Patent ID: 7975891
Filing Date: 2011-07-12
Classification: B27F,B42B,B42C,B42P

Abstract:
1. A stapler including: a staple cutting portion for cutting off a staple positioned at a leading portion of interlinked staples from the interlinked staples in which a plurality of approximately straight lined paper-made staples are interlinked in parallel; a shaping portion for shaping the staple cut off by the staple cutting portion such that a crown portion and leg portions bent approximately perpendicularly from the right and left sides of the crown portion are formed; a staple penetration portion for penetrating both the leg portions of the staple shaped by the shaping portion through binding sheets; and a staple bending portion for bending both the leg portions of the staple penetrated through the binding sheets by the staple penetration portion along the binding sheets and for bonding them mutually, wherein the staple penetration portion includes: a pushing unit for pushing down the staple with respect to the binding sheets; and two pieces of insertion-cutting blades which are provided concurrently at an interval in response to a length of the crown portion and which are provided with protrusion portions formed by protruding portions in the width direction at a predetermined height of the surfaces facing each other, each of the insertion-cutting blades including a push-out hole into which the staple bending portion is insertable, and wherein the respective insertion-cutting blades penetrate the binding sheets in a state in which both the leg portions of the staple that is shaped by the shaping portion into a shape in which both the edges thereof are bent to one direction are attached on the surfaces facing each other with respect to the respective insertion-cutting blades on the upside of the respective protruding portions, and the staple is pushed down by the pushing unit with respect to the binding sheets and the staple bending portion inserted into the push-out hole bends both the leg portions of the staple along the binding sheets and bonds them mutually.