Patent ID: 7654656

Claim:
An ink jet recording apparatus comprising: a plurality of main tanks for storing ink; a recording head that is provided with a plurality of sub-tanks each for storing the ink supplied from each main tank and that selectively ejects the ink in each sub-tank through an ejection nozzle and thereby records an image onto a recording medium; a pressurization section for pressurizing the ink in said main tanks and thereby supplying the ink in said main tanks to said sub-tanks; a switching unit for applying the pressure from said pressurization section selectively onto the plurality of main tanks; a plurality of tubes each for connecting each main tank to said switching unit; and a pressing mechanism comprising: a shaft that intersects with said plurality of tubes; and protrusions each formed on the surface of said shaft in a manner opposing each tube, wherein said switching unit selectively applies the pressure onto the plurality of main tanks by means of the pressing mechanism for individually pressing said plurality of tubes.