Cartridge, dispensing assembly and method of manufacturing a cartridge
AssigneeMedmix Switzerland AG
InventorsPhilipp Seiler, Tobias Bodenmüller
Life of this patent
Estimating the term…
Abstract
A cartridge for a medium to be dispensed includes a rigid head part having a dispensing outlet and a flexible film forming a cartridge wall. The film bounds a cartridge chamber for the medium and extends partially in a longitudinal direction of the cartridge. The head part includes a collar surrounding the dispensing outlet in a radially outer region of the head part, and the collar extends in the longitudinal direction and has an inner circumferential surface. A front end of the film is sealingly and non-releasably connected to the inner circumferential surface of the collar. Attachment of the film to the inner circumferential surface of the head part is at a contact surface that is different from the outer surface of the film.
Claims24
A cartridge for a medium to be dispensed comprising:
- a rigid head part having a dispensing outlet;
- and
- a flexible film forming a cartridge wall, with the film comprising at least one inner surface and an outer surface, and with the film bounding a cartridge chamber for the medium to be dispensed, extending at least partially in a longitudinal direction of the cartridge and having a front end that is connected to the head part, the head part comprising a collar, with the collar surrounding the dispensing outlet in a radially outer region of the head part, extending in the longitudinal direction and having an inner circumferential surface, and the front end of the film being sealingly and non-releasably connected to the inner circumferential surface of the collar, and the inner circumferential surface of the collar being attached to the film at a contact surface that is different from the outer surface of the film,
- the film being a multilayer film comprising an outermost layer defining the outer surface of the film, the multilayer film comprising at least one inner layer arranged radially inwardly of the outermost layer, the outermost layer and the at least one inner layer are formed from different materials, and the contact surface being the at least one inner layer of the multilayer film, and
- a material of the outermost layer of the film and a material of the collar being different and are materials which do not bond or bond less strongly one to another than a bond formed between a material of the at least one inner layer of the film and the material of the collar, the head part formed by injection molding, and the material of the outermost layer is configured to melt away in a region of the contact surface of the front end of the film due to a processing temperature during an injection molding process so that the at least one inner layer and the inner circumferential surface of the collar are bonded one to another during the injection molding process.
Dependencies are inferred from the claim text.