| 摘要 |
PURPOSE: To enable to visually check if the seal is opened or not, and to recover the original sealing level when the pouring mouth is closed again after the seal is opened. CONSTITUTION: This closure unit consists of a pouring part 11 and a closure part to open and close a pouring mouth, and an engaging connecting part constituted by engaging a region of a material with a region of another material is formed between the pouring part 11 and the closure part 12. The engaging connecting part is made so as no more to be engaged again when the engagement is released in seal opening and the closure part 12 is set in a closure state. The engaging connecting part can be constituted with at least one mold engaging means 15, 16 formed with either one of the closure part 12 and the pouring part 11 and with a groove formed corresponding to the mold engaging means 15, 16 in the other part. In that case, the mold engaging means 15, 16 are set at a strength with which the closure part 12 can not be fit in the groove again after the closure part 12 is released. |
