IDENTIFICATION DOCUMENT WITH SEVERAL VISUAL MARKINGS AND METHOD FOR MANUFACTURING THEREOF

Abstract

The invention concerns a method for manufacturing an identification document comprising a body with a first visual marking and a second visual marking, the first and the second visual markings depicting same identification data. The method comprises the following steps of: engraving a first area of the identification document with a first laser beam for obtaining the first visual marking; providing at least one see-through portion in a second area of the identification document; providing an optically variable printing ink patch, laminated to at least one first transparent layer located in the see-through portion; and engraving the surface of the laminated optically variable printing ink patch with a second laser beam for obtaining the second visual marking, said second laser beam having a lower power than the first laser beam.

The invention concerns also the identification document obtained by this method.

Claims

1. A method for manufacturing an identification document comprising a body with a first visual marking, comprising: providing at least one see-through portion in a first area of the identification document; said see-through portion comprising openings through the body of the identification document wherein only transparent layers cross over the openings, providing an optically variable printing ink patch positioned in register with the openings of the see-through portion and laminated to at least one first transparent layer; and engraving the surface of the laminated optically variable printing ink patch through the see-through portion with a first laser beam for obtaining the first visual marking, said first laser beam having a power determined so that the laser beam does not fully penetrate the ink layer so that only the surface of the ink pigments is modified.

2. The method for manufacturing an identification document according claim 1, wherein the body comprises a second visual marking, the first and the second visual markings depicting same identification data, further comprising: engraving a second area of the identification document with a second laser beam for obtaining the second visual marking; said first laser beam having a lower power than the second laser beam.

3. The method according to claim 1, wherein the second visual marking is personalized as a positive picture and the first visual marking is personalized as a negative picture of the same identification data.

4. The method according to claim 1, wherein the optically variable printing ink patch is laminated between the first transparent layer and a second transparent layer.

5. The method according to claim 4, wherein the laminated optically variable printing ink patch comprises a first side in which the first visual marking is engraved and a second side in which a third marking is engraved through the see-through portion with the first laser beam.

6. The method according to claim 5, wherein the third marking is a personalized marking different from the first and the second visual markings.

7. An identification document comprising a body with a first visual marking: providing at least one see-through portion in a first area of the identification document; said see-through portion comprising openings through the body of the identification document wherein only transparent layers cross over the openings, providing an optically variable printing ink patch positioned in register with the openings of the see-through portion and laminated to at least one first transparent layer; and engraving the surface of the laminated optically variable printing ink patch through the see-through portion with a first laser beam for obtaining the first visual marking, said first laser beam having a power determined so that the laser beam does not fully penetrate the ink layer so that only the surface of the ink pigments is modified.

8. The identification document according claim 7 wherein the body comprises a second visual marking, the first and the second visual markings depicting same identification data.

9. The identification document according to claim 7, wherein the second visual marking is a positive picture and the first visual marking is a negative picture of the same identification data.

10. The identification document according to claim 7, wherein it comprises: a second area in which the second visual marking is engraved with a second laser beam; and a first area comprising an optically variable printing ink patch, positioned in register with openings of a see-through portion of the identification document and laminated to at least one first transparent layer; wherein only transparent layers cross over the openings of the see-through portion, the first visual marking being engraved at the surface of the optically variable printing ink patch through the see-through portion with a first laser beam, wherein said first laser beam having a lower power than the second laser beam.

11. The identification document according to claim 10, wherein the optically variable printing ink patch is laminated between the first transparent layer and a second transparent layer and comprises a first side in which the first visual marking is engraved and a second side in which a third marking is engraved.

12. The identification document according to claim 11, wherein the third marking is a personalized marking different from the first and the second visual markings.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0040] A detailed description of some preferred embodiments is set forth herein below with reference to the following drawings, in which:

[0041] FIGS. 1A-1B, already disclosed, are top views of identification documents according to the prior art;

[0042] FIG. 2 is a cross-sectional view of an identification document according to the invention;

[0043] FIG. 3 is an example of a top view of an identification document according to the invention;

[0044] FIGS. 4A-4D are examples of front and rear views of the second visual marking according to the invention, under different lights.

