Drop-on-demand printhead

Abstract From the Canadian patent

Drop-on-Demand Printhead, A drop-on-demand ink drop jet printhead comprises layers of like print modules of which adjacent layers are equally laterally offset. The modules are formed each with a row of parallel equally spaced ink drop ejectors arranged in one or more groups. The ejector groups in each layer are laterally spaced by the same amount and corresponding segments of the groups in different layers are together capable of depositing drops of ink in a particular segment of the print line at a density equal to the product of the drop density capability of each group and the number of groups having segments corresponding to the associated print line segment.