Patent ID: 7922303

Claim:
An ink-jet head comprising: a flow channel unit comprising: a plurality of laminated plates comprising a first plate, a second plate, and a third plate, wherein the plurality of laminated plates is configured to form a common ink chamber, a plurality of nozzles, and a plurality of pressure chambers therethrough; and a plurality of individual ink flow channels, each individual ink flow channel configured to extend from the common ink chamber to one of the plurality of nozzles via one of the plurality of pressure chambers, wherein the first plate comprises a plurality of apertures configured to place the common ink chamber and the pressure chambers in fluid communication, and wherein a surface of the first plate adjacent to the second plate, has a plurality of first recesses extending away from the second plate, the first recesses configured to be in fluid communication with the atmosphere, and a plurality of second recesses extending toward the third plate, being surrounded by the plurality of apertures, and wherein a surface of the third plate has a plurality of third recesses extending away from the first plate, and an opposite surface of the first plate has a plurality of openings therethrough, the plurality of openings being configured to place the first and second recesses in fluid communication with the third recesses of the third plate, wherein the first recesses and the second recesses extend only partially through the first plate.