Patent ID: 8348903

Claim:
A cartridge for the packaging of a pharmaceutical comprising a plastic barrel, closed at one end by a cap and at the other end by a piston, wherein said cap is provided at least partly with: a shoulder cooperating with the barrel in a double-level snap-on system; a cavity configured to accommodate an elastomeric protection sleeve of injection means fitting, to make a seal, said cap being terminated at a first end by a peel-off porous liner covering said cavity; a first plurality of radial fins protruding inside said cavity, for screwing the injection means fitting and with a second plurality of radial fins protruding on the outside of the cap to ensure fixation of the cap into a cartridge protection shield; a second end opposite to the first end and facing the barrel, shaped so to minimize a shadow area in the case of UV flash lamp sterilization and to ensure sufficient clearance for inserting a spike of the injection means, said second end being closed and having a reduced wall thickness for acting as a septum to be pierced by said spike at the time of setting up for dispensing the pharmaceutical to a patient; an external cylindrical zone at the second end to ensure leak tightness between the cap and the surrounding barrel; the barrel being provided at least partly with: a first neck with staged shoulders or bosses for cooperating with the shoulder of the cap in a double-level snap-on system; a second neck with internal axial flutes for evacuating air when closing the barrel with the cap; a third neck with a perfectly cylindrical leak tightness area; a barrel body shaped to allow suitable exposure to light throughout a wetted area, said body being made of a material transparent to UV light, a rest area with a slightly increased internal diameter at the opposite side of said necks, for fitting the piston in the barrel.