| 摘要 |
<p>PROBLEM TO BE SOLVED: To make the state of depressed volume maintainable for a soft bag which is depressed when being empty. SOLUTION: The soft bag is made of a thermoplastic resin by blow molding and composed of a flat trunk part 1, a tapered portion 2 tapering toward the front and connected to one end of the trunk part 1 and another tapered portion 4 tapering toward the front and connected to the other end of the trunk part 1. Mouth-side ribs 6 each of which is largest in the width approximately at the center of a sloped flat wall 2a, 2b and getting smaller in the width toward positions respectively close to ridge lines of sloped and warped walls 2c and 2d while being warped in a bow-like shape are provided being opposite to each other at the tapered portion 2 on one side, and hanger-side ribs 7 each of which is largest in the width approximately at the center of a sloped flat wall 4a, 4b and getting smaller in the width toward positions respectively close to the ridge lines of the sloped and warped walls 4c and 4d while being warped in a bow-like shape are provided being opposite to each other at the tapered portion 4 on the other side.</p> |