DETAILED DESCRIPTION

[0045] This description provides examples not intended to limit the scope of the appended claims. The figures generally indicate the features of the examples, where it is understood and appreciated that like reference numerals are used to refer to like elements. Reference in the specification to one embodiment or an embodiment or an example means that a particular feature, structure, or characteristic described is included in at least one embodiment described herein and does not imply that the feature, structure, or characteristic is present in all embodiments described herein.

[0046] The invention is proposing a method wherein the second visual marking is an engraved optically variable printing ink patch, inserted inside the identification document body. For that, a see-through portion is provided in the identification document bodymore simply named bodyand an optically variable printing ink patchnamed OVI patchis laminated with at least one transparent layer located in the see-through portion. A cross-sectional view of a body 150 is represented on FIG. 2. This cross-sectional view is showing several transparent layers 101-105for example transparent polycarbonate (PC) layersshared over and under each opaque layer 111-112for example opaque polycarbonate (PC) layer. Openings 121, 122 provided in each of the opaque layers 111,112 and superposed one with the other are constituting a window 120. The window 120 is a see-through portion in the body 150 wherein only transparent layers cross over the openings 121, 122.

[0047] According to the invention, the OVI patch 131 is laminated with at least one transparent layer, e.g. the transparent layer 101, within the window 120. The OVI patch 131 may be inserted at any location inside the window 120 and laminated with any of the transparent layers of the structure once it is under a transparent layer. The OVI patch 131 may be inserted at any location inside the window 120 and positioned in register with the openings of the windows. Further, the OVI patch 131 may have any shape, size and number in the document. An identification document may have for example several windows 120 with an OVI patch within each. One OVI patch 131 laminated with at least one transparent layer is named laminated OVI patch and is referenced 132. In the embodiment shown in FIG. 2, the OVI patch 131 is laminated between two transparent layers 101 and 102. Whatever the embodiment, the laminated OVI patch 132 is visible inside the window 120.

[0048] According to the invention, the surface of the laminated OVI patch 132 is engraved with a laser beam 200 in order to personalize the OVI patch and form the second visual marking 130. The OVI patch 131 is thus laser irradiated through the transparent layer 101. The engraving of the laminated OVI patch 132 is made with a low power laser beam represented by the arrow 200a on FIG. 2. Indeed, using a low power laser beam on a laminated OVI patch 132 allows the engraving of only the surface of the OVI patch 131 in order that only a part of the OVI pigments are irradiated. The low power laser beam do not fully penetrate the ink layer. In this way, since only the surface of the pigments is modified, the OVI patch 131 does not bubble under the laser irradiation effects.

[0049] The second visual marking 130 comprises an identification data, already marked on the body 150, but personalized in order to be different from the already marked identification data. The identification data may be for example a portrait picture of the owner of the identification document or any other picture, drawing or alphanumeric data relative to the owner of the identification document. This portrait picture may be marked in a first area of the body and form the first visual marking. The second visual marking may thus comprise the same portrait picture as the first visual marking but with a personalization made by laser engraving.

[0050] FIG. 3 represents an example of a top view of an identification document according to the invention. This identification document 100 comprises two visual markings: [0051] the first visual marking 140, at a first area, is a portrait picture of the document owner with, for example, a first personalization. This first visual marking 140 may be made with the same personalizing method than the first visual marking of the prior art. Thus, the first visual marking 140 is laser engraved into transparent layers whose at least one is doped in order to be laser sensitive. The first visual marking 140 of the invention is made by engraving the first area with a first laser beam at a usual power. [0052] the second visual marking 130, at a second area, is another personalization of the same portrait picture than the first visual marking 140. The second visual marking 130 is made, as indicated above, by engraving the laminated OVI patch 132 in the window 120. The engraving of the laminated OVI patch 132 is made with a second laser beam at a lower power than this used for the first visual marking.

[0053] According to the invention, the laser power of the first laser beam used for making the first visual marking 140 is higher than the laser power of the second laser beam used for personalizing the laminated OV patch 132. For example, the laser power for the first visual marking is selected so that the laser additive included in the document body plastic material layers is activated and resulting in blackening of the body material. Thus a full grayscale from white to black marking can be obtained. The laser power for the second visual markingand the third visual marking described lateris selected low enough that the laser additive in the body plastic material layers is not activated but power is set high enough that the laser beam is able to ablate or thermally modify the pigments in the optically variable ink to produce the loss of the optically variable effect and not to cause material burning or bubble formation.

