| 摘要 |
This album with interchangeable sheets has coupling elements for the sheets which are preferably made of plastics, are fixed on the inner side of the rear cover and can be opened after extracting closure profiled elements which are mutually aligned and are parallel to the spine of the binder. The sheets may easily be turned since they have slots which are particularly enlarged with respect to the cross section of the coupling elements. Furthermore a perfect alignment of the sheets is obtained in a very simple and original manner, by virtue of raised portions which also protrude from the inner side of the rear cover and act against an appropriately shaped inner edge of the sheets.
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