Patent ID: 7489898

Claim:
A sheet processing apparatus comprising: a curling unit which curls an end portion of a sheet; a stacking portion on which the sheet curled by said curling unit is stacked; a folding device which is disposed downstream of said curling unit and folds a sheet or a sheet bundle curled by said curling unit ; a sheet bundle conveying portion which conveys the curled sheet or the curled sheet bundle stacked on said sacking portion to said folding device; and a curved guide path which guides the sheet or the sheet bundle conveyed by said sheet bundle conveying portion, wherein said folding device is disposed in said curved guide path, and said curling unit curls the end portion of said sheet in the same direction as a direction of curvature of said curved guide path, and wherein said folding device folds the curled sheet or the curled sheet bundle so that the end portion of the sheet curled by said curling unit may face inwardly.