GLASS SYRINGE BARREL WITH INCREASED CONE BREAKING FORCE

The glass syringe barrel has an at least partially conical upper portion and has a longitudinal axis. The glass syringe barrel includes a top end through which liquid can be jetted and a bottom end into which the plunger stopper can be pushed. Also included is (1) a tapered region having a first end and a second end, the first end corresponding to the top end of the glass syringe barrel, the tapered region having a length and an outer diameter at the second end; (2) a shoulder region having a first end and a second end, the first end being adjacent to the second end of the tapered region, theouter contour of the shoulder region comprising a concave and substantially arcuate region starting below the second end of the tapered region, the outer radius of which is r1, and a convex and substantially arcuate region starting above the second end of the shoulder region, the outer radius of which is r2; (3) a body region having a first end and a second end, the first end being adjacent to thesecond end of the shoulde