Resonance Parity in Multi-Nozzle Impulse Ink Jet Print Heads
Original Publication Date: 1984-Nov-01
Included in the Prior Art Database: 2005-Feb-05
A method and apparatus is described for matching the acoustic length and reflection characteristics of the fluid channels in a multi-nozzle drop-on-demand (DOD) ink jet print head. In impulse or DOD ink jet printheads, the acoustic resonance and reverberation characteristics of the pressure wave within the ink channel can have a significant effect on the printing performance. The frequency at which this resonance behavior occurs depends primarily on the fluid channel length which is defined by the acoustic boundaries. The location of these boundaries is associated with sudden changes in the acoustic properties which may include a change in fluid channel cross-sectional area or directionality and/or material discontinuities.