Redundant nozzle dot matrix printheads and method of use

Details Redundant nozzle dot matrix printheads and method of use Redundant nozzle dot matrix printheads and method of use

1994-07-20

1997-06-17

Fuller, Benjamin R.

Incremental printing of symbolic information

Ink jet

Ejector mechanism

347 47, B41J 2145

Patent

active

056401833

ABSTRACT:
A method and apparatus for ink-jet printing provides a redundancy strategy. A number of drop generators within the printhead is added to the standard array, providing redundant orifices in the nozzle plate at the ends of each column of orifices. In operation, the printhead is shifted regularly or pseudo-randomly such that a different set of nozzles prints adjacent swaths or pixels of a swath in multi-pass or multi-dot per pixel printing.

REFERENCES:
patent: 4215350 (1980-07-01), Mielke et al.
patent: 4750009 (1988-06-01), Yoshimura
patent: 4791437 (1988-12-01), Accattino et al.
patent: 4905017 (1990-02-01), Sugitani et al.
patent: 4963882 (1990-10-01), Hickman
patent: 4989016 (1991-01-01), Gatten et al.
patent: 5124720 (1992-06-01), Schantz
patent: 5398053 (1995-03-01), Hirosawa et al.
patent: 5483268 (1996-01-01), Fujimoto
Anonymous, "`Redundant` Dot Technique Improves Quality and Reliability of Drop on Demand Inkjet Printing" RD31434, Jun. 1990.

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