Patent ID: 7267895
Filing Date: 2007-09-11
Classification: B26D,Y10T

Abstract:
1. A magnetic tape manufactured by feeding a broad magnetic tape including a broad support formed with a magnetic recording layer on one side thereof and a back coat layer on the other surface thereof to a portion between a disk-like upper blade and a disk-like lower blade overlapping each other and rotating in opposite directions to each other and cutting it into magnetic tapes each having a predetermined width, a cut surface of the magnetic tape on the side of the lower blade including a broken region formed by cutting the magnetic tape by a breaking force, wherein the cut surface of the magnetic tape on the side of the lower blade further includes a first sheared region having a first irregular raised and depressed pattern and a second sheared region having a second irregular raised and depressed pattern, the first sheared region and the second sheared region formed by cutting the magnetic tape by a shearing force; wherein the magnetic tape further comprises a cut surface on the side of the upper blade, the cut surface on the side of the upper blade including an irregular raised and depressed pattern; and wherein the irregular raised and depressed pattern of the cut surface on the side of the upper blade and the first and second irregular raised and depressed patterns of the cut surface on the side of the lower blade are reduced when the broken region of the cut surface on the side of the lower blade is 50% to 60% of the cut surface on the side of the lower blade.