Opening and Closing Mechanism II

A device for opening and closing a binder for storing sheets with at least one mechanism arranged in the area of the back of the binder, which mechanism comprises at least two spaced-apart strips for connection to the binder, which strips are movably interconnected by at least one common hinge means,

• wherein the mechanism comprises a link means which is movably connected to a centre strip of the hinge means,
• that the hinge means comprises two outer strips which are movably connected to its centre strip,
• that the outer strips of the hinge means are movably connected to the link means in such manner that the opening and closing motion of the binder produces a simultaneous positively guided motion of the hinge means,
• the link means comprising a pivot means which is movably connected to the strips of the hinge means in such manner that the opening/closing motion of the binder produces a positively guided motion of the pivot means and the outer strips of the hinge means,
• the pivot means being pivotally connected to the centre strip of the hinge means via a centre axis which is a pivot centre, the centre axis of the pivot means extending substantially transversely to the longitudinal direction of the back of the binder.