Patent ID: 8599451

Claim:
A sheet conveyance device comprising: a plurality of conveyance units configured to be arranged in a direction intersecting a sheet conveyance direction to convey a sheet, said conveyance units being driven independently; at least three detection sensors configured to be arranged in a direction intersecting the sheet conveyance direction at an upstream side from said conveyance units in the sheet conveyance direction to detect the sheet; a skew amount computation unit configured to measure a time difference between detection timings of a front end of the sheet by two of said at least three detection sensors except the detection sensor that detects the front end of the sheet first as a front-end detection time, and to compute a skew amount of the sheet as a front-end skew amount according to the front-end detection time; and a speed change unit configured to make the conveyance speeds of said conveyance units be different according to the front-end skew amount so as to correct the skew of the sheet.