公开(公告)号：US20170349474A1

公开(公告)日：2017-12-07

申请号：US15616273

申请日：2017-06-07

Applicant: Corning Incorporated

Inventor： Martin Wade Allen ,  Laura Beth Cook ,  Tonia Havewala Fletcher ,  Daniel Warren Hawtof ,  Paul Anthony Jakobson ,  David John McEnroe ,  Aniello Mario Palumbo

IPC: C03B23/07 ,  C03B23/047

CPC classification number: C03B23/07 ,  C03B23/047 ,  C03B23/0476 ,  Y02P40/57

Abstract: Methods of forming a glass tube are described. In one embodiment, the method includes heating a glass boule to a temperature above a glass transition temperature of the glass boule, drawing the glass tube from the glass boule in a vertically downward direction, and flowing a pressurized gas through a channel of the glass boule as the glass tube is drawn. The glass boule includes an outer surface defining an outer diameter of the glass boule and a channel extending through the glass boule defining an inner diameter of the glass boule. Drawing the glass tube decreases the outer diameter of the glass boule to an outer diameter of the glass tube and flowing the pressurized gas through the channel increases the inner diameter of the glass boule to an inner diameter of the glass tube. Glass boules, glass tubes, and apparatuses for making the same are also described.