Patent ID: 6502927
Filing Date: 2003-01-07
Classification: B41J

Abstract:
An ink jet recording head comprising:a plurality of nozzles constituting a row of nozzles; a plurality of discharge ports for discharging ink, corresponding to said plurality of nozzles, said discharge ports communicating with said nozzles, respectively; energy generating means for generating energy for discharging the ink from the discharge ports; a common liquid compartment in communication with the plurality of nozzles constituting the row of nozzles; a first filter provided at an end of at least one nozzle of the row of nozzles, the end being adjacent to the common liquid compartment; and a second filter that is provided at an end of a nozzle other than the nozzle provided with the first filter and that has a flow resistance lower than that of the first filter, the end being adjacent to the common liquid compartment, wherein the first and second filters each comprise two or more pillars for each nozzle, and wherein the first and second filters differ in respect of the relative sizes of the pillars and gaps between the pillars.