FIELD: measurement.
SUBSTANCE: invention relates to liquid dosing devices intended for operation in printers. Piezoelectric dispenser, including a liquid supply chamber with a membrane, the nozzle cross-section is created by etching along the axes of the crystal, consisting of two glued plates, in one of which there are functional recesses for an inlet channel of liquid supply and a liquid supply chamber with a membrane, to which a piezoelectric element is attached. Wherein nozzle overhang channel features triangular shape while plates feature equal roughness of face part along the entire perimeter of nozzle outlet and wetting angle equal along nozzle perimeter.
EFFECT: increased grouping at drop exit from the nozzle.
1 cl, 4 dwg
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