Patent ID: 8727194

Claim:
A non-metallic V-shaped cutter blade that is used by being attached to a packing container accommodating rolled packing material to cut the packing material, the cutter blade comprising a center portion including a vertex of the V, a pair of end portions each including one of ends of the V, and a pair of middle portions each located between one of the end portions and the center portion, wherein: the center portion includes a plurality of first center teeth and a plurality of second center teeth on both sides of the vertex, the second center teeth have a tooth height less than a tooth height of the first center teeth, all the first center teeth are arranged such that a distance between adjacent first center teeth is constant for all the first center teeth on both sides of the vertex, one of the first center teeth located at a center is located at the vertex of the V, the second center teeth are each located between adjacent two of the first center teeth, a first tooth top line connects tooth tops of the first center teeth, a second tooth top line connects tooth tops of the second center teeth, and a tooth root line connects roots of the first center teeth and roots of the second center teeth, the first tooth top line, the second tooth top line and the tooth root line are parallel to one another, and the second tooth top line is located between the first tooth top line and the tooth root line, wherein: the middle portions each include a plurality of middle teeth, and tooth tops of the middle teeth are located on the second tooth top line or between the second tooth top line and the tooth root line, and wherein: the end portions each include a plurality of first end teeth, the first end teeth are located to overlap the first tooth top line, and the first end teeth each include at least one arcuate oblique side that is recessed inward of the first end tooth.