproduced, ie it does not produce a gray tone, but it disappears completely.

Der das Kennzeichen umgebende Bereich wird vorzugweise ebenfalls bedruckt, insbesondere bis zum äußersten Papierrand. Allerdings wird der umgebende Bereich so bedruckt, dass die Bedruckung für das menschliche Auge nicht sichtbar ist. Dadurch wirkt das Sicherheitspapier für den Betrachter wie ein leeres Blatt, d. h. das komplette Sicherheits-Kennzeichen und der umgebende Bereich bleiben unsichtbar.The area surrounding the license plate is also preferably printed, in particular to the outermost edge of the paper. However, the surrounding area is printed so that the print is invisible to the human eye. As a result, the security paper for the viewer acts as a blank sheet, d. H. the complete safety tag and the surrounding area remain invisible.

Bei dem erfindungsgemäßen Papier ist es nicht notwendig, die Kennzeichnung bzw. das Kennzeichnungsmerkmal mit einer helleren bzw. transparenten Farbe zu überdrucken. Ebenso wenig wird ein dekoratives Design für einen Überdruck eingesetzt. Der das Kennzeichen umgebende Bereich wird vorzugsweise nicht mit parallelen Linien bedruckt. Für den das Kennzeichen umgebenden Bereich werden vorzugsweise lediglich so genannte feine Mikrorasterpunkte verwendet, die beim Kopieren nicht reproduziert werden. Die Rasterweite der Kennzeichnung sowie des umgebenden Bereichs sind nicht notwendigerweise ganzzahlige Vielfache voneinander, sondern können voneinander unabhängig sein. Das Raster des Kennzeichnens kann an die technischen Rahmenbedingungen, kundenspezifisch oder bedingt durch technische Entwicklung bei künftigen Kopiergeräten, zum Beispiel die Papiersorte, angepasst und darauf abgestimmt sein. Da kein farbiger Verschleierungsaufdruck benötigt wird, kann der gesamte Aufdruck mit normaler, dunkler Standarddruckfarbe erfolgen.In the case of the paper according to the invention, it is not necessary to overprint the marking or the marking feature with a lighter or transparent color. Nor is a decorative design used for overpressure. The area surrounding the license plate is preferably not printed with parallel lines. For the area surrounding the mark, only so-called fine micro-grid points are preferably used, which are not reproduced during copying. The raster width of the tag and the surrounding area are not necessarily integer multiples of each other, but may be independent of each other. The grid of labeling may be adapted to and adapted to the technical conditions, customer-specific or due to technical developments in future copiers, for example the type of paper. Since no colored fogging imprint is required, the entire imprint can be done with normal, dark standard ink.

Im Gegensatz zu bekannten Papieren ist das Kennzeichen gemäß der vorliegenden Erfindung nicht nur nicht lesbar oder nicht erkennbar, sondern es ist für das menschliche Auge nicht sichtbar. In den Fällen des Standes der Technik, wo ein nicht lesbares oder nicht erkennbares Kennzeichen vorgesehen ist, sind die Kennzeichen auch auf dem Original für das menschliche Auge deutlich sichtbar.In contrast to known papers, the license plate according to the present invention is not only unreadable or unrecognizable, but it is not visible to the human eye. In the cases of the prior art, where an illegible or unrecognizable mark is provided, the marks are also clearly visible on the original to the human eye.

Bei einer besonders bevorzugten Ausgestaltung kann vorgesehen sein, dass eine Kennzeichnung auf beiden Seiten des Papiers aufgedruckt ist. Dabei kann zum einen vorgesehen sein, dass auf unterschiedlichen Seiten des Papiers unterschiedliche Kennzeichnungen aufgedruckt sind. Andererseits ist es denkbar, auf beiden Seiten des Papiers dieselbe Kennzeichnung aufzudrucken, sodass es gleichgültig ist, auf welche Seite des Papiers der Originaltext aufgedruckt wird. Es muss daher beim Einlegen des erfindungsgemäßen Papiers nicht darauf geachtet werden, dass dieses richtig herum in einen Drucker eingelegt wird.In a particularly preferred embodiment it can be provided that a marking is printed on both sides of the paper. It can be provided on the one hand that on different sides of the paper different markings are printed. On the other hand, it is conceivable to print the same label on both sides of the paper, so that it does not matter on which side of the paper the original text is printed. It must therefore not be taken when inserting the paper according to the invention that this is placed correctly around in a printer.

