Ink-jet recording head apparatus
AssigneeHitachi, Ltd.
InventorsMitsuhiro Nakagaki, Osamu Isoo, Shinji Matsuoka, Takahiro Yamada
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Abstract
An ink-jet recording head apparatus of charge modulation and continuous jet type comprising an annular ink pump chamber defined by the inner peripheral face of a cylindrical electrostrictive element, the annular side faces of a pair of elastic sealing members and the outer peripheral face of a fluid passage-providing insert, a tortuous inlet path connecting the ink pump chamber to a supply source of ink under pressure, and a tortuous outlet path connecting the ink pump chamber to an ink ejection orifice.
Claims9
An ink-jet recording head apparatus of charge modulation type comprising a source supplying writing fluid or ink under pressure, a cylindrical electrostrictive element imparting energy to said ink for forming droplets of ink, an orifice for ejecting said ink droplets therefrom, annular sealing members of elastic material making partial engagement with said electrostrictive element for defining an annular ink pump chamber, and a fluid passage-providing member of cylindrical shape supporting said sealing members and defining an inlet path between said ink pump chamber and said ink supply source and an outlet path between said ink pump chamber and said orifice, said ink pump chamber being defined by the inner peripheral face of said cylindrical electrostrictive element, the annular side faces of said sealing members and the outer peripheral face of said fluid passage-providing member.
Dependencies are inferred from the claim text.