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
  • 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
  • B42D25/328—Diffraction gratings; Holograms
• • 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
  • B42D25/346—Perforations
• • 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
  • B42D25/351—Translucent or partly translucent parts, e.g. windows
• • 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
  • B42D25/355—Security threads
• • 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
  • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
  • B42D25/364—Liquid crystals
• • 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
  • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
  • B42D25/373—Metallic materials
• • 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
  • B42D25/40—Manufacture
  • B42D25/405—Marking
  • B42D25/43—Marking by removal of material
  • B42D25/435—Marking by removal of material using electromagnetic radiation, e.g. laser
• • 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
  • B42D25/40—Manufacture
  • B42D25/405—Marking
  • B42D25/43—Marking by removal of material
  • B42D25/44—Marking by removal of material using mechanical means, e.g. engraving

Definitions

• the present invention relates to a secured sheet, especially for the production of a secure document.
• “Secure document” means a means of payment, such as a bank note, a check or a restaurant ticket, an identity document, such as an identity card, a visa, a passport or a passport. driver's license, a lottery ticket, a ticket or a ticket to cultural or sporting events.
• the invention relates more particularly, but not exclusively, to secured sheets intended for the production of banknotes.
• the watermark technique is widely used in the field of security papers and paper money in particular, which remains the first-level security of history, identifiable and identifiable by most ticket users, even the man in the street .
• WO2005 / 106118 It has already been proposed by the application WO2005 / 106118 to produce a secured sheet comprising a papermaking substrate provided with a watermark, with openings covered by a security film affixed to one side of the substrate. The openings are made outside the watermark, and visually complement the appearance of the latter.
• the security film may comprise de-metallizations participating in the overall observable pattern.
• US8465625 discloses an aperture made by papermaking, having an irregular edge with fibers protruding into the opening visibly to the naked eye. This opening can contribute to forming a global pattern by cooperating with a watermark arranged around it. The opening may be covered by a film attached to one side of the papermaking substrate. Achieving such an opening with an irregular edge is a complex papermaking operation to be mastered, which makes it relatively more difficult to obtain detailed, reproducible and aesthetic renderings.
• DE 102005022018 discloses a security document having two openings, one with a regular edge and the other with an irregular edge.
• the opening on regular board can be incorporated into a watermark.
• DE 102014016249 discloses a security document comprising a through aperture that can be combined with a security thread or a watermark, the aperture being laser cut.
• the invention aims to further improve the secured sheets, and in particular to provide security easily recognizable by the man and the street with many aesthetic possibilities, while being complex to reproduce for a counterfeiter.
• a security sheet comprising:
• the sheet being characterized in that said at least one opening extends inside the watermark, as delimited by its outer contour.
• inside the watermark is meant the connected surface delimited by a curve following the outermost contour of the watermark.
• a circular ring-shaped watermark will define a disk-shaped connected surface of outer diameter equal to that of the ring.
• the opening may extend inside the watermark and may or may not be superimposed on a watermarked area, i.e., the watermark itself.
• a watermarked area i.e., the watermark itself.
• the opening may be inside the watermark without being superimposed on it if the opening is a smaller diameter hole than that of the inner circle of the ring.
• the area of watering is the one whose thickness is different from the thickness of the vellum. This thickness may be less than that of vellum for a clear watermark, and superior for a dark watermark.
• the outline of the watermark is the pre-existing one before making the cut.
• the cutting can be done or not through a frozen area.
• the cut is made through a watermarked area, it means that part of the watermark is removed by the cutting operation.
• the watermark has a variable thickness of paper and the achievement of a regular edge cut in it requires a cutting tool performance, thus making it more difficult to counterfeit.
• the opening may have various surfaces, which may be less than 1 mm 2 or greater than 1 mm 2 , for example almost to the outer contour of the watermark in which it is made.
• regular edge it is necessary to understand an edge without long free fibers projecting visibly to the naked eye in the opening, unlike the opening obtained by papermaking disclosed in US8465625 cited above.
• the regular edge is preferably an edge obtained by laser cutting, and this edge may be straight, curved, corrugated or indented, the corrugations or teeth being cutting.
