Injection syringe

An injection syringe (1), comprising an elongated barrel (2) with an outlet end with a substantially conical flare (2.6) with a semi-ellipsoidal inner wall (2.7), a semi-ellipsoidal capsule (6) when empty and ellipsoidal when filled, a device (2.15, 6.4) for removable attachment of the capsule to the discharge end of the barrel, to form the barrel end wall, and a plunger (4) fitted for reciprocating movement in the barrel, the capsule having an essentially rigid first portion (6.1) on the outside of the end wall, forming an external surface, a flexible second portion (6.8) on the inside of the end wall, which is compressible against the internal surface of the first section of the wall, and a nozzle (6.2) on the said first section of the wall for attaching a cannula or needle thereto, characterized by the fact that the barrel capacity of the plunger (4) between the displacement positions of the plunger, corresponding to empty and filled capsules (6), is essentially equal to the volume of the capsule, and that the plunger (4) comprises a plunger rod (4.1) with a body (4.2) and a head (4.3), and a hollow plunger packing (5) made of elastic material which, when unloaded, tightly encloses part of the body (4.2) and the long sides of the head (4.3) but not its nose portion (4.15);

• and an end wall (5.3) of the plunger packing is at a distance from a nose portion (4.15) on the plunger head.