US Patent 7273274 Elongate printhead assembly

The present invention relates to an elongate print head assembly. The print head assembly includes an elongate spine defining a plurality of chambers for carrying respective types of ink. The print head assembly also includes a plurality of adjacent print head modules attached to the spine along its length. Each print head module has a plurality of nozzles which, in turn, are each in fluid communication with a respective chamber. The print head modules combine to form a plurality of rows of nozzles along the length of the print head assembly such that, in use, each row expels a respective type of ink.