| 摘要 |
PROBLEM TO BE SOLVED: To enable a cap to be fitted to a container mouth and prevent an extraction cylinder from inclining at that time even in a synthetic resin cap provided with the extraction cylinder at an eccentric position of a cap body.SOLUTION: A synthetic resin cap 1 which can be fitted to a container mouth comprises a top cover 4 and a cap body 2. The cap body 2 has a top wall 13 and an extraction cylinder 12 erected on the top wall 13. The top cover 4 has an inner ring 10a provided so as to contact with the extraction cylinder 12 when closing the top cover 4. The extraction cylinder 12 is provided at an eccentric position of the cap body 2. One or more thin wall parts 20 are provided at a peripheral edge part 13a of the top wall 13 outside the extraction cylinder 12. |
