| 摘要 |
<p>PURPOSE:To minimize the wear of a magnetic head and the rotation load of a cylinder and to eliminate the damage of the magnetic tape by providing continuously the level difference in the diameter direction of an outer circumferential surface of a rotation cylinder and a fixed cylinder. CONSTITUTION:A rotation cylinder 8 is rotated for a rotation center 2a, the cylinder center of the magnetic tape sliding part of a fixed cylinder 9 is decentered for a rotation center 2a of a rotation cylinder, the level difference in the diameter direction of the outer circumferential surface of the rotation cylinder 8 and the fixed cylinder 9 is continuously changed from a contact starting edge C to a contact termination D of the magnetic tape and cylinders 8 and 9 and the level difference becomes larger as a termination part is approached. Consequently, the increase in the tension of the magnetic tape can be suppressed, the excessive load is not received by a cylinder part and the magnetic tape, and the stable tape travelling is executed. Thus, the wear of the magnetic head and the rotation load of the cylinder 8 are minimized and the generation of the damage of the magnetic tape can be prevented.</p> |
