Patent ID: 9459565
Filing Date: 2016-10-04
CPC Classification: G03G

Claim Text:
1. An image forming apparatus comprising: an image bearer to rotate and bear a toner image; a transfer rotator to rotate and contact the image bearer to form a transfer nip therebetween; a bias application device to apply multiple biases to the transfer rotator, the multiple biases including: a controller to control the bias application device and set a sheet feeding interval according to a predetermined condition, the sheet feeding interval being a period from when the sheet is sent out from the transfer nip to when a subsequent sheet is fed to the transfer nip while multiple sheets are successively fed to the transfer nip, wherein, when the sheet feeding interval exceeds a predetermined threshold, the controller causes the bias application device to apply the non-image area bias for an application time Z within the sheet feeding interval and apply the cleaning bias for an application time expressed as X−Z within the sheet feeding interval, X representing the sheet feeding interval, and the controller sets the application time Z to an increased length of time as the sheet feeding interval is increased, and wherein the application time of the cleaning bias is a fixed value regardless of a length of the sheet feeding interval.