| 摘要 |
PURPOSE:To lower the temperature of a magnetic conversion part and to prevent the thermal deformation of a magnetic tape by providing a nozzle to jet the cooling air to the magnetic conversion part. CONSTITUTION:A cavity part 57 is formed by hollowing out an end block 24. The cooling air is jetted to a magnetic conversion part 20 through a nozzle 55 having about 0.5mm diameter. Thus the thermal deformation of a magnetic tape can be avoided by feeding the cooling air to the part 20 through a cooling air pipe 56. |
