Patent ID: 8561432
Filing Date: 2013-10-22
Classification: C03B

Abstract:
1. An apparatus for fabricating porous glass preforms by depositing glass particles synthesized by a flame hydrolysis or oxidation reaction using a burner onto a deposition base material, the apparatus comprising a burner and a reaction vessel used for forming the porous glass preforms, a wall of the reaction vessel comprising: a plurality of rectangular inner wall metal plates having an inner surface and an opposing outer surface, the inner surface defining at least a part of inner side walls of the reaction vessel, adjacent inner wall metal plates of the plurality of inner wall metal plates being weld bonded at their edges; and a plurality of metal frame members having a higher stiffness than that of the inner wall metal plates, the metal frame members being positioned against the outer surface along each edge region of the plurality of inner wall metal plates, each metal frame member being fixed to the corresponding edge region by a tightening or welding means, so that all of the edge regions have a metal frame member fixed thereto.