......DE....FRGB..................................R0764529EUROPEAN PATENT APPLICATIONA319970813EP96250175.519960815enenen208863/9519950816JP19970813199733199703261997136 6B 41J 2/06 AdeElektrostatischer TintenstrahlaufzeichnungskopfenElectrostatic ink-jet recording headfrTête d'enregistrement électrostatique à jet d'encre5NEC CORPORATION002366907707/VI-HG/AB7-1, Shiba 5-chome Minato-kuTokyoJPUematsu, Ryosukec/o NEC Corp., 7-1, Shiba 5-chome, Minato-kuTokyoJPSuetsugu, Junichic/o NEC Corp., 7-1, Shiba 5-chome, Minato-kuTokyoJPShima, Kazuoc/o NEC Corp., 7-1, Shiba 5-chome, Minato-kuTokyoJPMinemoto, Hitoshic/o NEC Corp., 7-1, Shiba 5-chome, Minato-kuTokyoJPHagiwara, Yoshihiroc/o NEC Corp., 7-1, Shiba 5-chome, Minato-kuTokyoJPPatentanwälte Wenzel & Kalkoff00100766Grubesallee 2622143 HamburgDEDEFRGB19970813199733

A recording electrode 2 is formed on a base plate 1. A cover member 4 having an ink flow path 3 therein is fixed on the base plate. Color particle is used as ink. A convex portion 12 is formed at a tip end portion of a cover member 4 on an ink ejection side. The convex portion 12 is located at a position projecting beyond a tip end portion of the base plate 1 having the recording electrode 12. An ink meniscus 8 is formed along the convex portion 12 on the cover member side. Thus, a component of an electric field tangent direction in the ink meniscus is directed in the tip end direction of the convex portion 12. The convex portion is sawtoothed to increase the electric field component. As a result, it is possible to rapidly supply the charged color particle to the tip end of the meniscus. At the same time, it is possible to carry out the recording at a high speed with high precision.