Patent ID: 8882241

Claim:
A liquid-jet head comprising: a plurality of nozzles; a plurality of pressurized liquid chambers configured to communicate with the respective nozzles; a common liquid chamber configured to communicate with each of the pressurized liquid chambers, each of the common liquid chamber and the pressurized liquid chambers having a negative pressure of a predetermined value; a plurality of first communicating paths configured to communicate between the common liquid chamber and the corresponding pressurized liquid chambers, each of the first communicating paths serving as a filter to prevent air bubbles residing in the common liquid chamber from intruding into the corresponding pressurized liquid chamber, the filter having a plurality of openings, each of the openings having an opening area smaller than an opening area of each of the nozzles, the openings serving as a liquid flow path between the common liquid chamber and the corresponding pressurized liquid chamber; an air bubble discharge chamber including an opening part from which air bubbles are discharged in a maintenance-restoration operation; and a second communicating path configured to communicate between the air bubble discharge chamber and an air bubble remaining part inside the common liquid chamber where air bubbles are likely to remain, wherein the air bubbles enter the opening part of the air bubble discharge chamber via the second communicating path, wherein the second communicating path is configured to bridge between an internal part of the common liquid chamber and a wall surface of a member constituting the common liquid chamber, in a nozzle array direction, and wherein the opening part of the air bubble discharge chamber is formed in apart of a wall surface of a member constituting the air bubble discharge chamber, and the opening part of the air bubble discharge chamber is formed in the part of the wall surface that faces in a direction that is same as a direction in which a nozzle surface in which the nozzles are disposed faces.