Laser system for making creases in cardboard

摘要

The present invention is a method of folding a cardboard along a fold-line. The cardboard consists of an outside layer, a middle layer and an inside layer. The method includes the step of using a laser system to cut a first slot and a second slot in the inside layer. The first and second slots are disposed parallel to the fold-line which is disposed between the first and second slots. The method also includes the step of folding the cardboard along the fold-line. When the outside layer is pulled tight the inside layer and the middle layer are pushed inward. The first and second slots must be wide enough to allow the inside layer to easily deform when the cardboard is folded.