CENTRE NATIONAL DE LA RECHERCHE SCENTIFIQUE (France)
UNIVERSITÉ JEAN MONNET SAINT ETIENNE (France)
Inventor
Ayala, Stéphane
Destouches, Nathalie
Hèbert, Mathieu
Dalloz, Nicolas
Doan Le, Van
Abstract
A method of generating a reduced palette for use in a printing process is disclosed. In the method, a plurality of images obtainable by varying printing parameters of the printing apparatus are printed, and color values of the same are measured. Based on the color values, a clustering is performed to obtain a plurality of clusters having similar color values. For each cluster, one or more representative images are selected to form the palette. In this manner, images with color values both inside a convex hull and on the convex hull can be included in the palette.
A security document includes a security feature with a hologram and a color image arranged on top of each other. Holographic features of the hologram are visible when the security document is viewed under white light, and a plurality of image features of the color image are visible when the document is viewed under UV light. The image features are perfectly aligned with the holographic features. This can be achieved, for example, by providing one or more registration marks when forming the holographic features, and using said registration marks to later print the color image. Another possibility is to use the structure of the hologram to selectively apply two or more UV-sensitive ink materials onto the hologram to automatically align the same with the holographic features.
An identification document (1) such as a passport booklet, comprising a cover foldable at a folding line (X), an end sheet (11) being foldable at the folding line (X) and attached to the cover, at least one sheet (10) being foldable at the folding line (X), and a closed circuit. The closed circuit comprises an electrical device (25) such as an integrated circuit (35) or a LED light (36) and a conductive thread (20) attaching the at least one sheet (10) to the end sheet (11). The device (25) malfunctions when the closed circuit is interrupted by means of manipulation of the conductive thread (20).
A laser engraving apparatus (100) is calibrated using a number of predetermined calibration images (12). The calibration images (12) are engraved on a predefined substrate surface (14, 15) of a substrate (16) by varying only a single laser parameter. Based on measured colour values of the engraved calibration images, a relationship between said colour values and a predefined laser parameter value, for example, a predefined laser power, is established. This relationship is then used to generate a map for mapping a grayscale value of an input image to a grayscale value of an output image, which is then engraved on the substrate (16) while varying the same laser parameter that was varied during the calibration.
A secure multi-layered structure (14), for example, for a secure document, the secure multi-layered structure comprising a first layer (20) having a first aperture (25) opened in the first layer, a second layer (30) having a second aperture (35) opened in the second layer, and a third layer (40) having a third aperture (45) opened in the third layer, wherein each layer at least partially overlaps with the layer adjacent to it, at least a portion of the third layer being visible through the first aperture.
B32B 3/26 - Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shapeLayered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layerLayered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shapeLayered products comprising a layer having particular features of form characterised by a layer with cavities or internal voids
B32B 27/08 - Layered products essentially comprising synthetic resin as the main or only constituent of a layer next to another layer of a specific substance of synthetic resin of a different kind
6.
Inlet sheet for a book-like electronic identification document
An inlay sheet for a book-like identification document. The inlet sheet may include a first hinge layer comprising polycarbonate and a second hinge layer comprising a flexible material different to polycarbonate, e.g. PET, polyurethane, fabric, mesh. The second hinge layer is attached to the first hinge layer. A first datapage layer and a second datapage layer are attached to the first hinge layer and the second hinge layer, respectively, such that the first and second hinge layers are positioned between the first and second datapage layers for forming a datapage section having a datapage thickness. The first and second datapage layers form a common datapage inner front edge and the first and second hinge layers extend beyond the common datapage inner front edge such that a hinge section is formed having a hinge thickness smaller than the datapage thickness.
G06K 19/07 - Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards with integrated circuit chips
An inlay sheet for a book-like identification document. The inlet sheet may include a first hinge layer comprising polycarbonate and a second hinge layer comprising a flexible material different to polycarbonate, e.g. PET, polyurethane, fabric, mesh. The second hinge layer is attached to the first hinge layer. A first datapage layer and a second datapage layer are attached to the first hinge layer and the second hinge layer, respectively, such that the first and second hinge layers are positioned between the first and second datapage layers for forming a datapage section having a datapage thickness. The first and second datapage layers form a common datapage inner front edge and the first and second hinge layers extend beyond the common datapage inner front edge such that a hinge section is formed having a hinge thickness smaller than the datapage thickness.
G06K 19/07 - Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards with integrated circuit chips
The present disclosure refers to an inlay sheet (5) configured to be used in a book-like identification document. The inlet sheet (5) may comprise a first hinge layer (21; 21') consisting of polycarbonate and a second hinge layer (22; 22') consisting of a flexible material different to polycarbonate, e.g. PET, polyurethane, fabric, mesh. The second sheet layer (22; 22') is attached to the first sheet layer (21; 21'). A first datapage layer (11) and a second datapage layer (12) are attached to the first hinge layer (21; 21') and the second hinge layer (22; 22'), respectively, such that the first and second hinge layers (21, 22; 21', 22') are positioned between the first and second datapage layers (11, 12) for forming a datapage section (10) having a datapage thickness (tdp). The first and second datapage layers (11, 12) form a common datapage inner front edge (24) and the first and second hinge layers (21, 22; 21'22') extend beyond the common datapage inner front edge (24) such that a hinge section (20) is formed having a hinge thickness (th) smaller than the datapage thickness (tdp). Furthermore, the present disclosure refers to a method for manufacturing such an inlay sheet (5).
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