The ornamental design of a userinterface for a franking machine, as shown and described.
The file of this patent contains at least one drawing/photograph executed in color. Copies of this patent with color drawing(s)/photograph(s) will be provided by the Office upon request and payment of the necessary fee.
FIG. 1 is a front view of a user interface for a franking machine showing our new design; and,
FIG. 2 is a perspective view thereof.
The broken line is the boundary of the claimed design and forms no part thereof.