0665962-A1 is referenced by 2 patents.
An electrographic printer or copier contains, for example, a preheating plate (20, 21) upstream of a pair of fixing rollers in the direction of travel of the substrate and a brake unit (10). The preheating plate (20, 21) and the brake unit (10) form a sliding surface (23). Good contact between the sliding surface (23) and the substrate is provided by suction apertures (18, 19) coupled to an underpressure-generating device. A valve (1) may be used to adapt the underpressure to the operating parameters of the printer and copier and those of the substrate.