• a security sheet comprising:
• At least one representation of a reference pattern in particular in the form of an impression, a metallization / de-metallization or a hologram,
• At least one aperture with a regular edge made by ablation of the papermaking substrate this opening completing the watermark and reproducing with it the appearance and / or the meaning of the reference pattern when the sheet is observed in transmitted light
• at least one security film at least partially transparent or translucent, this film being superimposed at least in part on the opening.
• the secure document is a bank note.
• the security film comprises a plastic support.
• the area of the sheet where the opening is superimposed on the security film is called
• the invention makes it possible to further secure the document with respect to the risks of counterfeiting by proposing a combination making it possible to synchronously observe the watermark and the security film united, either in the light transmitted, either in reflected light.
• the security element may have, in the area of the opening, front and back faces of different aspects. This may include a difference in brightness, contrast, color and / or hue, dimensional patterns, contour and / or different content, and / or different patterns. This difference in appearance is observable in transmitted or reflected light, preferably in reflected light. It is then observable according to at least one angle of observation given on the front and at least one angle of observation given on the back. It can be observable according to at least one illumination, especially in visible light, UV or IR, illuminating the front and at least one illumination, especially in visible light, UV or IR, illuminating the back.
• the front and back faces have different patterns. In this way, the observation can be done in a differentiated way by an asymmetry of appearance on the front and back.
• This combination advantageously makes it possible to overcome the lack of visibility of the window when the associated patterns are too heavily loaded, especially by printing, to be immediately identifiable by the man in the street. It is customary not to overload the print at the watermark, and in particular to deprive the printed area of the print.
• the optical effect present in the window can be united, with "CLEARTEXT" effects visible in transmitted light, and present in reflected light patterns and / or optical effects and / or different colors on each of the faces.
• the security film may advantageously leave at the opening a transparent surface free of visible optical effect.
• the extent of the watermark as delimited by its outer contour may be greater by a factor at least equal to 1.1 to the extent of said at least one opening, better still at least 1.5, more preferably a factor of at least 10 or 20.
• the opening may be small in size, and in particular be a micro-perforation.
• micro-perforation means an opening whose extent is less than or equal to 1 mm 2 .
• Said at least one opening may be disposed in the center of the watermark or elsewhere.
• a central layout can further enhance safety, requiring precise positioning.
• the aperture is positioned relative to a nominal position on the secure document with an accuracy better than +/- 3 mm in the machine direction SM (i.e. in the direction of travel of the substrate in the paper machine) and in the transverse direction ST.
• the measured difference between the expected position of the opening with respect to the watermark and the observed position is measured, and it is checked whether this difference satisfies a predefined statistical law. If so, this may be a further indication of the authenticity of the document.
• the security film preferably comprises at least one security element superimposed at least partially on the opening.
• the security film completely covers the opening.
• the security element may or may not completely cover the opening.
• the security element may be an optically variable device, especially a diffractive device.
• the outline of the security element may be homothetic to that of the opening, or alternatively may be any. A homothetic contour can further enhance safety, being more difficult to achieve. It can also make it easier to detect a bad positioning of the security element with respect to the contour of the opening.
• the security film and the security element can completely cover the aperture, notably being greater than 5 to 20% larger than the extent of the aperture.
• the security element can be optically variable in the area of the opening.
• an optically variable device or OVD for optically variable device in English
• a lenticular, Moire, diffractive security element in particular of the first order (laser hologram, 3D hologram, echelette network or blazed grating in English) or of zero order, or such that a thin film interferential structure, especially monolayer or multilayer structure (Bragg structures, volume holograms, liquid crystals, etc.).
• a thin film interferential structure especially monolayer or multilayer structure (Bragg structures, volume holograms, liquid crystals, etc.).
• Such a device produces different visual effects, when the angle of observation or illumination varies.
• the security element may be a diffractive structure, and in particular a DOE digital hologram diffractive optical element such as described in application WO 2014/119296 on page 5.
• a diffractive optical element When such an optical element is illuminated, in particular by a beam collimated, it generates an interference pattern producing an image in a viewing plane, which is visible on a surface positioned in this plane, or visible in transmission from this plane.
• Such a diffractive optical element is computer generated, being different from so-called rainbow, Fresnel or volume reflection holograms.
• the security element may have, in the area of the opening, a metal layer and at least one recess therein.
