Patent ID: 7735987

Claim:
A liquid-droplet ejecting apparatus comprising: a liquid ejecting head having an ejection opening from which a droplet of a liquid is ejected; a first tank in which a liquid storing chamber and a gas chamber are formed, the liquid storing chamber storing the liquid to be supplied to the liquid ejecting head, and the gas chamber storing a gas; a second tank which stores the liquid to be supplied to the liquid storing chamber of the first tank; a gas-permeable film which closes a communication portion at which the gas chamber and the liquid storing chamber communicate with each other and separates the gas chamber and the liquid storing chamber from each other, the gas-permeable film allowing the gas to pass therethrough but not allowing the liquid to pass therethrough; a suction passage in communication with the gas chamber; a sucking device which sucks the gas from the gas chamber through the suction passage; and a pressure control device disposed in the suction passage, the pressure control device communicating an internal space of the suction passage with an external space of the suction passage when an internal pressure of the suction passage decreases below a threshold lower than the atmospheric pressure due to the sucking of the gas by the sucking device, in order to inhibit the internal pressure of the suction passage from excessively decreasing.