Patent ID: 6362859
Filing Date: 2002-03-26
Classification: B41J

Abstract:
An ink jet recording head for ejecting liquid ink having charged toner particles comprising:a head body; an ink chamber in said head body for receiving a liquid ink containing a plurality of charged toner particles, said ink chamber having a front end, a rear end, an ink inlet port disposed adjacent said rear end, an ink outlet port disposed adjacent said front end, and an ink ejecting slit extending along the front end of said ink chamber; a set of electrodes including (1) a plurality of ejection electrodes arranged within said ink chamber, said plurality of election electrodes having a plurality of tips along said ink electing slit for ejecting the plurality of charged toner particles from said ink chamber, (2) an electrophoretic electrode disposed within said ink chamber and (3) an opposing electrode disposed outside said ink chamber and opposed to said plurality of tips of said plurality of ejection electrodes, said ink inlet port disposed between said electrophoretic electrode and said plurality of tips of said plurality of ejection electrodes; and an ink reservoir, disposed above said ink chamber and connected to said ink inlet port and said ink outlet port, for providing the liquid ink by gravity to said ink chamber through said ink inlet port and for receiving the liquid ink from said ink chamber through said ink outlet port.