Patent ID: 7325906
Filing Date: 2008-02-05
Classification: B41J

Abstract:
1. An ink jet head for ejecting ink in a form of an ink droplet to fly the ink droplet toward a recording medium, comprising: an ejection orifice substrate in which an ejection orifice adapted to eject therefrom the ink is bored; a head substrate disposed at a predetermined distance from said ejection orifice substrate to define an ink passage between said ejection orifice substrate and said head substrate; ejection control means for controlling the ejection of the ink from said ejection orifice; an ink guide dike provided on a surface of said head substrate on a side of said ink passage to form an ink flow directed from an upstream side of said ejection orifice in said ink passage to said ejection orifice; and an ink guide projection disposed on said head substrate so as to extend through a central portion of said ejection orifice with its tip being directed in a direction of the ejection of the ink, wherein said ink guide dike is provided so as to contact said ink guide projection.