| 摘要 |
PROBLEM TO BE SOLVED: To form a code mark (48) indicating pieces of information about production of a lid (6) before attaching the lid (6) to a neck (4) of a container (2) without breaking the container by actuation of an attachment tool (50) to the lid (6) when the lid (6) is attached to the neck (4), in a manner that it does not make consumers troublesome.SOLUTION: A code mark (48) indicating pieces of information about production of a lid (6) is formed in an invisible state on an outer face of a top face wall (14) or an outer face lower half part of a main part (20) of a skirt wall (16) of the lid (6). |
