A method and apparatus are provided for cutting a decorative groove in a matboard. The matboard is positioned adjacent a guide. A carrier is adapted to be moved along the guide with two blades oriented in separate planes which intersect each other and which lie at an oblique angle relative to the matboard....http://www.google.fr/patents/US5603253?utm_source=gb-gplus-shareBrevet US5603253 - Method for cutting a groove in a matboard
