Methods and apparatus for thermal fluid jet drop volume control using variable length pre-pulses

A method and apparatus are providing for controlling the drop volume of a thermal fluid jet fluid ejecting head. The fluid ejecting head has a plurality of drop ejectors, each of the plurality of drop ejectors has a heating element activated in response to input signals to eject an ink droplet from...

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Bibliographische Detailangaben
Hauptverfasser:	MARKHAM ROGER G, FREIRE EDUARDO M, SLOWIK JOHN H, YEH ANDREW S, RHODES WILLIAM P
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL CORRECTION OF TYPOGRAPHICAL ERRORS i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME LINING MACHINES PERFORMING OPERATIONS PRINTING SELECTIVE PRINTING MECHANISMS SPRAYING OR ATOMISING IN GENERAL STAMPS TRANSPORTING TYPEWRITERS
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Beschreibung
Zusammenfassung:	A method and apparatus are providing for controlling the drop volume of a thermal fluid jet fluid ejecting head. The fluid ejecting head has a plurality of drop ejectors, each of the plurality of drop ejectors has a heating element activated in response to input signals to eject an ink droplet from the fluid ejecting head. The method includes the steps of applying a plurality of print signals to the fluid ejecting head, the plurality of print signals corresponding to an image for the fluid jet assembly to create, applying at least two pre-pulse signals of different duration to the fluid ejecting head, and using the at least two pre-pulse signals and the plurality of print signals to activate the heating elements so that a desired drop volume results.