Patent ID: 7850155

Claim:
A sheet folding apparatus comprising: a first folding device having a first pair of rollers for nipping, folding, and conveying a paper sheet; a second folding device disposed downstream of the first folding device in a paper sheet conveyance direction, the second folding device having a second pair of rollers for nipping and conveying the paper sheet, wherein the first folding device conveys the paper sheet to the second folding device by making the paper sheet bent toward the second folding device, and the second folding device conveys the bent paper sheet to fold the paper sheet; and a folding assist member being pivotally arranged downstream of the first folding device in the conveyance direction of the first pair of rollers and opposite to the second pair of rollers, and structured to rotate toward downstream in the conveyance direction by press of a leading edge of the paper sheet and to rotate to push the paper sheet folded by the first pair of rollers toward the second folding device while the paper sheet is conveyed by the first pair of rollers.