Patent ID: 8331813
Filing Date: 2012-12-11
Classification: G03G

Abstract:
1. An image forming apparatus comprising: an image bearing body that is rotatably supported; an exposing unit that irradiates said image bearing body to form a latent image; a developer bearing body that develops said latent image using a developer to form a developer image; a transfer unit that transfers said developer image to a recording medium; a feeding unit that feeds said recording medium to a transferring position where said developer image is transferred to said recording medium; a density detecting unit that detects a developer density of said developer image transferred to said recording medium, and a speed difference control unit that controls a difference of a circumferential speed of said image bearing body and a feeding speed of said recording medium fed by said feeding unit, wherein said speed difference control unit changes said difference of said circumferential speed of said image bearing body and said feeding speed of said recording medium based on a density of a thin line pattern transferred to said recording medium, the density of the thin line pattern being detected by said density detecting unit, and wherein said density detecting unit detects a developer density of a speed-difference-correction pattern image transferred to the recording medium, and also detects a developer density of a density-correction pattern image transferred to the recording medium.