Vorteilhafterweise ist die Kennzeichnung mittels Rasterpunkten aufgedruckt. Dabei erfolgt der Aufdruck vorteilhafterweise mittels unterschiedlich großen Rasterpunkten für die Kennzeichnung einerseits und den die Kennzeichnung umgebenden Bereich andererseits. Die Größe der Rasterpunkte und die Abstände zwischen den Rasterpunkten sind so gewählt, dass die mittels Rasterpunkten aufgedruckte Kennzeichnung für das menschliche Auge nicht oder nur bei genauem Suchen, wenn man weiß, dass die Kennzeichnung vorhanden sein muss, oder bei Verwendung von Hilfsmitteln wie einer Lupe, sichtbar ist. Dabei sind die Rasterpunkte und der Abstand zwischen den Rasterpunkten für die Kennzeichnung so gewählt, dass die Rasterpunkte durch ein Kopiergerät aufgelöst werden und beim Kopieren des Papiers die entsprechende Kennzeichnung auf der Kopie erscheint. Das Verhältnis von Rasterpunkten und Abstand ist vorzugsweise 1 : 10 bis 1 : 25 bei einer Auflösung von ca. 0,20 bis 0,60 mm , besonders bevorzugt 1 : 15 bis 1 : 25 bei einer Auflösung von ca. 0,25 bis 0,45 mm.Advantageously, the marking is printed by means of grid points. The imprint is advantageously carried out by means of differently sized grid points for the marking on the one hand and the area surrounding the marking on the other hand. The size of the halftone dots and the distances between the halftone dots are chosen such that the marking printed by means of halftone dots is not available to the human eye or only when searching carefully, if one knows that the label must be present, or if tools such as a magnifying glass are used , is visible. The halftone dots and the distance between the halftone dots for the marking are selected so that the halftone dots are resolved by a copier and when copying the paper, the corresponding label appears on the copy. The ratio of halftone dots and distance is preferably 1:10 to 1:25 at a resolution of about 0.20 to 0.60 mm, more preferably 1:15 to 1: 25 at a resolution of about 0.25 to zero , 45 mm.

Besonders bevorzugt ist es, wenn der die Kennzeichnung umgebende Bereich mit Rasterpunkten bedruckt ist, die kleiner sind als die Rasterpunkte der Kennzeichnung. Insbesondere können als Rasterpunkte für den die Kennzeichnung umgebenden Bereich so genannte "Mikropunkte" gewählt werden, die durch ein Kopiergerät nicht erfasst werden und somit nicht kopiert werden. Diese Mikropunkte sind vorzugsweise etwa um einen Faktor 2 bis 4 oder 2 bis 5 kleiner als die Rasterpunkte der Kennzeichnung. Durch das Vorsehen unterschiedlicher Rasterpunkte bzw. von Rasterpunkten im die Kennzeichnung umgebenden Bereich kann sichergestellt werden, dass das menschliche Auge die Kennzeichnung nicht auflösen kann.It is particularly preferred if the area surrounding the marking is printed with screen dots which are smaller than the grid points of the marking. In particular, so-called "microdots" can be selected as screen dots for the area surrounding the marking, which are not detected by a copier and thus are not copied. These microdots are preferably smaller by a factor of 2 to 4 or 2 to 5 than the halftone dots of the label. By providing different halftone dots or halftone dots in the area surrounding the marking, it can be ensured that the human eye can not resolve the marking.

Zu diesem Zweck ist es weiterhin vorteilhaft, wenn das gesamte Papier zumindest einseitig mit Rasterpunkten bedruckt ist. Die Rasterpunkte sind vorzugsweise in einer dunklen Farbe, z. B. schwarz oder dunkelblau, aufgedruckt.For this purpose, it is also advantageous if the entire paper is printed on at least one side with halftone dots. The halftone dots are preferably in a dark color, e.g. B. black or dark blue, printed.

Wenn das Verhältnis der Rasterpunktgröße zum Abstand zwischen zwei Rasterpunkten für die Kennzeichnung und den die Kennzeichnung umgebenden Bereich gleich ist, kann sichergestellt werden, dass Kennzeichnung und umgebender Bereich die gleiche Flächendeckung aufweisen.If the ratio of the halftone dot size to the distance between two halftone dots is the same for the tag and the area surrounding the tag, it can be ensured that the tag and the surrounding area have the same area coverage.

