Incremental printing of symbolic information – Ink jet – Ejector mechanism
Reexamination Certificate
2005-01-04
2005-01-04
Nguyen, Thinh (Department: 2861)
Incremental printing of symbolic information
Ink jet
Ejector mechanism
C347S015000
Reexamination Certificate
active
06837571
ABSTRACT:
A color ink-jet printer including a first ink ejecting portion operable to eject droplets of a first ink of a first color, a second ink ejecting portion operable to eject droplets of a second ink of a second color other than the first color, which second ink is dried at a higher rate than said first ink, a first control portion operable to control the first ink ejecting portion, on the basis of a gray-scale value at a picture element corresponding to each dot of the first ink to be formed on a recording medium, such that a total volume of at least one droplet of the first ink ejected by the first ink ejecting portion to form each dot of the first ink is equal to any one of a plurality of different total volume values, and a second control portion operable to control the second ink ejecting portion, on the basis of a gray-scale value at a picture element corresponding to each dot of the second ink to be formed on the recording medium, such that a total volume of at least one droplet of the second ink ejected by the second ink ejecting portion to form each dot of the second ink is equal to one of the different total volume values, which is other than a smallest one of the different total volume values except a zero value which does not cause ejection of any ink droplet from the second ink ejecting portion.
REFERENCES:
patent: 5801838 (1998-09-01), Larson
patent: 6024438 (2000-02-01), Koike et al.
patent: 6416149 (2002-07-01), Takahashi
patent: 6682170 (2004-01-01), Hotomi et al.
patent: 6702416 (2004-03-01), Vanhooydonck
Brother Kogyo Kabushiki Kaisha
Nguyen Thinh
Reed Smith LLP
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