Question

What are inkjet printers? explain their working.

Answer 1

Inkjet printer is a computer peripheral that produces hard copy by spraying ink onto paper.

Working:

Ink from supply is forced put out of a small nozzle and breaks up into extremely small droplets during their flight. These droplets pass through twoelectrical components

(i)     a “ Charging Electrode”     and      (ii)    Deflection plates

When the print head moves over regions of the paper which are not to be inked, the charging electrode is left on and goes the ink droplets a net charge. Deflecting plates divert such charged drops into a gutter and in this way such drops are not able to reach the paper.

Whenever ink is to be placed on the paper, the charging control, responding to computer, turns off the charging electrode. These uncharged droplets fly straight through the deflection plates and strike the paper.

Inkjet printer can also produce color copies. A full color print heads use at least three nozzles for different colors and nozzles for black ink by adjusting the amount of ink that each nozzle produces, the print head can deposit any color on paper.