Printhead, scanning type inkjet image forming apparatus...

Details Printhead, scanning type inkjet image forming apparatus... Printhead, scanning type inkjet image forming apparatus...

2006-05-22

2009-12-29

Nguyen, Thinh H (Department: 2861)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C347S041000, C347S049000

Reexamination Certificate

active

07637590

ABSTRACT:
A printhead, a scanning type inkjet image forming apparatus having the same, and a method of performing a printing operation with a high resolution. Separate N nozzle units are disposed in the printhead such that images can be printed with higher resolution. In addition, the printing operation can be performed with an actual resolution or a higher resolution while a print medium is fed at a uniform speed such that the printing speed can be increased when the printing operation is performed with the higher resolution. In addition, when a portion of nozzles of a first nozzle unit is damaged or is malfunctioning, the portion of the nozzles is compensated for using a second nozzle unit such that an image quality is not affected by a defective nozzle.

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Korean Office Action dated Jul. 25, 2006 issued in KR 2005-44464.

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