What Is Coil Binding Machine ？

what is coil binding machine ？
Coil binding machines bind documents by aligning the pages, punching holes, inserting a coil, and then crimping and cutting the coil ends. Also known as wire binders, coil binding machines are usually manually operated and capable of binding from 90 to 300 pages. Coil binding machines are available with various comb diameters. The higher the comb diameter, the larger the number of pages the machine is able to bind. Coil binding is one of the most common forms of binding technology, and the one used to bind spiral notebooks.