| 摘要 |
<p>A device for dispensing material such as liquid formulations comprises a nozzle (12, Fig. 3), a passage (42) leading to the nozzle, means (50, 56, 52, 54) for establishing a slug of material in the passage (42), means (66, 68, 72, 74) for pneumatically ejecting the slug of material from the nozzle in response to operation of actuator (36) and means (32, 46, 44) for applying high voltage to the slug of material so that when the slug breaks up following ejection, the spray comprises electrically charged particles.</p> |
