Abstract: The present invention relates to a corona station for the preliminary processing of a strip material. The corona station includes at least one electrode (18) connected to a high-voltage power supply through connection means, a housing containing at least partially the electrode (18) and the connection means, and at least one cylindrical counter-electrode (17), wherein the strip of material (16) does not rest on the whole surface of said counter-electrode (17).

Abstract: Control device of a gas/air mixture regulating system for a gas flame treatment, with at least one burner (12) with an air supply duct (13) which has a valve (21) which can regulate the flow of air, with a gas supply duct (14) which has a valve (41) which can regulate the flow of gas, and with a mixing path (15), leading to the burner (12), of a gas/air mixture, wherein a central computing unit (28) is provided which respectively outputs at least one control variable to a regulator (26) for the control of the valve (21) and to a further regulator (46) for the control of the valve (41); and that the control variables can be compared in the regulators (26, 46) with actual values which are determined by a flow measuring device (22) of the air supply duct (13) and a flow measuring device (42) of a gas supply duct (14); and that the control variables output by the regulators (26, 46) can be adjusted on the closed-loop control systems.

Abstract: The invention relates to an apparatus for processing flat substrates by means of a corona station, comprising at least one electrode which can be connected to a high-voltage supply via connecting means, a housing device which at least partly accommodates the electrode and its connecting means, at least one counter-electrode, at least one device having at least one feed unit and at least one extraction unit for producing a gas flow which essentially has a directional component for the counter-electrode, and in which apparatus the flat substrate can be led along between the electrode and the counter-electrode, the counter-electrode being of roller-shape construction and the flat substrate bearing against the counter-electrode and being deflected from a feed direction into a direction deviating from the feed direction and being led away, and at least one extraction unit which can be adjusted from the paths of the web of the flat substrate being provided.