Schott Pharma Ag & Co Kgaa

Schott Pharma Schweiz Ag

Schott Ag

Roman Oberhänsli

Andreas Langsdorf

Peter Thomas

Martha Strassmann

Ivo Andreoli

Xaver Jud

Hanspeter Kummer

A glass syringe barrel is provided that has an at least partially conically shaped upper portion and a longitudinal axis. The glass syringe barrel has a top end through which a liquid can be ejected and a bottom end into which a plunger stopper can be pushed. The glass syringe barrel includes, in a direction from the top end to the bottom end, a cone, a shoulder region, and a body region. The shoulder region has and outer contour that has a concave and substantially circular arc-shaped area cwith an outer radius r. The outer contour of the glass syringe barrel in the shoulder region is defined by a certain minimum value the radius of curvature.

Glass syringe barrels with increased cone breaking forces

A method for shaping the mouth of a hollow precursor made of glass is provided, as well as glass produced thereby. The method includes heating the mouth of the hollow precursor; introducing a mandrel along a first direction into the mouth while the hollow precursor is rotating; and pressing shaping rollers along a second direction on an outside of the mouth while the hollow precursor is rotating with the mandrel in the mouth. The first and second directions are perpendicular to one another. The method can include moving the mandrel along second and/or third directions together or separate from expanding the mandrel along the second and third directions.

Installation, device, and method for shaping the mouth of a hollow-body-shaped precursor from glass

A glass syringe barrel is provided that has an at least partially conically shaped upper portion and a longitudinal axis. The glass syringe barrel has a top end through which a liquid can be ejected and a bottom end into which a plunger stopper can be pushed. The glass syringe barrel includes, in a direction from the top end to the bottom end, a cone, a shoulder region, and a body region. The shoulder region has and outer contour that has a concave and substantially circular arc-shaped area ci with an outer radius r. The outer contour of the glass syringe barrel in the shoulder region is defined by a certain value for r.

Growing community of inventors

St.Gallen, Switzerland

Roman Oberhänsli