Patent ID: 7976140

Claim:
A liquid droplet ejecting apparatus comprising: a liquid storage container for storing a liquid therein; a carriage configured to reciprocate between a first end and a second end; an ejecting head mounted on the carriage and configured to eject liquid droplets; a liquid tank which is mounted on the carriage and is connected to the ejecting head and which is connected to the liquid storage container via a flexible tube; an air supply and discharge unit configured to supply air to the liquid tank and discharge air from the liquid tank; and a pressure controller configured to control an internal pressure of the liquid tank by controlling the air supply and discharge unit, wherein the pressure controller controls the air supply and discharge unit so as to reduce a pressure fluctuation in the internal pressure of the liquid tank generated due to an inertial force applied to a liquid in the tube when the carriage changes a moving direction thereof, wherein the pressure controller controls the air supply and discharge unit to supply air to the liquid tank when the carriage changes the moving direction from toward the one of the first end and the second end to toward the other of the first end and the second end, and wherein the pressure controller controls the air supply and discharge unit to discharge air from the liquid tank when the carriage changes the moving direction from toward the other of the first end and the second end to toward the one of the first end and the second end.