Abstract:
There are described various embodiments of an inking system for inking an intaglio printing cylinder (8) of an intaglio printing press (1 I ; 1 II ; 1 III ; 1 IV ; 1 V ), which intaglio printing cylinder carries one or more intaglio printing mediums (8a, 8b, 8c) that are inked by means of a plurality of inking devices (95; 95*; 95**; 905; 905*). The inking system is designed to perform a selective transfer of ink to the one or more intaglio printing mediums by means of a selective inking cylinder (98; 98*; 98**) provided in at least one of the inking devices, preferably in each of the inking devices. More precisely, the selective inking cylinder carries a selective inking plate (90a) receiving ink supplied by an associated inking unit (96/96a/97; 96*/96a*/97*; 96**/96a**; 906/906a/910/915; 906*/906a*/910*/915*), which selective inking plate comprises a coating (900) that is selectively structured to exhibit ink-repellent portions (910) and perform selective transfer of ink at locations (920) corresponding to engraved areas of the one or more intaglio printing mediums that are to be inked with the ink supplied by the associated inking unit. The selective transfer of ink to the one or more intaglio printing mediums is performed indirectly from the selective inking cylinder to the one or more intaglio printing mediums via an ink collecting cylinder (9) and/or via a chablon cylinder (99*; 99**) carrying a chablon plate (99a) comprising relief portions (99A) corresponding to engraved areas of the one or more intaglio printing mediums that are to be inked with the ink supplied by the associated inking unit.
Abstract:
Il est notamment décrit un procédé de contrôle d'une impression taille- douce, en particulier pour l'impression de papiers-valeurs, notamment de billets de banque. Ce procédé de contrôle inclut la définition sur une plaque d'impression taille-douce (80) de plages de contrôle (150, 151- 55; 170, 171-179) conçues de manière à permettre notamment d'évaluer les effets de la pression d'impression appliquée lors de l'impression d'un substrat au moyen de la plaque d'impression taille-douce (80) et d'évaluer les effets de la charge d'encre appliquée lors de l'encrage de la plaque d'impression taille-douce (80), lesquelles plages de contrôle (150, 151- 55; 170, 171-179) sont gravées dans une portion de la plaque d'impression taille-douce (80) afin de produire des zones de contrôle imprimées correspondantes (160, 161-165) sur le substrat. Le procédé inclut par ailleurs la réalisation de mesures dans les zones de contrôle imprimées permettant d'évaluer la pression d'impression appliquée lors de l'impression du substrat ainsi que la charge d'encre appliquée lors de l'encrage de la plaque d'impression taille-douce (80).
Abstract:
The invention in particular describes a control method for intaglio printing, particularly for printing paper securities, in particular bank notes. This control method includes defining, on an intaglio printing plate (80), control strips (150, 151-55; 170, 171-179) designed so as in particular to make it possible to evaluate the effects of the printing pressure applied during printing of a substrate using the intaglio printing plate (80) and to evaluate the effects of the ink load applied during inking of the intaglio printing plate (8), the control strips (150, 151-55; 170, 171-179) being etched in a portion of the intaglio printing plate (80) so as to produce corresponding printed control zones (160, 161-165) on the substrate. The method furthermore includes performing measurements in the printed control zones making it possible to assess the printing pressure applied during printing of the substrate as well as the ink load applied during inking of the intaglio printing plate (80).