Ink-supplying device

Claim 1

An ink-jet recording device, comprising a plurality of ink-jetting heads, each having a plurality of orifices able to apply ink to a recording medium simultaneously, a common reservoir for storing ink for jetting by all of said orifices and a system for supplying ink under pressure from said common reservoir to said heads, said system including a plurality of flow paths from said common reservoir to said heads and a plurality of ink-feeding means for pressurizing said flow paths to supply ink from said common reservoir under pressure to said orifices, wherein: each of said flow paths is connected to a respective said head; each of said heads comprises a respective intermediary reservoir for receiving ink from said common reservoir and for supplying the ink of said orifices; and each said flow path has a first pipe and a second pipe connected between said common reservoir and said respective intermediate reservoir, the first pipe being open to said common reservoir, the second pipe having two check valves with the same directional flow, and a respective said ink-feeding means being connected to the second pipe at a point between said check valves for individually pressurizing the second pipes.