Device for the production or binding of cards, changeable book books, filing cabinets and the like. (Machine-translation by Google Translate, not legally binding)

摘要

A device for the production or binding of cards, books of changeable sheets, filing cabinets and the like, consisting essentially of a flexible sheet of appropriate material, permanently rolled into a tubular shape with their overlapping edges, and whose sides can be separated under slight opening pressure , which forms the spine or is arranged on the spine of the card, book or similar, the sheets presenting an elongated notch through which the said flexible sheet passes. (Machine-translation by Google Translate, not legally binding)