Printhead orifice grouping

摘要

An ink jet printhead (14) comprising: a substrate (20); a barrier/orifice structure (28) supported by the substrate and defining an array of nozzles (62A-62N,72A-72N) arranged in a plurality of nozzle columns (60,70) and an array of firing chambers (64A-64N,74A-74N) in correspondence with correspondence with the array of nozzles; the nozzles comprising each column of the array arranged in subgroups of nozzles, each subgroup comprising at least two nozzles (62A-62B...), each subgroup fed with liquid ink through a corresponding ink flow path (65,75) isolated from other nozzles of the array by the barrier layer/orifice structure.