• the outline of the at least one opening may be substantially homothetic to that of the watermark.
• the outline of said at least one aperture may be homothetic of a watermark pattern.
• the watermark may be screened and / or shaded, or other, for example electrotype.
• the film completely covers said at least one opening.
• the film may extend in strip from one edge to the opposite edge of the sheet.
• the film is applied in the form of a patch in excess of the opening, which can also be superimposed on the watermark.
• the film is a patch, it extends back at least three edges of the document, when the latter is rectangular, better extends back from all edges of the document.
• the width of the film may be smaller than that of the watermark.
• the outline of the at least one opening may be reproduced elsewhere on the sheet or on the security element. This increases security, making it more difficult to replicate the secured sheet.
• Said at least one window may extend in contact with an infiltrated zone of thickness different from the vellum thickness of the sheet, in particular an area of smaller thickness. This can minimize the creation of extra thicknesses.
• the watermark may be without center of symmetry.
• the subject of the invention is also a method for manufacturing a secured sheet, comprising the steps of producing a sheet of watermarked paper having at least one watermark, cutting at least one opening in this watermark and sealing at least partially, better fully, said opening by a security film also covering the watermark.
• the opening is preferably made using a laser, but alternatively it can be done with a punch.
• the method may comprise an optical acquisition of the watermark area, and a real-time control of the laser according to this acquisition, so as to direct the laser by taking as a reference the watermark, to guarantee a predefined positioning of the opening within the watermark. This makes it possible to keep the appearance of the combined pattern formed by the watermark and the opening substantially constant, while taking into account the positioning dispersion of the watermark within the sheet resulting from the paper process.
• the reference pattern may be present on the security film, in particular in the form of an impression, a metallization or a de-metallization, and preferably in the form of a partial de-metallization after metallization (hereinafter "metallization / de-metallization").
• the watermark may comprise several repeating elementary patterns and said at least one opening may have the same contour as one of said elementary patterns.
• the watermark can be of any type, being for example a shaded and / or rasterized watermark.
• the reference pattern can be alphanumeric.
• the watermark may be an electrotype watermark.
• the film can be superimposed at least partially on the watermark.
• the film may extend outside the watermark.
• the watermark can be sandwiched between two films attached on either side of it, on the front and back sides of the paperboard substrate. These films may or may not cover the same surface of the papermaking substrate, and may be superimposed exactly or not. Where appropriate, at least one of these films covers the entire surface of the paperboard substrate. In one example, each of these films covers the entire surface of the papermaking substrate.
• the invention further relates, in another of its aspects, a secure document, including a bank note, comprising a secured sheet according to the invention, as defined above.
• the secured sheet, or the document obtained from it, including the banknote, may include one or more additional security elements as defined below.
• These additional security features some are detectable to the eye, daylight or artificial light, without the use of a particular device.
• These security elements comprise for example colored fibers or boards, fully or partially printed or metallized wires. These security elements are called first level.
• Additional security elements are detectable only with a relatively simple apparatus, such as a lamp emitting in the ultraviolet (UV) or infrared (IR).
• These security elements comprise, for example, fibers, boards, strips, wires or particles. These security elements may be visible to the naked eye or not, being for example luminescent under a lighting of a Wood lamp emitting in a wavelength of 365 nm. These security elements are said to be second level.
• Other types of additional security elements require for their detection a more sophisticated detection device. These security elements are for example capable of generating a specific signal when they are subjected, simultaneously or not, to one or more external excitation sources. The automatic detection of the signal makes it possible to authenticate, if necessary, the document.
• These security elements comprise, for example, tracers in the form of active materials, particles or fibers capable of generating a specific signal when these tracers are subjected to optronic, electrical, magnetic or electromagnetic excitation. These security elements are said to be third level.
• the additional security element (s) present on and / or within the secured sheet, in particular the security film and / or the paperboard substrate, may have first, second or third level security features.
• the subject of the invention is also a method for authenticating a secured sheet or a secure document, as defined above, in which at least one face of the sheet is observed. in reflected light and transmitted light, and information about the authenticity of the document is generated from this observation.
