Patent ID: 7240986

Claim:
A printer comprising: at least one ink-ejecting mechanism, the at least one ink-ejecting mechanism having a printer head having a print width; a plurality of head chips formed on the printer head; and a plurality of nozzles formed within a plurality of nozzle arrays positioned on a single nozzle plate, the plurality of nozzles associated with each head chip, wherein nozzles associated with one head chip and nozzles associated with an adjacent head chip partly overlap along at least one direction to form an overlapped area on a print object such that when the at least one ink-ejecting mechanism drives across the print object the nozzles of the one head chip and the nozzles of the adjacent head chip respectively eject inks which are mixed in the overlapped area to reduce dot density differences on the print object, wherein the printer head comprises not more than one nozzle plate, wherein the ink-ejecting mechanism is driven such that there is a shiftable boundary in the overlapped area, inks ejected from the one head chip being only on a first side of the shiftable boundary and inks ejected from the adjacent head chip being only on an opposite side of the shiftable boundary.