Apparatus for stabilizing thermal ink jet printer spot size

Details Apparatus for stabilizing thermal ink jet printer spot size Apparatus for stabilizing thermal ink jet printer spot size

1992-09-10

1994-04-05

Fuller, Benjamin R.

Recorders

Markers and/or driving means therefor

With ink supply to marker

307265, 323313, B41J 205

Patent

active

053009681

ABSTRACT:
A controller controls an ink jet printing apparatus that propels ink jet droplets on demand from a printhead having a plurality of drop ejectors. The printhead includes a plurality of heater elements which are responsive to electrical input signals, each input signal having an amplitude and time duration which produce a temporary vapor bubble and cause a quantity of ink to be ejected for creation of a mark on a copy sheet. The controller has power supply means and delay means that vary the amplitude and duration of the input signals in relation to the printhead temperature.

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