Patent ID: 8958739
Filing Date: 2015-02-17
Classification: G03G

Abstract:
1. A printing apparatus comprising: a conveying device having a conveying belt configured to convey a sheet, the conveying belt having an outer peripheral surface; a printing device configured to print an image on the sheet that is conveyed by the conveying device in a conveying direction; a plurality of sensors arranged to be spaced away from each other in a main scanning direction that is perpendicular to the conveying direction, the plurality of sensors configured to emit light to different detection regions on the outer peripheral surface of the conveying belt and to receive light reflected by the conveying belt; and a controller configured to execute a skew-detection-mark printing process of controlling the printing device to print a skew detection mark at positions passing the respective detection regions such that the skew detection mark extends over an end of the sheet in the conveying direction and the outer peripheral surface of the conveying belt.