| 摘要 |
This cushioned bag includes a double layer of plastic with longitudinal columns formed therebetween. The columns contain cushioning material such as air. The bag has a tubular outer portion providing an outer wall and an inner portion providing an inner wall and cooperating with the outer wall to define the columns. The inner wall is connected to the outer wall intermediate to the columns. The method of manufacturing the cushioned bag comprises the steps of extruding the outer tubular member, extruding the inner tubular member having castled portions spaced from the outer member, sealing the inner member to the outer member between the castled portions, cutting the tubular members into individual bag lengths, sealing one end of the cut tubular members to provide a closed bottom portion and sealing the other end of the outer tubular member to the castled portions to provide closed upper ends of the castled portions.
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