Patent ID: 6048058
Filing Date: 2000-04-11
Classification: B41J

Abstract:
An ink jet head comprising:a plurality of ejection orifices for ejecting ink;a common liquid chamber for storing temporarily the ink to be supplied to each of said ejection orifices;a plurality of ink passages, separated by respective liquid passage walls each having a predetermined length and connecting said ejection orifices to said common liquid chamber; anda plurality of energy generating elements each provided on a substrate, corresponding to each of said ink passages for generating energy to eject the ink from each of said ejection orifices;wherein said ejection orifices are grouped into a plurality of blocks comprising a plurality of said ejection orifices in sequence so that said energy generating elements are driven by the block; andan impeding wall for impeding propagation of pressure, produced by driving a block of energy generating elements, to an adjacent block, said impeding wall being provided in said common liquid chamber, corresponding to a dividing line between adjacent blocks,wherein said impeding wall is provided integrally with a grooved member which has a liquid chamber wall for constituting said common liquid chamber and said liquid passage walls, and said ink jet head is constituted by connecting the grooved member and said substrate.