Integrally sealed container with cap

Abstract

A sterile pack comprising, in combination, a moulded plastics container (1) to which is attached a moulded plastics cap (20), the container being integrally sealed at its upper end, the neck of the container being provided with thread (3), an annular portion (10) of the neck above the thread being frangible, and the cap having a thread complementary with the container thread and means for contacting the container above the said annular portion, is characterized in that the thread (3) has a pitch of between 0.05 and 0.095 turns per millimeter per millimeter of thread diameter, and that the diameter of the frangible portion (10) of the container is at most 80% of the thread diameter. The container is opened by screwing the cap further onto the container, so that the container-contacting part of the cap above the frangible portion causes relative movement between the top of the container and the remainder thereof, thus breaking the frangible portion of the container, and then unscrewing the cap, in the normal way, to remove the sheared-off upper part of the container from the rest of the container, and expose the contents of the container.

Dependencies are inferred from the claim text.