Patent ID: 7249827

Claim:
An ink-jet recording apparatus comprising: an ink-jet head which includes a plurality of ink chambers corresponding to a plurality of nozzles for discharging ink, and a common ink chamber which communicates with each of the plurality of ink chambers to supply the ink to the plurality of ink chambers, said ink-jet head performing image recording by selecting one of the plurality of ink chambers based on printing data and causing a change in volume of the selected ink chamber to discharge the ink from the nozzle corresponding to the selected ink chamber; an ink tank which supplies the ink to the plurality of ink chambers via the common ink chamber; a plurality of sensors which sense ink in the ink tank; and a pressure section which controls a pressure in the plurality of ink chambers in accordance with at least one signal output from the plurality of sensors; wherein the pressure section maintains a negative pressure in the plurality of ink chambers during image recording, and the pressure section applies a positive pressure to the plurality of ink chambers when the ink-jet head is in a left state, wherein the positive pressure is a pressure at which the ink is not discharged from the nozzles; and wherein the left state is initiated when a leaving preparation switch is turned on before turning off a power switch, an ink receiver is positioned below the ink-jet head in the left state, and the ink-jet head is not covered with a cap in the left state.