Coil Binders — Punching for Plastic Coil

By David Spiel

Punching for spiral binding of any kind is a tricky matter—and even trickier for plastic coil. Punching for double-loop wire has always been a snap: Merely open your die, place your sheet against the pins and pull the pins nearest the edges of the sheet. This way there is no chance of punching a partial hole. You have the luxury of centering your sheet and producing a generous, attractive margin (the distance between the first or last hole and the head or foot of the book).