Dispensing device for decorating ceramic tiles with granular or powdered materials

A dispensing bar for granular or powdered materials, comprising two or more dispensing devices (1), each dispensing device (1) comprising:

• a main body (200);
• a dispensing channel (2a), arranged at least partially in the main body (200) and provided with a longitudinal axis (X), an inlet opening (21) and an outlet opening (22);
• a suction means, provided to retain, upon command, at least a part of granular or powdered material inside the dispensing channel (2a), so as to form an accumulation that obstructs the dispensing channel (2a) and prevents the flow of material;
• at least one suction opening (23), placed in communication with the dispensing channel (2a) and with the suction means;
• a filter (20), interposed between the suction opening (23) and the dispensing channel (2a);
• wherein each dispensing device comprises at least one ventilation portion (20b), associated with the main body (200) and connected to the inlet opening (21), which is provided with an outer surface (20d) placed in communication with an environment at a determined pressure;
• wherein the dispensing devices (1) are flanked to one another along an alignment direction (Z) and joined together at predetermined zones of the respective bodies (200), so that the bodies (200) substantially form a single body (200);
• and
• wherein the suction means is connected to the suction openings (23) through suction conduits (231), arranged through the single body (200).