| 摘要 |
<p>Bell-type furnace, in particular for bringing about the annealing of sheet metal in coils in a controlled atmosphere, which comprises a fixed base provided with a support plate, on which the pile(s) of coils rest, an internal cover, which insulates the charge from the ambient atmosphere and rests on said base with interposition of an annular seal, and a furnace which is provided with the means of heating and which comes to cover the cover, characterised in that a semi-impermeable barrier (22, 24, 26) is made between the internal capacity (C) of said internal cover and the annular space (A) separating the circular lateral wall (28) of the periphery of the base and said internal cover, and in that means are provided which limit the temperature of the lower collar. <IMAGE></p> |
