Patent ID: 7946671

Claim:
A photo printer for printing 6″×4″ photos comprising: a stationary printhead, said printhead comprising a plurality of color channels, each color channel comprising at least one nozzle row extending along the length of said printhead, each nozzle in a color channel being fluid communication with a respective ink chamber for holding a quantity of the same colored ink, each of the ink chambers having an actuator for generating a pressure pulse in the quantity of ink held in the ink chamber such that a droplet of ink is ejected through the nozzle; and, means for continuously moving 6″×4″ paper sheets past said printhead for printing of about 10,000 lines of printing on each paper sheet; wherein, for one line of printing, all selected firing nozzles of each color channel of the printhead are operated so that each line of printing is printed within about 200 microseconds.