Patent ID: 6488365
Filing Date: 2002-12-03
Classification: B41J

Abstract:
A liquid discharging head comprising:a discharge port for discharging liquid; a liquid passage communicated with said discharge port; a bubble generating area for generating a bubble in the liquid in said liquid passage, said bubble generating area including heating means for heating the liquid in the liquid passage; and a movable member disposed in a confronting relation to said bubble generating area in said liquid passage and adapted to be shifted by pressure caused by generating the bubble at said bubble generating area to direct the pressure toward said discharge port and to be returned to its initial position by negative pressure due to contraction of the bubble; and wherein said movable member is shaped such that, when said movable member is moved away from said bubble generating area, a liquid resistance against said movable member is less than that when said movable member is moved towards said bubble generating area.