| 摘要 |
PROBLEM TO BE SOLVED: To groove without generating a breakage in an angled part of the groove, as to structure of a slotter knife. SOLUTION: This slotter knife for grooving in a corrugated cardboard sheet includes an end face 122b abutting on a deep end of the groove, in a rotation-directional tip part of the slotter knife, and a projected part 122a projected radial-directionally from the end face 122b. The end face 122b is formed in a sloped face inclined with respect to a diametric-directional face directed toward an axis, so as to position an axial-center side gradually toward a rotation-directional front side with respect to a radial-directional outer side which is a projected part 122a side. COPYRIGHT: (C)2010,JPO&INPIT |
