| 摘要 |
<p>The bag may be made of paper or plastic film and has a base which is fitted with a filling facility, located within one of the folds of the base. This allows the filling opening to be held wide open for filling or folded over and closed after filling. The edge of the opening is provided with an adhesive which may be either a contact adhesive or protected by a cover sheet (11). The opposite corner (13) of the cover sheet (11), is free from adhesive s that the cover can be handled. The sides of the sacs (4, 5) may also be folded back for storage.</p> |