Vorteilhafterweise weisen die Rasterpunkte der Kennzeichnung und des umgebenden Bereichs genau die optisch gleiche Helligkeit (Tonwert) auf, da dadurch die Kennzeichnung für das menschliche Auge nicht durch Helligkeitsunterschiede sichtbar wird.Advantageously, the halftone dots of the marking and the surrounding area have exactly the same optical brightness (tonal value), as this does not make the marking visible to the human eye as a result of brightness differences.

Weitere Vorteile ergeben sich, wenn das Papier ein Wasserzeichen aufweist. Das Papier kann vorzugsweise mit einem individuellen Wasserzeichen versehen sein. Beispielsweise kann der Begriff "Original" als Wasserzeichen in das Papier eingebracht sein. Durch diese Maßnahme kann besonders einfach die Kopie vom Original unterschieden werden. Zu einer Überprüfung, ob es sich bei einem Schriftstück um ein Original oder eine Kopie handelt, sind somit keinerlei technische Hilfsmittel oder Geräte mehr erforderlich.Further advantages arise when the paper has a watermark. The paper may preferably be provided with an individual watermark. For example, the term "original" may be incorporated as a watermark in the paper. This measure makes it particularly easy to distinguish the copy from the original. In order to check whether a document is an original or a copy, no technical aids or equipment are required.

Kostengünstig ist es, wenn ein (individuelles) Wasserzeichen nach der Papierherstellung in das Papier eingebracht wird. Dabei kann insbesondere eine chemische Aufhellung im Bereich des Wasserzeichens erfolgen. Ein derart eingebrachtes Wasserzeichen kann bereits bei kleinen Mengen wirtschaftlich und kostengünstig hergestellt werden, während ein bei der Papierherstellung eingebrachtes Wasserzeichen ausschließlich in Großmengen (verbunden mit sehr hohen Werkzeugkosten) produziert werden kann.It is cost-effective if an (individual) watermark is introduced into the paper after papermaking. In particular, a chemical whitening in the region of the watermark can take place. Such incorporated watermark can be produced economically and inexpensively even with small amounts, while a watermark introduced in papermaking can be produced only in large quantities (associated with very high tooling costs).

Eine noch höhere Sicherheit gegen unerlaubte originalgetreue Kopien kann mittels zusätzlicher optischer Elemente erreicht werden, die so aufgebaut sind, dass Kopierer technisch in der Lage sind, das Kopieren zum Zwecke der Fälschung zu verhindern. Diese Elemente können zusätzlich zu der beschriebenen Kennzeichnung und dem umgebenden Bereich aufgedruckt werden. Insbesondere handelt es sich bei den zusätzlichen optischen Elementen um ein Muster, welches durch einen Kopierer oder Scanner erkannt wird und dazu führt, dass der Kopierer keine Kopie anfertigt oder zumindest keine Farbkopie anfertigt bzw. das eingescannte Dokument nicht bearbeitet werden kann.Even greater security against unauthorized faithful copies can be achieved by means of additional optical elements constructed so that copiers are technically capable of preventing copying for counterfeit purposes. These elements can be printed in addition to the described marking and the surrounding area. In particular, the additional optical elements are a pattern which is recognized by a copier or scanner and results in that the copier does not make a copy or at least does not make a color copy or the scanned document can not be processed.

Zusammenfassend ist festzustellen, dass zur Unterscheidung eines Originals von einer Kopie keine weitere Ver- oder Bearbeitung der Schriftstücke notwendig ist. Es sind keine Hologramme oder Prägungen für das Original notwendig. Selbst das Vorsehen von Hologrammen oder Prägungen kann nicht sicherstellen, dass Kopie und Original voneinander unterschieden werden können. Wenn unbekannt ist, dass das Original diese Merkmale aufweist, und die Kopie diese Merkmale eben nicht mehr aufweist, kann nicht mit Sicherheit gesagt werden, dass es sich bei der Kopie um eine Kopie handelt. Mit dem erfindungsgemäßen Papier kann jedoch eine eindeutige Unterscheidung erfolgen.In summary, it should be noted that in order to distinguish between an original and a copy, no further processing or processing of the documents is necessary. There are no holograms or embossing necessary for the original. Even the provision of holograms or imprints can not ensure that copy and original can be distinguished from one another. If it is unknown that the original has these characteristics, and the copy just does not have these features, it can not be said with certainty that the copy is a copy. However, a clear distinction can be made with the paper according to the invention.

Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden detaillierten Beschreibung eines Ausführungsbeispiels der Erfindung, anhand der Figur der Zeichnung, die erfindungswesentliche Einzelheiten zeigt, sowie aus den Ansprüchen. Die dort gezeigten Merkmale sind nicht notwendig maßstäblich zu verstehen und derart dargestellt, dass die erfindungsgemäßen Besonderheiten deutlich sichtbar gemacht werden können. Die verschiedenen Merkmale können je einzeln für sich oder zu mehreren in beliebigen Kombinationen bei Varianten der Erfindung verwirklicht sein.Further features and advantages of the invention will become apparent from the following detailed description of an embodiment of the invention, with reference to the figure of the drawing, which shows essential to the invention, as well as from the claims. The features shown there are not necessarily to scale and presented in such a way that the features of the invention can be made clearly visible. The various features may be implemented individually for themselves or for a plurality of combinations in variants of the invention.

In der schematischen Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt und in der nachfolgenden Beschreibung näher erläutert.In the schematic drawing an embodiment of the invention is shown and explained in more detail in the following description.

Die einzige Figur zeigt ein Papier 1, auf welches eine Kennzeichnung 2 aufgedruckt ist. Die Kennzeichnung 2 ist durch aufgedruckte Rasterpunkte 3 gebildet. Der die Kennzeichnung umgebende Bereich 4 ist ebenfalls durch Rasterpunkte gebildet. Die Rasterpunkte des Bereichs 4 sind kleiner als die Rasterpunkte 3 der Kennzeichnung 2. Außerdem ist der Abstand zwischen den Rasterpunkten 3 größer als der Abstand zwischen den Punkten des Bereichs 4. Aus der Figur ergibt sich, dass das gesamte Papier mit Rasterpunkten bedruckt ist. Um die Erfindung zu verdeutlichen, sind alle Rasterpunkte hier sichtbar gemacht worden. Bei dem erfindungsgemäßen Papier sind die Rasterpunkte 3 der Kennzeichnung 2 so klein und mit einem solchen Abstand aufgedruckt, dass sie für das menschliche Auge so gut wie nicht sichtbar sind. Sie können jedoch durch ein Kopiergerät aufgelöst werden und erscheinen somit auf einer in einem Kopiergerät angefertigten Kopie des Papiers 1. Auch die Rasterpunkte des Bereichs 4 sind mit einer solchen Größe und mit einem Abstand aufgedruckt, dass sie für das menschliche Auge nicht sichtbar sind. Sie sind jedoch auch so klein aufgedruckt, dass sie durch ein Kopiergerät nicht aufgelöst werden können und somit nicht auf der Kopie des Papiers 1 erscheinen.The single figure shows a paper 1, on which a label 2 is printed. The marking 2 is formed by printed grid points 3. The area surrounding the marking area 4 is likewise formed by grid points. In addition, the distance between the grid points 3 is greater than the distance between the points of the area 4. The figure shows that the entire paper is printed with halftone dots. To illustrate the invention, all halftone dots have been made visible here. In the case of the paper according to the invention, the grid points 3 of the marking 2 are printed so small and at such a distance that they are virtually invisible to the human eye. However, they can be resolved by a copier and thus appear on a copy of the paper 1 made in a copier. Also, the halftone dots of the area 4 are printed in such a size and at a distance that they are invisible to the human eye. However, they are printed so small that they can not be resolved by a copier and thus do not appear on the copy of the paper 1.

Das Papier 1 kann zusätzlich ein individuelles Wasserzeichen 5 aufweisen. Das Wasserzeichen 5 wird ebenfalls nach der Papierherstellung in das Papier 1 eingebracht. Es kann entsprechend den Wünschen eines Kunden ausgestaltet sein.The paper 1 may additionally have an individual watermark 5. The watermark 5 is also introduced into the paper 1 after papermaking. It can be designed according to the wishes of a customer.

