Mixed-density print masking in a mixed-swath-height printer

Details Mixed-density print masking in a mixed-swath-height printer Mixed-density print masking in a mixed-swath-height printer

1997-11-05

2000-01-25

Le, N.

Incremental printing of symbolic information

Ink jet

Ejector mechanism

B41J 2145

Patent

active

060171138

ABSTRACT:
At least two different pixel densities are used for different printing devices--such as inkjet pens--that operate concurrently, or different printing steps that proceed concurrently, to produce respective image swaths in a single, pixel-based printing machine. The different print devices or steps produce image swaths of respective different swath heights. In one form of the invention, the taller-swath-height printing device operates at lower pixel density, spreading its colorant over a greater area while printing-medium advance keeps pace with operation of the shallower-swath-height printing device. This procedure allows more drying and penetrating time for the colorant applied by the taller-swath device, thereby improving print attributes such as bleed, offset, cockle, curl, overall drying time and throughput. In another form of the invention the taller-swath device operates at higher pixel density, providing physical and temporal separation of colorant application from the two printing devices--to avoid adverse interfering effects between reactive inks.

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patent: 5455610 (1995-10-01), Harrington
patent: 5512923 (1996-04-01), Bauman
patent: 5684517 (1997-11-01), Clemente et al.

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