CREASER

Creas″er (kr?s″?r), n. 1. 1. A tool, or a sewing-machine attachment, for making lines or creases on leather or cloth, as guides to sew by.
2. 2. A tool for making creases or beads, as in sheet iron, or for rounding small tubes.
3. 3. (Bookbinding) A tool for making the band impression distinct on the back. Knight.