| 摘要 |
A recording and/or reproducing apparatus, such as a video tape recorder, comprises a drum having a peripheral surface on which a magnetic tape can be wrapped, and at least one head for recording signals on, reproducing signals from, the magnetic tape by helically scanning it. Grooves are formed in the peripheral surface of the drum to inhibit formation of a thin layer of water between the surface of the drum and the magnetic tape. The lengths of the grooves are substantially parallel to the direction of transport of the magnetic tape and each groove includes a wall portion disposed at an angle greater than 3 degrees to a line joining the crests of the grooves and normal to the direction of transport of the magnetic tape. |
