| 摘要 |
In the case of a method for producing a packing material from plastic film or a similar weldable material in the form of a bag or sack with side folds, the front and rear walls, as well as the side walls are formed from separate sections of material, which are connected with one another by welded seams. The material sections of the front wall and the rear wall are formed from a first and a second flat main sheet of material which, after a mutual overlapping is brought about, are conveyed in a first, common conveying direction. A third flat sheet of material is folded into a web with side folds, severed from the sections with side folds at a specified length and conveyed in a second direction transversely to the first conveying direction and placed upon one of the two main sheets of material. The bottom of the bag or sack in turn is formed by a separate material section of a fourth flat material sheet, which is brought together with at least one of the two main sheets of material, then conveyed parallel to the first conveying direction and welded together with the sections having the side walls as well as with the two main sheets of material along their adjoining side edges.
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