Claims (10)

Papier (1) mit einer aufgedruckten Kennzeichnung (2), die für das menschliche Auge zumindest weitestgehend unsichtbar ist und auf einer auf einem Kopiergerät erzeugten Kopie des Papiers (1) sichtbar ist.Paper (1) with a printed identification (2) which is at least largely invisible to the human eye and is visible on a copy of the paper (1) produced on a copier. Papier nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass eine Kennzeichnung (2) auf beiden Seiten des Papiers (1) aufgedruckt ist.Paper according to one of the preceding claims, characterized in that a marking (2) is printed on both sides of the paper (1). Papier nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Kennzeichnung (2) mittels Rasterpunkten (3) aufgedruckt ist.Paper according to one of the preceding claims, characterized in that the marking (2) by means of grid points (3) is printed. Papier nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der die Kennzeichnung (2) umgebende Bereich (4) mit Rasterpunkten bedruckt ist, die kleiner sind als die Rasterpunkte (3) der Kennzeichnung (2).Paper according to one of the preceding claims, characterized in that the area (4) surrounding the marking (2) is printed with screen dots which are smaller than the screen dots (3) of the marking (2). Papier nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das gesamte Papier (1) zumindest einseitig mit Rasterpunkten bedruckt ist.Paper according to one of the preceding claims, characterized in that the entire paper (1) is printed on at least one side with screen dots. Papier nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Verhältnis der Rasterpunktgröße zum Abstand zwischen zwei Rasterpunkten (3) für die Kennzeichnung (2) und den die Kennzeichnung (2) umgebenden Bereich (4) im Wesentlichen gleich ist.Paper according to one of the preceding claims, characterized in that the ratio of the dot size to the distance between two screen dots (3) for the tag (2) and the area (4) surrounding the tag (2) is substantially the same. Papier nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Rasterpunkte (3) der Kennzeichnung (2) und des umgebenden Bereichs (4) dieselbe optische Helligkeit aufweisen.Paper according to one of the preceding claims, characterized in that the grid points (3) of the marking (2) and of the surrounding area (4) have the same optical brightness. Papier nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Papier (1) ein Wasserzeichen (5) aufweist.Paper according to one of the preceding claims, characterized in that the paper (1) has a watermark (5). Papier nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Wasserzeichen (5) nach der Papierherstellung in das Papier eingebracht ist.Paper according to one of the preceding claims, characterized in that the watermark (5) is introduced into the paper after papermaking. Papier nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass ein Muster vorgesehen ist, das von einem Kopierer oder Scanner erkannt wird und dessen Erkennung dazu führt, dass zumindest keine Farbkopie angefertigt wird.Paper according to one of the preceding claims, characterized in that a pattern is provided which is recognized by a copier or scanner and whose recognition leads to the fact that at least no color copy is made.
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DE3419859A1 (en) 1983-05-31 1985-01-31 Hosokawa Printing Co. Ltd., Tokio/Tokyo Document protected against unauthorised reproduction
DE3424156C2 (en) 1983-10-07 1985-10-31 Bayropa Jung GmbH, 8857 Wertingen Paper with a grid print
DE2819640C2 (en) 1977-05-18 1986-04-17 Burroughs Corp., Detroit, Mich. Forgery-proof document and process for its production
US5171040A (en) * 1991-03-29 1992-12-15 Invisible Images, Inc. Copy-invalidating document
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Publication number Priority date Publication date Assignee Title
DE2819640C2 (en) 1977-05-18 1986-04-17 Burroughs Corp., Detroit, Mich. Forgery-proof document and process for its production
US4210346A (en) * 1977-06-23 1980-07-01 Burroughs Corporation Protected document bearing watermark and method of making
US4351547A (en) * 1979-10-11 1982-09-28 Burroughs Corporation Security document and method for making same using an alternating dot pattern
DE3419859A1 (en) 1983-05-31 1985-01-31 Hosokawa Printing Co. Ltd., Tokio/Tokyo Document protected against unauthorised reproduction
DE3424156C2 (en) 1983-10-07 1985-10-31 Bayropa Jung GmbH, 8857 Wertingen Paper with a grid print
US5171040A (en) * 1991-03-29 1992-12-15 Invisible Images, Inc. Copy-invalidating document
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US20050151990A1 (en) * 2003-11-06 2005-07-14 Masaaki Ishikawa Method, computer program, and apparatus for detecting specific information included in image data of original image with accuracy, and computer readable storing medium storing the program

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