Device for air-tight cover of a filter device

Device for air-tight cover of a filter device comprising a flat composite formed jointly reaction vessels, each having an upper and a lower opening, said upper openings are located substantially in an upper surface of the filter means, with one on the filter means surface which can be arranged elastically deformable mat, reaction vessels being located only in a partial area of ​​the filter device with the arrangement of the mat on the upper surface of the filter means saugdicht be covered, in which the mat is placed flat on the bottom of a rigid plate, the dimensions of the upper surface of the filter means are adapted and the mat is such that, for arrangement of the plate on the upper surface of the filter means surrounding the mat in sealing engagement with the respective upper wall portions of the upper openings and / or the upper openings of the areas Filtereinri rect such concluded that no air can flow between the openings at said applied to the lower openings vacuum between the mat and filter device.