595085 A nappy or diaper leg-surrounding opening forming apparatus (100) is disclosed. The apparatus comprises a cutter roller (110) having an outer circumferential surface provided with blades (112), an anvil roller (120) facing the cutter roller, and a controller unit which controls the circumferential speed of the rollers. The cutter roller rotates at a fixed speed to cut leg-surrounding openings in a continuous web. The controller can control the size of the openings cut by adjusting the circumferential speed of the roller. The apparatus can cut a first size and a second size leg-surrounding opening, the latter is narrower in width due to faster rotation of the cutter roller.
