Springback binder

A springback binder is a device for rapid and repeated binding of loose-leaf collections into books.

When the front and back covers are pushed apart by more than 270 degrees, the spring will open, and the inner book can be inserted, removed or supplemented by individual leaves.

Typical paper sizes are A4 and A5, or their equivalent, the maximum stack height is usually 2 cm.

In contrast to other binding methods, the binder can be reused by simply removing the old inner book block and replacing it by a new one.

In the GDR, a springback binder in A5 format was part of a first grader's typical equipment.