Patent ID: 6227652
Filing Date: 2001-05-08
Classification: B41J

Abstract:
An ink jet printing nozzle apparatus comprising:(a) a nozzle chamber having an ink ejection port at one end;(b) a plunger constructed from soft magnetic material and positioned between said nozzle chamber and an ink chamber, said plunger having a cavity formed therein, said ink chamber allowing for a supply of ink to said nozzle chamber, said plunger further having a series of fluid release apertures allowing for the expulsion of fluid under pressure in said cavity;(c) an electric coil located substantially within said plunger cavity and electrically connected to a nozzle activation signal wherein upon activation of the activation signal, said plunger is caused by said coil to move from an ink loaded position to an ink ejection position thereby causing the ejection of ink from said ink ejection port, said fluid release apertures allowing for the expulsion of fluid under pressure in said cavity.