Glass container comprising a glass bottom with improved properties

US11806716B2 · kind B2 · utility

Assignees

• SCHOTT PHARMA AG & CO. KGAA · DE
• SCHOTT PHARMA SCHWEIZ AG · CH

Inventors

• Robert Frost · Eggersriet, CH
• Doris Moseler · Budenheim, DE
• Günter Weidmann · Stuttgart, DE
• Roman Huhn · Sankt Gallen, CH
• Jens Ulrich Thomas · Mainz, DE
• Alexander Humbertjean · Bad Krozingen, DE
• Frank-Thomas Lentes · Bingen, DE
• Andreas Langsdorf · Ingelheim am Rhein, DE

Key dates

• Filing date: Dec 18, 2020
• Grant date: Nov 7, 2023
• Expiry date: Mar 13, 2042

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01L2300/0851
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A glass container is provided that includes a tube, a circular bottom, and a longitudinal axis. A curved glass heel extends from an outer end the bottom to the first end of the tube. The two-dimensional distance h(x,y) between a contact plane and the outer surface. The two-dimensional distance is measured in a direction parallel to the axis. The slope magnitude of the outer surface at the given position x,y is given by √{square root over ((dh/dx)2+(dh/dy)2)}. The 75% quantile of values that have been determined for the term √{square root over ((dh/dx)2+(dh/dy)2)}×d1/h(xy)delta for all given positions x,y within a circular area having a radius of 0.4×d2/2 and that correspond to the centre is less than 4100 μm/mm. The adjacent positions x,y increase stepwise by 200 μm, and h(x,y)delta=h(x,y)max−h(x,y)min, h(x,y)max is a maximum value for h(x,y) and h(x,y)min is a minimum value for h(x,y) being determined in that circular area.