| 摘要 |
<p>PURPOSE:To make the adjustment in the back tension of a tape at its traveling time precise and to improve the workability in an adjusting work by holding a magnetic sensor with a rotatable and movable member on the specific shaft. CONSTITUTION:A tension measuring instrument is set up at the part C of a back tension adjusting mechanism and a tapered nut 25 is moved in the vertical direction with measuring the back tension of a tape 18. In that case, a magnetic sensor holder 21 receives the rotation regulation in D direction centering around a support shaft 24 by a helical spring 23, the projection E for adjustment is always pressed to the tapered part of a tapered nut 25 to vertically move the tapered nut 25, the overlap of a magnet 8 and magnetic sensor 10-1 is delicately adjusted by rotating the magnetic sensor holder 21 on a fixed plane and the back tension of the tape 18 at its traveling time is precisely adjusted.</p> |
