A method of binding which uses a plastic strip containing spikes that are inserted into holes punched into the pages to be bound.
A punch machine, specially designed for this purpose, punches a series of holes on the front side of the pages for the spikes to extend through and protrude out the other side of the hole.
A second plastic strip is then mated with the protuding spikes on the back side of the pages and is then inserted into a binding machine which seals the binding by melting the plastic and trimming off the excess spike lengths.
Once bound, the pages become secure and cannot be removed or added without damaging the book.