Patent ID: 8843003
Filing Date: 2014-09-23
Classification: G03G

Abstract:
1. An image forming apparatus comprising: an image holding member configured to hold a toner image; a transfer unit configured to transfer the toner image held on the image holding member onto a recording medium having a first side and a second side; a fixing unit configured to fix the toner image transferred onto the recording medium by the transfer unit; a transport unit configured to reverse the recording medium having the toner image fixed onto the first side by the fixing unit and configured to transport the reversed recording medium back to the transfer unit; a transfer-performance-detection toner image forming unit configured to form a plurality of transfer-performance-detection toner images which are arranged in an array and are formed with different transfer settings of the transfer unit so that a transfer-performance-detection toner image to be formed on the first side of the recording medium and a transfer-performance-detection toner image to be formed on the second side of the recording medium at least partly overlap each other; a density detection unit configured to detect densities of a plurality of transfer-performance-detection toner images transferred onto the second side of the recording medium or densities of a plurality of transfer-performance-detection toner images which remain on the image holding member after a plurality of transfer-performance-detection toner images have been transferred onto the second side of the recording medium; and a selector configured to select a transfer setting of the transfer unit in accordance with a detection result obtained by the density detection unit.