a basic frame;

at least one supporting surface of a ceramic manufactured article having a surface to be decorated, where said supporting surface is associated with said basic frame and is movable along a direction of forward movement;

a plurality of printing heads each provided with a plurality of nozzles substantially aligned with each other along a relevant line of action and adapted to dispense ink along a relevant direction of dispensing, each of said heads defining a respective range of action on the surface to be decorated,

wherein said heads comprise at least one fixed head, the line of action of which is fixed and substantially parallel to said supporting surface, and at least one swivel head with variable inclination between at least one neutral configuration, wherein the relevant line of action is substantially parallel to said supporting surface, and at least one special configuration, wherein the relevant line of action is inclined with respect to said supporting surface; and

a plurality of groups of said heads, where each of said groups comprises a plurality of rows of said heads arranged parallel to each other along a direction transverse to said direction of forward movement, the heads of each of said rows being staggered with respect to the heads of the adjacent row belonging to the same group so that their ranges of action involve the whole width of the surface to be decorated, transversely to said direction of forward movement, when said swivel heads are in neutral configuration, the ranges of action of said heads covering only partly the width of the surface to be decorated with said swivel heads in special configuration,

wherein each of said heads has two end nozzles arranged along the relevant line of action and, when said swivel heads are in neutral configuration, the lines of action of the heads belonging to each of said rows are substantially aligned to each other and the distance between the end nozzles of the heads of each of said rows and the end nozzles of the consecutive beads, belonging to the adjacent row of the same group, is substantially equal to the distance between two of said nozzles belonging to the same head and consecutive to each other, and

wherein each of said groups of heads is adapted to dispense a corresponding color of ink.