BOITE D'ETANCHEITE POUR UNE ENCEINTE DE TRAITEMENT EN CONTINU DE PRODUIT MINCE EN BANDE, NOTAMMENT POUR FOUR DE CARBONISATION EN CONTINU DE SUBSTRAT FIBREUX

摘要

The inventive sealed enclosure comprises a longitudinal channel (12) which opens at a first end (12b) of the enclosure to be connected to an inlet or outlet of a treatment chamber (2), and at a second end (12a) lying opposite to the first; a support surface (14a) which is located inside the longitudinal channel and on which a continuous length of a product (T) can pass between the ends of the enclosure; and static sealing means (30), which act through contact with the continuous length of a product passing through the channel on the support surface. The static sealing means comprise at least one inflatable joint (32) which is arranged transversally in the channel (12), on the support surface (14a). Dynamic sealing means (40) are also provided in the channel, between the second end (12a) of the enclosure and the static sealing means and comprise means (52, 56) for injecting gas into at least one chamber (42, 46) that is formed in the channel. The sealing enclosure is especially suitable for an oven for producing carbon fibre fabric by continuous carbonisation of a fabric consisting of a precursor of carbon.