Ink jet head and ink jet printer

Details Ink jet head and ink jet printer Ink jet head and ink jet printer

2006-07-18

2006-07-18

Nguyen, Lamson (Department: 2861)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C347S043000

Reexamination Certificate

active

07077500

ABSTRACT:
An ink jet head is provided with a plurality of nozzle arrays formed by many numbers of ink nozzles for discharging large-amount ink droplets and small-amount ink droplets. Although the ink jet head generates heat more on the middle portion thereof, it is cooled by discharges of ink droplets. The degree of cooling is greater by the large-amount ink droplets to be discharged. Thus, on the first column in the main scan direction, the small-amount nozzle array is positioned, and on the second column, the large-amount nozzle array is positioned. In this way, it is made possible to balance the temperature distributions in the main scan direction. As a result, color images can be formed in high quality.

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*Note: U.S. counterpart, patent application Publication No. 2002/0008729 A1, also submitted.

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