B - Operations – Transporting – 42 – D
Patent
B - Operations, Transporting
42
D
B42D 15/00 (2006.01) B42D 15/10 (2006.01)
Patent
CA 2707728
The present invention relates to an optically variable security element (12) for securing valuable articles, having an optically variable ink layer (40) that includes first, optically variable effect pigments (34) for producing a viewing-angle-dependent visual impression, and that includes second effect pigments (36) that are reversibly alignable by an external magnetic field, the degree of markedness of the viewing-angle-dependent visual impression of the optically variable effect pigments (34) depending on the orientation of the magnetically alignable effect pigments (36) relative to the plane of the ink layer (40).
L'invention concerne un élément de sécurité (12) optiquement variable destiné à protéger des objets de valeur. Cet élément de sécurité (12) comprend une couche colorée optiquement variable (40) qui contient des premiers pigments à effet (34) optiquement variables destinés à produire un effet visuel qui dépend de l'angle d'observation, ainsi que des deuxièmes pigments à effet (36) orientables de façon réversible au moyen d'un champ magnétique extérieur. Selon l'invention, le degré d'intensité de l'effet visuel des pigments à effet (34) optiquement variables dépendant de l'angle d'observation dépend de l'orientation des pigments à effet (36), orientables magnétiquement, par rapport au plan de la couche colorée (40).
Bornschlegl Alexander
Mengel Christoph
Giesecke & Devrient Gmbh
R. William Wray & Associates
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