Patent ID: 8983362
Filing Date: 2015-03-17
Classification: B65H,G03G

Abstract:
1. A sheet binding apparatus which binds a plurality of sheets, comprising: a binding unit which has a fixed concave-convex member which is fixed at a predetermined position and a movable concave-convex member disposed above the fixed concave-convex member, the movable concave-convex member movable with respect to the fixed concave-convex member; and a moving portion which moves the movable concave-convex member from a first position at which the movable concave-convex member is separated from the fixed concave-convex member to a second position at which the movable concave-convex member and the fixed concave-convex member nip the plurality of sheets for binding together the plurality of sheets, wherein the fixed concave-convex member has a plurality of convex portions projecting upward and a plurality of concave portions formed between the convex portions and the movable concave-convex member has a plurality of convex portions projecting downward and a plurality of concave portions formed between the convex portions, and an arrangement pitch of the convex portions and the concave portions of the fixed concave-convex member is equal to an arrangement pitch of the convex portions and the concave portions of the movable concave-convex member, and wherein an angle between a vertical plane and a planar surface between a concavity and convexity of the movable concave-convex member is different from an angle between a vertical plane and a planar surface between a concavity and convexity of the fixed concave-convex member, and a height of the convex portion projecting downward of the movable concave-convex member is different from a height of the convex portion projecting upward of the fixed concave-convex member.