array 10 extends the entire printing width of the printer the nozzle array 10 is formed by five elongate printhead integrated circuits ics 9 arranged end to end each of the printhead ics 9 prints ink from all the cartridges 7 the nozzles array 10 is arranged into nozzle rows 11 extending transverse to the media feed direction see fig3 and 5 each row 11 is dedicated to one color and each color supplies at least one row 11 in the nozzle array 10 the media substrate 4 fig1 is not indexed slowly past the printhead as it is with scanning printhead printers accordingly media feed speeds are substantially increased which permits much higher print speeds fig3 is a schematic section view of the printhead 2 printing ink droplets 18 onto a sheet media substrate 4 moving along a media feed direction 12 the space between the printhead ics 9 and the media substrate 4 is referred to as the print gap 16 the fast moving media substrate 4 creates an air flow 13 through the print gap 16 this air flow interacts with the ejection of ink droplets 18 to form an upstream vortex 14 immediately upstream of the droplets 18 and a downstream vortex 15 immediately downstream of the droplets 18 under certain conditions the vortices 14 and 15 can oscillate 17 and cause misdirection of the ink droplets 18 a typical response of droplet placement over time is shown in fig4 as shown in fig5 the oscillation of the vortices 14 and 15 has been removed or substantially reduced by using a paper feed roller 20 as an air flow generator to generate an additional.