| abstract |
A syringe (and a prefilled syringe) of a structurenwith ventilation means allowing a pusher to be easilynpushed or pulled in use, providing an excellent operabilitynof discharging (injecting) chemicals, making it hard fornforeign matter such as dirt and dust to enter into ansyringe outer tube when not in use during storage orntransporation, capable of assuring, by itself, thensanitation of the syringe outer tube when not in use, andnallowed to be shipped without individually packaging thensyringe with packaging material, wherein, as more desirablenembodiments, the aseptic condition in the outer tube can bensurely maintained even if the push and pull operations ofnthe pusher are performed and, even if the pusher is pushednwhen not in use, a gasket does not move in tip directionnand the arrangement of the pusher at the time of shippingncan be stably maintained. |