• FIG. 1 represents an example of a secure document according to the invention, observed on the back side,
• FIG. 2 represents the document of FIG. 1, seen on the front side
• FIG. 3A represents the watermark of the document of FIGS. 1 and 2 during the production of the secured sheet, before making the openings
• FIG. 3B represents the watermark of FIG. 3A after making the openings
• FIGS. 4A to 4C illustrate different stages of the production of a variant of secured sheet according to the invention
• FIGS. 5 and 6 represent a variant of secure document, observed respectively on the back and front side
• FIGS. 7A and 7B illustrate different stages of the production of the sheet of the document according to FIGS. 5 and 6,
• FIG. 8 represents another example of a document according to the invention.
• FIGS. 9A to 9D respectively represent a secure document according to an alternative embodiment of the invention, observed respectively on the back side in reflection, on the front side in reflection, on the backside in transmission and on the front side in transmission.
• FIGS. 1 and 2 show a first example of a secure document 1 produced in accordance with the invention.
• This document 1 is for example a banknote, and may have a rectangular shape.
• Document 1 comprises a papermaking substrate 10 having a watermark 11, which may be of any type.
• This watermark 11 is shown in isolation in FIG. 3A, in the aspect that it can take after the manufacture of the paperboard substrate 10.
• the document 1 comprises at least one opening 12 made in the substrate 11.
• This opening 12 is preferably made by cutting with a laser, which allows to obtain a cut with a regular edge.
• two openings 12 each star-shaped are thus formed through the watermark 11, during the manufacture of the document 1, as shown in Figure 3B.
• openings 12 are set back from the outer contour 13 of the watermark 11, being for example at a minimum distance d from this non-zero contour, for example greater than or equal to 3 mm.
• the laser cutting installation may comprise an optical device for marking the watermark on the paperboard substrate, so as to use this watermark as a spatial reference for the realization of the opening (s).
• the optical device comprises for example at least one camera filming the sheet and a computer for analyzing the image and recognizing the watermark. Then, the computer can control the laser to make the aperture (s) in a predefined area of the watermark.
• the secure document 1 also comprises at least one film 15 attached to the paperboard substrate 10.
• This film 15 may be, as illustrated, in the form of a strip extending from one edge of the document on the opposite side.
• the film 15 may comprise a support of thermoplastic material, such as PET for example.
• the support material is transparent.
• the film 15 carries at least one security element 20, in the form of at least one pattern formed by a metallization / de-metallization for example or alternatively by printing.
• the film 15 comprises two security elements 20 each in the form of a star made by metallization / de-metallization.
• the pattern of the security element 20 may correspond to the shape of the opening, for example to a near homothety.
• the security element may have a size greater than that of the opening 12 to which it is superimposed.
• the security element 20 continues to completely close the opening, as illustrated.
• the film 15 comprises a transparent region 21 in which the security element or elements 20 are made, the film 15 being metallized, or alternatively printed, outside this region 21 in zones 22 not superimposed on the watermark 11.
• the zone 21 is for example formed by de-metallization of a metal layer deposited on the film 15, for example by vacuum metallization or galvanic deposition. In a variant, the zone 21 can be obtained by printing. Both techniques can also coexist within the same film 15.
• the film 15 is fixed on the papermaking substrate by an adhesive, heat-activatable for example. It is for example applied by hot transfer.
• the film 15 is fixed after the openings 12 have been made.
• the film 15 may have a width sufficient to allow it to completely cover the openings 12, as illustrated.
• the minimum distance k between the edge of a opening and the edge of the film 15 is preferably non-zero, in particular to ensure a solidity to the assembly, and for example greater than or equal to 3 mm.
• the width of the film 15 is for example 5 to 20 mm.
• the film 15 at least partially covers the watermark.
• the overlap is partial, the watermark overflowing on each side of the film 15.
• the film 15 it is useful for the film 15 to retain a certain transparency in its region 21 which is superimposed on the watermark 11, so as not to affect the visibility of the latter in transmitted light.
• the film may comprise a first level security element as just described, formed by printing or by metallization / de-metallization.
• the security element is diffractive, for example being produced so as to produce an image when illuminated by a light beam such as a laser beam.
• the film comprises a security element superimposed on the opening which is a second level security.
• the security elements 20 can be seen through the openings 12.
• the zones 22 of the film 15 are masked by the papermaking substrate.
