Intaglio printing press

An intaglio printing machine for printing securities, particularly bank notes, comprising a main structure (6), a plate cylinder (4) with at least one printing plate, an impression cylinder (3), a wiping device (10) and an inking system consisting of a collector inking cylinder (5) which has an elastic surface interacting with the printing plates, of at least four color-selector cylinders (7a to 7d) placed one beside the other around part of the circumference of the collector inking cylinder (5) and having reliefs that correspond to the colored regions to be printed in the various colors and in contact with the periphery of the collector inking cylinder (5), and of an inking device (8a to 8d) associated with each color-selector cylinder (7a to 7d) and mounted in a mobile inking carriage (9), wherein the ratio between the diameter of the collector inking cylinder (5) and the diameter of the plate cylinder (4) is equal to 2/3;

• wherein the two extreme color-selector cylinders (7a, 7d) are placed so that they are approximately diametrically opposed with respect to the collector inking cylinder (5), and wherein the lateral walls of the inking carriage (9), on the same side as the color-selector cylinders, each comprise a recess (15) which is dimensioned in such a way that when the inking carriage (9) is in the working position, the color-selector cylinders (7b, 7c) which are between said two extreme color-selector cylinders (7a, 7d) lie wholly in the space defined by said recess (15).