Arrangement of discharge openings in a printhead of a multi-colo

Details Arrangement of discharge openings in a printhead of a multi-colo Arrangement of discharge openings in a printhead of a multi-colo

1986-07-18

1988-03-01

Hartary, Joseph W.

Recorders

Markers and/or driving means therefor

With ink supply to marker

400126, G01D 1516

Patent

active

047289686

ABSTRACT:
An arrangement of discharge openings in a printhead of a multi-color ink printer includes n discharge openings for ink droplets of a black color formed in a first vertical row and m discharge openings in each row for ink droplets of further fundamental colors forming further vertical rows. The discharge openings of each row have a spacing "a" and after a first pass of the write head across a recording medium, the recording medium is moved relative to the write head by at least half a print line height, or by half the spacing "a" of the discharge openings. The number of discharge openings n of the first row and the spacing "a" is selected so that characters can be represented in draft quality for a single pass of the write head, the characters being represented in near-letter quality by multiple passes of the write head.

REFERENCES:
patent: 4320406 (1982-03-01), Heinzl
patent: 4511907 (1985-04-01), Fukuchi
patent: 4554556 (1985-11-01), Hirata
patent: 4593295 (1986-06-01), Matsufuji
patent: 4593296 (1986-06-01), Dagna

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