| 摘要 |
PROBLEM TO BE SOLVED: To provide a droplet discharging head, which can discharge highly viscous liquid in normal temperature at high driving frequency. SOLUTION: A tailing 3 is cut off through the generation of heat and the evaporation of solvent by being energized after its discharging at the finest portion in the rear end in flying direction of the tailing 3, resulting in separating a droplet 2 from a nozzle 16. Then, as shown in Fig.4(C), in accompany with the conveyance of a medium P, the droplet 2 is completely separated from the liquid 4 in the nozzle 16, and at the same time, the liquid 4 in the nozzle 16 side is pulled back into a flow passage 13. As a result, the settling of the level (meniscus) of the nozzle 16 as shown in Fig.4(D) becomes quick and refill (re-charging) near the nozzle 16 does not slow down, resulting in making a high frequency discharging possible. As shown in Fig.4(E), even under the condition that the medium P is being conveyed, an impact form 5 becomes a nearly perfect circle which is favorable, as the tailing 3 is cut off immediately after the impact of the droplet 2. COPYRIGHT: (C)2009,JPO&INPIT
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