EP2008834A1 - Object with optical effect - Google Patents

Object with optical effect Download PDF

Info

Publication number
EP2008834A1
EP2008834A1 EP07405181A EP07405181A EP2008834A1 EP 2008834 A1 EP2008834 A1 EP 2008834A1 EP 07405181 A EP07405181 A EP 07405181A EP 07405181 A EP07405181 A EP 07405181A EP 2008834 A1 EP2008834 A1 EP 2008834A1
Authority
EP
European Patent Office
Prior art keywords
raster
pattern
surface area
optical effect
image pattern
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.)
Withdrawn
Application number
EP07405181A
Other languages
German (de)
French (fr)
Inventor
Markus Lüthi
Misha Weik
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.)
3A Technology and Management AG
Original Assignee
3A Technology and Management AG
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 3A Technology and Management AG filed Critical 3A Technology and Management AG
Priority to EP07405181A priority Critical patent/EP2008834A1/en
Publication of EP2008834A1 publication Critical patent/EP2008834A1/en
Application status is Withdrawn legal-status Critical

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B42BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42DBOOKS; 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
    • B42D25/00Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30Identification or security features, e.g. for preventing forgery
    • B42D25/342Moiré effects
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B42BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42DBOOKS; 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
    • B42D25/00Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30Identification or security features, e.g. for preventing forgery
    • B42D25/36Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/378Special inks
    • B42D25/387Special inks absorbing or reflecting ultra-violet light
    • GPHYSICS
    • G07CHECKING-DEVICES
    • G07DHANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/20Testing patterns thereon
    • G07D7/202Testing patterns thereon using pattern matching
    • G07D7/207Matching patterns that are created by the interaction of two or more layers, e.g. moiré patterns
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B42BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42DBOOKS; 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
    • B42D2035/00Nature or shape of the markings provided on identity, credit, cheque or like information-bearing cards
    • B42D2035/12Shape of the markings
    • B42D2035/14Dot or raster patterns
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B42BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42DBOOKS; 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
    • B42D2035/00Nature or shape of the markings provided on identity, credit, cheque or like information-bearing cards
    • B42D2035/12Shape of the markings
    • B42D2035/16Bars or lines

Abstract

In the case of an article having a surface area which generates an optical effect to increase the security against forgery, the surface area with the optical effect contains an image pattern in the form of a first raster with additional information which becomes visible only after decoding with a second raster. The dimensions of the first raster and the dimensions of the second raster are matched to one another such that the two rasters show moiré interference, the second raster being arranged on a test film intended to be placed on the surface area with the optical effect. The image pattern with the first grid containing the additional information and the second grid are only visible in the UV light color print pattern.

