Patent ID: 7909434
Filing Date: 2011-03-22
Classification: B41J

Abstract:
1. A printhead defining a scan axis, said printhead having a column of nozzles formed therein wherein a first group of said nozzles is located at a first axial position relative to said scan axis and a second group of said nozzles is located at a second axial position relative to said scan axis so that all nozzles of said column are located at either said first axial position or said second axial position, and wherein the distance along said scan axis between said first axial position and said second axial position is set to substantially minimize dot placement error and such that the first group of said nozzles overlap the second group of said nozzles along an axis perpendicular to said scan axis, wherein said first group of nozzles and said second group of nozzles produce droplets of at least substantially equal drop weights, wherein the distance between the first axial position and the second axial position is such that center points of the first group of nozzles are collinear with edges of the second group of nozzles along the axis perpendicular to the scan axis, and such that center points of the second group of nozzles are collinear with edges of the first group of nozzles along the axis perpendicular to the scan axis, further comprising a firing chamber in fluidic communication with each nozzle and a fluid ejector disposed in each firing chamber, a fluid feed hole, and a feed channel establishing fluidic communication between the fluid feed hole and each firing chamber, wherein the fluid feed hole has an edge extending along the column of nozzles and defines a plurality of cutouts each associated with a nozzle in the same group.