Patent ID: 8826900

Claim:
A shutter with an inflatable seal, for a port of a hollow partition of a multi-chamber ring furnace, comprising: a rigid core of a substantially rectangular elongated shape, for placement next to a port of a hollow partition of said furnace in order to seal off the major portion of the flow area for the gas passing through said port; and at least one inflatable air chamber, which is retracted into a housing in the core in its deflated state, and which forms a peripheral seal protruding around the edge of the core in its inflated state, such that said seal extends along its entire periphery in order to complete the sealing off of said port wherein said core comprises two rigid plates, substantially of the same flat shape, rigidly fixed by spacers to be apart from and facing one another, and delimiting between said plates a housing which receives the inflatable air chamber and which is peripherally open between the two plates to allow the formation of the peripheral seal when said air chamber is in the inflated state.