| 摘要 |
<p>A paper sack to be used for flour (or other granular or particulate material), having single - or multi-ply walls, has a pasted block bottom. The block bottom is designed so that it can be readily torn open to allow the sack contents to be poured out avoiding contamination by adhesive or torn paper fragments. Two identical tapezium-shaped flaps (J,K) form the block bottom and onto these is pasted a rectangular label (R) leaving an un-pasted gap (S) where one can insert one's hand and pull open the pouring opening (P). <IMAGE></p> |
