IMPROVEMENTS IN, OR RELATING TO, PARTICLE CASSETTES

摘要

A method of producing a particle cassette (200) for a needleless syringe device which alleviates problems of providing a chamber (218) for the confinement of particles which is hermetically sealed from the environment. A predetermined force is applied in the longitudinal direction to push first and second cassette parts (210, 250) together so as to cause plastic deformation of a portion of the first cassette part (210) so as to create said hermetically sealed chamber (218). The cassette parts (210, 250) are preferably made of PETG and have bonded thereto rupturable membranes (202, 204) preferably made of PET. The sealing is preferably achieved at the end (220) of a protrusion (216) on the first cassette part (210) which is tapered and which interacts with the membrane (204) of the second cassette part (250).