| 摘要 |
PURPOSE: To provide a closure unit which has an appropriate strength and can stably pour a sufficient quantity of fluid without increasing its weight. CONSTITUTION: This closure unit consists of substantially a tubular pouring part 11 and a closure part 12 which opens and closes a pouring mouth 30 of the pouring part 11, and on the inside of the pouring part 11 at least one rib 26-29 is protrudingly formed in the direction of fluid flowing in pouring. Since the ribs 26-29 are provided, the fluid is guided by the ribs 26-29 and poured in stable flow along the ribs 26-29 when the fluid is poured. And, the ribs 26-29 reinforce the pouring part 11. The reinforcement of the pouring part 11 by the ribs 26-29 allows to reduce the wall thickness of the pouring part 11. |
