Patent ID: 7331572

Claim:
A sheet finisher including processing means for executing preselected processing with a sheet carrying an image thereon, said sheet finisher comprising; stacking means for stacking sheets; stapling means for stapling a sheet stack positioned on said stacking means; folding means for folding the sheet stack or the sheet with a fold roller; conveying means for conveying the sheet stack or the sheet positioned on said stacking means to either one of said folding means and an outside of said sheet finisher; switching means to be in a first position for selectively steering the sheet stack or the sheet toward a first path extending to said folding means, or to be in a second position for selectively steering the sheet stack or the sheet toward a second path extending to the outside of said sheet finisher; and control means to control driving of the switching means so that when a jam occurs in a condition wherein said switching means is in said first position, a restriction of said switching means acting on the sheet stack or the sheet is canceled and said switching means is then driven to said second position.