Ejection head, image forming apparatus and image forming method

Details Ejection head, image forming apparatus and image forming method Ejection head, image forming apparatus and image forming method

2005-06-28

2010-06-08

Nguyen, Lamson D (Department: 2861)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C347S068000

Reexamination Certificate

active

07731332

ABSTRACT:
The ejection head comprises: n (where n is an integer not less than 2) pieces of ejection aperture groups arranged in a sub-scanning direction, each of the groups including ejection aperture rows arranged at prescribed intervals in a main scanning direction, each of the ejection aperture rows including a plurality of ejection apertures aligned in an oblique direction with a prescribed angle θ (where 0°<θ<90°) with respect to the main scanning direction, wherein: the ejection aperture groups are arranged in such a manner that phases of the ejection aperture groups disposed adjacently in the sub-scanning direction are varied in the main scanning direction so that, in projected ejection aperture rows that are obtained by projecting the ejection apertures of each of the ejection aperture groups to dispose the ejection apertures in the main scanning direction, one of the ejection apertures in one of the groups arranged adjacently in the sub-scanning direction is located between the adjacent ejection apertures in the other of the ejection aperture groups.

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