초록 ▼

A single or multi-orifice metal nozzle structure suitable for use in an ink jet printing system. The metallic nozzle member has at least one orifice extending therethrough, the orifice including a cylindrical portion, adjacent the outlet face of said nozzle, having a height ranging from 0.25 to 5 ti

A single or multi-orifice metal nozzle structure suitable for use in an ink jet printing system. The metallic nozzle member has at least one orifice extending therethrough, the orifice including a cylindrical portion, adjacent the outlet face of said nozzle, having a height ranging from 0.25 to 5 times its diameter and at least one frustoconical section divergent toward the face opposite the outlet face and communicating with the cylindrical portion. Where the metal nozzle is a multi-orifice metal nozzle, each frustoconical section communicates with a groove disposed in the face opposite the outlet face. The multi-orifice metal nozzle is prepared by grooving a metal plate with at least one groove, punching a plurality of frustoconical sections into the groove member and then forming a cylindrical portion into each frustoconical section and through the plate member.

대표청구항 ▼

In an ink jet printing system of the type wherein ink is delivered to a nozzle member and caused to break into droplets after issuing from the nozzle, a charging electrode is positioned in the region in which the ink jet breaks into droplets and the charging electrode is adapted to respond to data s

In an ink jet printing system of the type wherein ink is delivered to a nozzle member and caused to break into droplets after issuing from the nozzle, a charging electrode is positioned in the region in which the ink jet breaks into droplets and the charging electrode is adapted to respond to data signals selectively to charge the droplets as they are formed, the improvement comprising: a metallic nozzle member less than about 1000 microns thick provided with an orifice extending therethrough, said orifice including a cylindrical portion adjacent the outlet face of said nozzle having a height ranging from about 0.25 to 5 times its diameter and at least one frustoconical section divergent toward the face opposite said outlet face and communicating with said cylindrical portion, said frustoconical section and said cylindrical portion having a meeting angle of less than about 60 degrees.