| 摘要 |
PURPOSE:To enable the jetting of fine ink drips by forming an air current toward a recording paper in the perimeter of a nozzle orifice with a thin wall so that the viscosity resistance due to the air current works on an ink extruded from the nozzle orifice under a pressure along the direction of the air current. CONSTITUTION:An orifice 110 of a nozzle 102 is formed extremely thin so as not to exceed 1.5 in the ratio of the outer diameter to the inner diameter of an orifice section and air current flows evenly without generating a large turbulence in the perimeter of the orifice 110 and an ink meniscus 113. As a result, the extrusion of the ink meniscus 113 can be always done stably by a pulse pressure to form a stable ink drip. Since the ink meniscus 113 being extruded receives a force in the direction of being torn from the orifice 110 by a viscosity resistance due to the ambient air current, it flies in ink drips on the air current even when it has not a kinetic energy enough to separate from the orifice 110. |
