Patent ID: 7190384
Filing Date: 2007-03-13
Classification: B41J

Abstract:
1. An image forming apparatus having a recording head, said recording head recording an image on a recording material which is fed by a feed roller pair driven by a motor, said image forming apparatus comprising; a density measuring sensor for measuring density of a test print, said test print being recorded by said recording head; first creating means for creating a density profile with respect to a feeding direction of said recording material based on the measurement result of said density measuring sensor; extracting means for extracting density unevenness from said density profile, and then obtaining a relationship between a rotating position of said motor and the amount of density variation to said density unevenness in one period, said density unevenness changing periodically; second creating means for creating a speed control profile on said density unevenness in one period so as to increase or decrease the speed of said motor in response to said amount of density variation; and control means for controlling speed of said motor based on said speed control profile.