Glass tube element with improved quality

US12043561B2 · kind B2 · utility

Assignee

• Schott AG · DE

Inventors

• Volker Trinks · Mitterteich, DE
• André Witzmann · Waldershof, DE

Key dates

• Filing date: Apr 29, 2023
• Grant date: Jul 23, 2024
• Expiry date: Apr 29, 2043

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03B23/055
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A glass tube element having a hollow cylindrical section with a shell having an outer diameter is provided. A first ratio is a difference value to a mean value. The difference value is a difference of a minimal and maximal value of the outer diameter. The mean value is a mean of the minimal and maximal values. A sub-section having a start, an end, and a distance of 1 meter measured along a straight line from the start to the end and intersecting with a center axis of the sub-section at the start and the end. The sub-section having, for every point of the center axis, a shortest distance to the straight line. A second ratio of a specific distance to 1 meter, the specific distance being defined as a largest of all shortest distances. A product of the first and second ratio is smaller than 4×10−6.