METHOD FOR MANUFACTURE OF PLASTIC PREFILLED BARREL Russian patent published in 1997 - IPC

FIELD: medicine, in particular, production of prefilled syringe barrels. SUBSTANCE: method involves press molding barrel casing with upper and lower open ends in sterile medium; press molding plastic tip integral with injection needle fastening device and cover, which is joined through fragile connection with tip in sterile medium; introducing preliminarily sterilized piston into lower end of barrel casing in sterile medium; hermetically sealing tip on barrel casing in sterile medium; hermetically connecting tip with upper end of barrel casing by welding in sterile medium, for instance, by ultrasonic welding. Additional cap is formed by press molding in sterile medium and put onto tip upon hermetical connection of tip with upper end of barrel casing. Additional cap is preliminarily sterilized, introduced into sterile medium and put onto tip. EFFECT: increased efficiency and simplified method. 3 cl, 3 dwg