| 摘要 |
A magnetic reading and/or recording apparatus for reading and/or recording information from/on a magnetic information track on a photosensitive medium includes a magnetic reading and/or recording element connected to an edge follower having a variable tracking position. The edge follower tracks a longitudinal edge of a moving photosensitive medium by adjusting with the photosensitive medium responsive to any departures of the photosensitive medium from a defined path to effect a constant orientation of the magnetic reading and/or recording element with respect to the longitudinal edge of the photosensitive medium. The magnetic reading and/or recording apparatus further includes a member supporting the edge follower for movement by a forward leading edge of a photosensitive medium, when the photosensitive medium enters the defined path, from a normal initial position in the defined path to the variable tracking position, to effect a proper relation between the photosensitive medium in the defined path and the edge follower in its variable tracking position.
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