Patent ID: 6428134
Filing Date: 2002-08-06
Classification: B41J,H04N

Abstract:
A pinter capable of reducing ink volume variability, comprising:(a) a print head; (b) at least one nozzle integrally attached to said print head, said nozzle having an ink chamber therein capable of ejecting a plurality of ink droplets therefrom, the chamber producing ink droplets each of a non-nominal volume; (c) a waveform generator connected to said nozzle for generating an electronic waveform to be supplied to said nozzle, so that said nozzle ejects the ink droplet in response to the waveform supplied thereto, the waveform being defined by an electronic waveform having a plurality of pulses controlling ink droplet volume; (d) a controller connected to said nozzle for transmitting the electronic waveform to said nozzle to eject the ink droplet so as to compensate for the non-nominal volume by controlling the number of pulses in the waveform, so that the at least one chamber produces an ink droplet of nominal volume; and (e) a look-up table associated with said nozzle for storing values of number of pulses associated with said nozzle.