Method and apparatus for controlling glass tube taper
US11673822B2 · kind B2 · utility
0Cited by
25References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 30, 2017 |
| Grant date | Jun 13, 2023 |
| Priority date | — |
| Expiry date | Mar 25, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B17/04
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.