Patent ID: 6984027
Filing Date: 2006-01-10
Classification: B41J

Abstract:
1. An ink-jet head including a passage unit, comprising: a plurality of pressure chambers each connected with a nozzle and arranged in a matrix in a plane to form a plurality of pressure chamber rows in a first direction in said plane; and a common ink passage extending along said first direction and communicating with said pressure chambers, said pressure chamber rows including a first pressure chamber row constituted by pressure chambers each connected with a nozzle deviated on one side thereof with respect to a second direction crossing said first direction, and a second pressure chamber row constituted by pressure chambers each connected with a nozzle deviated on another side thereof with respect to said second direction, when viewing from a third direction perpendicular to said plane, and said common ink passage overlapping the pressure chambers constituting said first and second pressure chamber rows with said nozzles non-overlapped with respect to said third direction so that the nozzles connected with the pressure chambers in each of the first and second pressure chamber rows face outward when viewing from said third direction, wherein said first and second pressure chamber rows are arranged adjacent to each other so that the pressure chambers constituting said first pressure chamber row and the pressure chambers constituting said second pressure chamber row partially overlap each other with respect to said first direction in a region corresponding to said common ink passage.