Patent ID: 6435661
Filing Date: 2002-08-20
Classification: B41J

Abstract:
A liquid discharge head comprising:a discharge port for discharging a liquid; a liquid flow path whose one end portion constantly communicates with the discharge port and which comprises a bubble generating area for generating a bubble in the liquid; a liquid supply port disposed in said liquid flow path and connected to a common liquid supply chamber for storing the liquid to be supplied to said liquid flow path; a plurality of bubble generating means, disposed in said liquid flow path, for generating the bubble in the liquid; and a plate-like movable member disposed in said liquid flow path with the side of said discharge port supported as a free end at a gap of 10 &mgr;m or less with respect to the liquid supply port on the side of said liquid flow path, and provided with a projection area larger than an opening area of said liquid supply port, wherein said discharge port is in a linear communication state with said bubble generating means, and by driving the bubble generating means for generating the bubble with a smallest volume among said plurality of bubble generating means, said movable member seals and substantially shuts off said liquid supply port.