| 摘要 |
PURPOSE:To prevent unrightful unsealing by a device wherein the lid can not be lifted from the spout unless a pull tab for unsealing at the outer lower end of an unsealing piece is raised to break fragile lines in the-left and right sides and disengage a fastening projection at the inner lower end from a fastening ring in the spout. CONSTITUTION:In a mouth cap 100 the outer circular surface in the lower part of a lid 110 is joined with the outer circular surface of a spout 120 with a connecting strap 130 therebetween. In this instance a fastening hollow 125 for the fastening to the wall board 11 of a paper container for liquid is formed in the outer circular side of the lower end of a ring-shaped base 124 of the spout 120 and a cylindrical circular wall 121 having a fastening ring 123 on the outer circular side is erected on the upper end of the ring-shaped base 124. On the outer circular surface of a circular wall 114 at a position opposite to the connecting strap 130 an unsealing piece 116 is provided, which is connected at its upper end to the roof 111 with a hinge 115 therebetween. On the other hand, at the lower end of the unsealing piece 116 a pull tab for unsealing 117 is provided on the outer side and a fastening projection 118 which engages with a fastening ring 123, on the inner side. The left side and right side are joined to the circular wall 114 with the interposition of fragile lines respectively. |
