Clinch mechanism in stapler

A clinch mechanism of a stapler defining a bending groove in which legs of a staple penetrating a workpiece are bent by a movable clincher, the clincher having an angled side for engaging a leg of the staple, the clincher pivotally movable in a plane of movement, each leg receiver comprising:

• a wall member including a side defining a side of the bending groove, a guide slope inclined towards the bending groove, and a protrusion that extends from and defines an end of the guide slope, and
• a wall surface on said protrusion, wherein said wall surface is located adjacent an end of the respective guide slope such that said wall surface is parallel to the operative direction of the movable clincher, wherein each leg of said staple engages a guide slope to be bent toward the plane of movement after penetrating the workpiece, and engages the angled side of the clincher when the angled side is oriented downwardly an angle with respect to a horizontal plane so that as the clincher pivots upwardly the staple leg is bent at an angle away from the plane of movement and toward said wall surface.

A clinch mechanism for a stapler in which legs of a staple penetrating a workpiece are bent, the clinch mechanism comprising:

• receivers for receiving the legs of the staple which have penetrated the workpiece, each receiver comprising first and second wall members, said first wall member comprising a guide structure including a guide slope inclined toward said second wall member, a protrusion extending from and defining an end of the guide slope closest to the second wall member of another receiver, and a wall surface on said protrusion, wherein the clinch mechanism defines a bending groove in which the legs of the staple are bent, the bending groove being defined by said first and second wall members of said receivers and said wall surface;
• and
• clinchers pivotally movable in said bending groove in an operative direction defining a plane of movement, each clincher having an angled side to engage a corresponding staple leg, wherein each staple leg engages a guide slope to be bent toward the plane of movement after penetrating the workpiece, and engages said angled side of one of said clinchers when said angled side is oriented downwardly at an angle with respect to a horizontal plane so that as the clincher pivots upwardly the staple leg is bent at an angle away from the plane of movement and toward said wall surface.