An apparatus for signal and/or current transmission between terminals which can move in relation to one another and which are fitted, on the one hand, on a fixed stator and, on the other hand, on a rotor of a cassette that can rotate about a common axis with the stator. At least one flat ribbon cable, which is equipped with electrical conductors, runs in turns and forms a wound body (W), is arranged within the cassette between the terminals, the ends of the flat ribbon cable being connected to contact parts (19, 20) for the purpose of connecting ongoing cables. In order to accommodate the complete wound body (W) for its protection during transport and/or during storage, a pot-like cover (22) is provided which engages around said wound body and is fitted detachably to an essentially disc-shaped carrier (21).