B - Operations – Transporting – 41 – M
Patent
B - Operations, Transporting
41
M
B41M 1/24 (2006.01) B41C 1/00 (2006.01) B41M 3/14 (2006.01) B41N 1/06 (2006.01) B42D 15/00 (2006.01) B41C 1/02 (2006.01)
Patent
CA 2472020
A method for producing a security document having printed image 1 produced by steel intaglio printing and embossed microstructures 2 of an order of magnitude of less than 100 microns is carried out by means of one printing plate 8 on which both the steel intaglio structures and the microstructures are present. The parts of the microstructures closest to printing plate surface 9 are located 20 to 100 microns below the printing plate surface so that they are not touched and destroyed by the wiping cylinder. Alternative methods for producing a steel intaglio printing plate with integrated microstructures are stated. The microstructures can be used for embossing a diffractive relief or a blind embossing.
L'invention concerne un procédé de production d'un document de sécurité comportant une image imprimée (1) réalisée par héliogravure acier et des microstructures en relief (2) de l'ordre de 100 microns maximum à l'aide d'une seule plaque d'impression (8), sur laquelle figurent les structures en héliogravure acier comme les microstructures. Les constituants des microstructures les plus proches de la surface de plaque d'impression (9) sont de l'ordre de 20 à 100 microns en retrait de la surface de la plaque d'impression pour éviter leur contact avec le cylindre d'essuyage et donc leur endommagement. L'invention concerne également en variante, un procédé de production d'une plaque d'héliogravure en acier pourvue de microstructures intégrées. Les microstructures peuvent servir à la gravure d'un relief à déflexion ou d'un gaufrage à froid.
Braun Eckhard
Plaschka Reinhard
Giesecke & Devrient Gmbh
Ridout & Maybee Llp
LandOfFree
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