| 摘要 |
A gas feed arrangement for supplying gas into bags in a packaging machine is disclosed. A belt-like film is tubulated by a tube former and, as articles to be packaged are supplied into the tubulated film, both the tubulated film and the articles are transported while being held between a pair of tension conveyors. Double pipes, each consisting of an outer evacuation pipe and an inner gas jet pipe, are inserted into the tubulated film. The locations for evacuation and gas blow by the inner and outer pipes within the film are spaced from each other a distance corresponding to a length of more than one article. Cushion blocks provided in multiplicities on a pair of tension belts exert pressure against the film from opposite sides thereby to eliminate any superfluous space within the film and, at same time, to isolate adjacent articles from each other. Thus, the oxygen present in each bag is efficiently displaced by inert gas fed into the bag, and the required inert gas consumption can be minimized. |
