Closure having a seal piercing unit

摘要

A seal covering a discharge port of a container is opened without leaving superfluous elements on the container by a container closure unit which has seal-piercing knife-like elements mounted on a flexible dome-shaped base which is located to place the knife-like elements adjacent to the seal. The dome-shaped base is flexed to move the knife-like elements through the seal and then to move them outwardly toward the periphery of the seal to cut slits in the seal. The slits act as fluid passages to permit decanting of the fluid from the container. Once the seal has been opened, the dome-shaped base is removed using a pull ring and discarded. The container closure unit has a cap which is used to close the container discharge port between uses.

主权项

1. A closure unit for opening a seal covering a discharge port of a container comprising:
a base configured to secure to the container; a tubular portion extending upwardly from the base; a flexible base section mounted to the tubular portion by a line of weakness and mounted adjacent to a seal covering a discharge port of a container, the flexible base section being movable between a first position with respect to the seal and a second position with respect to the seal with the second position being closer to the seal than the first position; at least one seal piercing element mounted on the flexible base section to move therewith; the flexible base section and the at least one seal piercing element being oriented and positioned relative to the seal to move the at least one seal piercing element through the seal and to cut at least one slit in the seal when the flexible base section moves from the first position thereof to the second position thereof; a pull ring attached to the flexible base section which permits the flexible base section to be removed from the tubular portion when the line of weakness is broken.