公开(公告)号：US11673822B2

公开(公告)日：2023-06-13

申请号：US16464231

申请日：2017-11-30

Applicant: CORNING INCORPORATED

Inventor： Adam Charles Berkey ,  Eliot Geathers ,  Daniel Warren Hawtof ,  Douglas Edward McElheny ,  Jiandong Meng ,  Elias Panides ,  Gaozhu Peng ,  Randy Lee Rhoads ,  Yuriy Yurkovskyy ,  Chunfeng Zhou

IPC: C03B17/04

CPC classification number: C03B17/04

Abstract: A glass tube manufacturing apparatus for manufacturing glass tubing includes a glass delivery tank with molten glass. The glass delivery tank has a bottom opening. A bell has an upper portion with an outer diameter located at the bottom opening. A heating apparatus is at least partially disposed around the bell. The heating apparatus includes a heated portion and a muffle portion located below the heated portion. A lower extended muffle structure extends downwardly from the muffle portion. The lower extended muffle structure extending about the glass tubing on all sides to manage convective airflow therethrough.

公开(公告)号：US20190284081A1

公开(公告)日：2019-09-19

申请号：US16464231

申请日：2017-11-30

Applicant: CORNING INCORPORATED

Inventor： Adam Charles Berkey ,  Eliot Geathers ,  Daniel Warren Hawtof ,  Douglas Edward McElheny ,  Jiandong Meng ,  Elias Panides ,  Gaozhu Peng ,  Randy Lee Rhoads ,  Yuriy Yurkovskyy ,  Chunfeng Zhou

IPC: C03B17/04

Abstract: A glass tube manufacturing apparatus for manufacturing glass tubing includes a glass delivery tank with molten glass. The glass delivery tank has a bottom opening. A bell has an upper portion with an outer diameter located at the bottom opening. A heating apparatus is at least partially disposed around the bell. The heating apparatus includes a heating portion and a muffle portion located below the heating portion. A lower extended muffle structure extends downwardly from the muffle portion. The lower extended muffle structure extending about a periphery of the glass tubing to manage convective airflow therethrough.