Device for binding of pious books or others for periodic partial use. (Machine-translation by Google Translate, not legally binding)

摘要

A new device for binding of pious books, or others for periodic partial use, essentially characterized by the fact that the unchanging or permanently fixed part is permanently bound, while the periodic or replaceable part is arranged in additional fascicles to the part fixed, using suitable means disposed in the covers of that first binding. (Machine-translation by Google Translate, not legally binding)