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

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

2005-05-24

2005-05-24

Nguyen, Lamson D (Department: 2861)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C347S040000

Reexamination Certificate

active

06896357

ABSTRACT:
The present invention provides an ink-jet printing head, and an ink-jet printing apparatus and method which enable high-gradation and high-quality images to be printed using dots of different sizes. In an ink-jet printing head according to the present invention, at least one second nozzle has its center arranged on an imaginary line extending in a main-scanning direction of the printing head through the center of a first nozzle. The volume of an ink droplet ejected through the second nozzle is smaller than that of an ink droplet ejected through the first nozzle. Further, the number of second nozzles is larger than that of first nozzles.

REFERENCES:
patent: 5208605 (1993-05-01), Drake
patent: 6137502 (2000-10-01), Anderson et al.
patent: 6471322 (2002-10-01), Kanda et al.
Patent Abstracts of Japan, vol. 009, No. 051 (M-361), Mar. 6, 1985 (JP 59 187861, Oct. 25, 1984).

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