Method and device for cutting a sheet material into strips and a corrugated-fin strips forming apparatus using the device

摘要

A slitting device including first and second cutting rollers disposed parallel to each other, a first guide roller axially adjacent to the first cutting roller, and a second guide roller axially adjacent to the second cutting roller. The cutting rollers have axially adjacent cutting edges at which a sheet material is cut into two strips, and recessed portions on the outer circumferential surfaces. The guide rollers have cutout portions circumferentially extending and axially opposed to each other on the outer circumferential surfaces, and projections defined by the cutout portions and opposed to the recessed portions of the cutting rollers. The cutting rollers cooperate with the corresponding guide rollers to define therebetween spaces for the strips of the sheet material. The cutting rollers and the guide rollers have a same outer diameter.