Audio data are played back by a personal computer a relationship with a playback process recognized easily. A first part of the space is located adjacent the outlet opening and is intended for a first roll in a dispensing position and a second part of the space includes a locking element intended to keep the second roll in standby position. A re-feed unit feeds the recording medium having passed through the printer engine again to the printer engine. The rubber sleeve is slidably fitted around the end of the pin and is retained axially by an end cap. Use of a constant pressure streams combining chamber feeding a mix pump allows decoupling of individual streams ratio dosing flows and pressures one from another and from the combined stream. The front edge is spaced from the back edge 32 in a depth direction X, A.