Patent ID: 7021083
Filing Date: 2006-04-04
Classification: C03B

Abstract:
1. A method of fabricating a glass tube, comprising: providing a starting member having an axis and arranged for deposition of a soot at a given axial end of the member; applying a first soot on the end of the starting member in such a manner as to form an elongated cylindrical soot core having a first density and which is substantially axially aligned with the starting member; applying a second soot including SiO heating the soot body at a temperature sufficient for sintering the soot core and the soot cladding into a core glass and a cladding glass, wherein the core glass collapses at a greater rate than the cladding glass and the core glass separates radially from the cladding glass; and removing the core glass from inside the cladding glass to yield a glass tube.