Ink jet printer

Details Ink jet printer Ink jet printer

1995-12-01

1998-05-19

Fuller, Benjamin R.

Incremental printing of symbolic information

Ink jet

Ejector mechanism

347 40, B41J 221, B41J 2145, B41J 215

Patent

active

057541981

ABSTRACT:
An ink jet printer comprises a plurality of multi-nozzle array ink jet print heads arranged in a sub-scanning direction in which recording paper is sent. The ink jet print heads are arranged for scanning forward and backward in a main scanning direction to record different color ink onto the recording paper, and each of the ink jet print heads has a nozzle unit including a plurality of nozzle portions. The plurality of nozzle portions are arranged to jet a predetermined ink to the recording paper sent in the sub-scanning direction every time the forward scanning and the backward scanning are performed so as to form a stripped scanning printed area on the recording paper corresponding to a scanning width in the sub-scanning direction of each of the nozzle units of the ink jet print heads. The ink jet print heads are structured to satisfy W<P<2W, where P is an array pitch of the ink jet print heads, and W is the scanning width in the sub-scanning direction of each of the nozzle units of the ink jet print heads. In addition, the array pitch P substantially satisfies W (1+(1/N')), where N' corresponds to one of (i) a number of heads of basic color ink and (ii) a number of heads of all colors.

REFERENCES:
patent: 4528576 (1985-07-01), Koumura et al.
patent: 4812859 (1989-03-01), Chan et al.
patent: 5359355 (1994-10-01), Nagoshi et al.

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