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"Redundant" Dot Technique Improves Quality and Reliability of Drop-on-Demand Inkjet Printing

IP.com Disclosure Number: IPCOM000103089D
Original Publication Date: 1990-Jun-01
Included in the Prior Art Database: 2005-Mar-17
Document File: 1 page(s) / 26K

Publishing Venue

IBM

Related People

Cakerice, LJ: AUTHOR [+2]

Abstract

Disclosed is a drop-on-demand inkjet printing technique in which successive overprinting of single pixel locations with multiple (redundant) ink droplets improves reliability, increases spot size and contrast, and enhances spot "roundness".

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"Redundant" Dot Technique Improves Quality and Reliability of Drop-on-Demand Inkjet Printing

      Disclosed is a drop-on-demand inkjet printing technique in
which successive overprinting of single pixel locations with multiple
(redundant) ink droplets improves reliability, increases spot size
and contrast, and enhances spot "roundness".

      It is apparent that redundant dot printing can be accomplished
by multiple passes of the standard printhead with a single column of
nozzles. A preferred embodiment, however, is a printhead
configuration with multiple columns of nozzles permitting redundant
dot printing with a single pass of the printhead. It is apparent that
with multiple columns of nozzles, printing reliability is improved
since, if one of the nozzles fails, its "partner(s)" continue to
print and data integrity is not compromised.

      Disclosed anonymously.