Magnetic tape shifting device

摘要

A magnetic tape shifting device comprises a movable member for carrying a plurality of reels and a driving mechanism for moving the movable member so that a desired reel carried by the movable member comes to a given position on a stationary member of the device. The movable member may comprise a rotatable member or a slidable member for carrying a plurality of payoff reels and/or takeup reels. The end of running magnetic tape may be detected by a photo detector for energizing a motor or motors which drive the movable member so that next reel will come to the given position immediately after the end of the operation of the former magnetic tape. The device according to the present invention may be applied to a tape recorder which produces a number of tapes by copying from an original or master tape, and time required for copying a number of tapes can be remarkably reduced because exchange of reels can be performed during operation of a magnetic tape of other reel.