A recording-material cooling device is disposed downstream from a fixing device in a transport direction of a recording material. A server takes a source image, identifies possibly repetitive features, and tiles the image. A reformer process is integrated into the high temperature fuel cell which is arranged between, on the one hand, a fan and power plant compressor stages and, on the other hand, power plant turbine stages. Thus, an antenna device, in which a beam scanning is speeded, power consumption for the beam scanning is reduced, operation noise in the beam scanning is eliminated, the reliability is increased, and, when required, the beam direction can be directed to any direction, can be obtained.