Disclosed is a flexographic printing device for a laminating machine, including at least one pair of shoulders mounted on a trolley frame, a blade chamber for containing printing ink; an Anilox roller that rotates in contact with the printing ink, a print roller holding a printing clich? that rotates in contact with the Anilox roller and a counter-pressure roller that rotates in contact with the clich? held by the print roller, wherein at least the Anilox roller and the print roller are supported by respective supports that can slide with respect to the shoulders in a direction substantially orthogonal to their axes, the printing device also including at least one first motor for rotating the Anilox roller, at least one second motor for rotating the print roller and possibly a third motor for rotating the counter-pressure roller.

A print station includes a chamber in which a cardboard sheet transits, two first support elements for an inking roller on internal faces of two opposite and facing walls of the chamber, at least two second support elements for the inking roller on the internal faces of the two walls, and a carriage positionable inside the chamber for restingly receiving the inking roller. The print station also includes an automatic system for moving and positioning the inking roller whether in a raised operating position, below a print roller; in a first lowered position at the first pair of support elements, for releasing or collecting the inking roller; in a second lowered position at the second pair of support elements for releasing or collecting the inking roller; or in a third lowered position at the carriage for releasing or collecting the inking roller.

The invention relates to a method for aligning at least two cylinders in a parallel manner relative to each other. In a first step, one cylinder is rotated and moved in a parallel manner towards the other cylinder in order to align a first end of the cylinder, and in a second step, the second end of the cylinder is rotated and moved towards the other cylinder in order to align the second end of the cylinder.

An adjuster for first and second print rollers carried on respective first and second supports has a first spindle extending along and rotatable about an axis between the supports and formed with a pair of axially spaced screwthreads of the same hand but of different pitches. One of the screwthreads is threaded into the first support and the other into a first nut rotatable about the axis and axially fixed in the second support. A mechanism serves for either arresting the nut against rotation relative to the second support and or rotating the nut relative to the second support.