A deflation valve for use with a compression bag includes a base member and a lid member attached to the base member. The base member includes a deflation port and an inner cylindrical portion. The lid member includes a valve member and an outer cylindrical portion surrounding the valve member. The outer cylindrical portion includes an air passage portion and is arranged outwardly of the inner cylindrical portion. Suction of the deflation port causes an upward movement of the lid member to open the deflation port, imparting a negative pressure to the compression bag via the air passage portion and the deflation port. Stopping of the suction causes a downward movement of the lid member due to the negative pressure to close the deflation port with the valve member. The air passage portion serves as a finger hooking portion when opening the deflation port.
B65D 51/16 - Closures not otherwise provided for with means for venting air or gas
B65D 81/20 - Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas
A sealing fastener having unit fasteners (C) arranged adjacent to each other and each constructed from a recess member (1) and a ridge member (2) that can fit in the recess member (1). In at least any of the unit fasteners (C), the maximum width of the ridge member (2) is formed greater than the maximum width of a groove (12a) formed in the recess member (1). Further, in adjacent unit fasteners (C), when the recess members (1) and the ridge members (2) are fitted to each other, the sum of the movement distances of each side wall member (121) that forms the grooves (12a) is equal to or greater than the distance between each side wall member (121) when both members (1, 2) are not fitted to each other.
