| 摘要 |
<P>PROBLEM TO BE SOLVED: To easily tear a score for forming an opening, and to surely form a circular opening without breakage of the support part of a pull ring during the process of pulling and tearing. <P>SOLUTION: The score 10 for forming the opening includes a circular opening line 50, and a tear guide line 52, which has an initiation point 52a inside the opening line 50 and continues to the opening line 50 from the initiation point 52a. An opening member comprises a support 13, formed near the opening line 50 and the pull ring 12 formed at the top end of the support 13. The tear guide line 52 extends from the initiation point 52a, along the base on the opening line side of the support 13 and round the support 13 so to be jointed with the opening line 50. In the areas on both sides of the intersection of the terminal end line 52e and opening line 50, thick walls for guiding a tearing motion are formed in the inside and along the opening line 50. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
