by adding materials intended to remove free oxygen or to develop inhibitor gases, e.g. vapour phase inhibitors

Full Title

Preserving, protecting or purifying packages or package contents in association with packaging (by packaging under special atmospheric or gaseous conditions B65B31/00; devices for placing protecting sheets, plugs, or wads over contents B65B61/22) > Sterilising, e.g. of complete packages > Sterilising contents prior to, or during, packaging > by adding materials intended to remove free oxygen or to develop inhibitor gases, e.g. vapour phase inhibitors