• Watermark 11 is faintly visible. In transmitted light, the watermark 11 becomes more visible.
• the secured document 1 When the secured document 1 is observed in reflected light on the front side, it can be seen as illustrated in FIG. 2 the zones 22 of the film 15 as well as the security elements 20. The openings 12 are masked by the security elements 20.
• the watermark It is weakly visible, but becomes more visible in transmitted light.
• the secure document 1 comprises a second film which covers the paperboard substrate on the opposite side to the film 15. This may make it possible to improve the protection of the openings 12.
• FIGS. 4A to 4C show different stages of the manufacture of a secure document variant 1.
• a watermark 11 is seen made in the papermaking substrate 10 of the document.
• This watermark 11 is for example formed by the juxtaposition of a screened watermark 1a and a shaded watermark 1 lb.
• FIG. 4B illustrates the making of an opening 12 within this watermark 11, away from the edges of the watermark 1a.
• a security film 15 is attached to the papermaking substrate 10, as shown in FIG. 4C.
• This film 15 comprises a security element 20 which is positioned on the document so as to be superimposed with the opening 12 and at a distance from the edge thereof, so as to provide a margin 24 as illustrated.
• the security element 20 may have a pattern formed by metallization / metallization or by printing, or even by a combination of these two techniques, the outline of which has a link with that of the opening 12, for example it is homothetic as illustrated.
• the security element 20 may have a text appearing in negative writing, for example letters as illustrated.
• the film 15 may have a transparent region 21 whose contour 26 matches that of the watermark 11, for example by providing a gap 27.
• the transparent region 21 is for example formed by de-metallizing the film 15.
• the zones 22 of the film 15 located on either side of the transparent region 21 may be opaque, being for example metallized, and may have patterns 29 in negative writing, for example the letters of the word "africa" in the illustrated example.
• FIGS. 5 and 6 show a variant of secure document 1 comprising a watermark 11 in the shape of a flower.
• This watermark 11 is shown in isolation in FIG. 7A.
• the document 1 comprises an opening 12, for example in the form of a hexagon, made in the central part of the watermark 11, as illustrated in FIG. 7B.
• This opening 12 is preferably made by laser cutting, like the previous examples.
• the document 1 comprises a security film 15, which has, as illustrated in FIG. 6, a transparent region 21 with a security element 20 formed, for example, by printing or by metallization / de-metallization of the film 15.
• This security element 20 for example, has a homothetic contour of that of the opening 12, preferably being of larger dimensions.
• the security element 20 advantageously completes, aesthetically and conceptually, the watermark 11, as can be seen in FIG. 6.
• FIG. 8 shows a secure document 1 comprising an electrotype watermark 11, representing an alphanumeric pattern for example, for example the term "security” and an opening 12 made by laser, completing the watermark 11 pattern, for example the letter " AT ".
• the watermark 11 and the opening 12 entirely reproduce a reference sign 60 which appears elsewhere on the document 1, in this case "A security”.
• a security film 15 is laminated on the papermaking substrate 10 and covers the opening 12.
• This film 15 can bring various optical effects to the document, such as a holographic, iridescent, metallic effect, etc. Simultaneously, the pattern of the opening 12 can appear with the effect provided by the security film 15.
• FIGS. 9A to 9D Another example of a secure document 1 made in accordance with one aspect of the invention will now be described with reference to FIGS. 9A to 9D.
• This document 1 comprises a paperboard substrate 10 provided with a watermark 11 which represents for example a frangipani flower and a butterfly.
• An opening 12 is made through the watermark 11, preferably by laser cutting. This opening 12 completes or matches the outline of a part of the pre-existing watermark 11, in this case a petal of the flower.
• the document 1 comprises a security film 15 which covers the watermark 11.
• This film 15 comprises a transparent region 21 whose contours substantially follow the shape of the watermark 11, except in the opening 12 where the edge 30 of the transparent region may present , as illustrated, a shape that follows that of an opposite edge 31 of the opening 12, thus providing a transparent window 32 through the opening 12 between the edge 30 and the edge 31.
• the film 15 may be narrower than the watermark 11 but wider than the aperture 12, as illustrated, completely covering it.
• This reference pattern 35 may be made by de-metallizing a region metallized film 15 or by negative printing on the film 15.
