An inking device of a printing unit includes an ink reservoir, an ink film pick-up roller which has a shaft, and an inking roller having a shaft. A coupling body with or made of an elastomer is provided, the coupling body being connected on the one hand fixedly to the component leg and on the other hand being fixedly connected to the member leg. The contact locations and contact vanes each establish an electrical connection with one another in the state in which they are pressed against the circuit carrier. Also disclosed is a method of preparing the smart information carrier. The location test module obtains a second subscriber access line identity for the subscriber access line, obtains a second subscriber location for the second subscriber access line identity, and compares the first subscriber location and the second subscriber location.