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An ink jet drop-on-demand print head comprises a plurality of tubular piezoelectric transducers each having two electrodes formed by an electrically conducting coating. A housing member holds the transducers in a position which includes at least one row of transducers. A substrate includes a plurali

An ink jet drop-on-demand print head comprises a plurality of tubular piezoelectric transducers each having two electrodes formed by an electrically conducting coating. A housing member holds the transducers in a position which includes at least one row of transducers. A substrate includes a plurality of electrical conductors, and the substrate is positioned so that each electrical conductor is adjacent one of the electrodes. A resilient connector means is provided which is not conductive along its length but is conductive across its width, and the connector means is positioned to make contact with a selected one of the electrical conductors and only one of the electrodes of one of the transducers. In a specific embodiment, the substrate comprises a flat conductor cable, and in a second embodiment the substrate comprises a printed circuit board.

대표청구항 ▼

An ink jet drop-on-demand print head comprising: a plurality of tubular piezoelectric transducers each having a first and a second separate electrically conducting coating formed thereon; a mounting member for holding said transducers in a spaced apart position; a substrate having a conductor patter

An ink jet drop-on-demand print head comprising: a plurality of tubular piezoelectric transducers each having a first and a second separate electrically conducting coating formed thereon; a mounting member for holding said transducers in a spaced apart position; a substrate having a conductor pattern including a plurality of separate electrical conductors thereon and means for mounting said substrate in a fixed position adjacent a plurality of said transducers; a resilient connector means that is not electrically conductive along one dimension but is electrically conductive across other dimension; and means for positioning said connector means in a fixed position relative to said transducers and said substrate so that an electrical oonnection is made between one of said conductive coating on each of said plurality of transducers and one of the circuit patterns on said substrate so that each of said transducers can be selectively energized to produce one drop of ink each time the transducer is energized.