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    • 56. 发明公开
    • FLANSCHPROFIL ZUM LUFTDICHTEN VERBINDEN VON LUFTKANALABSCHNITTEN EINES LUFTKANALS
    • 法兰空气的风道气道段的紧密连接
    • EP2561284A1
    • 2013-02-27
    • EP11729248.2
    • 2011-04-20
    • Hermanussen Metallverarbeitung GmbH
    • DRAVENAU, Paul
    • F24F13/02F16L23/14E04F17/04
    • E04F17/04F16L23/14F24F13/0209
    • The invention relates to a flange profile (1) for the air-tight joining of two portions of an air duct, which flange profile is in the form of a hollow profile having a substantially L-shaped cross section and formed from folded sheet metal, wherein the L arms (2, 3) of the flange profile (1) have a double-walled form and each have an inner wall (4, 5) and an outer wall (6, 7), the walls (4, 6) of the first L arm (2) form an insertion pocket, which is open at the end, into which the wall of one of the air duct portions can be inserted, and the walls (5, 7) of the second L arm (3) form a receiving chamber (8) for receiving an arm of a corner angle piece. It is an object of the invention to provide a flange profile for the air-tight joining of two portions of an air duct, which has considerably better sealing properties compared to conventional flange profiles. To this end, the invention proposes that at least one bead (17) be formed on the inner wall (7) of the second L arm (3), which bead runs in the longitudinal extent of the flange profile (1) and protrudes away from the receiving chamber (8). In addition, the invention relates to a joining system for the air-tight joining of two air duct portions and also to an air duct having a plurality of portions joined to one another via flange profiles.