Patent EP-2121320-A1 (EP)
Inventor: SCHILLING ANDREAS
IPC: D21H21/44
Filed: 2008-02-07
Abstract: The security document (3) in the form of a multilayer film body for viewing in incident light and in transmitted light, comprises a carrier film (31) and a partial metallic reflective layer in a first region (40) that is transparent/semi-transparent when viewed by a human in transmitted light. In the first region, linear/band shaped first zones (41) provided with the reflective layer, and second zones (42) not provided with the reflective layer, are alternately arranged. The first region has patterned region with dimensions of greater than 300 mu m and background region. The security document (3) in the form of a multilayer film body for viewing in incident light and in transmitted light, comprises a carrier film (31) and a partial metallic reflective layer in a first region (40) that is transparent/semi-transparent when viewed by a human in transmitted light. In the first region, linear/band shaped first zones (41) provided with the reflective layer, and second zones (42) not provided with the reflective layer, are alternately arranged. The first region has patterned region with dimensions of greater than 300 mu m and background region adjoining the patterned region partially enclosing the background region. The distances of consecutive second regions in the patterned region differ by 5-30% in relation to the distances of second regions in the background region. First information determined by the form of the patterned region is visible for human observer. The width and length of the first zones are smaller than 20-60 mu m and greater than 1000 mu m respectively. In the first region, the total area of the first zones occupies a surface portion of less than 10% of the total area of the first and the second zone. The longitudinal axis of the first zones is oriented in the direction of a first and second axes of the co-ordinate systems stretched in the first region. The surface focus lines of the first zones are varied along the first axis in the direction of the second axis according to a second specified information and are distanced from each other between 30-40 mu m in the direction of the second axis. The width of the first zones in the patterned and background regions differs from 15-25%. Each of the first and the second zones has dimension of less than 300 mu m. In the first zone, isotrope/anisotrope matt structures are formed on the reflection layer, which deflects the incident light partially from the mirror reflex of the plane stretched by the film body and the portion of the surface of the first zones on the total surface of each patterned region differentiates itself from the portion of the surface of the first zones on the total surface of each background region by 5-30%. Surface focus points of the first zones are separated from each other by less than 300 mu m and are uniformly spaced in the direction of the first and second axes. The minimum and the maximum average surface covered by the first zones in relation to a measurement of 300 mu m x 300 mu m of each patterned region differ by 5-30% from the minimum and the maximum average surface area of each background region. The average surface of the patterned and background regions is constant. The total surface of the first zones in the patterned region is occupied a portion of the surface of 5-30% of the total area of the patterned region. The matt structure in the reflection layer is formed in 30% of the area of the background and the patterned region and represents line structures, diffractive structures, and linear and/or crossed diffraction grid. The portion of the surface area of the reflection layer in the regions differs by 20%. The structure in the incident light provides a fourth information in the second region that partially covers the first region and has uniformly formed first and second pattern-like subareas that have measurements greater than 300 mu m. In the sub areas, different matt structures are formed in the reflection layer and/or the sub areas have different form. The optional/further subareas are arranged in the form of a repetitive model. The subareas are oriented to one/two-dimensional raster. The document has a further partial metallic reflection layer, in which a second structure is formed and which is identically provided for the first reflection layer in the first zone and is not provided in the second zone. The first structure provides the fourth information and the second structure gives a fifth information that differs from the fourth information, so that the fourth information during viewing from the sides of the reflection layer in incident light, the fifth information during viewing from the sides of the further reflection layer and the first information during viewing in the transmitted light are visible. The structure is formed in a replication layer of the document or a first-, second- and third decorative layer are provided in the document and provide fourth-, fifth- and sixth information respectively. The replication layer and the first decorative layer are arranged between the reflection layer and first upper surface of the document. The replication layer and the second decorative layer are arranged between the reflection layer and second upper surface, so that the fourth and fifth informations during viewing from the sides of the first and second upper surfaces in incident light are visible. The replication layer and the third decorative layer are arranged between the reflection layer and first upper layer, so that the fifth and sixth informations during the viewing are visible. The decorative layers are a thin film layer system, a fluid crystal layer and/or an optically variable pigment-containing layer. The first zones are microstructured for the provision of third information. The document has a paper substrate and is a laminating foil. A window shaped opening in the first region is brought into the carrier substrate. The carrier film has the form of a strip and the window shaped opening projects on both sides in the direction of the longitudinal axis of the strip.