PERFORATION BLADE FOR PERFORATING TISSUE PRODUCTS

摘要

An apparatus for perforating sheet materials is disclosed. The apparatus includes a perforation blade that defines a plurality of teeth for perforating sheet materials, such as tissue products. Each tooth on the perforation blade is defined by a pair of opposing side walls. The teeth are separated along an edge of the perforation blade by a plurality of recesses. In accordance with the present disclosure, the side walls have a non-zero angle with respect to the length direction of the blade. In one embodiment, each recess can have a slanted U-shape such that all of the side walls are parallel. In an alternative embodiment, the recesses can have a V-shape such that adjacent side walls extend in divergent directions. Perforation blades made according to the present disclosure prevent snagging and picking when a material is perforated.