Jet drop printer with elements balanced about support plate in nodal plane

An ink jet print head for generating a plurality of jet streams of ink drops, comprising:

• print head support structure,
• a flexible electrically conductive electrode attached to said support structure,
• first and second piezoelectric transducer means positioned on opposite sides of said flexible electrically conductive electrode, respectively,
• fluid reservoir means mounted on said first piezoelectric transducer means, said fluid reservoir means defining an ink receiving manifold therein,
• an orifice plate connected to said reservoir means and, having a plurality of orifices communicating with said manifold, ink streams emerging from said orifices as ink is applied to said manifold,
• a reaction mass mounted on said second piezoelectric transducer means on the opposite side of said flexible electrically conductive electrode from said fluid reservoir means, and
• electrically conductive connector means engaging said reaction mass and said reservoir means and clamping said first and second piezoelectric transducer means and said flexible electrically conductive electrode therebetween, whereby a fluctuating electrical potential placed across each of said first and second piezoelectric transducer means results in mechanical stimulation of said fluid reservoir means and said reaction mass in respective opposite phase relationship, with the flexible electrically conductive electrode means being positioned in a nodal plane therebetween, said stimulation of said fluid reservoir means causing said streams to break up into drops of substantially uniform size and spacing.