Device for producing a glass rod

US7343761B2 · kind B2 · utility

Assignee

• Carl Zeiss Stiftung · DE

Inventors

• Erhard Dick · Mitterteich, DE
• Roland Fuchs · Mitterteich, DE
• Erich Fischer · Altdorf, DE
• Wolfgang Münch · Bubenheim, DE
• Anton Winkelmann · Ober-Olm, DE
• Robert C. Ruhl · Cleveland Heights, US

Key dates

• Filing date: Aug 14, 2001
• Grant date: Mar 18, 2008
• Expiry date: Jan 16, 2023

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03B17/04
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A device for the production of a glass rod is provided. The device has a Danner blowpipe constructed to avoid problems attributed to different heat expansion coefficients of the participating materials. The Danner blowpipe has an outer metal jacket surrounding a ceramic body and defines a supply end and a discharge end of the blowpipe. A clamping plate is provided at both the supply and discharge ends. The clamping plate on the discharge end is rigidly joined with a shaft and engages the outer metal jacket at the discharge end. The clamping plate on the supply end is joined in an axially displaceable manner on the shaft, which is rigidly joined with a pressure plate against displacement in an axial direction. A pressure spring is disposed between the pressure plate and the clamping plate on the supply end to urge the plates away from one another.