Image forming apparatus

Details Image forming apparatus Image forming apparatus

2011-07-12

2011-07-12

Gray, David M (Department: 2852)

Electrophotography

Diagnostics

Consumable

C399S009000, C399S036000, C399S163000, C399S167000

Reexamination Certificate

active

07978987

ABSTRACT:
In an image forming apparatus, an image forming portion forms an image on a rotator. A storage portion stores change characteristics information relevant to correction parameters corresponding to phase points of the rotator. A designating portion sequentially designates the correction parameters based on the change characteristics information. A correcting portion corrects an image forming position on the rotator based on the correction parameter designated by the designating portion. When it is determined, based on a detecting phase point of the rotator detected by a detecting portion, that the current phase of the rotator corresponds to a gradual phase point at which the correction parameter changes at a rate equal to or lower than a predetermined value, the designation by said designating portion is shifted to the correction parameter corresponding to the gradual phase point.

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