Laminating device and use of this laminating device

1. A binding element ( 1 ) for a bundle of leaves ( 9 ), whereby the binding element ( 1 ) comprises a spine ( 2 ) for enclosing an edge of the bundle ( 9 ) and two plastic cover sheets ( 3 , 4 ) fastened to the spine ( 2 ), wherein a first of the cover sheets ( 3 ) is transparent and the second of the cover sheets ( 4 ) is translucent,

wherein the spine is a U-shaped spine ( 2 ) with a base ( 5 ) and two arms ( 6 ), and

wherein the arms ( 6 ) have a length (L) of 9.5 to 11.5 mm.

2. The binding element according to claim 1 , wherein the first cover sheet ( 3 ) has a gloss surface.

3. The binding element according to claim 1 , wherein the second cover sheet ( 4 ) has a matt surface.

4. The binding element according to claim 1 , wherein the spine ( 2 ) is symmetrical with respect to the plane that extends in the centre between the two arms ( 6 ) and which is perpendicular to the base ( 5 ).

5. The binding element according to claim 1 , wherein the inside of the spine ( 2 ) is provided with a layer of hotmelt adhesive ( 8 ).

6. The binding element according to claim 1 , wherein the spine ( 2 ) is made of metal, whereby the spine is plastically deformable in order to be able to adjust the distance between the ends of the arms ( 6 ) turned away from the base ( 5 ).

7. The binding element according to claim 6 , wherein the spine ( 2 ) is such that it is plastically deformable to enable the adjustment of the said distance by manually pushing the arms ( 5 ) towards one another without tools.

8. The binding element according to claim 1 , wherein the first cover sheet is a front cover and the second cover sheet is a back cover.

9. The binding element of claim 8 , wherein the first and second cover sheets are interchangeable as the front cover and the back cover.