Incremental printing of symbolic information – Ink jet – Fluid or fluid source handling means
Patent
1997-06-03
2000-10-31
Barlow, John
Incremental printing of symbolic information
Ink jet
Fluid or fluid source handling means
347100, B41J 217, G01D 1100
Patent
active
061391395
ABSTRACT:
Described is a color inkjet printer for optimum bleed prevention in a printer utilizing multiple black and color pens wherein there is provided one print cartridge for dispensing black ink onto the printing medium and at least one print cartridge for dispensing color ink onto the printing medium. The cartridge for dispensing black ink contains an ink with little or no surface active agent while the cartridge for dispensing color ink contains a sufficient amount of surface active agent to reduce bleed between the colors. Moreover, the cartridge for dispensing black ink contains an ink which reacts with at least one and more preferably all inks contained in the cartridge for dispensing color ink. This reaction reduces bleed on images where the black print is adjacent to the color print to an acceptable level without requiring the black ink to contain surface active agents that would lead to inferior quality black text on the plain paper print medium. The reaction may be initiated by pH changes, reaction between the actual colorants, or reaction between one of the colorants and a component in the other ink.
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Adamic Raymond J.
Choy Mark L.
Hickman Mark S.
Shields James P.
Stoffel John L.
Barlow John
Brooke Michael S
Hewlett--Packard Company
Stenstrom Dennis G.
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