Abstract: The apparatus includes a binding station, means for supporting the straight fingers of a flat comb-like wire binder so that the fingers with the tips thereof foremost are directed toward the binding station, means engageable with the binder for pushing the fingers thereof into the station, and means at the station for progressively bending the fingers into circular form, the supporting means including means to prevent the portions of the binder fingers between the pushing means and the bending means becoming bent under the action of the pushing means, and the pushing means pushing the bent fingers through the perforations of the book to be bound and until the tip ends thereof become situated in the roots of the fingers. The bending means comprises two die members and a mandrel. The mandrel may be a single rod-like member, or may be a split mandrel composed of elements provided on the two die members.

Abstract: The apparatus includes a binding station, means for supporting the straight fingers of a flat comb-like wire binder so that the fingers with the tips thereof foremost are directed toward the binding station, means engageable with the binder for pushing the fingers thereof into the station, and means at the station for progressively bending the fingers into circular form, the supporting means including means to prevent the portions of the binder fingers between the pushing means and the bending means becoming bent under the action of the pushing means, and the pushing means pushing the bent fingers through the perforations of the book to be bound and until the tip ends thereof become situated in the roots of the fingers. The bending means comprises two die members and a mandrel. The mandrel may be a single rod-like member, or may be a split mandrel composed of elements provided on the two die members.