| 摘要 |
A container comprising a first layer of sheet material defining a compartment for holding a fluid mate-rial, a first peripheral edge for defining a first lateral boundary of the compartment, a second peripheral edge for defining a second lateral boundary of the container, a first end comprising an area defining an opening end and a channel having a first cross sectional diameter extending along a longitudinal axis into the compartment between the first peripheral edge and the second peripheral edge, a second end adapted to be closed defining a bottom of the compartment, a valve means for providing an automatic liquid stop for the opening into the compartment where the valve means comprises a first layer of flexible material on a first side of channel where the flexible material comprises a material that has a higher stiffness than the sheet material defining the compartment, a valve element positioned on a second side of the channel to provide an opposing force to the first layer, where the first and the valve element are joined on opposite sides of the channel via a first and a second attachment means that is adapted to restrict the first cross sectional diameter of the channel where a deflection of the flexible material in a direction substantially perpendicular to the longitudinal axis provides in-creased resistance to deflection in the direction along the longitudinal axis, so that the deflection in the first layer provides pressure towards the valve element to prevent fluid communication from the compartment to the opening end. |