Description

  • The invention relates to an article with a surface area which generates an optical effect in order to increase the security against forgery.
  • The forgery-proof packaging is of great importance especially for the pharmaceutical industry. In principle, however, there is also a desire in other areas for forgery-proof packaging or products, in particular in the consumer goods industry, for example in the packaging of foods, cosmetic articles, clothing, software and music CDs or securities. The article having the optical effect-generating surface region may be a packaging, a packaging material, a packaging aid or a product itself, on which a surface area in the form of a security part, for example as a label, is provided with an optical effect.
  • A tamper evident packaging or packaging aid may serve as a tamper evidence guarantee that allows the customer to recognize that the product he has purchased has actually been manufactured and packaged by the desired producer. A tamper-resistant packaging aid can also be used, among other things, as a first-opening guarantee, for example in the form of a label, a banderole or a sealing strip, etc., for example over a bottle cap or over the closure of a wide-necked glass, over the seam between a lid and a container or over the zipper of a bag. When opening the appropriate packaging, the label, the banderole or the sealing strip is destroyed, indicating that an initial opening has already taken place. It is also possible; To fill or wrap objects in an outer packaging, with the outer packaging has characteristic distinctive and non-duplicable features which show that the packaging of the contents has been done at a particular supplier.
  • Known anti-counterfeiting packaging and products are provided with holograms on their surface or have color codings or invisible features. In order to achieve a high security against counterfeiting u.a. Holograms proven. Examples are hologram labels or lidding films with integrated holograms. The production of individualized holograms is, however, associated with an enormous effort.
  • The US-A-4,662,653 discloses an article having a surface area comprising a transparent layer of material having an image pattern which is bounded on one side by a specular layer. The mirror image of the image pattern forms a second image pattern, the distance between these image patterns being determined by the thickness of the material layer. When the viewing angle changes, there is a change in the visual perception of the overall image generated by the superposition of the image patterns. The distances between the individual pixels or between the image pattern and the reflection layer are dimensioned so that the visual appearance is based on a light diffraction.
  • Also the US-A-4,632,430 discloses articles having a surface area producing an optical effect wherein two image patterns are spaced apart by a transparent layer of material and the optical perception of the overall image produced by the superposition of the image patterns changes as the viewing angle changes. This effect, which results only in translucent light, is based on a simple overlay of the shadow areas of the two image patterns.
  • One from the EP-A-0 348 583 known object includes a base surface with a line pattern. A transparent film is with a second line pattern Mistake. The transparent film having the second line pattern is partially fixed to the base surface, so that the distance between the base surface and the transparent film varies with different degrees of movement of the object. Under certain distance conditions, a kind of "dynamic" moire pattern results for the viewer.
  • In the WO 97/19820 there is disclosed an article exhibiting on its surface an optical effect resulting from the arrangement of two image patterns separated by a transparent layer of material. The diffraction patterns produced by light diffraction on a microscopic raster image lead to moiré interference due to superimposition.
  • From the WO-A-98/15418 For example, there is known a paper which, when folded, has a surface area with an optical effect due to moiré interference. The two image patterns are each applied to a transparent film, the two image patterns have no fixed distance from each other, but one image pattern is arranged detached from the other. The optical effect therefore only occurs when the two image patterns are placed on each other during the folding of the paper.
  • From the DE-A-31 20 653 are known as moire strain gauges. The two image patterns (screen films) are not kept at a fixed distance from each other, but arranged separately from each other.
  • The EP-A-1 089 883 discloses an article having a surface area producing an optical effect to increase anti-counterfeiting security, wherein the surface area having the optical effect has at least two image patterns spaced by a transparent layer of material, and the optical perception of the overall image created by the superposition of the image patterns is changed as the viewing angle changes wherein the distance between the image patterns defined by a thickness of the transparent material layer and the distance between adjacent The image patterns underlying the image patterns are coordinated so that the image patterns show moire interference.
  • From the EP-A-1 767 381 is one with the object according to the EP-A-1 089 883 However, the second image pattern is virtually hidden by holographic coding at an apparent distance from the first image pattern.
  • The invention is based on the object of equipping at least a part of the surface of objects such as packaging, packaging materials, packaging aids or products themselves with an optical effect not recognizable in the visible light as a security feature against counterfeiting.
  • For the inventive solution of the problem results in an article of the type mentioned that the surface area with the optical effect, an image pattern in the form of a first grid with additional information that will be visible only after decoding with a second grid contains, the dimensions of first raster and the dimensions of the second raster are coordinated so that the two rasters show moire interference, wherein the second raster is arranged on a test film intended to be placed on the surface area with the optical effect, and wherein the image pattern with the additional Information containing first grid and the second grid are only visible in UV light color print pattern.
  • Preferred raster elements are lines, grids, polygons, in particular 3-, 4- and 6-cornered polygons as well as round and oval points.
  • Preferably, the second raster is a uniform line pattern and the first raster of the first image pattern is a pattern matched to the uniform line pattern of the second raster.
  • For example, the first image pattern may be printed on the surface of a sheet-like material.
  • The film-shaped material may, for. Example, an opaque film, in particular an aluminum foil, and the test film is a transparent plastic film, or vice versa, or the film-shaped material and the test film are both transparent plastic films.
  • In order to produce the effect according to the invention, the distances known from the moiré patterns between adjacent raster elements must be observed. The image patterns may, for example, consist of individual parallel lines, be punctiform or contain a combination of straight and curved lines or other grids.
  • In the simplest case, the second raster on the test film, also called "lens", is a uniform line pattern of individual parallel lines with equal spacing between adjacent lines, and the first raster of the image pattern applied to the surface of the article is matched to the second raster , by patterning additional information contained in the lines pattern. The coding arises from the fact that a shift of the picture elements is carried out at points which are supposed to stand out in contrast during the detection. It can thus z. As brand names and the like. Sign brand names and the like. Signs that are visible only after placing the test film in UV light, are installed in the packaging material.
  • The amount of displacement of the picture elements can be optionally controlled so that contrast intermediate values are achieved, ie, for. B. also a sound stage image can be generated.
  • If lines are used as raster elements, the moiré effect can also be achieved with lenticular lenses. In this case, there is no interference, but the lenticular lens makes parts of the first image pattern hidden, so that either only the unchanged or the changed areas are seen. The effect is the same in itself. The groove spacing of the lenticular lenses must be matched to the line frequency of the first image pattern.
  • Of course, the screens may also contain a combination of straight and curved lines or other picture elements.
  • A preferred field of application of the inventive article are packaging materials, such. As cover sheets of blister packs, but also cartons, glass bottles and bags for medicines.

