A comb binding machine is a device that punches holes along the edge of a stack of paper and then threads a plastic comb through the holes to hold the pages together. The result is a bound document that can lay flat when opened and easily accommodate the addition or removal of pages.

Comb binding machines are designed to punch holes along the edge of the pages, and the comb spine is then threaded through these holes, effectively binding the document. Once the comb is in place, it can be easily opened or closed, allowing for adding or removing pages without the need for special tools or equipment.

Comb binding machines: These devices use plastic comb spines to bind pages together. The curved shape of the comb’s teeth allows pages to be turned easily and can be opened and closed for editing (adding or removing pages). This is the cheapest and most popular style of machine binding.

Comb binding (sometimes referred to as "cerlox" or "surelox" binding) is one of many ways to bind pages together into a book. This method uses round plastic spines with 19 rings (for US Letter size) or 21 rings (for A4 size) and a hole puncher that makes rectangular holes.

It is an easy way to add a professional look to your reports, catalogs, cookbooks, and any other documents you want to bind. The document is bound using a plastic spine that has teeth and resembles a comb, hence the term “comb binding.”