Patent ID: 8091887

Claim:
A sheet feeding device comprising: a feeding unit configured to feed a sheet; a plurality of moving-amount detecting units for respectively detecting moving amounts of the sheet fed by the feeding unit at a plurality of points in a width direction of the sheet; a deviation calculating unit configured to calculate a deviation between a moving amount of the sheet on the left side of a feeding direction of the sheet and a moving amount of the sheet on the right side of the feeding direction of the sheet, the left side moving amount and the right side moving amount respectively detected by the plurality of moving amount detecting units; a skew detecting unit configured to detect both a skew of a leading edge of the sheet and a cumulative skew based on a relation between the deviation calculated by the deviation calculating unit and predetermined threshold values; and a feed stop unit configured to cause the feeding unit to stop feeding the sheet, wherein the feed stop unit is configured to stop the feeding unit from feeding the sheet when the skew detecting unit detects the cumulative skew of the sheet.