Endless loop tape magazine, and a recording and/or playback machine utilizing the magazine

Claim 1

In a tape magazine including a fixed hub having an axis, a peripheral surface, a central opening, and a through slot extending axially across the hub between the peripheral surface and central opening; and an endless length of tape having a major portion wrapped around the peripheral surface of the hub to form a coil and a minor portion extending along a path from the innermost wrap of the coil through said slot, partially across the central opening and around the side surface of the coil to the outermost wrap of the coil to afford engagement of a drive mechanism with the tape along the path to pull the tape from the innermost wrap of the coil past a transducer positioned along the path, the improvement wherein said hub includes a plurality of axially spaced annular ribs extending around said axis and defining said peripheral surface for the hub, which ribs both reduce the surface area on which the inner wrap of the tape bears against the hub to reduce friction therebetween, and reduce the areas of adjacent wraps of tape in the coil that are pressed together in the tape coil, which wraps move relative to each other during rotation of the coil as the tape is pulled from the innermost wrap of the coil, to thereby reduce friction between the wraps.