Novo Nordisk A/S
Method of manufacturing one of a range of autoinjectors

Abstract:

A method of manufacturing one of a range of autoinjectors having cartridges (600, 600', 600'') with different preset fill volumes, the method comprising the steps of: a) providing a front body assembly (100b, 100c, 100c', 100c''), b) providing a cartridge (600, 600', 600'') of given fill volume, c) providing a rear body assembly (100a) comprising a spring-driven drive ram assembly (310, 320) configured to drive the piston of a held cartridge (600, 600', 600''), d) providing a ram spacer member (400, 400', 400''), the ram spacer member defining a spacing geometry of length dimension (X1', X1'', X1''', XS', XS'', XS''', XR', XR'', XR''') selected according to the fill volume of the cartridge (600, 600', 600''), and e) assembling a front body assembly (100b, 100c, 100c', 100c''), the cartridge (600, 600', 600''), the ram spacer member (400, 400', 400'') and the rear body assembly (100a) so that the ram spacer member (400, 400', 400'') is arranged axially between the drive ram assembly (310, 320) of the rear body assembly (100a) and the piston of a held cartridge (600, 600', 600'').