[0054] According to some embodiments, the first visual marking is a positive visual marking and the second visual marking is a negative visual marking. In the positive marking, the dark outline of the portrait picture is burned with laser and the light areas are untouched. On the opposite, in the negative marking, the light areas are lasered out and the dark outline is untouched.

[0055] In the embodiment of FIG. 2, the OVI patch 131 is laminated between two transparent layers 101 and 102. In such an embodiment, the laminated OVI patch 132 comprises a first side S1 and a second side S2. The first side S1 is for example the side the nearest from the overtop of the body 150, the second side S2 being the opposite side of the laminated OVI patch 132 i.e. the side the nearest from the bottom surface of the body 150. In this embodiment, a third visual marking may be engraving by a third laser beam on the second side S2, as shown by the arrow 200b. Indeed, since only the surface of the first side S1 of the laminated OVI patch 132 is engraved for forming the second visual marking 130, the second side S2 of said laminated OVI patch 132 may be also engraved without generating any interaction with the second visual marking.

[0056] FIGS. 4A and 4B represent the first and the second visual markings of a same identification document. FIG. 4A shows an example of the second visual marking 130 in the window 120. FIG. 4B shows an example of a third visual marking 160 in the window 120. In this embodiment, the second visual marking 130 is a portrait picture of the identification document owner, personalized by laser engraving. The OVI patch 131 is a rounded rectangle laminated between two transparent layers 101, 102 and comprising the portrait picture. The laminated OVI patch first side S1 has been engraved by a low power laser beam. The third marking 160 is an identification data engraved on the laminated OVI patch second side S2 by the same low power laser beam as the first side. For example, the identification data of the third marking 160 may be alphanumeric data like the owner birthday date or the identity card number, etc.

[0057] In the embodiment of FIGS. 4A, 4B, the second and third visual markings 130, 160 form respectively the recto and the verso of the laminated OVI patch 132. Such an embodiment allows a double personalization of the laminated OVI patch within the window 120 without any of these personalizations interfere with the other. This double personalization is added to the personalisation with the first visual marking 140.

[0058] The skilled person would understand that data engraved on the laminated OVI patch could be indifferently a portrait picture or alphanumeric data or any other data, relative or not to the identification document owner, the data engraved on first side being identical to or different from these of second side.

[0059] In the embodiment of FIGS. 4A and 4B, the OVI patch 131 comprises an ink opening 170. This ink opening 170 is visible on any of the first and second sides of the OVI patch, further enhancing the security of the identification document. An example of this ink opening 170 in a non-engraved OVI patch is shown in FIG. 4C. In this example, the ink opening 170 is a star that is visible in the window 120 on each side S1, S2 of the OVI patch 131. Therefore, the first side and the second side of the OVI patch 131 can be differently personalized while having a common element i.e. the ink opening 170.

[0060] As above disclosed, irradiating the laminated OVI patch 132 with a low power laser beam allows several advantages. One supplemental advantage is that the visual perception of the marking varies depending of the light wavelength. FIGS. 4A to 4D represent the laser engraved OVI patch under several light wavelengths. For example, a personalized portrait picture is visible on the first side S1 of the OVI patch under a normal light (in the range of about 400 to 700 nm), as shown in FIG. 4A. Further, under a light of about 850 nm, the marking, like the engraved numeric data of the second side S2 of the OVI patch, is visible as shown in FIG. 4B. On the opposite, under UV light (between 10 and 400 nm), the personalization is not visible as shown on FIG. 4D. Furthermore, under a strong transmissive light, such as visible light between about 400 and 700 nm, the numeric data on the second side S2 is not visible even if the ink opening is visible, as shown in FIG. 4C. Whatever the embodiment, the identification document according to the invention allows at least one double personalization of the identification data, getting more yet difficult the counterfeiting of the identification document, with a manufacturing low cost.

[0061] While only some selected embodiments have been chosen to illustrate the present invention, it will be apparent to the skilled person from this disclosure that various changes and modifications can be made herein without departing from the scope of the invention as defined in the appended claims. The structures and functions of one embodiment can be adopted in another embodiment. Further, it is not necessary for all advantages to be present in particular embodiments at the same time.