Laff, Whitesel, Conte & Saret
On-demand type ink-jet print head having an air flow path
 An on-demand type ink-jet printer with a thin cylindrical tip end coaxially projecting into a cylindrical passageway. Ink droplet formation is controlled by a piezoelectric transducer. A stream of air is forced through an annular space formed between the tip end and passageway. The air pressures acting on a meniscus at the tip end is controlled by the position of the tip end within the passageway. A solvent for the ink saturates a porous member surrounding the end of the passageway to control drying of the ink. 
NEC Corporation
B B
B41J B41J
inventional additional
Mitsuo Michihisa
Tsuzuki Suga