Sheet folding apparatus and image forming apparatus having the same

摘要

In a sheet folding apparatus for nipping and conveying a sheet by a pair of folding rollers and folding the sheet, at least one roller of the pair of folding rollers has large- and small-diameter portions along the axis. The contact area between the sheet and each folding roller can be reduced. As a result, a relief for the pressure from the two ends of the roller shaft in folding a sheet can be ensured at a portion where the sheet creases, and any crease can be prevented.