A proximity probe, for use in determining a distance to a probe target, includes a first antenna configured to wirelessly receive a radio-frequency signal at a first predetermined frequency and a converter configured to convert the received signal to a driving signal and to an electrical signal. The seal assembly may generally include a turbine seal and a spring member. Arranged below the folding channel is a third belt conveyor having a folding section which slopes sharply downwards for receiving a piece of linen and belongs to an upper support side which can be pivoted upwards before a second fold carried out with reversal of the direction of movement of the third belt conveyor. In one embodiment, the first computing element and the second computing element issue substantially similar instruction streams to one of the local mass storage devices.