US Patent 7305741 Binder clip

A binder clip, having a structure that removably binds several sheets of documents rotating and pressing hinged pressing levers that function to open or close the mouth of a clip body, thereby binding the documents prior to keeping them in a desired place, is disclosed. The binder clip has a clip body. A coupling guide, formed as a U-shaped frame body, is placed outside each of upper and lower surfaces of the clip body, with a locking projection provided at each end of the U-shaped coupling guide in order to be seated in the pocket. A pair of hinge holes is formed on opposite positions of the inner surface of the coupling guide. A plate-type pressing lever is formed as a plate-shaped body having a hinge hole so that the pressing lever is hinged to the hinge holes of the coupling guide using a hinge pin.