Abstract: In a stapler device wherein a head section 51 for driving a staple into a sheet stack and an anvil section 61 for receiving and bending the staple driven from the head section 51 are independent from each other and movable in a sheet-width direction of the sheet to be passed therebetween, the head section 51 and the anvil section 61 respectively include holders 52, 62, which are respectively guided by support shafts 81, 82 and drive shafts 72, 73, and a staple-driving unit 56 and a staple-receiving unit 65, which are detachable from their respective holders 52, 62.

Abstract: A finisher connected to a copying machine produces a bound booklet by inserting papers from the copying machine into a cover with an adhesive layer of a hot-melt adhesive which is coated on the inner surface of near a spine interconnecting a front board and a back board, and heating the cover and a sheaf of papers, and joining them by adhesion. Thus, the series of operations ranging from the preparation of documents through the bookbinding can be facilitated and expedited.

Abstract: A sheet reversing apparatus which has a take-in path, a reversing path which extends from the take-in path in a substantially same direction, a take-out path which extends from a junction of the take-in path and the reversing path in a substantially perpendicular direction to the extending direction of the reversing path. A sheet is fed from the take-in path to the reversing path, and when the trailing edge of the sheet comes out of the take-in path, the sheet is fed back from the reversing path to the take-out path. In an entrance portion of the reversing path, a first reversing roller which is driven to rotate in a feed-back direction toward the take-in path and a second reversing roller which is capable of coming into contact with and moving away from the first reversing roller are provided.