Claims (6)

  1. An article having a surface area producing an optical effect to enhance anti-counterfeiting security, the surface area having the optical effect comprising an image pattern in the form of a first raster with additional information that becomes visible only after decoding with a second raster, the dimensions of the first Rasters and the dimensions of the second raster are coordinated so that the two rasters show moire interference, wherein the second raster is arranged on a test film intended to be placed on the surface area with the optical effect, and wherein the image pattern with the the additional information containing first grid and the second grid are only visible in UV light color print pattern.
  2. The article of claim 1, characterized in that the second raster is a uniform line pattern and the first raster of the image pattern is a pattern matched to the uniform line pattern of the second raster.
  3. An article according to claim 1 or 2, characterized in that the image pattern is printed on the surface of a film-shaped material.
  4. An article according to claim 3, characterized in that the film-shaped material is an opaque film, in particular an aluminum foil, or a transparent plastic film and the test film is a transparent plastic film.
  5. An article according to claim 1, characterized in that the first raster of the image pattern includes a uniform line pattern, and that instead of the test film a lenticular lens having a groove spacing matched to the uniform line pattern of the image pattern is used,
  6. Use of an article according to one of the preceding claims as packaging material with a tamper-proof surface area.
EP07405181A 2007-06-25 2007-06-25 Object with optical effect Withdrawn EP2008834A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07405181A EP2008834A1 (en) 2007-06-25 2007-06-25 Object with optical effect

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07405181A EP2008834A1 (en) 2007-06-25 2007-06-25 Object with optical effect

Publications (1)

Publication Number Publication Date
EP2008834A1 true EP2008834A1 (en) 2008-12-31

Family

ID=38705078

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07405181A Withdrawn EP2008834A1 (en) 2007-06-25 2007-06-25 Object with optical effect

Country Status (1)

Country Link
EP (1) EP2008834A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6273473B1 (en) * 1996-10-10 2001-08-14 Securency Pty Ltd Self-verifying security documents
WO2003095221A2 (en) * 2002-05-14 2003-11-20 Oesterreichische Banknoten- Und Sicherheitsdruck Gmbh Security document with an optical security area
US20040076310A1 (en) * 2002-10-16 2004-04-22 Hersch Roger D. Authentication of documents and articles by moire patterns
WO2006131813A1 (en) * 2005-06-06 2006-12-14 Melexis Nv Monitoring device for a rotatable shaft

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6273473B1 (en) * 1996-10-10 2001-08-14 Securency Pty Ltd Self-verifying security documents
WO2003095221A2 (en) * 2002-05-14 2003-11-20 Oesterreichische Banknoten- Und Sicherheitsdruck Gmbh Security document with an optical security area
US20040076310A1 (en) * 2002-10-16 2004-04-22 Hersch Roger D. Authentication of documents and articles by moire patterns
WO2006131813A1 (en) * 2005-06-06 2006-12-14 Melexis Nv Monitoring device for a rotatable shaft

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RAP1 Transfer of rights of an ep published application

Owner name: 3A TECHNOLOGY & MANAGEMENT AG

18D Deemed to be withdrawn

Effective date: 20091211