Continuous stream binary array ink jet print head

Details Continuous stream binary array ink jet print head Continuous stream binary array ink jet print head

2006-04-25

2006-04-25

Feggins, K. (Department: 2861)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

Reexamination Certificate

active

07033003

ABSTRACT:
A continuous stream binary array ink jet print head includes an elongate cavity for containing ink and an array of nozzle orifices formed so as to extend through a wall of the cavity for passing the ink from the cavity to form jets. The nozzle orifices extend along the length of the cavity. The cavity is divided up along its length by at least one internal wall thereby to create a plurality of sub-cavities substantially acoustically isolated from one another and to divide up the array of nozzle orifices between the sub-cavities such that each sub-cavity communicates with one or more of the nozzle orifices of the array. One or more actuators associated with each sub-cavity cyclically varies the dimensions of the sub-cavity thereby to cause the or each jet emanating from the nozzle orifice(s) of that sub-cavity to break up into ink droplets at a predetermined distance therefrom. The droplets of each jet are selectively electrically charged and deflected. A gutter is provided for collecting droplets not used in printing. The droplets of each jet used in printing travel along the same path to print.

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