Patent ID: 7461524
Filing Date: 2008-12-09
Classification: C03B,Y02P

Abstract:
1. A method for manufacturing a preform for optical fibres, comprising the following steps: (a) supporting at least one substrate for chemical deposition in a vertical position along an axis Z-Z; (b) rotating said at least one substrate about said axis Z-Z; (c) directing onto said at least one substrate a flow of at least one chemical substance generated by the emission of reactant gases and of at least one combustible gas by at least one burner, said at least one chemical substance being suitable to be deposited around said at least one substrate for forming at least one preform; (d) sucking the non-deposited part of said at least one chemical substance through at least one suction element arranged on the opposite side to said at least one substrate with respect to said at least one burner; and (e) moving said at least one burner and said at least one suction element parallel to said axis Z-Z; wherein the step of moving said at least one burner and said at least one suction element further comprises the step of keeping said at least one suction element always at a lower height with respect to that of said at least one burner.