EP1036568A1 — Vacuum syringe and method of manufacturing the same

USPTO Abstract

The invention provides a reduced-pressure syringe for storing a freeze-dried agent therein under reduced pressure as well as a method for manufacturing the reduced-pressure syringe. A specified amount of a chemical is injected into a cartridge 12 with the one end 12a of the cartridge 12 down. The gasket 20 is plugged halfway on the other end 12b side of the cartridge 12, so that the cartridge 12 is made communicating between inside and outside by the recessed groove 22, in which state the chemical is freeze-dried. The sealing cap 30 is overlaid on an upper end face of the gasket 20 and the sealing cap 30 is pushed in the reduced-pressure atmosphere so that the other end 12b side of the cartridge 12 is sealed by the gasket 20 and the sealing cap 30. The sealing cap 30 is engaged with an end face of the cartridge 12 on the other end 12b side, thereby being prevented from moving into the cartridge 12.