High density ink jet printhead with double-U channel actuator

An ink jet printhead, comprising:

• a lower body part formed from a piezoelectric material, said lower body part having a base section and a plurality of generally parallel spaced projections extending longitudinally along said base section and upwardly therefrom, each of said projections having a top side;
• an upper body part formed from a piezoelectric material, said upper body part having a top section and a corresponding plurality of generally parallel spaced projections extending longitudinally along said top section and downwardly therefrom, each of said projections having a bottom side;
• said top sides of said lower body projections and said bottom sides of said corresponding upper body projections mounted together to define a plurality of generally parallel, axially extending ink-carrying channels from which ink may be ejected therefrom;
• and
• a corresponding plurality of strip-shaped sections of a layer of conductive adhesive, each of said strip-shaped sections conductively mounting one of said projections of said lower body part to said corresponding one of said projections of said upper body part.

An ink jet printhead, comprising:

• a lower body part formed from a piezoelectric material, said lower body part having a base section and a plurality of generally parallel spaced projections extending longitudinally along said base section and upwardly therefrom, each of said projections having a top side;
• and
• an upper body part formed from a piezoelectric material, said upper body part having a top section and a corresponding plurality of generally parallel spaced projections extending longitudinally along said top section and downwardly therefrom, each of said projections having a bottom side;
• said top sides of said lower body projections and said bottom sides of said corresponding upper body projections conductively mounted together to define a plurality of generally parallel, axially extending ink-carrying channels from which ink may be ejected therefrom;
• wherein each of said ink-carrying channels is defined by a pair of adjacent lower body projections, a segment of said bottom section between said pair of adjacent lower body projections, a corresponding pair of adjacent upper body projections, a segment of said top section between said pair of adjacent upper body projections and first and second strip-shaped sections of a layer of conductive adhesive which mount each of said pair of lower body projections to the corresponding one of said pair of upper body projections.

An ink jet printhead, comprising:

• a first generally U-shaped actuator having first and second top walls;
• a second generally U-shaped actuator having first and second bottom walls conductively mounted to said first and second top walls of said first generally U-shaped actuator;
• means for generating a first electric field which extends from said first top wall of said first U-shaped actuator to said second top wall of said first U-shaped actuator;
• and
• means for generating a second electric field which extends from said first bottom wall of said second U-shaped actuator to said Second bottom wall of said second U-shaped actuator;
• wherein said first and second generally U-shaped actuators define a elongated liquid confining channel.

An ink jet printhead, comprising:

• a first generally U-shaped actuator having first and second top walls;
• a second generally U-shaped actuator having first and second bottom walls;
• a first strip of conductive adhesive for conductively mounting said first top wall of said first U-shaped actuator to said first bottom wall of said second U-shaped actuator;
• and
• a second strip of conductive adhesive for conductively mounting said second top wall of said second U-shaped actuator to said second bottom wall of said second U-shaped actuator;
• wherein said first and second generally U-shaped actuators define a elongated liquid confining channel.