Patent ID: 9156277
Filing Date: 2015-10-13
Classification: B41J

Abstract:
1. A fluid ejection system comprising a print head unit including a fluid ejection nozzle array, wherein the fluid ejection nozzle array comprises at least a first set of nozzles having nozzles of a first fluid ejection capacity and a second set of nozzles having nozzles of a second fluid ejection capacity and nozzles of a third fluid ejection capacity, wherein the first fluid ejection capacity, the second fluid ejection capacity and the third fluid ejection capacity are different from one another, wherein the nozzles of the first, second and third nominal fluid ejection capacities have different nominal sizes, and further including a printer controller that unbalances the usage of nozzles of the first and second sets with different fluid ejection capacities to generate drops having different drop weights, in a first printing mode, through selection of nozzles of the first and second sets for firing in proportions so that the overall color densities generated by the nozzles of second set when compared to nozzles of the first set are the same in a defined print area.