Ink-jet printing apparatus and ink-jet printing method

Details Ink-jet printing apparatus and ink-jet printing method Ink-jet printing apparatus and ink-jet printing method

2005-12-20

2005-12-20

Nguyen, Thinh (Department: 2861)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C347S016000

Reexamination Certificate

active

06976747

ABSTRACT:
Printing is performed by scanning a printhead unit in which the first nozzle array on which a plurality of nozzles for discharging the first ink are arrayed and the second nozzle array on which a plurality of nozzles for discharging the second ink are arrayed on a printing medium in a direction crossing to a direction of the nozzle array, the first and second nozzle arrays are arranged side by side in the direction crossing to the direction of the nozzle array so as to locate the first nozzles at the same position in a printing medium convey direction, and the number of nozzles of the second nozzle array is twice or more the number of nozzles of the first nozzle array. At this time, an image is printed by using as a unit a combination of a plurality of first printing/scanning operations of printing by discharging the first ink using only the first nozzle array, a plurality of convey operations of the printing medium by a distance corresponding to the length of the first nozzle array, and one second printing/scanning operation of printing by discharging the second ink using only the number of nozzles of the second nozzle array which is a multiple of the number of nozzles of the first nozzle array. Even an image in which regions to be printed by different inks are adjacent to each other can be printed at a high speed and high quality.

REFERENCES:
patent: 5455610 (1995-10-01), Harrington
patent: 5512923 (1996-04-01), Bauman
patent: 5767876 (1998-06-01), Koike et al.
patent: 5821957 (1998-10-01), Berge et al.
patent: 5903290 (1999-05-01), Nicoloff et al.
patent: 6086185 (2000-07-01), Inui et al.
patent: 6-210877 (1994-08-01), None

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