| 主权项 |
1. A gastight valve strip for a reclosable container, the reclosable container having a container aperture through a sidewall of the container, the valve strip comprising:
(i) a first film layer having a periphery; (ii) a second film layer opposing the first film layer and being attached to the first film layer, the first and second film layers adapted to be disposed over a container aperture through a sidewall of the reclosable container, the second film layer comprising an attachment surface being adapted to be sealed to the sidewall of the reclosable container, the attachment surface comprising a patterned portion that defines a region of flow channels, wherein opposing surfaces of the first and second film layers form a substantially gastight seal therebetween upon contact of the first and second film layers to each other; (iii) a first film layer aperture extending through the first film layer, the first film layer aperture being in fluid communication with an exterior side of the valve strip; and (iv) a second film layer aperture extending through the second film layer, the second film layer aperture being offset and spaced apart from the first film layer aperture, wherein the second film layer aperture is configured to be in fluid communication with the container aperture through the patterned portion of the attachment surface, the patterned portion extending along the attachment surface and into the second film layer aperture, wherein at least a portion of a surface of the second film layer opposite to the attachment surface comprises a patterned portion to provide flow channels in fluid communication with the second film layer aperture, such that a vacuum pressure dispersed over the first film layer aperture and the flow channels separates the first film layer and the second film layer, to allow gas to exhaust from the reclosable container through the container aperture. |
