Patent ID: 7931351

Claim:
A printhead for an inkjet printer, the printhead comprising: a wafer assembly defining spaced apart groups of ink supply channels; and groups of ink ejection nozzle arrangements extending from the wafer assembly and in fluid communication with respective ink supply channel groups, each group of ink ejection nozzle arrangements comprising a pair of rows of ink ejection nozzle arrangements, wherein each nozzle arrangement includes an ink ejection head from which an actuator tail extends, each pair of rows of ink ejection nozzle arrangements are arranged such that the ink ejection heads of the ink ejection nozzle arrangements in a first row of the pair face toward and are adjacent to the ink ejection heads of the ink ejection nozzle arrangements in a second row, and each group of nozzle arrangements comprises an ink spread restriction wall extending from the wafer assembly to border the pair of ink spread restriction pits.