Ink jet head

Details Ink jet head Ink jet head

2007-12-18

2011-12-06

Nguyen, Lamson (Department: 2861)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

Reexamination Certificate

active

08070256

ABSTRACT:
An ink jet head includes (A) a first black nozzle column having a plurality of nozzles arranged at a predetermined pitch in a transportation direction of a medium and discharging black ink, (B) a second black nozzle column having a plurality of nozzles arranged at the predetermined pitch in the transportation direction and located at positions shifted from the plurality of nozzles of the first black nozzle column in the transportation direction and discharging the black ink, and (C) a color nozzle column having a plurality of nozzles arranged at the predetermined pitch in the transportation direction and located at the same positions as the plurality of nozzles of the second black nozzle column in the transportation direction and discharging different colors of ink from different groups of nozzles thereof, each group including a predetermined number of nozzles consecutively disposed in the transportation direction.

REFERENCES:
patent: 5376958 (1994-12-01), Richtsmeier et al.
patent: 6533392 (2003-03-01), Koitabashi
patent: 6688727 (2004-02-01), Otsuki
patent: 11-028827 (1999-02-01), None
patent: 2001-162841 (2001-06-01), None
patent: 2001-328281 (2001-11-01), None
patent: 2004-106522 (2004-04-01), None
patent: 2005-246643 (2005-09-01), None
patent: 2006-089735 (2006-04-01), None

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