| 摘要 |
A bag or sack made from two layers of flexible thermoplastic film with welded borders is provided with a pouring spout having a forked root with wedge-shaped branches onto which the opposing layers of film can be sealed. A passage through the junction of the root allows material to pass from the bag to the spout, or vice versa. Pref. the spout with its integral root is made of a thermoplastic material, by injection moulding. |