• Another pattern 40 reproducing for example identically or conceptually another part of the watermark, in this case the butterfly, can be reproduced elsewhere on the security film, for example by de-metallization also, for example opposite side of the reference pattern 35 with respect to the watermark 11.
• de-metallization also, for example opposite side of the reference pattern 35 with respect to the watermark 11.
• FIG. 9A the document 1 in reflection on the back. Watermark 11 is faintly visible.
• the film 15 is masked by the papermaking substrate 10.
• the region 22 of the film 15, for example metallized is visible through the opening 12.
• the watermark 11 becomes clearly visible, as are the text or other negative-writing patterns 35 and 40 made by de-metallizing the film 15.
• the transparent window 32 becomes very bright.
• the watermark 11 is faintly visible, as is the window 32.
• the film 15 is perfectly visible, and may have, for example, a metallic reflection effect, diffractive elements or a color varies depending on the angle of observation or illumination.
• the window 32 becomes perfectly visible, as well as the watermark 11 and the text and other patterns 35 and 40 in negative writing.
• the security film is superimposed on at least one of these micro-perforations and has in the superposition zone a diffractive security element, allowing a beam of light, in particular laser light, to be sent through the opening to generate by projection an image.
• a diffractive security element is described in application WO2014 / 199296.
• the security film is transparent in its area which is superimposed on the micro-perforation.
• the security film may further comprise a diffractive element which is superimposed on a larger aperture of the papermaking substrate.
• the security film may have various security features, which may or may not have the same appearance on the front and back sides of the film.
• the security film has metallizations of different colors on its front and back sides.
• the security film may have microreliefs made for example by embossing the plastic support of the film, and these microreliefs may be metallized if necessary.
• the security film may be in the form of a patch or alternatively a film completely covering one side of the papermaking substrate.
• Two plastic films at least one of which is a security film, can cover the substrate on both sides and sandwich the aperture (s) made through the papermaking substrate. Where appropriate, these two films cover the entire surface of each face of the sheet.
• the aperture can be given any shape, in particular polygonal, non-polygonal, alphanumeric, reproducing the shape of a watermark motif or a pattern appearing elsewhere on the document or security film, for example a pattern printed on the paperboard substrate.
• the outline of the opening can reproduce the shape of a country.
• the invention makes it possible to gather in the same limited area of the document various security features, by the presence of the watermark, the opening and the security film, leaving more room on the document for security printing and other security elements. associates.
• the security film may comprise a lenticular network.
• This network may include micro lenses cooperating with micro-motives to form an image whose appearance varies with the direction of observation.
• the lenticular network may or may not be present in the area of the film superimposed on the opening.
• the lenticular array is present on the film both in an area superimposed on the aperture and elsewhere; alternatively, the lenticular array is present only in the area of the aperture, and the associated effect can be observed through the aperture.
• the zone or regions of the film carrying the lenticular network may complete the watermark pattern.

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• Engineering & Computer Science (AREA)
• Manufacturing & Machinery (AREA)
• General Health & Medical Sciences (AREA)
• Physics & Mathematics (AREA)
• Optics & Photonics (AREA)
• Toxicology (AREA)
• Electromagnetism (AREA)
• Health & Medical Sciences (AREA)
• Mechanical Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Crystallography & Structural Chemistry (AREA)
• Credit Cards Or The Like (AREA)
• Diffracting Gratings Or Hologram Optical Elements (AREA)
• Holo Graphy (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

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• 2018
  • 2018-04-23 FR FR1853542A patent/FR3080324B1/fr active Active
• 2019
  • 2019-04-17 US US17/048,796 patent/US11491815B2/en active Active
  • 2019-04-17 WO PCT/EP2019/059912 patent/WO2019206760A1/fr active Application Filing
  • 2019-04-17 KR KR1020207031854A patent/KR20210005615A/ko not_active Application Discontinuation
  • 2019-04-17 EP EP19717325.5A patent/EP3784498A1/fr active Pending
  • 2019-04-17 BR BR112020021374-8A patent/BR112020021374A2/pt unknown
  • 2019-04-17 JP JP2020560324A patent/JP2021522087A/ja active Pending
  • 2019-04-17 CN CN201980027581.9A patent/CN112074416B/zh active Active

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