EP 1924446 B1 20190612 - CERTIFICATE OF AUTHENTICITY WITH MICRO-REFRACTION IMAGE
Title (en)
CERTIFICATE OF AUTHENTICITY WITH MICRO-REFRACTION IMAGE
Title (de)
ECHTHEITSZERTIFIKAT MIT MIKRO-REFRAKTIONSBILD
Title (fr)
CERTIFICAT D'AUTHENTICITÉ AVEC MICRO-IMAGE DE REFRACTION
Publication
Application
Priority
- EP 2006008038 W 20060814
- DE 102005039113 A 20050818
Abstract (en)
[origin: CA2619531A1] A substrate comprises a periodic line pattern covered by a periodic line structure consisting of cylindrical lenses parallel to a line pattern lenses . The period of the line structure corresponds to the period of the line pattern. The lenses are aligned with the lines of the line pattern. The line s consist of elementary printing points or image points (pixels). The number o f elementary printing points in a period is equal to or greater than 4 and equ al to or less than 16. The height of the cylindrical lenses on apex corresponds to at least a half width of a period and at most to the width of the line pattern width. A modern offset printing method, for example used for securit y printing (for example, for banknotes) makes it possible to attain the impression accuracy about 4 ~m. The elementary printing points are selected such that they are slightly greater than an attainable printing accuracy. Th e inventive fine lens structures can be produced by printing a transparent mas s by means of an intaglio printing method or by stamping of the transparent ma ss by an intaglio-engraving plate. The thus produced micro-refraction image is particularly suitable for an authenticity certificate.
IPC 8 full level
B42D 25/29 (2014.01); B41M 3/14 (2006.01); B42D 25/324 (2014.01)
CPC (source: EP US)
B41M 3/14 (2013.01 - US); B42D 25/29 (2014.10 - EP US); B42D 25/324 (2014.10 - EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
DE 102005039113 A1 20070222; CA 2619531 A1 20070222; CN 101291817 A 20081022; CN 101291817 B 20101215; EP 1924446 A2 20080528; EP 1924446 B1 20190612; JP 2009505146 A 20090205; JP 5242394 B2 20130724; US 2008309063 A1 20081218; WO 2007020048 A2 20070222; WO 2007020048 A3 20070913
DOCDB simple family (application)
DE 102005039113 A 20050818; CA 2619531 A 20060814; CN 200680038958 A 20060814; EP 06776847 A 20060814; EP 2006008038 W 20060814; JP 2008526426 A 20060814; US 6405506 A 20060814