| 摘要 |
A projector for a liquid projection device, possibly using a number ofstages, said head comprising a body having a cavity, a nozzle connected tosaid body in such a fashion that the internal space of the discharge tipforms an extension of the cavity of the body and a unit or needle housed insaid cavity and operated in such a way as to be able to displace within saidcavity between a closed position in which one part of the latter or itsextremity prevents passage of the liquid from the cavity to the nozzle and anopen position providing passage of the liquid from the cavity to the nozzle;the cavity, the unit and the internal space being operated relative to oneanother in such a fashion that in the open position the surface of thepassage from the internal space of the nozzle is greater than 30%, preferablygreater than 40% of the surface of the passage from the part of the cavity inwhich the unit is housed. |
