| 摘要 |
PURPOSE:To stably emit a recording liquid, by making the ceiling in the vicinity of the heat energy acting part of a flow passage higher than the ceiling of a part other than said ceiling. CONSTITUTION:A lid plate member 21 constituting the side wall and ceiling of a flow passage is molded from plastic and a cavity 21a is formed to the part opposed to a heat energy acting part. By this constitution, since the flow passage is not blocked by an air bubble 31, stable emission is performed and high printing quality can be obtained. |
