Binding ring for hanging or storing documents is made in one piece and can be opened and closed via link

摘要

The binding ring (1) is made in one piece and can be opened and closed via a ling. It may be made with film hinges (2.1, 2.2, 2.3). The can adopt a bi-stable or mono-stable condition when open and closed. They may be fitted with a crank mechanism (3). The groove (4) and spring (5) may have teeth (6) to prevent the ring springing open in the YZ-plane.