Patent ID: 6939284

Claim:
A method for folding a sheet of material, comprising the steps of: feeding a sheet material into an area between a fold roller and a fold blade, the fold roller comprising at least two fold roller elements biased toward each other in a first plane, the fold blade having a longitudinal axis in a first direction and the fold blade having a shape that includes a rounded folding surface; and moving the fold roller and the fold blade relative to one another to form a rounded fold in the sheet, wherein the longitudinal axis of the fold blade moves from a first position vertically below an axis of the fold rollers to a second position vertically above the axis of the fold rollers, the fold rollers move along a circumferential surface of the rounded folding surface, and wherein the rounded folding surface is adjustable and the method comprises the step of adjusting at least one of a size and the shape of the rounded folding surface to change a perimeter of the rounded fold blade.