Simultaneously printing with different sections of printheads fo

Details Simultaneously printing with different sections of printheads fo Simultaneously printing with different sections of printheads fo

1997-07-29

1999-05-11

Le, N.

Incremental printing of symbolic information

Ink jet

Ejector mechanism

347 40, B41J2/21;2/145;2/15

Patent

active

059032901

ABSTRACT:
In one embodiment of the invention, a scanning carriage in a color inkjet printer houses three identical color pens for printing cyan, magenta, and yellow. A separate array of nozzles is associated with each color ink. The nozzle arrays are such that they scan over the same print area of the medium during a single scan. To prevent the wet ink from one color swath being deposited over or bleeding into the wet ink from another color swath during the same scan, only a section of each nozzle array is used for printing during a single scan such that wet ink of two different colors cannot overlap during a single scan. This technique reduces ink bleed between colors as well as paper cockle. In another embodiment, a single tricolor pen is used where a single nozzle plate contains three nozzle arrays, one for each color. A section of each nozzle array is used during a single scan, as described above, to prevent wet ink of two different colors from overlapping during a single scan.

REFERENCES:
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patent: 5455610 (1995-10-01), Harrington et al.
patent: 5654744 (1997-08-01), Nicoloff, Jr. et al.

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