The device for stabilizing stacking up of tables having folding legs and a plate provided with an edge, an upper face and a lower face, comprises a latch element movably connected to the plate and a tooth defining one end of the latch element. In one embodiment, unknown sources are spatially grouped to produce a system interaction matrix with block factors of low rank within a given error tolerance and the unknown sources are determined from compressed forms of the factors. A plurality of input gears are configured to be interchangeably connected to the housing about a first rotational axis. The filling temperature of the compressed gas stream is controlled by adding heat to the compressed gas stream by a trim heater or to the vapor stream to be compressed by recirculating part of the compressed gas stream to an inlet of the compressor. In order to increase the tamperproofness of the image to be recorded and the identifiability of the said image, without adversely affecting the brilliance and colour fidelity of the image, the invention provides for a portion of the image information that is to be recorded to be additionally written to the substrate with the aid of radiation. The preconditioning signal is separate from a leader of the data packet to be transmitted.