CUTTING EDGE FOR PACKAGING CONTAINER AND PACKAGING CONTAINER HAVING THE SAME

摘要

A cutting edge (24) is divided into a center area (28) having a V-shaped apex portion, a pair of intermediate areas (29) on the outer sides of the center area (28), and a pair of side areas (30) on the outer sides of the pair of intermediate areas (29). The center area (28) has first teeth having the greatest tooth height and second teeth having a smaller tooth height than the first teeth. The first teeth are arranged at the apex portion and, at the same time, in the portion other than the apex portion at predetermined intervals with the apex portion positioned at the center. The second teeth are arranged between adjacent first teeth. A first straight line connecting the tooth points of the first teeth, a second straight line connecting the tooth points of the second teeth, and a third straight line connecting the tooth bottoms of the first and second teeth are parallel to each other. The second straight line is located between the first and third straight lines. The tooth points of the intermediate teeth of the pair of intermediate areas (29) are located on the second straight line or between the second and third straight lines. The tooth points of side teeth of the pair of side areas (30) are located on the second straight line or between the first and second straight line.