| 摘要 |
In a method of evacuating a container e.g. by a water-suction device to enable foodstuffs to be preserved, in which a plug 7 is locatable in a container aperture through which air is sucked out, the plug is drawn into the aperture after removal of the low pressure source, and during evacuation a free airway is maintained between the plug and a connecting piece 3 between the container and low pressure source. The airway may comprise radial grooves 10 in the connecting piece 3, or slits (11 Figs. 5, 6) in a plug having flanges (8 Figs. 2, 5, 6) to prevent the plug from coming out of the aperture. <IMAGE> |
