Patent ID: 7035562
Filing Date: 2006-04-25
Classification: G03G

Abstract:
1. An image forming apparatus comprising: an image bearing member; image forming means for forming a toner image and a toner patch image for density detection on said image bearing member; a transfer device including a transfer medium for transferring the toner image onto a transfer material, wherein said transfer device transfers the toner patch image using a settable transfer bias onto said transfer medium; and a density sensor for detecting a density of the toner patch image transferred onto said transfer medium, wherein an image forming condition for forming the toner image by said image forming means on said image bearing member is controlled in accordance with an output of said density sensor, and wherein a setting value of the transfer bias for transferring the toner patch image onto said transfer medium is changeable in correspondence with a density of a toner patch image to be formed on said image bearing member.