Patent ID: 7661423

Claim:
A method of securing a cap structure to a container configured to contain a fluid medicament, the container having an end surface and a neck underneath the end surface, the neck having a surface which tapers outwardly in a direction towards the end surface, and the cap structure having: a cap member which is slidingly receivable on the end surface and which presents a bearing surface configured to bear against the end surface, a sleeve configured to be disposed about the neck, and a split collar which is an annular member having a pair of free ends that are circumferentially separated from each other by a split through the annular member, said method comprising: affixing the split collar around the neck of the container, sliding the cap member onto the end surface so that the bearing surface bears against the end surface and the sleeve is disposed around the neck, moving the split collar over the neck surface towards the end surface until the split collar is wedged between an inner surface of the sleeve of the cap member and the neck surface, and forming a joint between the sleeve inner surface and the split collar.