Plastic syringe

Claim 1

A PLASTIC SYRINGE COMPRISING: A SUBSTANTIALLY CYLINDRICAL BARREL HAVING ONE OPEN END AND A PARTIALLY CLOSED FRUSTO-CONICAL END OPPOSITE SAID OPEN END WITH AN OPENING EXTENDING THEREFROM FOR EJECTION OF FLUID FROM SAID BARREL, A PLUNGER MOUNTED FOR LONGITUDINAL AXIAL MOVEMENT WITHIN SAID BARREL AND HAVING A BODY PORTION EXTENDING OUTWARDLY THROUGH THE OPEN END OF SAID BARREL, AND A PLASTIC PLUNGER SEALING TIP CONNECTED TO SAID PLUNGER AND HAVING A CONICAL NOSE PORTION COMPLEMENTARY TO SAID FRUSTO-CONICAL END OF SAID BARREL, SAID NOSE PORTION BEING INTEGRALY FORMED WITH A CYLINDRICAL SLEEVE, SAID PLUNGER SEALING TIP HAVING A THIN ANNULAR SKIRT WITH A SHALLOW ANNULAR RECESS FORMING NARROW ANNULAR RINGS AT THE INNER AND OUTER ENDS OF SAID SKIRT WITH PERIPHERAL ANNULAR SURFACES CONTACTING THE WALLS OF SAID BARREL, AND A NARROW FLEXIBLE ANNULAR WEB INTEGRALLY FORMED AND INTERCONNECTING SAID ANNULAR SKIRT AND SAID CYLINDRICAL SLEEVE AND NOSE PORTION, SAID ANNULAR SKIRT BEING UNDERCUT TO PROVIDE FLEXIBILITY AND RELATIVE MOVEMENT WITH RESPECT TO SAID PLUNGER AND SAID CYLINDRICAL SLEEVE.