Patent ID: 8662643

Claim:
A liquid jet head, comprising: a head chip comprising an actuator substrate having a plurality of channels for liquid ejection arrayed on a surface of the actuator substrate; and a cover plate having a liquid supply chamber for supplying liquid to the plurality of channels, the cover plate being stacked on the actuator substrate, wherein the liquid supply chamber communicates with the plurality of channels and has an elongated shape long in an arraying direction of the plurality of channels; and a flow path member disposed on the cover plate for supplying the liquid to the liquid supply chamber, the flow path member comprising an inflow port through which the liquid flows in; an outflow port through which the liquid flows out; and a circulation path along which the liquid is circulated from the inflow port to the outflow port, wherein no filter is interposed in any of a flow path between the inflow port and the channel and a flow path between the outflow port and the plurality of channels, and wherein the circulation path has a sectional area in a direction orthogonal to a circulating direction of a liquid flow, which is larger than a sectional area of the liquid supply chamber in a direction orthogonal to the elongated direction thereof.