Cap seal for container such as drum, and doubly-sealing apparatus of container such as drum using the same

摘要

A cap seal and a doubly-sealing apparatus of a container such as a drum using the same, which execute a reliable sealing function of a cap part of the container such as the drum. Double sealing of the cap part of the container such as the drum due to the cap seal is fully performed despite various errors such as the difference in the curling external diameter of the cap part of the container.