Preventing defective nozzle ink discharge in continuous inkjet printhead from being used for printing

A method, and apparatus for performing the method, are intended to prevent all of the ink discharged from a defective one of multiple nozzles in a continuous inkjet printhead from being used for printing on a print medium. This can be done by periodically heating the defective nozzle at a frequency...

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Bibliographische Detailangaben
Hauptverfasser:	CHWALEK, JAMES M, GARBACZ, GREGORY J
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CORRECTION OF TYPOGRAPHICAL ERRORS i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME LINING MACHINES PERFORMING OPERATIONS PRINTING SELECTIVE PRINTING MECHANISMS STAMPS TRANSPORTING TYPEWRITERS
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Beschreibung
Zusammenfassung:	A method, and apparatus for performing the method, are intended to prevent all of the ink discharged from a defective one of multiple nozzles in a continuous inkjet printhead from being used for printing on a print medium. This can be done by periodically heating the defective nozzle at a frequency that is greater than frequencies other nozzles which are not defective are periodically heated, to cause the defective nozzle to only discharge ink droplets that have a smaller volume (72) than ink droplets (48,52) discharged from the nozzles that are not defective. Then, the smaller volume droplets (72) discharged from the defective nozzle are prevented from reaching a print medium, but the larger volume ink droplets (48) discharged from the nozzles that are not defective are allowed to reach the print medium (56).