Patent ID: 8790231

Claim:
A device for the production of tubes or sections of tubes having at least one layer of material, from which bags are manufactured, comprises: an unwinder device for unrolling at least one material web from a material web roll; a device for providing at least one edge region of the at least one material web with a glue; and a tube forming device via which the edge region provided with glue is inverted onto, and attached to, a second edge region, such that the tubes or sections of tubes are provided with air-permeable channels therein, the device for providing the at least one edge area of each material web with the glue having at least a first glue application valve and a second glue application valve associated therewith, with the first and second glue application valves providing corresponding first and second glue tracks that each include a plurality of glue track sections and a plurality of glue track breaks, with the glue track breaks providing the air-permeable channels, with a glue track section of the first glue track (i) covering a glue track break of the second glue track and (ii) overlapping an adjoining glue track section of the second glue track.