Binding device applicable to suspended books for changeable sheets visible and analogous tokens (Machine-translation by Google Translate, not legally binding)

摘要

Binding device applicable to suspended books for changeable sheets, visible and analogous chips, comprising a spine composed of two pieces that either fit or simply rest on its closure forming a whole, whose spine is held in one of its parts on the back of a book and then the other is free to produce the necessary movement to replace leaves. (Machine-translation by Google Translate, not legally binding)