| 摘要 |
<p>PURPOSE:To improve the function of a head medium interface and to increase the recording density by decreasing the contact area between a lower cylinder and a magnetic tape toward the driving direction of the tape and using a metallic thin film tape which has a dynamic frictional coefficient larger than the specific value between the magnetic tape and the lower cylinder. CONSTITUTION:A rotatable upper cylinder 1 containing a magnetic head 3 is used together with a fixed lower cylinder 2, and a magnetic tape 4 which is wound round both cylinders 1 and 2 and can perform a helical scanning action. The contact area between the cylinder 2 and the tape 4 is decreased toward the driving direction of the tape 4. While the tape 4 uses a metallic thin film tape having a >=0.3 dynamic frictional coefficient set between the tape 4 and the cylinder 2. As a result, the increase of the tape tension is reduced toward the driving direction of the tape 4 and then the floating value of the tape 4 increases. Thus it is possible to obtain a helical scan recording/ reproducing system which excels in the head medium interface. Then the magnetic recording density is improved.</p> |
