Patent ID: 9352595
Filing Date: 2016-05-31
CPC Classification: B41J

Claim Text:
1. An image forming apparatus comprising: a head having a plurality of nozzles which liquid can be ejected onto a medium; a scanning section moving the head in a main-scanning direction; and a transport section that transports the medium in a sub-scanning direction intersecting the main-scanning direction, wherein a first region is formed in the head between a nozzle formed at a first end of the head and a first nozzle that is a first predetermined distance away from the nozzle formed at the first end in the sub-scanning direction, a second region is formed in the head between a nozzle formed at a second end of the head and a second nozzle that is a second predetermined distance away from the second end in the sub-scanning direction, and when the head, the scanning section, and the transport section form an image on the medium, a moving-average nozzle usage ratio within a region between the first region and the second region changes at a lower rate than moving-average nozzle usage ratios within the first region and the second region.