| 摘要 |
The method of manufacturing bags from layflat tubing has, prior to sealing transversely across the tubing, lateral side portions folded to form gussets extending inwardly to a depth not greater than one third the width of the gusseted tubing. Each gusseted side portion is folded over about a longitudinal fold line onto the medial tubing portion between said side portions. The longitudinal fold lines substantially coincide with inner edges of the gussets. |
