The invention relates to a device (100) for the thermal treatment of a web-shaped textile material web by means of hot gases, in particular for the consolidation of a non-woven fabric comprising at least partially thermally fusible fibers and / or filaments made of one or more layers, with at least one within a treatment room exposed to hot air rotatably mounted drum (5) with a perforated, gas-permeable jacket surface, which is at least partially wrapped by the web to be treated, one of the at least one drum (5) associated suction through which the at least one drum (5) is placed under suction so that the hot air flows from the treatment room through the web to be treated, the jacket of the at least one drum (5) being enclosed by a screen fabric (8) on which a structural shell (9) rests or is attached, which has a plurality of openings for The invention is characterized in that the screen mesh (8) is arranged on the underside of the structural shell (9) and the structural shell (9) with the screen mesh (8) are arranged at a distance from the outer surface of the at least one drum (5).
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