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Presentation
2.2 Continuous deviated ink jet printing
The printer head is supplied with pressurized ink.
The ink arrives in a cannon (2) with a hole ("nozzle") (3) through which the ink is ejected to form
ajet.
The ink jet is modulated by a piezo-electric resonator (1) to form calibrated and equidistant
droplets. The droplets not used for printing are recuperated in a gutter (6) to be reused.
The droplets used for printing are polarized electrically by a charge electrode (4) and then
deflected from their initial path by two deflector plates (5) to produce the required symbol. The
deflection of a droplet depends on its polarization value.
The droplets are projected onto the item to be printed. A character is formed trame by trame; these
trames may be full, partial or empty. Moving the object perpendicularly to the deflection plane
enables the trames to be offset from each other.
Figure 1
Object movement
Drop deflection
1
2
3
4
5
6
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