Liquid jet printing apparatus using a raster of drops to effect

Details Liquid jet printing apparatus using a raster of drops to effect Liquid jet printing apparatus using a raster of drops to effect

1981-03-23

1983-05-17

Schreyer, Stafford D.

Recorders

Record receiver deforming

G01D 1800

Patent

active

043842950

ABSTRACT:
An ink jet array printer in which the printing voltage waveform applied to each raster of drops formed in each printing gun comprises at least two successive sets of voltage levels which each arrange the raster drops in a group in time order of drop formation for each set of voltage levels so that corresponding drops in each of the groups formed in the raster, if charged for printing, have similar differences of voltage level and have similarly spaced print locations in the line section of drops printed by the printing gun. First and second correction voltages are applied to the charging voltage levels, the first to correct for the influence of the preceding drop and the second for the electrostatic and aerodynamic drag forces of a small number of drops influencing the drop being corrected. The set of second correction voltages derived for any particular drop being used also for corresponding drops in the other group(s).

REFERENCES:
patent: 3828354 (1974-08-01), Hilton
patent: 4034379 (1977-07-01), Berry

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