Evaporation Barrier for Ink Jet Nozzle
Original Publication Date: 1985-May-01
Included in the Prior Art Database: 2005-Feb-18
In ink jet printing, droplets of ink are released from the nozzle. In order to have proper printing, it is necessary that there not be excess drying of ink at the exit of the ink jet nozzle. In order to avoid this, solvent evaporation is prevented by creating a zone of solvent-saturated air close to the nozzle orifice. The principal of this technique is the creation of a stagnant zone close to the nozzle orifice, where the air zone is nearly saturated with the ink solvent. This prevents excess solvent evaporation at the nozzle opening, and therefore prevents excess drying of the ink at the exit of the nozzle. The nozzle plate 10 contains a nozzle orifice 12, through which ink 14 is delivered for printing in the form of ink drop 16.