Patent ID: 8123217

Claim:
A sheet-conveying apparatus, comprising: a pair of rotary members that conveys a sheet; a skew-feeding correction member that is provided to be rotatable coaxially with one rotary member of the pair of rotary members, that has an abutting portion with which a leading edge of the sheet conveyed toward the pair of rotary members is brought into contact for skew-feeding correction, and that is pressed by the conveyed sheet to rotate; and a positioning portion that has a biasing member for biasing the skew-feeding correction member to a direction opposite to a direction to which the skew-feeding correction member is pressed by the sheet to rotate, and that positions the skew-feeding correction member at a stand-by position at which the abutting portion abuts against the sheet upstream in a sheet-conveying direction with respect to a nip portion of the pair of rotary members, wherein the sheet-conveying apparatus is set so that, in order to pull out the sheet while preventing the skew-feeding correction member from rotating to a direction opposite to the sheet-conveying direction together with the sheet to be pulled out when the stopped sheet is pulled out to the direction opposite to the sheet-conveying direction under a state in which the skew-feeding correction member is caused to rotate from the stand-by position, the following formula is established: M+M S <M A wherein a moment generated in the skew-feeding correction member due to a resultant force of a tension to an upstream side in the sheet-conveying direction and of a tension to a downstream side in the sheet-conveying direction when the sheet is pulled out is assumed to be M A , wherein a moment generated in the skew-feeding correction member due to a frictional force between the skew-feeding correction member and the sheet when the sheet is pulled out is assumed to be M, and wherein a moment generated in the skew-feeding correction member due to the biasing member when the sheet is pulled out is assumed to be M S .