초록 ▼

Liquid jet printer apparatus and method includes the purposeful addition of random acoustic vibrations to the system so as to reduce adverse printing effects otherwise caused by standing acoustic waves along the length of an orifice array. As a result, a longer cross-machine dimension for the printe

Liquid jet printer apparatus and method includes the purposeful addition of random acoustic vibrations to the system so as to reduce adverse printing effects otherwise caused by standing acoustic waves along the length of an orifice array. As a result, a longer cross-machine dimension for the printer orifice array is made practical as may be required, for example, for some textile applications.

대표청구항 ▼

Apparatus for randomly generating liquid droplets and for selectively applying such liquid droplets to a moving substrate surface, said apparatus comprising: a source of pressurized liquid; an array of spaced apart liquid jet orifices extending in a cross-machine direction transverse to the directio

Apparatus for randomly generating liquid droplets and for selectively applying such liquid droplets to a moving substrate surface, said apparatus comprising: a source of pressurized liquid; an array of spaced apart liquid jet orifices extending in a cross-machine direction transverse to the direction of movement of said substrate surface, each of said orifices being in fluid communication with said source of pressurized fluid; random signal generation means including a random signal generator driving an electro-acoustic transducer acoustically coupled to said liquid for actively inducing random drop formation processes in fluid streams issuing from said orifices in a manner substantially independent of the cross-machine dimension by substantially avoiding stationary standing acoustic waves or other phenomena associated with regular periodic perturbations that would, if regular periodic perturbations were used, limit the maximum cross-machine dimension; charging electrode means disposed downstream of said orifices and extending over the zone of random drop formation for selectively imparting electrical charges to said drops as they are randomly formed; and deflection electrode means disposed downstream of said charging electrode means for deflecting electrically charged droplets away from the substrate surface.