Incremental printing of symbolic information – Ink jet – Ejector mechanism
Patent
1998-09-02
2000-11-14
Nguyen, Thinh
Incremental printing of symbolic information
Ink jet
Ejector mechanism
347100, B41J 221
Patent
active
061459615
ABSTRACT:
An ink-jet head assembly includes a plurality of ink-jet heads that are fixed mutually. A first ink-jet head has a plurality of deep cyan nozzles and a plurality of deep magenta nozzles, whereas a second ink-jet head has a plurality of light cyan nozzles and a plurality of light magenta nozzles. The plurality of nozzles of the respective inks are positioned in such a manner that the plurality of nozzles of an identical color and an identical density are arrayed substantially along a sub-scanning direction and that neither the nozzles of different colors nor the nozzles of different densities are located on an identical straight line extending in the sub-scanning direction. The respective one nozzles of deep cyan ink, deep magenta ink, light cyan ink, and light magenta ink are positioned to be aligned in a straight line extending in a main scanning direction. Even when the number of nozzles is increased, this arrangement effectively prevents deterioration of the picture quality due to misalignment of dot formation positions in the main scanning direction and facilitates manufacture of the ink-jet heads.
REFERENCES:
patent: 5742306 (1998-04-01), Gompertz et al.
patent: 5825377 (1998-10-01), Gotoh et al.
Nguyen Thinh
Seiko Epson Corporation
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