Patent ID: 7817948
Filing Date: 2010-10-19
Classification: G03G

Abstract:
1. An image forming apparatus comprising: a plurality of image forming units adapted to sequentially form images using different colors on an endless belt or on a printing material conveyed by the endless belt; a control unit adapted to form a misregistration detection pattern on the endless belt using said image forming units; and a detection unit adapted to detect the misregistration detection pattern formed on the endless belt, wherein said misregistration detection pattern includes: a first pattern array constructed with a plurality of serial first patterns, each formed with one of misregistration detection colors and a reference position color; and a second pattern array constructed with a plurality of serial second patterns, each formed with one of misregistration detection colors and a reference position color, wherein the first pattern array and the second pattern array are arranged along a conveying direction in which the first pattern array and the second pattern array are formed on the endless belt, and a color order of the misregistration detection colors in the first pattern array and the second pattern array arranged along the conveying direction is changed.