| 摘要 |
PROBLEM TO BE SOLVED: To enable easy peeling with a finger tip hooked on an opening and also improve adhesion between a cover member and a cap top face for preventing erroneous peeling, by forming an easy-to-tear means at an end rim in contact with the cap top face of the cover member. SOLUTION: An easy-to-tear means 4 is provided at a single or a plurality of sites on an end rim 3a of a cover member 3 in contact with a cap top face 2a. The easy-to-tear means 4 is simultaneously formed by providing a cut by a usual cutter when the cover means 3 is cut into a predetermined size. The cut depth is sized to be received in the cap top face 2a and sized to obtain a tearing piece 5 with an opening 4a formed along an internal periphery of the end rim 3a when the cover means 3 is stretched by heat shrinkage. By forming the easy-to-tear means 4 at a plurality of sites, the tearing piece 5 formed between a pair of the means 4 is like a tab, so that a finger tip or the like can be easily hooked and removal of the member 3 is easy. |
