| 摘要 |
<p>PURPOSE:To prevent a packaged container from deforming even when a plurality of packaged containers are stacked to form a column and also prevent the containers from jamming. CONSTITUTION:A wave-formed packaging material 51 is folded in a half and both surfaces of the innermost side of a container of the opposite edge of the folded half are welded to form a vertical seal and also both surfaces of the innermost side of the container are welded perpendicularly against the vertical seal to form a side seal S1. And after the packaging material is cut off at the side seal S1, it is folded. The side seals S1 are arranged at respective side faces 50c, 50d and folded from the front face to the rear face 50b to make a fitting fin. In this case, the packaging material is only superposed double at the at the vertical seal and the side seal S1 and it is not superposed triple any where. Accordingly, the welded pressure becomes uniform at the whole area of the vertical seal and the side seal S1.</p> |
