B - Operations – Transporting – 23 – K
Patent
B - Operations, Transporting
23
K
B23K 26/02 (2006.01) B23K 26/04 (2006.01) B23K 26/08 (2006.01) B41C 1/05 (2006.01) B41M 1/10 (2006.01) B41N 1/06 (2006.01)
Patent
CA 2723738
There is described a method for manufacturing intaglio printing plates for the production of security papers, wherein a laser beam (2) is used to engrave intaglio printing patterns (3, 3.1, 3.2, 3.3) directly into the surface of a laser- engravable, especially metallic, printing plate medium (1 ), wherein laser engraving of the printing plate medium (1 ) is carried out layer by layer in several individual engraving steps performed one after the other in register so that the intaglio printing patterns (3, 3.1, 3.2, 3.3) are gradually engraved into the surface of the printing plate medium (1 ) up to desired engraving depths, the surface of the engraved printing plate medium (1 ) being cleaned from residues of the laser engraving process following and between each individual engraving step.
Linvention concerne un procédé de fabrication de plaques d'impression en creux pour la production de papiers infalsifiables. Un faisceau laser (2) est utilisé pour graver des modèles d'impression en creux (3, 3.1, 3.2, 3.3) directement sur la surface d'un support de plaque d'impression composé notamment de métal et pouvant être gravé au laser (1). La gravure au laser du support de plaque d'impression (1) est réalisée couche par couche en plusieurs étapes de gravure individuelles réalisées les unes après les autres en registre, de sorte que les modèles dimpression en creux (3, 3.1, 3.2, 3.3) soient progressivement gravés dans la surface du support de plaque dimpression (1) jusquà atteindre des profondeurs de gravure souhaitées. Les résidus du procédé de gravure au laser sont nettoyés de la surface du support de plaque dimpression en creux gravé (1) après chaque étape de gravure individuelle.
Gowling Lafleur Henderson Llp
Kba-Giori S.a.
Kba-Notasys Sa
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