Patent ID: 7625074
Filing Date: 2009-12-01
Classification: B41J

Abstract:
1. A liquid droplet-jetting apparatus which jets a droplet of a liquid, the liquid droplet-jetting apparatus comprising: a flow passage unit which includes a plurality of pressure chambers arranged along a plane, a plurality of nozzles communicated with the pressure chambers, respectively, and a common liquid chamber communicated with the pressure chambers; and an energy-applying mechanism which applies discharge energy to the liquid in the pressure chambers, wherein the common liquid chamber includes: an inflow port into which the liquid to be supplied to the pressure chambers is inflowed; a main portion which extends in a first direction; a connecting portion which has an end connected to one end of the main portion, which extends in a second direction, and which has a cross-sectional area, in a direction perpendicular to the second direction, smaller than a cross-sectional area of the main portion in a direction perpendicular to the first direction; and an extended portion which has an end connected to the other end of the connecting portion on a side opposite to the main portion, which extends in a third direction, and which has a cross-sectional area, in a direction perpendicular to the third direction, greater than the cross-sectional area of the connecting portion; wherein the pressure chambers are arranged in the first direction; wherein the main portion has a substantially constant cross-sectional area in the direction perpendicular to the first direction; and wherein the inflow port is provided on the main portion at an area on a side opposite to the connecting portion, with the pressure chambers being intervened between the inflow port and the connecting portion.