| 摘要 |
PURPOSE: To provide a low-priced one-way valve which is usable for any kinds of products regardless of their viscosity. CONSTITUTION: A one-way valve is provided with a flap 4 formed by a partially elastic element comprising a rigid part 5 fixed to a container 1 containing a viscous product 2 partially elastic element comprising a rigid part 5 by a hooking means 6, and an elastic part 8 elastically abutting against a sealing zone 9 which is integral with the container. The one-way valve comprises adjusting means 11 and 12 for adjusting the abutting force of the elastic part against the sealing zone. The adjusting means also form the hooking means. |
