| 摘要 |
The application describes a valve bag made of paper, in which bag there is made a valve bottom by folding end flaps (5, 5') inwardly from the edges of a flattened tube-like blank, and by folding side flaps (12) from the blank sides on top of said end flaps. The bottom is provided, on the inside of the side flaps (12), with an inner bottom patch (7) that extends from one end flap (5) to the other (5'). The application also describes a method of manufacturing. |
