| 摘要 |
<p>PURPOSE:To reduce the size of a gap between a rotating drum and an opposed part, to prevent a magnetic tape from being wound into the rotating drum, to make heat transfer to the drum excellent and to eliminate dew condensation by directly fitting a holder in a fixed drum with the aid of a fitting part. CONSTITUTION:The size of the gap between the rotating drum 4 and the opposed part 22 is reduced by directly fitting the holder 20 in the fixed drum 2 with the aid of the fitting part 21. Therefore, the surface of the magnetic tape where the dew condensation occurs is prevented from being stuck and wound into the drum 4 with the aid of the opposed part 22. Since the gap between the upper surface of the drum 4 and a bridge part 23 is small, the tape is prevented from running on the upper surface of the drum 4. Furthermore, by burying an organic positive characteristic thermistor 24 in the fitting part 21, heat generated in the thermistor 24 is efficiently transferred to the drums 2 and 4 and the dew condensation occurring on the drum is eliminated in a short time.</p> |
