Multiple-color flexographic rotary printing machine

The machine according to any one of the preceding claims, characterized in that it comprises a disc-type braking system which is keyed onto a shank of said central drum and at least one caliper for engaging said disc on command.

The machine according to any one of the preceding claims, characterized in that it comprises an electronic controller for driving at least said source of motion and said braking system of said central drum.

The machine according to any one of the preceding claims, characterized in that it comprises at least one first transducer which is mounted so as to be axially aligned with said rotor of said electric motor of said central drum and is suitable to generate electric signals which represent the position and angular velocity of said rotor, and therefore of said central drum, and to send them to said electronic controller in order to drive and control the motion of said central drum.

The machine according to any one of the preceding claims, characterized in that it comprises a source of motion for the or each printing plate cylinder and for the or each anilox roller.

The machine according to any one of the preceding claims, characterized in that it comprises means for coupling the or each printing plate cylinder to the respective supporting elements, which are suitable to allow the rotation and axial sliding of the or each printing plate cylinder in relation to the respective supporting elements.

The machine according to any one of the preceding claims, characterized in that it comprises at least one movable support for said axial shank of the or each printing plate cylinder, retained so as to perform transverse strokes with respect to said rotation axis of the respective printing plate cylinder in order to allow transverse printing registration.

The machine according to any one of the preceding claims, characterized in that it comprises a second transducer which is mounted in axial alignment with said rotor of said electric motor of the or each printing plate cylinder, said transducer being suitable to generate electric signals which are representative of the position and angular velocity of said rotor and therefore of each printing plate cylinder and to send them to said electronic controller in order to drive and control the motion of each printing plate cylinder and synchronize it with the motion of said central drum and of the remaining printing plate cylinders and anilox rollers.