Patent ID: 7637591
Filing Date: 2009-12-29
Classification: B41J

Abstract:
1. An ink-jet head which jets a plurality of different color inks, the ink-jet head comprising: a plurality of pressure chambers aligned in a first direction; a plurality of ink chambers which communicate with the pressure chambers respectively and each of which stores one of the inks; an ink-jetting surface on which a plurality of nozzle holes of nozzles are formed, the nozzles communicating with the pressure chambers respectively and including a plurality of multi-nozzles each of which has a plurality of nozzle holes; and a plurality of individual ink channels each of which communicates with one of the ink chambers, one of the pressure chambers, and one of the nozzles, wherein: the nozzle holes of each of the multi-nozzles communicate with one of the individual ink channels; symmetric-centers of the plurality of nozzles are arranged on the ink-jetting surface in a line extending in the first direction with at least two multi-nozzles having symmetric centers arranged in a line extending in the first direction; and wherein when the multi-nozzles are shifted in the first direction to make the symmetric-centers of the multi-nozzles mutually coincident, the multi-nozzles include at least two multi-nozzles which do not mutually overlap.