| 摘要 |
A device for the production of tubes or sections of tubes, from which paper bags can be manufactured. The tubes or sections of tubes have at least one paper layer. The device has the following components: an unwinder device for unrolling at least one material web from a material web roll a device for the provision of at least one edge region of each material web with glue. a tube forming device by means of which the edge region provided with glue can be inverted onto the second edge region, and can as such be attached to the same. The tubes or pieces of tube can be provided with air-permeable channels in the device. The device for providing at least one edge area of each material web with glue has glue application valves, wherein at least two glue application valves are functionally assigned to each material web, and broken glue tracks can be produced with said glue application valves, and wherein the breaks form air-permeable channels.
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