Book, has connecting unit fastened at inner side of upper and lower book covers and having recesses, which are arranged at certain distance from each other, and retaining units held in recesses

摘要

The book has a book cover with upper and lower covers (1, 2), a book back (3), and retaining units (4) for restoring paper sheets (5). A connecting unit (6) that is fastened at inner side of the covers (1, 2) overdraws the paper sheets, so that an opening remains between the book back and the connecting unit. The unit (6) has recesses, which are arranged at a distance from each other, where the retaining units are held in the recesses.