Comb binding is one of many ways to bind pages together into a book. This method uses round plastic spines with 21 rings (for A4 size) and a hole puncher that makes rectangular holes. Comb binding is sometimes referred to as plastic comb binding or spiral comb binding. Plastic comb binding machines, electric comb binding machines or manual comb binding machines are perfect for the home, business or office.
To bind a document, the user first punches holes in the paper with a specialized hole punch. Pages must be punched a few at a time with most of these machines. If hard covers are desired, they must be punched as well. Then the user chooses a spine size that will match the document. The rings on the spine open and insert into the holes in the page, then rest against the body of the spine, resulting in a closure that can be opened again for making changes to the book.