Patent ID: 7481077

Claim:
A device for manufacturing a preform for optical fibres, comprising a chemical deposition chamber including: at least one gripping member rotatably mounted about an axis Z-Z and adapted to hold at least one end of at least one elongated element constituting a substrate for chemical deposition for the formation of a preform for optical fibres; at least one burner which is mobile along a direction Z, which is substantially parallel to said axis Z-Z, and a mechanism to enable translation in a direction X, which is different than the direction Z, and perpendicular to a longitudinal direction of the preform, the at least one burner adapted to deposit on said at least one elongated element a chemical substance for the formation of a preform; at least one suction element positioned opposite to said at least one burner with respect to the axis Z-Z and adapted to collect exhaust chemical substances; a collector tube coupled to said at least one suction element and adapted to discharge said exhaust chemical substances from said chemical deposition chamber, the collector tube being adjacent an opening in a wall of the chemical deposition chamber and being mobile with respect to the wall along said direction X and said direction Z, the opening also being mobile in said direction X and said direction Z; and at least one air suction member provided in proximity of said at least one burner on a portion of a wall of said chamber on the opposite side to said at least one suction element; said at least one air suction member being mobile along said direction Z.