Patent ID: 7798490

Claim:
A sheet conveying apparatus, comprising a sheet conveying roller which conveys a sheet and corrects a delay or an advance of the conveyed sheet by increasing or decreasing the sheet conveying speed of the sheet conveying roller, comprising: a deviation amount detection unit which detects a delay amount or an advance amount of the conveyed sheet; and a control amount setting unit which sets, when the delay or the advance of the sheet is corrected, the sheet conveying speed and the correction time of the sheet conveying roller based on the delay amount or the advance amount of the sheet detected by the deviation amount detection unit, wherein when the sheet conveying speed of the sheet conveying roller before the deviation amount detection unit detects the delay amount or the advance amount of the sheet is represented by V 1 , the delay amount or the advance amount of the sheet detected by the deviation amount detection unit is represented by X, the radius of the sheet conveying roller is represented by R, the correction time is represented by T, and the sheet conveying speed of the sheet conveying roller in a correction operation is represented by a conveying speed V 2 , the control amount setting unit sets the sheet conveying speed V 2 and the correction time T of the sheet conveying roller so that the following expressions are satisfied; V 1 T−V 2 T=X T= 2 nπR/V 2 . . . (n is an integer).